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HT93LC66

CMOS 4K 3-Wire Serial EEPROM

Block Diagram

Pin Assignment

Rev. 1.20 1 October 29, 2001

Features

Operating voltage V

Read: 2.0V~5.5V

Write: 2.4V~5.5V

Low power consumption

Operating: 5mA max.

Standby: 10mA max.

User selectable internal organization

4K(HT93LC66): 512´8or256´16

3-wire Serial Interface

Write cycle time: 5ms max.

Automatic erase-before-write operation

Word/chip erase and write operation

Write operation with built-in timer

Software controlled write protection

10-year data retention after 100K rewrite cycles

rewrite cycles per word

Commercial temperature range (0°Cto+70°C)

8-pin DIP/SOP package

General Description

The HT93LC66 is a 4K-bit low voltage nonvolatile, serial

electrically erasable programmable read only memory de

vice using the CMOS floating gate process. Its 4096 bits of

memory are organized into 256 words of 16 bits each

when the ORG pin is connected to VCC or organized into

512 words of 8 bits each when it is tied to VSS. The device

is optimized for use in many industrial and commercial ap

plications where low power and low voltage operation are

essential. By popular microcontroller, the versatile serial

interface including chip select (CS), serial clock (SK), data

input (DI) and data output (DO) can be easily controlled.

M e m o ry C e ll

Array

4K: (512

8 or 256

16)

C ontrol

Logic

and

Clock

G enerator

Data

R egister

Address

R egister

VCC

VSS

Address

D ecoder

O utput

B u ffe r

ORG

VCC

ORG

VSS

SK DI

VCC

ORG

VSS

HT93LC66

8 D IP -A /S O P -A

HT93LC66

8 S O P -B

1 2 3 4 5 6 7

HT93LC66 1

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Página 1 - HT93LC66

HT93LC66CMOS 4K 3-Wire Serial EEPROMBlock DiagramPin AssignmentRev. 1.20 1 October 29, 2001Features·Operating voltage VCC-Read: 2.0V~5.5V-Write: 2.4V~

Página 2

Pin DescriptionPin Name I/O DescriptionCS I Chip select inputSK I Serial clock inputDI I Serial data inputDO O Serial data outputVSS¾Negative power su

Página 3

A.C. CharacteristicsSymbol ParameterVCC=5V±10% VCC=3V±10%VCC=2V*UnitMin. Max. Min. Max. Min. Max.fSKClock Frequency 0 2000 0 500 0 250 kHztSKHSK High

Página 4

HT93LC66Rev. 1.20 4 October 29, 2001Functional DescriptionThe HT93LC66 is accessed via a three-wire serial com-munication interface. The device is arr

Página 5

Timing DiagramsREADEWEN/EWDSWRITEERASEHT93LC66Rev. 1.20 5 October 29, 2001CSSKStandbyDI0(1 )0Start bit11=E W EN00=E W D SCSSKDOH igh-Z H igh Z0DIStart

Página 6

ERALWRALInstruction Set SummaryHT93LC66Instruction CommentsStartbitOpCodeAddressORG=0 ORG=1X8 X16DataORG=0 ORG=1X8 X16READ Read data 1 10 A8~A0 A7~A0

Página 7

HT93LC66Rev. 1.20 7 October 29, 2001Copyright Ó 2001 by HOLTEK SEMICONDUCTOR INC.The information appearing in this Data Sheet is believed to be accura

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Rainbow-electronics HT93LC66 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Armazenamento Rainbow-electronics HT93LC66. Rainbow Electronics HT93LC66 User Manual Manual do Utilizador

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