Microchip 25AA256-I/P are 256 Kbit Serial Electrically Erasable PROMs. 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).Max. Clock 10 MHz Low-Power CMOS Technology: - Max. Write Current: 5 mA at 5.5V, 10 MHz, - Read Current: 6 mA at 5.5V, 10 MHz, - Standby Current: 1 μA at 5.5V 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 Sequential Read High Reliability: - Endurance: 1,000,000 erase/write cycles, - Data retention: > 200 years, - ESD protection: > 4000V Temperature Ranges Supported: Automotive AEC-Q100 Qualified More information:  | | Memory Size: | 256kbit | Interface Type: | Serial-SPI | Package Type: | DFN, PDIP, SOIC, TSSOP | Mounting Type: | Through Hole | Pin Count: | 8 | Organisation: | 32K x 8 bit | Minimum Operating Supply Voltage: | 1.8 V | Maximum Operating Supply Voltage: | 5.5 V | Programming Voltage: | 1.8 → 5.5V | Number of Bits per Word: | 8bit | Dimensions: | 9.27 x 6.35 x 3.3mm | Data Retention: | 200yr | Maximum Operating Temperature: | +85 °C | Maximum Random Access Time: | 50ns | Minimum Operating Temperature: | -40 °C |
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