DESCRIPTION
The X25128 is a CMOS 131,072-bit serial E2PROM, internally organized as 16K x 8. The X25128 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)
•16K X 8 Bits
—32 Byte Page Mode
•Low Power CMOS
—<1µA Standby Current
—<5mA Active Current
•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
•14-Lead SOIC Package
•16-Lead SOIC Package
•8-Lead PDIP Package