X25080

1

8K

X25080

1K x 8 Bit

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

Characteristics subject to change without notice

3090-1.7 6/11/96 T3/C1/D0 NS

Direct Write™ and Block Lock™ Protection is a trademark of Xicor, Inc.

FEATURES

• 2MHz Clock Rate

• SPI Modes (0,0 & 1,1)

• 1K X 8 Bits

— 32 Byte Page Mode

• Low Power CMOS

—<1

— <5mA Active Current

• 2.7V To 5.5V Power Supply

• Block Lock Protection

• 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

DESCRIPTION

internally organized as 1K x 8. The X25080 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 con-

trolled through a chip select (

CS) input, allowing any

number of devices to share the same bus.

The X25080 also features two additional inputs that

provide the end user with added flexibility. By asserting

the

HOLD input, the X25080 will ignore transitions on its

inputs, thus allowing the host to service higher priority

interrupts. The

WP input can be used as a hardwire input

to the X25080 disabling all write attempts to the status

register, thus providing a mechanism for limiting end

user capability of altering 0, 1/4, 1/2 or all of the memory.

The X25080 utilizes Xicor’s proprietary Direct Write™

cell, providing a minimum endurance of 100,000 cycles

and a minimum data retention of 100 years.

FUNCTIONAL DIAGRAM

COMMAND

DECODE

AND

CONTROL

LOGIC

WRITE

CONTROL

AND

TIMING

LOGIC

WRITE

PROTECT

LOGIC

X DECODE

LOGIC

1K BYTE

ARRAY

8 X 256

Y DECODE

DATA REGISTER

SO

SI

SCK

CS

HOLD

WP

8

16

8

32

STATUS

REGISTER

8

16 X 256

8 X 256

3090 ILL F01

A V AILABLE

AN61