Crowtail SIM A7670E 4G Module

Crowtail SIM A7670E 4G Module

Crowtail SIM-A7670E Drop-in 4G LTE Cat-1 module delivers 10 Mbps data, global GNSS positioning and Crowtail connectors—perfect for IoT trackers, SMS dialers and remote sensors.

Specifications

• It’s an LTE Cat-1 4G module using the Simcom SIM A7670E chip, optimized for Europe only.

• Offers 4G data transmission, voice calls, and multisatellite navigation support: GPS, GLONASS, and BDS.

Cellular & Network Capabilities

• LTE-FDD bands supported: B1, B3, B5, B7, B8, B20

• GSM bands: 900 MHz and 1800 MHz

• Data speeds:

  • LTE: 10 Mbps downlink / 5 Mbps uplink

  • GPRS/EDGE: up to 236.8 kbps up/down

• Transmit power:

  • GSM (EGSM900): Class 4 (≈33 dBm ± 2 dB)

  • GSM (DCS1800): Class 1 (≈30 dBm ± 2 dB)

  • EDGE (EGSM900): Class E2 (~27 dBm ± 3 dB)

  • EDGE (DCS1800): Class E1 (~26 dBm +3/–4 dB)

  • LTE: Class 3 (≈23 dBm ± 7 dB)

Interfaces & Connectivity

• Communication interfaces: UART and USB (via USB-C)

• Firmware upgrade methods: USB and FOTA (firmware-over-the-air)

• Supported network protocols: TCP/IP, IPv4, IPv6, Multi-PDP, FTP, FTPS, HTTP, HTTPS, DNS

• Phonebook types: SM, FD, ON, AP, SDN

• Block diagram (on Elecrow page) shows interfaces like USB-C, UART header (HY2.0-4P), battery charging (PH2.0-2P), power button, SIM slot, GNSS antenna, etc.

Power Requirements

• Supply voltage (VBAT): 3.4 V to 4.2 V (typical: 3.8 V)

• Power interface: USB-C for both power and communication; also includes a battery terminal

Size & Weight

• Dimensions: ~35 mm × 50 mm

• Weight: ~19.5 g

Frequency & Cellular Bands

• GSM/EGSM: 850, 900, 1800, 1900 MHz (specific support varies – A7670E includes EGSM900 and DCS1800)

• LTE-FDD bands: B1, B3, B5, B7, B8, B20, B28, B66 (as per module table; A7670E supports some of these)

• LTE-TDD bands: B34, B38, B39, B40, B41

Physical & Interface Layout

• Form factor: LGA module, ~24 × 24 × 2.5 mm, 88 pins (68 outer, 20 inner)

• Interfaces include:

  • Power (VBAT, USB_VBUS)

  • USB 2.0 (slave)

  • UART (full, debug, ordinary), with support for up to 3.6864 Mbps, hardware flow control, multiplexing

  • PCM audio interface (voice calls possible)

  • USIM interface (1.8 V / 3 V)

  • ADC (12-bit, 0–1.3 V input)

  • I²C (100/400 kbps)

  • GPIOs

  • NETLIGHT and status indication LEDs

  • LDO 1.8 V output (max 50 mA)

• LTE Cat-1 throughput: up to 10 Mbps DL / 5 Mbps UL

• Packs voice, SMS, data features, temperature range of –30 °C to +80 °C (–40 to +85 °C extended)

• Transmit powers: as previously noted per band and standard

• Absolute max ratings:

• VBAT max: 4.7 V

• I/O pins: ~2.1 V
• USB_VBUS: up to 5.4 V

• Operating conditions: VBAT recommended 3.4–4.2 V (typ 3.8 V)

• Antenna design: 50 Ω impedance; low insertion loss recommended (<0.5 dB for 700–960 MHz, etc.)

• ESD and moisture sensitivity: Module is MSL-3, ESD-sensitive; follow proper handling guidelines

Summary Table

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