UPD4992 NEC, UPD4992 Datasheet
UPD4992
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UPD4992 Summary of contents
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... PRELIMINARY DATA SHEET 查询UPD4992供应商 查询UPD4992供应商 The PD4992 is a CMOS integrated circuit which outputs 8-bit parallel time and calendar data in a system in which a microprocessor is employed. The PD4992 operates at 32.768 kHz and provides year, month, day of month, day of week, hour, minute, and second data to a system ...
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PIN CONFIGURATION BLOCK DIAGRAM OSC OUT ...
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ABSOLUTE MAXIMUM RATINGS (V Item Symbol Supply voltage V Input voltage range V Output pin withstand voltage V OUT Low level output current I OUT (N ch Open Drain) Operating temperature range T opt Storage temperature range T ELECTRICAL CHARACTERISTICS ...
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WRITE CYCLE TIMING WAVEFORMS 1 ADDRESS OHZ D OUT D IN WRITE CYCLE TIMING WAVEFORMS 2 ( ADDRESS OUT ...
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READ CYCLE (unless otherwise specified V Item Symbol Cycle time t RC Address access time access time t ACS RD - output delay time output delay time t OLZ RD - output ...
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... Data input/output bus Address input to select internal register 1 Interval signal and timing pulse output (N ch open drain output) 19 Crystal resonator and capacitor are connected to these pins 2 5 Connect to GND ...
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REGISTER – ADDRESS CORRESPONDENCE TABLE ADDRESS HEX BIN 000B 10s second digit 1H 001B 10s minute digit 2H 010B 12/24H AM/PM 3H 011B Leap year control 4H 100B 10s day digit 5H 101B 10s month digit 6H ...
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... When TP enable is 1 (TP = DISABLE), the TP pin becomes high impedance (actually a high level because a pull up resistor is connected to the TP pin). But TP flag is not DISABLE in this case the OSC flag becomes 0 by oscillation stop, the OSC flag remains when oscillation is resumed. ...
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TIME COUNTER 1s second digit 10s seocnd digit 1s minute digit 10s minute digit 1s hour digit 10s hour digit Day of week digit Hour 24 hour mode AM 1 o’clock 01H AM 2 o’clock 02H AM 3 o’clock 03H ...
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TYPICAL INT CONTROL EXAMPLES (mode register: INT output mode) (1) Use of INT reset (example 1) T INT reset (2) Use of INT reset (example 2) T INT output INT reset (3) Use of INT stop (example 1) INT output ...
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Use of INT reset, INT stop t 1 INT output (6) Use of TP enable INT output T INT INT Clear stop reset INT stop DISABLE ENABLE PD4992 11 ...
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TP OUTPUT (mode register: TP output mode BUSY SIGNAL Internal counter 1 Hz Busy signal output The time and calendar data read out when BUSY signal is being output may not be correct. This is because, the ...
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OUTLINE DRAWING 20PIN PLASTIC DIP (300 mil NOTES 1) Each lead centerline is located within 0.25 mm (0.01 inch) of its true position (T.P.) at maximum material condition. 2) ltem "K" to ...
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PIN PLASTIC SOP (300 mil NOTE Each lead centerline is located within 0.12 mm (0.005 inch) of its true position (T.P.) at maximum material condition PD4992 detail ...
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RECOMMENDED SOLDERING CONDITIONS The following conditions (see table below) must be met when soldering this product. Please consult with our sales offices in case other soldering process is used case soldering is done under different conditions. TYPES OF ...
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... Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems or medical equipment for life support, etc. The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books. If customers intend to use NEC devices for applications other than those specified for Standard quality grade, they should contact an NEC sales representative in advance ...