DS3030W Datasheet, PDF (10/18 Pages) Dallas Semiconductor – 3.3V Single-Piece 256kb Nonvolatile SRAM with Clock

3.3V Single-Piece 256kb Nonvolatile SRAM
with Clock
Functional Diagram
CS
CE
V_CC
GND
OE
WE
A0–A14
V_TP REF
32.768kHz
CS
A0–A3
WE
OE
REAL-TIME
CLOCK
DELAY TIMING
CIRCUITRY
CURRENT-LIMITING
RESISTOR
CHARGER
V_SW REF
REDUNDANT LOGIC
CURRENT-LIMITING
REDUNDANT
ML
RESISTOR
SERIES FET
BATTERY-CHARGING/SHORTING
PROTECTION CIRCUITRY (U.L. RECOGNIZED)
IRQ/FT
RST
UNINTERRUPTED
POWER SUPPLY
FOR THE SRAM
AND RTC
V_CC
CE
OE
SRAM
WE
DQ0–7
DS3030W
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