IS25C64A

Notes:
1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions outside those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

The IS25C32A and IS25C64A are electrically erasable PROM devices that use the Serial Peripheral Interface (SPI) for communications. The IS25C32A is 32Kbit (4096 x 8) and the IS25C64A is 64Kbit (8192 x 8). The IS25C32A/64A EEPROMs are offered in a wide operating voltage range of 1.8V to 5.5V to be compatible with most application voltages. ISSI designed the IS25C32A/64A to be an efficient SPI EEPROM solution. The devices are packaged in 8-pin PDIP, 8-pin SOIC, and 8-pin TSSOP.

The functional features of the IS25C32A/64A allow them to be among the most advanced serial non-volatile memories available. Each device has a Chip-Select (CS) pin, and a 3-wire interface of Serial Data In (SI), Serial Data Out (SO), and Serial Clock (SCK). While the 3-wire interface of the IS25C32A/64A provides for high-speed access, a HOLD pin allows the memories to ignore the interface in a suspended state; later the HOLD pin re-activates communication without reinitializing the serial sequence. A Status Register facilitates a flexible write protection mechanism, and a device-ready bit (RDY).