DS1556_10 Datasheet, PDF (2/18 Pages) Maxim Integrated Products – 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
PIN DESCRIPTION
A0–A16
- Address Input
DQ0–DQ7
IRQ/FT
RST
CE
OE
WE
- Data Input/Outputs
- Interrupt, Frequency Test Output (Open Drain)
- Power-On Reset Output (Open Drain)
- Chip Enable
- Output Enable
- Write Enable
V_CC
- Power Supply Input
GND
- Ground
N.C.
- No Connection
X1, X2
V_BAT
- Crystal Connection
- Battery Connection
ORDERING INFORMATION
PART
TEMP RANGE
VOLTAGE
(V)
PIN-PACKAGE
TOP MARK**
DS1556-70+
DS1556-70IND+
DS1556P-70+
DS1556P-70IND+
DS1556W-120+
DS1556W-120IND+
DS1556WP-120+
DS1556WP-120IND+
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
5.0
32 EDIP (0.740a)
DS1556+070
5.0
32 EDIP (0.740a)
DS1556+070 IND
5.0
34 PowerCap*
DS1556P+70
5.0
34 PowerCap*
DS1556P+70 IND
3.3
32 EDIP (0.740a)
DS1556W+120
3.3
32 EDIP (0.740a)
DS1556W+120 IND
3.3
34 PowerCap*
DS1556WP+120
3.3
34 PowerCap*
DS1556WP+120 IND
+Denotes a lead(Pb)-free/RoHS-compliant package.
*DS9034-PCX+ or DS9034I-PCX+ required (must be ordered separately).
**A “+” in top mark denotes a lead(Pb)-free device. An “IND” anywhere on the top mark indicates an industrial temperature grade device.
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