MC145705

Manufacturer Part NumberMC145705
Description(MC145706 / MC145707) 5 Volt Only Driver/Receiver with an Integrated Standby Mode
ManufacturerMotorola
MC145705 datasheet
 
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Product Preview
5 Volt Only
Driver/Receiver with an
Integrated Standby Mode
EIA–232–E and CCITT V.28
The MC145705/06/07 are a series of silicon–gate CMOS transceiver ICs that
fulfill the electrical specifications of EIA–232–E and CCITT V.28 while operating
from a single + 5 V power supply. These transceiver series are high
performance and low power consumption devices that are equipped with
standby and output enable function.
A voltage doubler and inverter convert the + 5 V to
accomplished through an on–board 20 kHz oscillator and four inexpensive
external electrolytic capacitors.
The MC145705 is composed of two drivers and three receivers, the
MC145706 has three drivers and two receivers, and the MC145707 has three
drivers and three receivers. These drivers and receivers are virtually identical to
those of the MC145407.
Available Driver/Receiver Combinations
Device
Drivers
Receivers
MC145705
2
3
MC145706
3
2
MC145707
3
3
Drivers:
7.5 Output Swing
300
Power–Off Impedance
Output Current Limiting
TTL and CMOS Compatible Inputs
Three–State Outputs During Standby Mode
Hold Output OFF (MARK) State by TxEN Pin
Receivers:
25 V Input Range
3 to 7 k Input Impedance
0.8 V Hysteresis for Enhanced Noise Immunity
Three–State Outputs During Standby Mode
Charge Pumps:
+ 5 to
10 V Dual Charge Pump Architecture
Supply Outputs Capable of Driving Three Drivers on the MC145403/06
Simultaneously
Requires Four Inexpensive Electrolytic Capacitors
On–Chip 20 kHz Oscillators
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
REV 1
8/95
MOTOROLA
Motorola, Inc. 1995
10 V. This is
No. of Pins
20
20
24
Order this document
by MC145705/D
MC145705
MC145706
MC145707
P SUFFIX
PLASTIC DIP
CASE 738
20
1
DW SUFFIX
SOG PACKAGE
20
CASE 751D
1
P SUFFIX
PLASTIC DIP
CASE 724
24
1
DW SUFFIX
SOG PACKAGE
24
CASE 751E
1
ORDERING INFORMATION
MC145705P
Plastic DIP
MC145706P
Plastic DIP
MC145707P
Plastic DIP
MC145705DW
SOG Package
MC145706DW
SOG Package
MC145707DW
SOG Package
MC145705 MC145706 MC145707
1

MC145705 Summary of contents

  • Page 1

    ... Driver/Receiver with an Integrated Standby Mode EIA–232–E and CCITT V.28 The MC145705/06/07 are a series of silicon–gate CMOS transceiver ICs that fulfill the electrical specifications of EIA–232–E and CCITT V.28 while operating from a single + 5 V power supply. These transceiver series are high performance and low power consumption devices that are equipped with standby and output enable function ...

  • Page 2

    ... C2– STB Rx1 7 14 Rx2 8 13 Tx1 9 12 Rx3 10 11 Tx2 MC145705 MC145706 MC145707 2 PIN ASSIGNMENTS C1+ C2 GND C1– C2– TxEN STB DO1 Tx1 DO2 Rx1 DI1 Tx2 DO3 Rx2 DI2 Tx3 MC145707 3 DRIVERS/3 RECEIVERS ...

  • Page 3

    ... DOUBLER + C1– RECEIVER 5 Protection Circuit DRIVER V DD 300 MOTOROLA FUNCTION DIAGRAM OSC GND VOLTAGE + INVERTER C1+ C2+ C2– + – STB TxEN LEVEL SHIFT STB DO 1 1.4 V – MC145705 MC145706 MC145707 3 ...

  • Page 4

    ... Input Threshold Hysteresis ( off ) Input Resistance High–Level Output Voltage (DO1 – DO3) V Rx1 – Rx3 = – – Low–Level Output Voltage (DO1 – DO3) V Rx1 – Rx3 = + MC145705 MC145706 MC145707 4 Value Unit – – ...

  • Page 5

    ... Min Typ Max Unit s — 0.5 1 — 0 — — 5 — — — — — 1 — — 1 — 250 400 ns — 40 100 ns — — STB Don’t Care MC145705 MC145706 MC145707 5 ...

  • Page 6

    ... PHL 90% DO1 – DO3 (OUTPUT) 10 MC145705 MC145706 MC145707 6 state. In this condition, supply current below 10 A (Typ) and can be operated with low current consumption. C2+, C2–, C1+, C1– Voltage Doubler and Inverter These are the connections to the internal voltage doubler and inverter, which generate the V DD and V SS voltages ...

  • Page 7

    ... C1 and C2. C2+ C1 GND 23 2 C2– C1– STB 20 TxEN Rx1 18 DO1 8 Tx1 17 DI1 Rx2 9 DO2 16 10 Tx2 15 DI2 Rx3 DO3 Tx3 13 DI3 MC145705 MC145706 MC145707 15 V using the 0 ...

  • Page 8

    ... SEATING PLANE –A– –B– 20X 0.010 (0.25 18X K MC145705 MC145706 MC145707 8 PACKAGE DIMENSIONS P SUFFIX PLASTIC DIP CASE 738– 0.25 (0.010) 0.25 (0.010 SUFFIX SOG PACKAGE CASE 751D–04 ...

  • Page 9

    ... EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 15.25 15.54 0.601 0.612 B 7.40 7.60 0.292 0.299 C 2.35 2.65 0.093 0.104 _ D 0.35 0.49 0.014 0.019 F 0.41 0.90 0.016 0.035 G 1.27 BSC 0.050 BSC J 0.23 0.32 0.009 0.013 K 0.13 0.29 0.005 0.011 10.05 10.55 0.395 0.415 R 0.25 0.75 0.010 0.029 MC145705 MC145706 MC145707 9 ...

  • Page 10

    ... MC145705 MC145706 MC145707 10 This page intentionally left blank. MOTOROLA ...

  • Page 11

    ... MOTOROLA This page intentionally left blank. MC145705 MC145706 MC145707 11 ...

  • Page 12

    ... P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE (602) 244–6609 INTERNET: http://Design–NET.com MC145705 MC145706 MC145707 12 JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315 HONG KONG: Motorola Semiconductors H.K. Ltd. ...