(China (Mainland))
Product Summary
The UPD4991AGS is a CMOS integrated circuit that has the ability to input/output 4-bit parallel time data and calendar data to/from a microcomputer and includes an alarm function. The reference oscillation frequency of UPD4991AGS is 32.768 kHz. Hour, minute, second, year, month, day, and date data is stored internally.
Parametrics
UPD4991AGS absolute maximum ratings: (1)Supply Voltage VPP: –0.3 to 7.0 V; (2)Input Voltage Range VIN: –0.3 to VPP + 0.3 V; (3)Output Pin Breakdown Voltage VOUT: 7.0 V; (4)Low-Level Output Current: 30 mA; (5)Operating Ambient Temperature Topt: –40 to +85 ℃; (6)Storage Temperature Tstg: –65 to +125 ℃.
Features
UPD4991AGS features: (1)Time (hour, minute, and second) and calendar (leap year, year, month, day, and date) counters; (2)Leap year can be automatically identified or set; (3)12- and 24-hour modes selectable; (4)4-bit parallel input/output in BCD data format; (5)Alarm function (hour, minute, second, month, day, date); (6)One of 0.1, 1.0, 10, 30, and 60-s interval timer outputs selectable; (7)One of 2048, 1024, 64, 16, 1 Hz, 1-pulse output, and H to L output selectable as alarm coincidence output; (8)Upward compatible with mPD4991; (9)Low power consumption: 2 mA typ. (VDD = 2.4 V).
Diagrams
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