(ML145403 - ML145408) Drivers/Receivers - LANSDALE Semiconductor
Description
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ML145403 ML145404
ML145405 ML145408
Drivers/Receivers
RS 232/EIA–232–E and CCITT V.
28
Legacy Device: Motorola MC145403, MC145404, MC145405, MC145408
These devices are silicon gate CMOS ICs that combine both the transmitter and receiver to fulfill the electrical specifications of EIA Standard 232–E and CCITT V .
28.
The drivers feature true TTL input compatibility, slew rate limiting outputs, 300 Ω power–off source impedance, and output typically switching to within 25% of the supply rails.
The receivers can handle up to ± 25 V while presenting 3 to 7 kΩ impedance.
Hysteresis in the receivers aid in the reception of noisy signals.
By combining both drivers and receivers in a single CMOS chip, these devices provide efficient, low–power solutions for both EIA–232–E and V .
28 applications.
These devices offer the following performance features: • Operating Temperature Range TA = –40° to +85°C Drivers • ± 5 to ± 12 V Supply Range • 300 Ω Power–Off Source Impedance • Output Current Limiting • TTL and CMOS Compatible Inputs • Driver Slew Rate Range Limited to 30 V/µs Maximum Receivers • ± 25 V Input Range • 3 to 7 kΩ Input Impedance • 0.
8 V of Hysteresis for Enhanced Noise Immunity • TTL and CMOS Compatible Outputs
Available Driver/Receiver Combinations
Device ML145403 ML145404 ML145405 ML145408 Drivers 3 4 5 5 Receivers 5 4 3 5 Figure 1 2 3 4 No.
of Pins 20 20 20 24
Note: Lansdale lead free (Pb) product, as it becomes available, will be identified by a part number prefix change from ML to MLE.
Alternative EIA–232 devices to consider are: Three Supply ML145406 (3 x 3) Single Supply ML145407 (3 x 3)
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Issue A
ML145403, ML145404, ML145405, ML145408
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PIN ASSIGNMENTS (DIP AND SOG)
ML145403 3 DRIVERS/5 RECEIVERS
VDD Rx1 Tx1 Rx2 Rx3 Tx2 Rx4 Rx5 Tx3 VSS 1 2 3 4 5 6 7 8 9 10 20 V CC R D R R D R R D 19 18 17 16 15 14 13 12 11 DO1 DI1 DO2 DO3 DI2 DO4 DO5 DI3 GND
ML145404 4 DRI...
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