DESCRIPTION
The MC145406 is a silicon-gate CMOS IC that combines 3 drivers and 3 receivers to fulfill the electrical specifications of standards EIA-232-D and CCITT V.28. The drivers feature true TTL input compatibility, slew-rate limited output, 300Ω power-off source impedance, and output typically switching to within 25% of the supply rails. The receivers can handle up to +25V while presenting 3 to 7kΩ impedance. Hysteresis in the receiver aids reception of noisy signals. By combining both drivers and receivers in a single CMOS chip, the MC145406 provides efficient, low-power solutions for EIA-232-D and V.28 applications.
   
FEATURES
• Drivers
• +5 to +12V supply range
• 300Ω power-off source impedance
• Output current limiting
• TTL compatible
• Maximum slew rate = 30V/µs
• Receivers
• +25V input voltage range over the full supply range
• 3 to 7kΩ input impedance
• Hysteresis on input switchpoint
• General
• Very low supply currents for long battery life
• Operation is independent of power supply sequencing
   
APPLICATIONS
• Modem interface
• Voice/data telephone interface
• Lap-top computers
• UART interface