DS2223/DS2224

EconoRAM

DS2223/DS2224

080598 1/10

FEATURES

– DS2223 has 256–bit SRAM

– DS2224 has 32–bit ROM, 224–bit SRAM

single pin

unique serial number

serial number available

transaction @1.5V typical

cost alkaline batteries or capacitors

lers

+85

°C

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.

PACKAGE OUTLINE

12

3

1

23

1

23

4

SOT–223

TOP VIEW

BOTTOM VIEW

TO–92

See Mech. Drawings

Section

See Mech. Drawings

Section

PIN CONNECTIONS

Pin 1

GND

– Ground

Pin 2

DQ

– Data In/Out

Pin 3

– Supply

Pin 4

GND

– Ground

ORDERING INFORMATION

DS2223

256–bit SRAM – TO–92 Package

DS2223Z

256–bit SRAM – SOT–223 Package

DS2223T

1000 piece tape–and–reel of DS2223

DS2223Y

2500 piece tape–and–reel of DS2223Z

DS2224

32–bit serial number (ROM), 224–bit

SRAM – TO–92 Package

DS2224Z

32–bit serial number (ROM), 224–bit

SRAM – SOT–223 Package

DS2224T

1000 piece tape–and–reel of DS2224

DS2224Y

2500 piece tape–and–reel of DS2224Z