DS1645Y
FEATURES
- 10 years minimum data retention in the absence of external power
- Data is automatically protected during power loss
- Directly replaces 128K x 8 volatile static RAM
- Write protects selected blocks of memory when pro- grammed
- Unlimited write cycles
- Low- power CMOS
- Read and write access times as fast as 70 ns
- Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
- Full +10% VCC operating range (DS1645Y)
- Optional +5% VCC operating range (DS1645AB)
- Optional industrial temperature range of
- 40°C to
+85°C, designated IND
- JEDEC standard 32- pin DIP package
- Low Profile Module (LPM) package
- Fits into standard 68- pin PLCC surface mountable socket
- 250 mil package height
- Power Fail Output (PFO) warns system of impending VCC power failure
PIN ASSIGNMENT
NC A16 A14 A12
A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND
1 2...
