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DESCRIPTION

The X25057 is a CMOS 4K-bit serial E2PROM, internally organized as 512 x 8. The X25057 features a Serial Peripheral Interface (SPI) and software protocol allowing operation on a simple four-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

? 5MHz Clock Rate

? IDLock? Memory

—IDLock First or Last Page, Any 1/4 or Lower 1/2 of E2PROM Array

? Low Power CMOS

—<1∝A Standby Current

—<3mA Active Current during Write

—<400∝A Active Current during Read

? 1.8V to 3.6V, 2.7V-5.5V or 4.5V to 5.5V Operation

? Built-in Inadvertent Write Protection

—Power-Up/Power-Down Protection Circuitry — Write Enable Latch

—Write Protect Pin

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

? 512 x 8 Bits

—16 Byte Page Mode

? Self-Timed Write Cycle

—5ms Write Cycle Time (Typical)

? High Reliability

—Endurance: 100,000 Cycles/Byte

—Data Retention: 100 Years

—ESD: 2000V on all pins

? 8-Lead MSOP Package

? 8-Lead TSSOP Package

? 8-Lead SOIC Package

? 8-Lead PDIP Package