X25401 Xicor, X25401 Datasheet

X25401

Manufacturer Part Number

X25401

Description

Manufacturer

Xicor

Datasheet

1.X25401.pdf (14 pages)

Specifications of X25401

Case

SOP8

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

X25401P

Manufacturer:

Quantity:

231

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2051-1.5 8/1/97 T0/C0/D2 SH

X25401

256 Bit

FEATURES

•

FUNCTIONAL DIAGRAM

AUTOSTORE™ NOVRAM is a trademark of Xicor, Inc.

COPS is a trademark of National Semiconductor Corp.

1MHz Clock Rate

AUTOSTORE™ NOVRAM

—Automatically Performs a Store Operation

Single 5 Volt Supply

Ideal for use with Single Chip Microcomputers

—Minimum I/O Interface

—SPI Mode (0,0 & 1,1) Serial Port Compatible

—Easily Interfaced to Microcontroller Ports

Software and Hardware Control of Nonvolatile

Functions

Auto Recall on Power-Up

TTL and CMOS Compatible

Low Power Dissipation

—Active Current: 10mA

—Standby Current: 50 A

8-Lead PDIP and 8-Lead SOIC Packages

High Reliability

—Store Cycles: 1,000,000

—Data Retention: 100 Years

Upon Loss of V

A V A I L A B L E

SCK (2)

CS (1)

SI (3)

PPLICATION

AN56

INSTRUCTION

DECODE

OTE

INSTRUCTION

SPI Serial AUTOSTORE™ NOVRAM

DECODE

ROW

COUNTER

4-BIT

X25401

COLUMN

DECODE

STATIC

256-BIT

RAM

DESCRIPTION

The Xicor X25401 is a serial 256 bit NOVRAM featuring

a static RAM configured 16 x 16, overlaid bit-by-bit with

a nonvolatile E

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 Xicor NOVRAM design allows data to be transferred

between the two memory arrays by means of software

commands or external hardware inputs. A store opera-

tion (RAM data to E

and a recall operation (E

pleted in 2 s or less.

The X25401 also includes the AUTOSTORE feature, a

user selectable feature that automatically performs a

store operation when V

Xicor NOVRAMs are designed for unlimited write opera-

tions to RAM, either from the host or recalls from E

and a minimum 1,000,000 store operations. Inherent data

retention is specified to be greater than 100 years.

NONVOLATILE

PROM

PROM array. The X25401 features a

PROM) is completed in 5ms or less

CONTROL

LOGIC

falls below a preset threshold.

Characteristics subject to change without notice

PROM data to RAM) is com-

2051 FHD F01

RECALL (6)

AS (7)

SO (4)

16 x 16 Bit

PROM

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