DS2224Z Dallas Semiconductor, DS2224Z Datasheet

DS2224Z

Manufacturer Part Number

DS2224Z

Description

Manufacturer

Dallas Semiconductor

Datasheets

1.DS2224Z.pdf (10 pages)

2.DS2224Z.pdf (10 pages)

Specifications of DS2224Z

Case

TSOC

Date_code

07+

Current page: 1 of 10
Download datasheet (103Kb)

FEATURES

DESCRIPTION

The DS2223 and DS2224 EconoRAMs are fully static,

micro–powered, read/write memories in low–cost

TO–92 or SOT–223 packages. The DS2223 is orga-

nized as a serial 256 x 1 bit static read/write memory.

The DS2224’s first 32 bits are lasered with a unique ID

code at the time of manufacture; the remaining 224 bits

are static read/write memory. Signaling necessary for

reading or writing is reduced to just one interface lead.

Both the DS2223 and DS2224 are not recommended

for new designs. However, the parts will remain avail-

able until the year 2003, at least.

Low–cost, general–purpose, 256–bit memory

Reduces control, address and data interface to a

single pin

Each DS2224 32–bit ROM is factory–lasered with a

unique serial number

DS2224 portion of ROM with custom code and unique

serial number available

Minimal operating power: 45 nanocoulombs per

transaction @1.5V typical

Less than 15 nA standby current at 25 C

Nonvolatile data retention easily achieved via low–

cost alkaline batteries or capacitors

Directly connects to a port pin of popular microcontrol-

lers

Operation from 1.2 to 5.5 volts

Popular TO–92 or SOT–223 surface mount package

Operates over industrial temperature range –40 C to

+85 C

– DS2223 has 256–bit SRAM

– DS2224 has 32–bit ROM, 224–bit SRAM

PACKAGE OUTLINE

PIN CONNECTIONS

Pin 1

Pin 2

Pin 3

Pin 4

ORDERING INFORMATION

DS2223

DS2223Z

DS2223T

DS2223Y

DS2224

DS2224Z

DS2224T

DS2224Y

See Mech. Drawings

BOTTOM VIEW

Section

TO–92

GND

2 3

256–bit SRAM – TO–92 Package

256–bit SRAM – SOT–223 Package

1000 piece tape–and–reel of DS2223

2500 piece tape–and–reel of DS2223Z

32–bit serial number (ROM), 224–bit

SRAM – TO–92 Package

32–bit serial number (ROM), 224–bit

SRAM – SOT–223 Package

1000 piece tape–and–reel of DS2224

2500 piece tape–and–reel of DS2224Z

– Ground

– Data In/Out

– Supply

– Ground

DS2223/DS2224

See Mech. Drawings

EconoRAM

TOP VIEW

SOT–223

Section

DS2223/DS2224

080598 1/10

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