X84641S8 Xicor, X84641S8 Datasheet

X84641S8

Manufacturer Part Number

X84641S8

Description

Manufacturer

Xicor

Datasheet

1.X84641S8.pdf (17 pages)

Current page: 1 of 17
Download datasheet (173Kb)

BLOCK DIAGRAM

16K/64K

FEATURES

• Up to 10MHz data transfer rate

• 25ns Read Access Time

• Direct interface to microprocessors and micro-

• Low power CMOS

• Byte or page write capable

• Typical nonvolatile write cycle time: 2ms

• High reliability

• Small packages options

REV 1.0 6/30/00

controllers

—Eliminates I/O port requirements

—No interface glue logic required

—Eliminates need for parallel to serial converters

—2.5V–5.5V and 5V 10% versions

—Standby current less than 1µA

—Active current less than 1mA

—32-byte page write mode

—100,000 endurance cycles

—Guaranteed data retention: 100 years

—8-lead mini-DIP package

—8-lead SOIC package

—8, 20-lead TSSOP package

Ports

Saved

AN95 • AN103 • AN107

A V A I L A B L E

PPLICATION

System Connection

P0/CS

P1/CLK

P2/DI

P3/DO

ASIC

RISC

DSP

µC

µP

OTE

µPort Saver EEPROM

X84161/641

www.xicor.com

DESCRIPTION

The µPort Saver memories need no serial ports or

special hardware and connect to the processor mem-

ory bus. Replacing bytewide data memory, the µPort

Saver uses bytewide memory control functions, takes

a fraction of the board space and consumes much less

power. Replacing serial memories, the µPort Saver

provides all the serial beneﬁts, such as low cost, low

power, low voltage, and small package size, while

releasing I/Os for more important uses.

The µPort Saver memory outputs data within 25ns of

an active read signal. This is less than the read access

time of most hosts and provides “no-wait-state” opera-

tion. This prevents bottlenecks on the bus. With rates

to 10MHz, the µPort Saver supplies data faster than

required by most host read cycle speciﬁcations. This

eliminates the need for software NOPs.

The µPort Saver memories communicate over one line

of the data bus using a sequence of standard bus read

and write operations. This “bit serial” interface allows

the µPort Saver to work well in 8-bit, 16-bit, 32-bit, and

64-bit systems.

A Write Protect (WP) pin prevents inadvertent writes to

the memory.

Xicor EEPROMs are designed and tested for applica-

tions requiring extended endurance. Inherent data

retention is greater than 100 years.

I/O

Command

Decode

Control

Logic

and

Characteristics subject to change without notice.

Internal Block Diagram

DEC

MPS

Timing & Control

H.V. Generation

Data Register

™

EEPROM

Y Decode

8K x 8

2K x 8

Array

EEPROM

1 of 17

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