UPD4990A NEC, UPD4990A Datasheet
UPD4990A
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UPD4990A Summary of contents
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... Commands can be set by inputting serial data. • Selective timing pulses (TPs) are 64 Hz, 256 Hz, 2 048 Hz, and 4 096 Hz and selective output intervals are 1, 10, 30, and 60 seconds. ORDERING INFORMATION PART No. PD4990AC 14-pin plastic DIP (300 mil) PD4990AG 16-pin plastic SOP (300 mil) CONNECTION DIAGRAM (Top View ...
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ABSOLUTE MAXIMUM RATINGS Supply Voltage Input Voltage Operating Temperature Range Storage Temperature Range Output Terminal Voltage ELECTRICAL CHARACTERISTICS (f = 32.768 kHz, C CHARACTERISTIC SYMBOL Operating Voltage Current Consumption I DD Low Level Output Voltage V OL ...
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OE CLK CLK DATA COMMAND IN Register CLK TAL OSC X TAL Select signal generator circuit ...
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... Each command is latched with STB (strobe). Chip select Connecting the CS pin to the ground level inhibits CLK and STB inputs. Data output inhibition Connecting the OUT ENBL pin to the ground level sets the DATA OUT pin at high impedance. MSB command Ten's of Unit of ...
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TERMINALS Input terminals DATA IN Data input of 40-/52-bit shift register CLK Shift clock input of 40-/52-bit shift register Command input (3 bit STB Strobe input CS Chip select input (Prohibits CLK ...
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... interval set (counter reset & start interval set (counter reset & start interval set (counter reset & start interval set (counter reset & start) Interval Output Flag Reset Interval Timer Clock Run Interval Timer Clock Stop TEST MODE SET , C , and C pins should be connected PD4990A pin. DD ...
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Command input (1) 3-bit binary code input (2) 4-bit serial transfer command input: C Number of commands Register control TP select TP control Test mode set Commands ( ...
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TP selection and control [ Set Mode [ [ (50 % duty) is output to the TP pin The year ...
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Interval output function An interrupt signal can be output by selecting an output from TP. Interrupt signals are output repeatedly at specified intervals until their output is suppressed by a command. Only output flags can be reset to operate the ...
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Test mode In the test mode, data is output to the DATA OUT pin regardless of whether data has been input to OUT ENBL. There are two different test modes depending on the OUT ENBL data. (1) Test mode 1 ...
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TIMING DIAGRAM FOR SETTING COMMANDS ( DATA DSU V IH CLK V IL STB Other than time read mode NEW COMMAND OLD MODE VALID Time read mode OLD MODE V ...
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TIMING DIAGRAM FOR SETTING COMMANDS (C CAN CHANGE STB CLK V IL Other than time read mode NEW COMMAND OLD MODE VALID Time read mode OLD MODE V ...
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DATA INPUT/OUTPUT TIMING DIAGRAM CLK "1" s. "10" s. DATA IN OUT ENBL "1" s. "10" s. DATA OUT 1011 Note: Reading-in timing of CPU (Trailing edge of CLK). TIMING ...
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POWER SUPPLY CIRCUIT 1SS53 2SA733 + 510 2SC945 4.7 k GND 14 PD4990A 1SS53 DIN Ni Cd CLK 3.6 V STB TAL ...
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APPLICATION + CLK RESET PD4175BC Power Supply Circuit 10 k DATA BUS WR ...
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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) Item "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 PD4990A detail 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 ...