DS2223 Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated
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DS2223 Datasheet PDF : 10 Pages
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DS2223/DS2224
DS2223/DS2224
EconoRAM
FEATURES
• Low–cost, general–purpose, 256–bit memory
– DS2223 has 256–bit SRAM
– DS2224 has 32–bit ROM, 224–bit SRAM
• 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
PACKAGE OUTLINE
TO–92
12 3
SOT–223
1
123
BOTTOM VIEW
See Mech. Drawings
Section
24 3
TOP VIEW
See Mech. Drawings
Section
PIN CONNECTIONS
Pin 1 GND – Ground
Pin 2 DQ
– Data In/Out
Pin 3
Pin 4
VCC
GND
– Supply
– Ground
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.
ORDERING INFORMATION
DS2223
DS2223Z
DS2223T
DS2223Y
DS2224
DS2224Z
DS2224T
DS2224Y
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
020698 1/10
1
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