DS3050W Datasheet, PDF (10/18 Pages) Maxim Integrated Products – 3.3V Single-Piece 4Mb Nonvolatile SRAM with Clock

3.3V Single-Piece 4Mb Nonvolatile SRAM
with Clock
Functional Diagram
CS
CE
V_CC
GND
OE
WE
A0–A18
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
DS3050W
10 ____________________________________________________________________