DS12885 Datasheet, PDF (2/4 Pages) Dallas Semiconductor – Real-Time Clock

DS12885/DS12885Q/DS12885T
DESCRIPTION
The DS12885 real-time clock plus RAM is designed to be a direct replacement for the DS1285. The
DS12885 is identical in form, fit, and function to the DS1285, and has an additional 64 bytes of general
purpose RAM. Access to this additional RAM space is determined by the logic level presented on AD6
during the address portion of an access cycle. An external crystal and battery are the only components
required to maintain time-of-day and memory status in the absence of power. For a complete description
of operating conditions, electrical characteristics, bus timing, and pin descriptions other than X1, X2,
V_BAT, and RCLR , see the DS12887 data sheet.
TYPICAL OPERATING CIRCUIT
ORDERING INFORMATION
PART
DS12885
DS12885N
DS12885S
DS12885N
DS12885Q
DS12885QN
DS12885Q/T&R
DS12885T
DS12885TN
DS12885T/T&R
PIN-PACKAGE
24 DIP
24 DIP
24 SO
24 SO
28 PLCC
28 PLCC
28 PLCC/Tape and Reel
32 TQFP
32 TQFP
32 TQFP/Tape and Reel
TEMP RANGE
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
0°C to +70°C
-40°C to +85°C
0°C to +70°C
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