Description
PIN NAME
FUNCTION
1 A7
2 A6
3 A5
4 A4
5 A3
6 A2 Address Input
7 A1
8 A0
19 A10
22 A9
23 A8
9 DQ0
10 DQ1
11 DQ2
13 14
DQ3 DQ4
Data Input/Output
15 DQ5
16 DQ6
17 DQ7
12 GND Ground 18 CE Active-Low Chip-Enable Input 20 OE Active-Low Output-Enable Input 21 WE Active-Low Write-Enab
Features
- Integrated NV SRAM, Real-Time Clock,
Crystal, Power-Fail Control Circuit, and
Lithium Energy Source.
- Standard JEDEC Bytewide 2k x 8 Static
RAM Pinout.
- Clock Registers are Accessed Identically to
the Static RAM. These Registers are
Resident in the Eight Top RAM Locations.
- Totally Nonvolatile with Over 10 Years of
Operation in the Absence of Power.
- Access Times of 85ns and 100ns.
- Quartz Accuracy ±1 Minute a Month at
+25°C, Factory Calibrated.
- BCD-Coded Year, Mon.
DS1642 Datasheet
