Datasheet

DS1554 256k, Nonvolatile, Y2K-Compliant Timekeeping RAM
2 of 18
PIN DESCRIPTION
A0–A14 - Address Inputs
DQ0–DQ7 - Data Input/Outputs
IRQ/FT - Interrupt, Frequency Test Output (Open Drain)
RST - Power-On Reset Output (Open Drain)
CE - Chip Enable
OE - Output Enable
WE - Write Enable
V
CC
- Power-Supply Input
GND - Ground
N.C. - No Connection
X1, X2 - Crystal Connection
V
BAT
- Battery Connection
ORDERING INFORMATION
PART TEMP RANGE
VOLTAGE
(V)
PIN-PACKAGE TOP MARK**
DS1554-70+ 0°C to +70°C 5.0 32 EDIP (0.740a) DS1554+070
DS1554-70IND+ -40°C to +85°C 5.0 32 EDIP (0.740a) DS1554+070 IND
DS1554P-70+ 0°C to +70°C 5.0 34 PowerCap* DS1554P+70
DS1554P-70IND+ -40°C to +85°C 5.0 34 PowerCap* DS1554P+70 IND
DS1554W-120+ 0°C to +70°C 3.3 32 EDIP (0.740a) DS1554W+120
DS1554W-120IND+ -40°C to +85°C 3.3 32 EDIP (0.740a) DS1554W+120 IND
DS1554WP-120+ 0°C to +70°C 3.3 34 PowerCap* DS1554WP+120
DS1554WP-120IND+ -40°C to +85°C 3.3 34 PowerCap* DS1554WP+120 IND
+Denotes a lead(Pb)-free /RoHS-compliant package.
*DS9034-PCX+ or DS9034I-PCX+ required (must be ordered separately).
**The top mark will include a “+” on lead-free devices. An “IND” anywhere on the top mark indicates an industrial temperature grade device.