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DS2224Z Datasheet

  • DS2224Z

  • EconoRAM

  • 10頁

  • DALLAS   DALLAS

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DS2223/DS2224
DS2223/DS2224
EconoRAM
FEATURES
PACKAGE OUTLINE
TO鈥?2
鈥?/div>
Low鈥揷ost, general鈥損urpose, 256鈥揵it memory
鈥?DS2223 has 256鈥揵it SRAM
鈥?DS2224 has 32鈥揵it ROM, 224鈥揵it SRAM
鈥?/div>
Reduces
single pin
control, address and data interface to a
鈥?/div>
Each DS2224 32鈥揵it ROM is factory鈥搇asered with a
unique serial number
鈥?/div>
DS2224 portion of ROM with custom code and unique
serial number available
SOT鈥?23
1
1
2
3
鈥?/div>
Minimal
operating power: 45 nanocoulombs per
transaction @1.5V typical
鈥?/div>
Less than 15 nA standby current at 25擄C
鈥?/div>
Nonvolatile data
1
2
3
2
BOTTOM VIEW
See Mech. Drawings
Section
4
3
retention easily achieved via low鈥?/div>
cost alkaline batteries or capacitors
lers
鈥?/div>
Directly connects to a port pin of popular microcontrol-
鈥?/div>
Operation from 1.2 to 5.5 volts
鈥?/div>
Popular TO鈥?2 or SOT鈥?23 surface mount package
鈥?/div>
Operates over industrial temperature range 鈥?0擄C to
+85擄C
TOP VIEW
See Mech. Drawings
Section
PIN CONNECTIONS
Pin 1
Pin 2
Pin 3
Pin 4
GND
DQ
V
CC
GND
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Ground
Data In/Out
Supply
Ground
DESCRIPTION
The DS2223 and DS2224 EconoRAMs are fully static,
micro鈥損owered, read/write memories in low鈥揷ost
TO鈥?2 or SOT鈥?23 packages. The DS2223 is orga-
nized as a serial 256 x 1 bit static read/write memory.
The DS2224鈥檚 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.
ORDERING INFORMATION
DS2223
DS2223Z
DS2223T
DS2223Y
DS2224
DS2224Z
DS2224T
DS2224Y
256鈥揵it SRAM 鈥?TO鈥?2 Package
256鈥揵it SRAM 鈥?SOT鈥?23 Package
1000 piece tape鈥揳nd鈥搑eel of DS2223
2500 piece tape鈥揳nd鈥搑eel of DS2223Z
32鈥揵it serial number (ROM), 224鈥揵it
SRAM 鈥?TO鈥?2 Package
32鈥揵it serial number (ROM), 224鈥揵it
SRAM 鈥?SOT鈥?23 Package
1000 piece tape鈥揳nd鈥搑eel of DS2224
2500 piece tape鈥揳nd鈥搑eel of DS2224Z
080598 1/10

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