Introduction to NB Module - NM1
About This Document
Applicable Scope
This document describes hardware interface specifications, electrical features, mechanical specifications, and other related in formation about the NM1 module to help you design and develop NM1 module hardware.
Purpose
This document provides NM1 module design and development bases. Through this document, you can know the NM1 module and its technical parameters and develop related functional product or devices. In addition to functional features and technical parameters, this document also describes the product reliability test, related test standards, service function implementation process, RF performance indicators, and circuit design.
Acronyms and Abbreviations
Table 1-2 Acronyms and abbreviations
Acronyms
Full Spelling
ESD
electrostatic discharge
USB
Universal Serial Bus
UART
universal asynchronous receiver/transmitter
SIM
subscriber identity module
SPI
serial peripheral interface
I2C
inter-integrated circuit
I/O
Input/Output
GPIO
General Purpose Input/Output
TDB
To be determined
RTC
real-time clock
ADC
analog to digital converter
Product Overview
NM1 is a compact , high performance, and low power NB IoT series module. It has the following features:
Supports the B1,B3, B5, B8, B20 frequency bands (B2/B23/B13/B17/B18/B19/B25/B26/B28/B66 are in developing stage).
Provides the SIM card interface (1.8 V), USB 1.1 interface, UART interface, SPI, I 2 C interface, and GPIO interface.
Package Dimensions
The NM1 module has 66 pins. Its dimensions is 17.7 2.4 mm (H) x 17.7 mm (W) x 15.8 mm (D).
Technical Parameters
Table 2-1 describes mechanical features, baseband features, RF features, technical standards, and environment features of the NM1 module.
Table 2-1 Technical parameters of the NM1 module
Item
Parameter
Specifications
Mechanical features
Package size and type
17.7 mm x 15.8 mm x 2.6 mm Stamp hole (52 pins) and base pad (14 pins)
Module
Platform
MT2625
Module
Processor architecture
ARM Cortex-M4
Module
SIM card interface
1.8 V
Module
USB interface
USB 1.1
Module
Voltage
2.1 V to 3.63 V
Module
Working mode
Active: The NM1 module is active and can send and receive data. All functions are available. An active NM1 module can switch to the idle or PSM mode. Idle: The NM1 module is in idle state, connected to a network, and can receive paging messages. An idle NM1 module can switch to the active or PSM mode. PSM: Only RTC of the module works, and the module is disconnected from the network and cannot receive paging messages. The NM1 module is woken up from the PSM mode when the timer expires or the PWRKEY and PSM_EINT* pins are lowered.
Module
Power-saving
In PSM mode, the NM1 module consumes the minimum power of 5 µA. The PSM mode is provided to reduce power consumption and prolong the power supply duration of the battery.
Module
Serial port
Primary serial interface: transmits AT commands and data. The default baud rate is 115.2 kbit/s. It can also be used for firmware upgrade and the baud rate is 921.6 kbit/s. Debugging serial interface: exports log information for software commissioning. Auxiliary serial interface: transmits AT commands and data.
Module
Working current
TBD
Module
RTC
Supported
Module
ADC*
The NM1 module has a 10-bit analog-digit conversion input interface to measure the voltage. This interface works in both active and idle modes.
Module
RI signal*
When the NM1 module receives SMS messages or exports URC, it notifies the DTE over the RI pin.
Module
Network status indication*
The NETLIGHT signal indicates the module's network connection status.
RF
Frequency band
B1, B2*, B3, B5, B8, B12*, B13*, B17*, B18*, B19*, B20, B25*, B26*, B28*, and B66*
RF
Maximum TX power
23±2 dBm
RF
Receiving sensitivity
TBD
RF
Main antenna interface
Supported
RF
Antenna interface
Characteristic impedance of 50 ohms. The antenna is provided by a third party, but not Tuya.
Technical standard
Data rate
Single-tone: downlink 25.5 kbit/s and uplink 16.7 kbit/s Multi-tone*: downlink 25.5 kbit/s and uplink 62.5 kbit/s
Technical standard
Network protocol
UDP/TCP/CoAP/LWM2M/PPP*/SSL*/DTLS*/FTP*/HTTP*/MQTT*/HTTPS*
Environment feature
Temperature
Normal operating temperature: –35°C to +75°C1 Extended operating temperature: –40°C to +85°C2 Storage temperature: –40°C to +90°C
application
SMS*
Text and packet data unit (PDU) modes
application
Upgrade
Upgrade is performed over the primary serial interface.
Note:
1) When the NM1 module works at a temperature within the normal operating temperature range 1 , its performance complies with 3GPP standards.
2) When the NM1 module works at a temperature within the extended operating temperature range 2 , it works properly, has the SMS* and data transmission functions, and will not have unrecoverable faults. The RF spectrum and network are not affected. Several indicators, for example, the output power, may exceed the 3GPP limits. After the operating temperature is restored to the normal operating temperature, all NM1 module indicators can meet 3GPP standard requirements.
3) A feature with an asterisk (*) is being developed.
Product Functions
Baseband Functions
The NM1 module baseband includes the USB interface signal, SIM card interface signal, I 2 C interface signal, UART interface signal, working status indicator signal, module startup and reset signals, and multiplexing control signals, power supply, and grounding of multiple GPIO interfaces.
RF Functions
Table 2-2 Working frequency bands
Working Frequency Band
Uplink (MHz)
Downlink (MHz)
B1
1920–1980
2110–2170
B2*
1850–1910
1930–1990
B3
1710–1785
1805–1880
B5
824–849
869–894
B8
880–915
925–960
B12*
699–716
729–746
B13*
777–787
746–756
B17*
704–716
734–746
B18*
815–830
860–875
B19*
830–845
875–890
B20
832–862
791–821
B25*
1850–1915
1930–1995
B26*
814–849
859–894
B28*
703–748
758–803
B66*
1710–1780
2110–2200
Note: The NM1 module is being developed to support the frequency bands with an asterisk (*).
Table2-3 Line loss requirements
Frequency Band
Requirement
LTE B5, B8, B12*, B13*, B17*, B18*, B19* , B20, B26* , and B28*
Line loss < 1 dB
LTE B1, B2*, B3, B25*, and B66*
Line loss < 1.5 dB
Table 2-4 Antenna requirements
Item
Requirement
Frequency band
LTE B1, B2*, B3, B5, B8, B12*, B13*, B17*, B18*, B19*, B20, B25*, B26*, B28*, and B66*
Standing wave ratio (SWR)
≤ 2
Efficiency (%)
≥ 30
Maximum input power (W)
50
Input impedance (ohm)
50
Polarization type
Linear polarization
Note: The NM1 module is being developed to support the frequency bands with an asterisk (*).
Table 2-5 Conducted RF transmit power
Frequency Band
Maximum Value (dBm)
Minimum Value (dBm)
B1
23±2 dBm
< –39
B2*
23±2 dBm
< –39
B3
23±2 dBm
< –39
B5
23±2 dBm
< –39
B8
23±2 dBm
< –39
B12*
23±2 dBm
< –39
B13*
23±2 dBm
< –39
B17*
23±2 dBm
< –39
B18*
23±2 dBm
< –39
B19*
23±2 dBm
< –39
B20
23±2 dBm
< –39
B25*
23±2 dBm
< –39
B26*
23±2 dBm
< –39
B28*
23±2 dBm
< –39
B66*
23±2 dBm
< –39
Note:
1) The designed conducted RF transmit power complies with the NB IoT protocol in 3GPP Release 13 and Release 14.
2) The NM1 module is being developed to support the frequency bands with an asterisk (*).
Interfaces
Pin Definition
Pin Symbols
Table 3-1 Pin symbols
Pin Symbol
Description
I
Input
O
Output
I/O
Input/Output
Pin Configuration Diagram
Figure 3-1 shows the NM1 module's interface pins.
Pins
Table 3-2 Interface pin definition
Pin No.
Analog Signal Definition
Pin Attribute
Input/Output
Pin Voltage (V)
Remarks
1
AGND
GND
N/A
N/A
N/A
2
GPIO0
GPIO0
N/A
1.8
N/A
3
SPI_MISO
Primary device input and secondary device output signal
I
1.8
N/A
4
SPI_MOSI
Primary device output and secondary device input signal
O
1.8
N/A
5
SPI_SCLK
Serial clock signal
O
1.8
N/A
6
SPI_CS
Chip selection signal
O
1.8
N/A
7
PWRKEY
Lower PWRKEY to power on the NM1 module.
I
Maximum value of VIL: 0.3 x VBAT Minimum value of VIH: 0.7 x VBAT
N/A
8
GPIO22
GPIO22
N/A
N/A
N/A
9
ADC0
Common analog-digit conversion interface
I
0–1.4 V
N/A
10
SIM_GND
GND dedicated for the SIM card
N/A
N/A
N/A
11
SIM_DATA
SIM card data signal
I/O
Maximum value of VIL: 0.25 x SIM_VDD Minimum value of VIH: 0.75 x SIM_VDD Maximum value of VOL: 0.15 x SIM_VDD Minimum value of VOH: 0.85 x SIM_VDD
N/A
12
SIM_RST
SIM card reset signal
I/O
Maximum value of VOL: 0.15 x SIM_VDD Minimum value of VOH: 0.85 x SIM_VDD
N/A
13
SIM_CLK
SIM card clock signal
I/O
Maximum value of VOL: 0.15 x SIM_VDD Minimum value of VOH: 0.85 x SIM_VDD
N/A
14
SIM_VDD
SIM card power signal
O
1.8
N/A
15
RESET
Used to reset the NM1 module, which is active at low level
I
N/A
N/A
16
NETLIGHT
Network status indication
O
N/A
N/A
17
RXD
Primary serial interface that receives data
I
1.8
N/A
18
TXD
Primary serial interface that transmits data
O
1.8
N/A
19
PSM_EINT
External interrupt pin, which is used to wake up the NM1 module from the PSM mode
I
N/A
N/A
20
SRCLKENAI
NFC interface
N/A
1.8
N/A
21
USB_DP
USB+ signal
N/A
N/A
N/A
22
USB_DM
USB– signal
N/A
N/A
N/A
23
USB_EINT
USB_EINT
N/A
24
VIO18_EXT
1.8 V output power (In PSM mode, no voltage is output.)
O
Vmin = 1.53 V Vnorm = 1.8 V
N/A
25
DVDD_IO
NC
NC
NC
N/A
26
NC
NC
N/A
N/A
N/A
27
GND
GND
N/A
N/A
N/A
28
UART1_RXD
Auxiliary serial interface that receives data
I
1.8
N/A
29
UART1_TXD
Auxiliary serial interface that transmits data
O
1.8
N/A
30
UART1_CTS
Determines whether data is received.
N/A
1.8
N/A
31
UART1_RTS
Determines whether data is transmitted.
N/A
1.8
N/A
32
I2C0_SDA
I2C0 data
I/O
N/A
N/A
33
I2C0_SCL
I2C0 clock
O
N/A
N/A
34
GND
GND
N/A
N/A
N/A
35
RF_ANT
RF antenna
Characteristic impedance of 50 ohms
36
GND
GND
N/A
N/A
N/A
37
GND
GND
N/A
N/A
N/A
38
RXD_DBG
Debugging serial interface that receives data
I
1.8
N/A
39
TXD_DBG
Debugging serial interface that transmits data
O
1.8
N/A
40
GND
GND
N/A
N/A
N/A
41
GND
GND
N/A
N/A
N/A
42
VSYS_BB
Input power
I
Vmin = 2.1 V Vnorm = 3.3 V Vmax = 3.63 V
N/A
43
VBAT_BOOST
Input power
I
Vmin = 2.1 V Vnorm = 3.3 V Vmax = 3.63 V
N/A
44
VSYS_PA
Output power
O
3.3
N/A
45
GPIO11
Reserved
N/A
1.8
N/A
46
GPIO10
Reserved
N/A
1.8
N/A
47
GPIO25
Reserved
N/A
1.8
N/A
48
MD_WAKEUP
N/A
N/A
N/A
N/A
49
GPIO28
Reserved
N/A
1.8
N/A
50
AP_READY
N/A
N/A
N/A
N/A
51
STATUS
N/A
N/A
N/A
N/A
52
GPIO24
Reserved
N/A
1.8
N/A
53
GPIO34
Reserved
N/A
1.8
N/A
54
GPIO33
Reserved
N/A
1.8
N/A
55
GPIO21
Reserved
N/A
1.8
N/A
56
GPIO20
Reserved
N/A
1.8
N/A
57
GPIO8
Reserved
N/A
1.8
N/A
58
GPIO1
Reserved
N/A
1.8
N/A
59
GPIO19
Reserved
N/A
1.8
N/A
60
RTC_GPIO0
N/A
N/A
N/A
N/A
61
SIM_DET
GPIO35
N/A
SIM card detection
N/A
62
GPIO32
Reserved
N/A
1.8
N/A
63
AVDD33_VUSB
N/A
I
N/A
N/A
64
FREF
Base frequency
I
N/A
N/A
65
GPIO31
GPIO31
N/A
1.8
N/A
66
GND
GND
N/A
N/A
N/A
Electrical Conditions
Table 3-3 Electrical conditions
Signal
Description
Minimum Value
Typical Value
Maximum Value
Unit
VBAT_BOOST
Input power
2.1
3.3
3.63
V
VSYS_BB
Input power
2.1
3.3
3.63
V
VSYS_PA
Output power
N/A
3.3
N/A
V
Power Interface
Power Pins and Grounding
The NM1 module can be powered by a battery or external power supply. The GND signal pins indicate the power ground and signal ground of the NM1 module and need to be connected to the ground of the PCB . Improper connections of the GND signal pins may have adverse impact on the NM1 module performance.
Power Supply Requirements
The NM1 module's power design is important to its performance. The NM1 module can be powered by the low dropout regulator (LDO) with low static current and output current (up to 0.5 A) or the Li MnO2 battery. The input voltage range is from 2.1 V to 3.63 V. During data transmission, the power cannot be lower than the minimum working voltage 2.1 V. Otherwise, errors will occur. To ensure better power supply performance, it is recommended that three 47 µF (0805) ceramic capacitors and100 nF, 100 pF, and 22 pF (0402) filter capacitors be connected in parallel at the VBAT input end of the module. In addition, it is recommended that a TVS tube be connected to the VBAT input end to enhance the surge voltage bearing capability of the module. In principle, a longer VBAT cable leads to a larger trace width. Figure 3 2 shows the reference circuit.
SIM Card Interface
Pins
Table 3-4 Definition and description of SIM card interface signals
Pin No.
Signal Name
Signal Definition
Remarks
11
SIM_DATA
SIM card data pin
Voltage precision: 1.8 V±5% Maximum current: about 60 mA
13
SIM_CLK
SIM card clock pin
Voltage precision: 1.8 V±5% Maximum current: about 60 mA
12
SIM_RST
SIM card reset pin
Voltage precision: 1.8 V±5% Maximum current: about 60 mA
14
SIM_VDD
SIM card power supply pin
Voltage precision: 1.8 V±5% Maximum current: about 60 mA
SIM Card Interface Application
To ensure a better external SIM card performance and prevent the external SIM card being damaged, design the SIM card interface circuit in compliance with the following rules:
1)Place the external SIM card holder near the NM1 module. The external SIM card signal cable is 200 mm or shorter and is away from the RF cable and VBAT power cable.
2)The SIM_VDD decoupling capacitance does not exceed 1 μF, and the capacitor is near the external SIM card holder.
3)To prevent interference, keep the SIM_CLK and SIM_DATA signal cables at a certain distance from each other and use a ground cable to separate them
4)Connect the SIM_RST signal cable to the ground. To ensure a better ESD performance, you are advised to use TVS tubes to protect the pins of the external SIM card holder. The parasitic capacitance of the TVS tubes cannot be greater than 50 pF. Place ESD components near the external SIM card holder. Route the external SIM card signal cable from the external SIM card holder to the NM1 module through the ESD components.
SPIs
Pins
Table 3-7 defines the SPI signals. (SPIs support the slave mode.)
Table 3-5 SPI signal definition
Pin No.
Signal Name
Function Description
3
SPI_MISO
Master input and slave output
4
SPI_MOSI
Master output and slave input
5
SPI_ SCLK
SPI clock signal
6
SPI_CS
SPI selection signal
SPI Electrical Parameters and application
The level of the SPI on the NM1 module is 1.8 V. If the host level is 3.3 V, add a level converter between the NM1 module and host. The level converter that supports the SPI data rate is recommended. Figure 3 4 shows the reference circuit.
I2C Interface
Pins
Table 3-6 I2C interface signal definition
Pin No.
Signal Name
Function Description
32
SDA
I2C serial data
33
SCL
I2C serial clock
I2C is a two line bus for communication between ICs. It has a serial data cable (SDA) and a serial clock cable (SCL) to transmit information between connected devices. I 2 C identifies each device based on its unique address and can be used as both a transmitter and a receiver.
I2C Interface Electrical Parameters and application
UART Interface
Pins
The NM1 module provides three UART interfaces. The primary serial interface can be used for firmware upgrade. The default baud rate is 115.2 kbit/s, and the downloading baud rate is 921.6 kbit/s. You can use a log viewing tool to view logs over the debugging serial interface to debug software.
Table 3-7 UART interface signal definition
Pin No.
Signal Name
Function Description
17
RXD
Data receiving over the primary serial interface
18
TXD
Data transmission over the primary serial interface
28
UART1_RXD
Data receiving over the auxiliary serial interface
29
UART1_TXD
Data transmission over the auxiliary serial interface
38
RXD_DBG
Data receiving over the debugging serial interface
39
TXD_DBG
Data transmission over the debugging serial interface
UART Interface Electrical Parameters and application
Figure 3-6 Reference circuit
The level of the UART interfaces on the NM1 module is 1.8 V. If the application system level is 3.3 V, add a level converter to the connection between the NM1 module and application system over the serial interface. Figure 3 7 shows the reference circuit with a level converter, UM3202.
A triode can also be used for level conversion.
Note: Connection methods of the debugging, auxiliary, and primary serial interfaces are similar.
USB Interface
Pins
The NM1 module has a USB 1.1 interface, which can only be used for module upgrade. If ESD design is required, the maximum capacitance of ESD components must be less than 0.5 pF. Otherwise, waveform distortion may occur, affecting bus communication. The differential impedance of differential data cables must be within 90 ohms.
Table 3-8 USB inte rface signal definition
Pin No.
Signal Name
Function Description
17
RXD
Receiving over the serial interface
18
TXD
Transmission over the serial interface
21
USB_DP
USB+ signal
22
USB_DM
USB– signal
63
AVDD33_VUSB
Internal USB power supply
USB Interface Application
The nominated input power of the NM1 module is 3.3 V. When the USB interface is used for downloading, add an LDO circuit to keep t he circuit voltage at 3.3 V.
Power On/Power Off and Reset Interface
PWRKEY Pin
Table 3-9 PWRKEY signal definition
Pin No.
Signal Name
Function Description
7
PWRKEY
NM1 module power-on
Power On/Power Off Interface application
To power on the NM1 module, lower the PWRKEY pin to a low level for a period of time and then disconnect it or raise it to a high level.
RESET Pin
Pin No.
Signal Name
Function Description
15
RESET
NM1 module resetting
To reset the NM1 module, lower the RESET pin to a low level for a period of time and then disconnect it or raise it to a high level.
RESET Interface Application
Design Instructions
This chapter provides general design guidance about the NM1 module to ensure a better product performance.
General Design Rules and Requirements
During peripheral circuit design, ensure that the external power supply have sufficient power and the differential impedance of the USB 1.1 signa l cable is within 90 ohms. Design general signal interfaces as required to match the interface signal level and prevent the NM1 module being damaged due to inconsistent levels. The NM1 module has good RF indicator performance. You need to design the antenna circuit on the PCB as required and control the impedance to prevent the RF indicators being affected.
Power Supply Circuit Design
The power supply on the PCB should supply 0.5 A or higher power to meet peak current requirements of the NM1 module. The trace width on the PCB must be large enough and form good circulation with the ground. In addition, add a large capacitor with over 1000 μF to the power supply circuit to ensure transient power supply, and control the power ripple within 100 mV.
RF Circuit Design
34
GND
GND
N/A
N/A
N/A
35
RF_ANT
RF antenna
50 ohms characteristic impedance
36
GND
GND
N/A
N/A
N/A
37
GND
GND
N/A
N/A
N/A
RF Antenna Circuit Design
It is recommended that a πtype matching circuit be reserved during RF antenna per ipheral circuit design. Ensure that the matching circuit is near the antenna, and attach resistors based on actual debugging conditions.By default, no resistor is attached to C1 and C2, and a 0 ohms resistor is attached to R1. The RF antenna peripheral circuit must have 50 ohms impedance. In the recommended RF antenna peripheral circuit layout solution, the RF cable is routed at layer 1 and the reference cable at layer 2. Use the Shortcut to Si9000 software to calculate the PCB cable impedance of the RF antenna. Figure 4 1 shows a model. During PCB cabling design, ensure that the RF reference point is complete.
During impedance calculation, specify parameters shown in Figure 4 2 and change the RF trace width to obtain the required impedance value. For typical antennas, 50 ohm impedance is recommended.
Precautions for Initial Antenna Design
Pre-project Evaluation
Ensure that the antenna is horizontal with the base station for maximum efficiency. Do not place the antenna near the power cable, data cable, or chip that may generate electromagnetic interference. Do not reserve a place for hands on the antenna to prevent attenuation caused by the human body. Consider radiation reduction and structure implementation. In the initial design phase, th e structure, ID, circuit, and antenna engineers evaluate the antenna layout together.
Antenna Matching Circuit
If a long cable exists between the RF and antenna interfaces on the NM1 module, design 50 ohms characteristics impedance for the microstrip or stripline between the RF pad and the antenna interface during PCB circuit design. In addition, reserve a matching circuit.
Suggestions on EMC and ESD Design
During overall design, consider EMC issues related to signal integrity and power integrity. During peripheral circuit cabling of the NM1 module, reserve doubled trace width between the power cable and signal cable to reduce signal coupling and ensure pure return current. During peripheral power circuit design, place the decoupling capacitor near the power pin on the NM1 module, keep high frequency and high speed circuits and sensitive circuits away from the PCB edges, and isolate the circuits from each other to reduce interference. Protect sensitive signals, and shield circuits or components on the PCB that may interfere the NM1 module. Consider ESD protection during design. Place ESD components near the key input and output signal interfaces, for example, the SIM card signal interface, to protect them. On the PCB , reasonably design mechanical p arts and PCB layout and ensure proper grounding of metal shielding covers to provide a smooth channel for static electricity discharging.
PCB Solder Pad Design
You are advised to design the middle 14 pads on the PCB based on the sizes in the structure diagram. Externally extend the 52 signal pads around the PCB to the NM1 module for over 0.3 mm, and externally extend other three sides of the pads for 0.05 mm. Use 50 ohms impedance cables for the main antenna and Wi Fi antenna.
Thermal Design
The NM1 module generates heat when it works and may be affected by other high temperature components. TheNM1 module design ensures good heat dissipation. When connecting the NM1 module to the PCB , properly connect the thermal pad to the ground to ensure thermal conduction and balance and a better electrical performance. Note:
1)Place the NM1 module away from the power supply and high speed signal cables, and protect these cables.
2)Place the antenna and the coaxial cable that is used to connect the antenna and NICPlace the antenna and the coaxial cable that is used to connect the antenna and NIC away from these away from these interference sources. interference sources.
3)Place the NM1 module away from components that generate a large amount of heat such as the CPU to prevent Place the NM1 module away from components that generate a large amount of heat such as the CPU to prevent the RF performance being affected by high temperature.the RF performance being affected by high temperature.
Production Instructions
Stencil Design
During stencil design, note the following: 1) When making the stencil of the thermal pad at the bottom of the NM1 module, reduce the stencil opening by 25% to reduce short circuits between the thermal pad and functional pins around the NM1 module. 2)To ensure better solde ring, use step stencils. 3)Use a diagonal opening for the stencil of the thermal pad. Figure 5 1 shows recommended stencil strips.
Oven Temperature Curve
The oven temperature curve has great impact on the soldering quality and material status. When the temperature rises from the ambient temperature to 150°C, the rising speed is less than 3°C per second. A temperature higher than 217°C is allowed for a maximum of 70s, and 55s is recommended. Otherwise, some components may be invalid due to strong thermal attacks, resulting in a higher defect rate and more repair difficulty. The highest temperature cannot exceed 245°C. Some materials such as the crystal may have die cracks at a high temperature. As a result, the crystal does not work and the module functions are affected. Table 5 1 describes the oven temperature curve parameter settings, and Figure 5 2 shows the oven temperature curves.
Lead-free Oven Temperature Curve
Phase
Temperature
Description
Preheating
From the ambient temperature to 150°C
Rising speed: < 3°C per second
Heat preservation
150°C to 200°C
Duration: 40s to 110s
Soldering
> 217°C
Duration: 40s to 70s
Soldering
> 230°C
Duration: 15s to 45s
Soldering
Peak temperature
Maximum: 245°C
Soldering
Peak temperature
Minimum: 230°C
To prevent the NM1 module being damaged due to overheating, you are advised to attach the module after reflow soldering of the PCB's first side
Mechanical Dimensions
This chapter describes the mechanical dimensions of the NM1 module, in millimeters.
NM1 Module Mechanical Dimensions
Recommended Package Dimensions
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