X25650 Xicor, X25650 Datasheet

X25650

Manufacturer Part Number

X25650

Description

Manufacturer

Xicor

Datasheets

1.X25650.pdf (14 pages)

2.X25650.pdf (14 pages)

3.X25650.pdf (15 pages)

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FUNCTIONAL DIAGRAM

7037–1.5 6/19/97 T1/C0/D0 SH

Direct Write

FEATURES

•

64K

Xicor, Inc. 1994, 1995, 1996 Patents Pending

5MHz Clock Rate

Low Power CMOS

2.5V To 5.5V Power Supply

SPI Modes (0,0 & 1,1)

8K X 8 Bits

Block Lock™ Protection

Programmable Hardware Write Protection

Built-in Inadvertent Write Protection

Self-Timed Write Cycle

High Reliability

Packages

<5mA Active Current

<1 A Standby Current

32 Byte Page Mode

Protect 1/4, 1/2 or all of E

In-Circuit Programmable ROM Mode

Power-Up/Down protection circuitry

Write Enable Latch

Write Protect Pin

5ms Write Cycle Time (Typical)

Endurance: 100,000 cycles

Data Retention: 100 Years

ESD protection: 2000V on all pins

8-Lead SOIC

20-Lead TSSOP

and Block Lock

HOLD

SCK

5MHz SPI Serial E

Protection is a trademark of Xicor, Inc.

COMMAND

CONTROL

DECODE

ST ATUS

TIMING

WRITE

LOGIC

AND

PROM Array

PROTECT

WRITE

LOGIC

PROM with Block Lock

X25650

DESCRIPTION

The X25650 is a CMOS 65,536-bit serial E

internally organized as 8K x 8. The X25650 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.

The X25650 also features two additional inputs that

provide the end user with added ﬂexibility. By

asserting the HOLD input, the X25650 will ignore tran-

sitions on its inputs, thus allowing the host to service

higher priority interrupts. The WP input can be used as

a hardwire input to the X25650 disabling all write

attempts to the status register, thus providing a mech-

anism for limiting end user capability of altering 0, 1/4,

1/2 or all of the memory.

The X25650 utilizes Xicor’s proprietary Direct Write

cell, providing a minimum endurance of 100,000

cycles and a minimum data retention of 100 years.

X DECODE

LOGIC

128

DATA REGISTER

Y DECODE

128 X 256

8K BYTE

64 X 256

Protection

ARRAY

Characteristics subject to change without notice

7037 FRM F01

8K x 8 Bit

PROM,

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