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D4723GS Dataheets PDF



Part Number D4723GS
Manufacturers NEC
Logo NEC
Description UPD4723GS
Datasheet D4723GS DatasheetD4723GS Datasheet (PDF)

DATA SHEET MOS INTEGRATED CIRCUIT µPD4723 RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V The µPD4723 is a high-breakdown voltage silicon gate CMOS line driver/receiver based on the EIA/TIA-232-E standard. The internal DC/DC converter can switch between multiple voltages, allowing it to operate with a single +3.3 V or +5 V power supply. It also provides standby function. This IC incorporates 3 driver circuits and 3 receiver circuits. An RS-232 interface circuit can be easily configured by connecting.

  D4723GS   D4723GS


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DATA SHEET MOS INTEGRATED CIRCUIT µPD4723 RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V The µPD4723 is a high-breakdown voltage silicon gate CMOS line driver/receiver based on the EIA/TIA-232-E standard. The internal DC/DC converter can switch between multiple voltages, allowing it to operate with a single +3.3 V or +5 V power supply. It also provides standby function. This IC incorporates 3 driver circuits and 3 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 • Selectable +3.3 V/+5 V single power supply (selected by VCHA pin) • By setting the standby pin to a low level (standby mode), circuit current can be reduced. At such times, the driver output is in a high-impedance state. • Even in the standby mode, 2 receiver circuits can operate as inverters without hysteresis width. The other circuit is fixed at a high level. Ordering Information Part number Package 30-pin plastic SSOP (300 mil) µPD4723GS-GJG Document No. S12200EJ2V0DS00 (2nd edition) (Previous No. IC-3284) Date Published January 1997 N Printed in Japan © 1993 Free Datasheet http://www.datasheet4u.com/ µPD4723 BLOCK DIAGRAM/PIN CONFIGURATION (Top View) +10 V C3 + + 1 VDD C4+ 30 + C4 2 +3.3 V or +5 V C1 C1+ GND 29 + C2 C4– 28 3 VCC 4 C1– C5+ VSS 27 –10 V 5 C5 + 6 26 STBY GND C5– Note 4 300 Ω 25 VCHA 7 24 EN DIN1 8 300 Ω 23 DOUT1 DIN2 9 300 Ω 22 DOUT2 DIN3 10 21 DOUT3 ROUT1 11 5.5 kΩ ROUT2 12 5.5 kΩ ROUT3 13 5.5 kΩ NC 14 20 RIN1 19 RIN2 18 RIN3 17 NC NC 15 16 NC Note 1. VDD and VSS are output pins stepped up internally. These pins should not be loaded directly. 2. Capacitors C1 to C5 with a breakdown voltage of 20 V or higher are recommended. And it is recommended to insert the capacitor that is 0.1 µF to 1 µF between VCC and GND. 3. If VCHA is kept low level (in 5 V mode), capacitor C5 is not necessary. 4. The pull-up resistors at driver input are active resistors. 2 Free Datasheet http://www.datasheet4u.com/ µPD4723 Truth Table Driver STBY L H H DIN × L H DOUT Z H L Remarks Standby mode (DC/DC converter is stopped) Space level output Mark level output Receiver RIN STBY L L EN L H R2 to R3 × L R1 × × × ROUT R2 to R3 H H R1 H H Remarks Standby mode 1 (DC/DC converter is stopped) Standby mode 2 (DC/DC converter is stopped, R2 and R3 are operated) Standby mode 2 (DC/DC converter is stopped, R2 and R3 are operated) Mark level input Space level input L H × × H L H H H L H H L 3 V ↔ 5 V switchingNote 5 VCHA L H Operating mode 5 V mode (double step-up) 3 V mode (3 times step-up) H: high-level, L: low-level, Z: high-impedance, ×: H or L Note 5. When switching VCHA, standby mode must be selected (STBY = L). 3 Free Datasheet http://www.datasheet4u.com/ µPD4723 ABSOLUTE MAXIMUM RATINGS (TA = 25 °C) Parameter Supply Voltage (VCHA = L) Supply Voltage (VCHA = H) Driver Input Voltage Receiver Input Voltage Control Input Voltage (STBY, VCHA, EN) Driver Output Voltage Receiver Output Voltage Input Current (DIN, STBY, VCHA, EN) Operating Ambient Temperature Storage Temperature Total Power Dissipation Symbol VCC VCC DIN RIN VIN DOUT ROUT IIN TA Tstg PT Ratings –0.5 to +7.0 –0.5 to +4.5 –0.5 to VCC +0.5 –30.0 to +30.0 –0.5 to VCC +0.5 –25.0 to +25.0Note 6 Unit V V V V V V V mA °C °C W –0.5 to VCC +0.5 ± 20.0 –40 to +85 –55 to + 150 0.5 Note 6. Pulse width = 1 ms, duty = 10 % MAX. RECOMMENDED OPERATING CONDITIONS Parameter Supply Voltage (VCHA = L, 5 V mode) Supply Voltage (VCHA = H, 3 V mode) High-Level Input Voltage (DIN) Low-Level Input Voltage (DIN) High Level Input Voltage (STBY, VCHA, EN) Low Level Input Voltage (STBY, VCHA, EN) Receiver Input Voltage Operating Ambient Temperature Capacitance of External Capacitor Symbol VCC VCC VIH VIL VIH VIL RIN TA Note 7 MIN. 4.5 3.0 2.0 0 2.4 0 –30 –40 0.33 TYP. 5.0 3.3 MAX. 5.5 3.6 VCC 0.8 VCC 0.6 +30 +85 4.7 Unit V V V V V V V °C µF Note 7. In low temperature (below 0 °C), the capacitance of electrolytic capacitor becomes lower. Therefore, set higher values when using in low temperature. Concerning the wiring length between the capacitor and the IC, the shorter the better. Capacitors with good frequency characteristics such as tantalum capacitors, laminated ceramic capacitors, and aluminum electrolytic capacitors for switching power supply are recommended for the external capacitors. 4 Free Datasheet http://www.datasheet4u.com/ µPD4723 ELECTRICAL SPECIFICATIONS (TOTAL) (UNLESS OTHERWISE SPECIFIED, TA = –40 to +85 °C, C1 to C5 = 1 µF) Parameter Symbol Conditions VCC = +3.3 V, No load, RIN pin OPEN, STBY = H Circuit Current ICC1 VCC = +5.0 V, No load, RIN pin OPEN, STBY = H VCC = +3.3 V, RL = 3 kΩ (DOUT), DIN = GND, RIN, ROUT pin OPEN, STBY = H Circuit Current ICC2 VCC = +5.0 V,RL = 3 kΩ (DOUT), DIN = GND, RIN, ROUT pin OPEN, STBY = H VCC = +3.3 V, No load, DIN and RIN pins are OPEN, STBY = L, EN = L, TA = 25 °C VCC = +3.3 V, No l.


HBT-00-04G D4723GS 2N2711


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