DESCRIPTION

The X25020 is a CMOS 2048-bit serial E2PROM, internally organized as 256 x 8. The X25020 features a serial interface 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

• 1MHz Clock Rate

• SPI Modes (0,0 & 1,1)

• 256 X 8 Bits

   —4 Byte Page Mode

• Low Power CMOS

   —10µA Standby Current

   —3mA Active Write 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 Latch

   —Write Protect Pin

• Self-Timed Write Cycle

   —5ms Write Cycle Time (Typical)

• High Reliability

   —Endurance: 100,000 cycles per byte

   —Data Retention: 100 Years

   —ESD protection: 2000V on all pins

• 8-Lead PDlP Package

• 8-Lead SOIC Package