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DESCRIPTION

The X25138 is a CMOS 128K-bit serial E2PROM, internally organized as 16K x 8. The X25138 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

? 5MHz Clock Rate

? Low Power CMOS

<1mA Standby Current

<5mA Active Current

? 2.5V To 5.5V Power Supply

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

? 16K X 8 Bits

32 Byte Page Mode

? Block Lock? Protection

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

? Programmable Hardware Write Protection

In-Circuit Programmable ROM Mode

? Built-in Inadvertent Write Protection

Power-Up/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

? Packages

8-Lead XBGA

8, 14-Lead SOIC

8-Lead PDIP

8-Lead TSSOP