UPD4721 NEC, UPD4721 Datasheet
UPD4721
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UPD4721 Summary of contents
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... E standard. The internal DC/DC converter can switch between multiple voltages, realizing the allowing it to operate with a single +3 power supply. It also provides standby function. This IC incorporates 2 driver circuits and 2 receiver circuits. An RS-232 interface circuit can be easily configured by connecting 5 capacitors externally. FEATURES • Conforms to EIA/TIA-232-E (former name, RS-232C) standards • ...
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... The pull-up resistors at driver input are active resistors GND 19 1 – – STBY 5 – Note 4 300 14 D 300 5 5 not necessary. 5 PD4721 + –10 V CHA OUT1 OUT2 IN1 IN2 and GND. CC ...
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Truth Table Driver STBY OUT L Z Standby mode (DC/DC converter is stopped Space level output Mark level output Receiver STBY OUT L H Standby mode (DC/DC converter ...
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ABSOLUTE MAXIMUM RATINGS (T A Parameter Supply Voltage ( CHA Supply Voltage ( CHA Driver Input Voltage Receiver Input Voltage Control Input Voltage (STBY CHA Driver Output Voltage Receiver Output Voltage Input Current (D ...
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ELECTRICAL SPECIFICATIONS (TOTAL) (Unless otherwise specified – Parameter Symbol V CC STBY = H Circuit Current I CC1 V CC STBY = Circuit Current I CC2 V CC ...
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ELECTRICAL SPECIFICATIONS (DRIVER) (Unless otherwise specified – mode (unless otherwise specified, V Parameter Symbol Low-Level Input Voltage V IL High-Level Input Voltage V IH Low-Level Input Current I IL High-Level Input ...
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V mode (Unless otherwise specified, V Parameter Symbol Low-Level Input Voltage V IL High-Level Input Voltage V IH Low-Level Input Current I IL High-Level Input Current I IH Output Voltage V DO Output Short-Circuit Current I SC Note 9 ...
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Note 10. Measuring point V CC STBY OUT – Driver outputs are indefinite during transition time (t Note 11. Measuring point 3 High-impedance D ...
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ELECTRICAL SPECIFICATIONS (RECEIVER) (Unless otherwise specified 3 Parameter Symbol Low-Level Output Voltage V OL1 High-Level Output Voltage V OH1 Low-Level Output Voltage V OL2 High-Level Output Voltage V OH2 Propagation Delay Time t ...
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Note 13. Measuring point + – OUT V OL Note 14. Measuring point + – OUT V OL Note 15. Measuring point ...
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... Receiver outputs are indefinite during reset release time (t Note 17. Measuring point OUT V OL Receiver outputs are indefinite during reset release time (t REFERENCE MATERIAL • IC PACKAGE MANUAL (C10943X) • NEC SEMICONDUCTOR DEVICE RELIABILITY/QUALITY (IEI-1212) 3 PRA 0 PRA 4 PRA 0 PRA PD4721 11 ...
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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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PACKAGE DRAWINGS 20 PIN PLASTIC SHRINK 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. 11 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 ...