©Xicor, Inc. 1994, 1995, 1996 Patents Pending

7007-0.7 5/8/97 T1/C0/D0 SH

1

Characteristics subject to change without notice

8K

X25F087

1024 x 8 Bit

FEATURES

• 1MHz Clock Rate

• SPI Modes (0,0 & 1,1)

• 1024 x 8 Bits

—16 Byte Small Sector Program Mode

• Low Power CMOS

—<1

µA Standby Current

—<3mA Active Current during Program

—<400

µA Active Current during Read

• 1.8V to 3.6V or 5V “Univolt” Read and Program

Power Supply Versions

• Block Lock Protection

—Block Lock Protect 0, any 1/4, 1st 1/2, First or

Last Sector of SerialFlash Array

• Built-in Inadvertent Program Protection

—Power-Up/Power-Down Protection Circuitry

—Program Enable Latch

—Program Protect Pin

• Self-Timed Program Cycle

—5ms Program Cycle Time (Typical)

• High Reliability

—Endurance: 100,000 Cycles/Byte

—Data Retention: 100 Years

—ESD: 2000V on all pins

• 8-Lead SOIC Package

• 8-Lead TSSOP Package

• 8-Pin Mini-DIP Package

DESCRIPTION

The X25F087 is a CMOS 8k-bit SerialFlash, internally

organized as 1024 x 8. The X25F087 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.

There are eight options for programmable, nonvolatile,

Block Lock Protection available to the end user. These

options are implemented via special instructions

programmed to the part. The X25F087 also features a

PP pin that can be used for hardwire protection of the

part, disabling all programming attempts, as well as a

Program Enable Latch that must be set before a program

operation can be initiated.

cell, providing a minimum endurance of 100,000 cycles

per sector and a minimum data retention of 100 years.

FUNCTIONAL DIAGRAM

COMMAND

DECODE

AND

CONTROL

LOGIC

PROGRAM CONTROL LOGIC

DATA REGISTER

Y DECODE LOGIC

X

DECODE

LOGIC

HIGH VOLTAGE

CONTROL

SERIALFLASH

ARRAY

(1024 x 8)

SO

SI

SCK

CS

PP

8

16

32

7007 FRM 01