SIM900A BOARD 1800/1900 MHZ GSM GPRS MODULE (Non-PTA Approved)

The SIM900A GSM/GPRS Module allows your microcontroller to communicate over a cellular network. Ideal for Arduino and Raspberry Pi projects, this module supports quad-band GSM (1800/1900 MHz) connectivity for sending and receiving calls, SMS, and data. Simply insert a SIM card and enjoy reliable wireless communication in your IoT or embedded projects.

Key Features

• Supports dual power input: 5V (VCC5) or 3.5–4.5V (VCC4).
• Onboard SMA and IPX mini antenna interfaces for flexible connectivity.
• Compact design: 49mm × 50mm PCB with labeled pins for easy prototyping.
• Low power consumption: standby in mA range, 10mA sleep mode.
• Compatible with 3.3V and 5V TTL serial logic for MCU communication.
• Integrated ESD protection chip (SMF05C) on SIM card circuit.
• Optimized antenna circuit ensures strong, stable GSM signal.
• Fully compliant with SIM900A design standards for consistent performance.

Technical Specifications

• Operating Frequency: 1800/1900 MHz (Quad-band GSM)
• Logic Level: TTL compatible with 3.3V and 5V
• Antenna Interfaces: SMA straight head (default) & IPX mini connector
• Speech Interface: Integrated MIC interface
• Power Supply: DC 5V ≥ 1A (VCC5) or DC 3.5–4.5V (VCC4)
• Current Consumption: Low power standby mode (~10mA)

Pin Description

• GND: Ground
• SIMR: RXD input (TTL level)
• SIMT: TXD output (TTL level)
• RST: Active low reset
• VCC_MCU: Connect to 5V or 3.3V depending on MCU logic level
• VCC5: DC 5V power input
• VCC4: DC 3.5–4.5V power input (e.g., lithium battery)

Onboard Components

• Protected serial communication circuit
• SMA antenna interface
• Flip SIM card slot
• Four mounting holes (3.5mm)
• SIM900A serial output terminal

Applications

• IoT and M2M communication
• Remote monitoring systems
• SMS-based control systems
• Wireless data transmission for embedded projects

Package Includes

• 1 × SIM900A V4.0 GSM/GPRS Module
• 1 × Power Cable
• 1 × Antenna

Looking for where to buy electronic components locally? Explore top-rated online Pakistan stores -CircuitHub, offering reliable modules and accessories at affordable prices.