The Microchip Technology Inc. 25AA02UID-I/SN is a 2 Kbit Electrically Erasable PROM with a pre-programmed, 32-bit unique ID. This serial number is unique across all UID-Family EEPROMs. The ID is Scalable to 48-bit, 64-bit, 128-bit, 256-bit, and other lengths. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a Chip Select (CS) input. Communication to the device can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the exception of Chip Select, allowing the host to service higher priority interrupts. The 25AA02UID-I/SN is available in the standard 8-lead SOIC and 6-lead SOT-23 packages.
Feature
- Pre-programmed 32-bit Serial Number
- Unique Across All UID-Family EEPROMs
- Scalable to 48-bit, 64-bit, 128-bit, 256-bit, and other lengths
- 10 MHz max. Clock Frequency
- Low-Power CMOS Technology:- Max. Write Current: 5 mA at 5.5V- Read Current: 5 mA at 5.5V, 10 MHz- Standby Current: 1 µA at 2.5V
- 256 x 8-bit Organization
- Write Page mode (up to 16 bytes)
- Sequential Read
- Self-Timed Erase and Write Cycles (5 ms max.)
- Block Write Protection:- Protect none, 1/4, 1/2 or all of array
- Built-in Write Protection:- Power-on/off data protection circuitry- Write enable latch- Write-protect pin
- Available Packages:- 8-lead PDIP, 8-lead SOIC, and 5-lead SOT-23
- Endurance: 1,000,000 Erase/Write cycles
- Data retention: >200 years
- ESD protection: >4000V
- Temperature Ranges Supported:- Industrial(I): -40C to +85C
