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