The MC145403 has been discontinued. Suggested replacement: none.
The MC145403 is a silicon-gate CMOS IC that combines 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 ohm 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 k ohms impedance. Hysteresis in the receivers aids
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.
See related devices: MC145404 (4 x 4), MC145405 (5 x 3), MC145408 (5 x 5)