DESCRIPTION

The X25320 is a CMOS 32768-bit serial E2PROM, internally organized as 4K x 8. The X25320 features a Serial Peripheral Interface (SPI) and software protocol allowing operation on a simple three-wire bus. The bus signals 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, allowing any number of devices to share the same bus.

FEATURES

? 2MHz Clock Rate

? SPI Modes (0,0 & 1,1)

? 4K X 8 Bits

— 32 Byte Page Mode

? Low Power CMOS

—<1μA Standby Current

— <5mA Active Current During Write

? 2.7V To 5.5V Power Supply

? Block Lock Protection

— Protect 1/4, 1/2 or all of E2PROM Array

? Built-in Inadvertent Write Protection

— Power-Up/Power-Down protection circuitry

— Write Enable Latch

— Write Protect Pin

? Self-Timed Write Cycle

— 5ms Write Cycle Time (Typical)

? High Reliability

— Endurance: 100,000 cycles

— Data Retention: 100 Years

— ESD protection: 2000V on all pins

? 8-Lead PDlP Package

? 8-Lead SOIC Package

? 14-Lead TSSOP Package