UPD4704G NEC, UPD4704G Datasheet
UPD4704G
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UPD4704G Summary of contents
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EXTENSION 8-BIT UP/DOWN COUNTER DESCRIPTION The PD4704 is 8-bit up/down counters for extension of the PD4702 incremental encoder counter. They perform an up/down-count using an 8-bit width with a PD4702 carry or borrow signal as input. In addition, a carry ...
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BLOCK DIAGRAM Reset A Discrimination Edge Detection B PIN FUNCTIONS Pin Name Input/Output Up Input Down D Output (3-state) Carry Output Borrow Output RESET Input (Schmitt) OE Input STB Input V DD GND 2 Phase 8-Bit Up/Down ...
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TRUTH TABLE 1 (COUNTER BLOCK) UP DOWN RESET TRUTH TABLE 2 (LATCH & OUTPUT BLOCKS) STB OE H Output disable (3-state) L Output ...
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... UP input or DOWN input. If the PD4704 used alone, without being connected to the PD4702, either UP or the DOWN must be "H" count pulse is input DOWN while the other is "L", the count value may change. ...
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Fig. 2 Relation Between STB Timing and Counter Value UP/DOWN STB Pre-count value latched UP/DOWN t RESET STB (3) Carry & borrow outputs If the counter performs an up-count operation when the count value is 0FF Carry output (the pulse ...
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... As the PD4704 incorporates an 8-bit counter, a large transient current flows in the case of a count value which changes all the bits (such as 00 0FF H power supply line is sufficiently low therefore recommended that a decoupling capacitor (of around 0 connected between V and V right next to the IC as shown in Fig ...
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ABSOLUTE MAXIMUM RATINGS (T A PARAMETER SYMBOL Supply voltage V DD Input voltage V I Output voltage V O Operating temperature T opt Storage temperature T stg Permissible loss CHARACTERISTICS (T = – ...
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AC Timings t PWUDL UP/DOWN RESET UP/DOWN t DRSCD Hi-Z CD – STB Fig. 3 Carry/Borrow Signal Output Timing UP/DOWN Carry Borrow UP/DOWN STB 8 Fig. 1 Up/Down Signal Input Timing t CYCT t PWUDH t SUDM ...
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... Timing measurement is performed at 1 state output OE 1 DOECD 1.5 V Output 1.5 V Measurement Conditions A, B inputs MHz STB input connected input connected Load on all outputs pF Output t DFOECD Output PD4704 ...
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Sample Application Circuits 16-bit counter Incremental Rotary Encoder RESET The application circuits and their parameters are for references only and are not intended for use in actual design-in' Carry UP B Borrow ...
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... Wave soldering Solder temperature: 260 C or below, Flow time: 10 seconds or below REFERENCE NEC semiconductor device reliability/quality control system Quality grade on NEC semiconductor devices Semiconductor device mounting technology manual Semiconductor device package manual Guide to quality assurance for semiconductor devices Semiconductor selection guide ...
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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) ltem "K" to center of ...
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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 PD4704 detail of ...
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PD4704 ...
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PD4704 15 ...
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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 ...