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SIM Card Pinout – Mini, Micro, Nano (8-Pin ISO/IEC 7816)

Description

Standard SIM card pinout for mini, micro, and nano variants (ISO/IEC 7816). Includes pin functions: VCC (power), GND, I/O (data), CLOCK, RESET, and reserved pins. Essential for embedded design, mobile hardware development, and SIM interface troubleshooting.

Sim Card 

     ┌─────────────┐
     │ 1   5       │
     │ 2   6       │
     │ 3   7       │
     │ 4   8       │
     └─────────────┘

Connector at the card

Pin Configuration & Description

Pin Description
1 [VCC] +5V or 3.3V DC power supply input
Provides operating voltage to the SIM chip.
2 [RESET] Card reset, used to reset the card's communications (optional)
Sends a reset signal to restart communication protocol.
3 [CLOCK] Card clock
Synchronizes data transfer between the mobile device and SIM card.
4 [RESERVED] AUX1, optionally used for USB interfaces and other uses
Not used in standard GSM/UMTS/LTE SIMs; reserved for future or specialized applications.
5 [GND] Ground
Common ground reference for all signals.
6 [VPP] +21V DC programming voltage input (optional)
Used during manufacturing to program the SIM chip; not active in normal operation.
7 [I/O] Input or Output for serial data (half-duplex)
Bidirectional data line for exchanging information between the phone and SIM.
8 [RESERVED] AUX2, optionally used for USB interfaces and other uses
Reserved for future use or special applications such as smart card emulation.

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Master Electrician
Master Electrician
Electrical Engineer
10Year<
China
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