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MC145705P Scheda tecnica(PDF) 1 Page - Motorola, Inc |
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MC145705P Scheda tecnica(HTML) 1 Page - Motorola, Inc |
1 / 12 page MC145705 •MC145706•MC145707 MOTOROLA 1 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 ± 10 V. This is 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 No. of Pins MC145705 2 3 20 MC145706 3 2 20 MC145707 3 3 24 Drivers: • ± 7.5 Output Swing • 300 Ω 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 kΩ 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. Order this document by MC145705/D MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC145705 MC145706 MC145707 P SUFFIX PLASTIC DIP CASE 738 ORDERING INFORMATION MC145705P Plastic DIP MC145706P Plastic DIP MC145707P Plastic DIP MC145705DW SOG Package MC145706DW SOG Package MC145707DW SOG Package P SUFFIX PLASTIC DIP CASE 724 DW SUFFIX SOG PACKAGE CASE 751E DW SUFFIX SOG PACKAGE CASE 751D 20 1 24 1 20 1 24 1 © Motorola, Inc. 1995 REV 1 8/95 |
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