Reference Design

Benefits:

  • Provides newest solution for 2G/4G GPS tracking device
  • Offers Schematic, BOM list
  • Provides documents, tutorials, demo and enthusiastic support from sales/FAE team.

Features:

  • Main: module SIMCom combo CAT1+GNSS, support embedded RTOS, external MCU is unecessary.
  • Ultra-low power accelerometer sensor with I2C interface.
  • Provides RS232 connector, easy to communicate with external sensors.
  • 64Mbit NOR Flash allows to store trip and device settings.
  • RFID tag reader ISO15693 13.56MHz
  • Buck converter 45V, 2.5A

Block Diagram:

DiagramDescription automatically generated

Detailed Features and Schematic:

Cellular + GNSS A7672S_FASE SIMCom

  • Single Processor ARM Cortex R5, CPU frequency 624MHz, embedded RTOS.
  • PSRAM: 1.6MByte - DRAM Core + SRAM interface
  • NOR FLASH: 16Mbyte
  • 2 UART, 1 SPI, 1 I2C, 33 GPIO, 1 Analog audio, 1 channel 9bit ADC
  • Dual SIM Card, 1 IMEI, support hot switch
  • Category: CAT1 - 2G 900/1800MHz, 4G band 1, 3, 5, 8, 20
  • Support GNSS, Bluetooth 5.0
  • SPI camera interface 0.3MP pixel encoding
  • SPI LCD interface

Simcard Holder:

  • User can choose Nano Simcard or eSIM
  • eSIM is an embedded SIM, contains Mobile network operator profiles.

LED indication

Bus Switch TC7MPB9307FK Toshiba

  • Shift level 8 channels
  • VCCA: 1.65-5V
  • VCCB: 2.3-5.5V
  • Small package: VSSOP20

RS232 Transceiver

  • UT3222 3.0-5.5V
  • Two channels of RS232

Accelerometer:

  • Ultra-low power accelerometer sensor, I2C interface
  • Pin-to-Pin Kionix

\

EXTERNAL NOR FLASH ESMT

  • EN25QH64A-104HIP 8SOP 200mil 3.3V
  • 64Mbit NOR Flash allows to store trip and device settings.

SWITCHING REGULATOR IC

  • Maximum input voltage: 45V, output current: 2.5A
  • Switching frequency up to 2.4MHz, allows to reduce inductor size

LDO 3.3V Toshiba

  • Ultra-low quiescent current TCR3UF33A,LM
  • Output 3.3V, 300mA

RFID tag reader ISO15693 Holtek

  • BC45B4523 support tag ISO15693
  • Comparasion table between BC45B4523 and CR95HF:

BOM LIST

Description

Comment

Footprint

Qty

Mfr

Mpn

LOW POWER MULTICHANNEL RS-232 LINE TRANSCEIVERS TSSOP20

UT3222

TSSOP20

1

UTC

UT3222

Ultra low quiescent current, Fast Load Transient 300 mA CMOS Low Dropout Regulator

TCR3UF33A

SOT-25-5

1

Toshiba

TCR3UF33A,LM

IC BUS SWITCH 8 X 1:1 20VSSOP

TC7MPB9307FK

VSSOP20

1

Toshiba

TC7MPB9307FK

Inductor SWPA6028S4R7MT 6x6x2.8mm

SWPA6028S4R7MT

IND-SWPA6028S

1

Sunlord

SWPA6028S4R7MT

E-SIM DFN8 5x6mm

eSIM

WDFN8 5x6

1

Valid

S3FW9FJM

2.4MHz, 2.5A MOSFET Switching Regulator IC for Buck Converter

NJW4171

HSOP8

1

NJR

NJW4171

Nano Sim card Socket

SimSocket

MUP-C7801

1

MUP

MUP-C7801-2

Low power Accelerometer X, Y, Z Axis ±2g, 4g, 8g, 12g, 16g, 12-LGA (2x2)

MC3416

12-VFLGA

1

Memsic

MC3416

FIXED IND 470NH 1.4A 87.5 MOHM

470nH

INDC-1206 (3216)

2

Murata

LQM31PNR47M00L

NOR FLASH 64MBit

Flash

SOP8-200MIL

1

ESMT

EN25QH64A-104HIP

NFC Reader

BC45B4523

QFN-24

1

Holtek

BC45B4523

LTE CAT 1 module, 2G/4G + GNSS

A7672_openMCU

A7672

1

SIMCom

A7672S_FASE

Switch

SWITCH

SWITCH2_SMD

2

*

*

Capacitor 10uF 50V 1206

10uF/50V

CAPC-1206 (3216)

1

*

*

Capacitor 1nF 0603

1nF

CAPC-0603 (1608)

1

*

*

Capacitor 1uF 0603

1uF

CAPC-0603 (1608)

5

*

*

Capacitor Aluminum 100uF/10V 6534

100uF/10V

CAP_ALUM_6354

2

*

*

Capacitor 9pF 0603

9pF

CAPC-0603 (1608)

1

*

*

Capacitor 0.1uF 0603

0.1uF

CAPC-0603 (1608)

12

*

*

Option, Capacitor

(NC)

CAPC-0603 (1608)

5

*

*

Capacitor 22pF 0603

22pF

CAPC-0603 (1608)

3

*

*

Capacitor 18pF

18pF

CAPC-0603 (1608)

2

*

*

Tune Capacitor

Cap

CAPC-0603 (1608)

9

*

*

Micro usb type B

Micro USB

MICRO-USB-B

1

*

*

3A/100V

3A/100V

SMA-DO214AC

1

*

*

LED SMD

LED

LED_SMD_0603_RED

5

*

*

Jac DC input

Jac DC

JackDC

1

*

*

CONN UMC RCPT STR 50 OHM SMD

IPEX

IPEX

2

*

*

9 Position D-Sub Receptacle, Female Sockets Connector

D-SUB9

D-SUB9

1

*

*

WR-PHD 2.54 mm Angled Socket Header

JP4

JP4

1

*

*

Inductor 68nH 0603

68nH

INDC-0603 (1608)

1

*

*

FERRITE BEAD 23 OHM 0603 1LN

23R/4A

INDC-0603 (1608)

2

*

*

PDTC123

PDTC123

SOT23B

2

*

*

NPN

Trans NPN

SOT23B

2

*

*

Resistor 10k 0603

10k

RESC-0603

16

*

*

Resistor 6.8k 0603

6.8k

RESC-0603

1

*

*

Resistor 487k 0603

487k

RESC-0603

1

*

*

Resistor 120k 0603

120k

RESC-0603

1

*

*

Res 10R 0603

180R

RESC-0603

1

*

*

Option

(0R)

RESC-0603

10

*

*

Resistor 1k 0603

1k

RESC-0603

4

*

*

Resistor 22R 0603

22R

RESC-0603

3

*

*

Resistor 4.7k 0603

4.7k

RESC-0603

5

*

*

Resistor 470R 0603

470R

RESC-0603

1

*

*

Resistor 3.3k 0603

3.3k

RESC-0603

1

*

*

RESA-AS 1206 1R 1% 250MW TC400

1R

RESC-1206 (3216)

2

*

*

Crystal Oscillator

27.12MHz

XTAL_EPSON_TSX-3225

1

*

*

Learn more: