MC1489AP

Drivers, Receivers, Transceivers Overview

The MC1489AP is a monolithic quad line receiver manufactured by onsemi, designed to interface data terminal equipment with data communications equipment in conformance with EIA-232D specifications. It operates within an ambient temperature range of 0°C to +75°C and utilizes a PDIP-14 package. The device accepts input voltages up to ±30 V with an input resistance between 3.0 kΩ and 7.0 kΩ. Electrical characteristics include a typical power supply current of 16 mA at 5.0 Vdc, with a maximum of 26 mA. Propagation delay times are specified as 85 ns for high-to-low transitions and 50 ns for low-to-high transitions under standard load conditions.

Drivers, Receivers, Transceivers Feature Summary

• Built-in input hysteresis thresholds provide noise rejection capabilities.
• External response control nodes allow for adjustable logic threshold shifting.
• Response control pins support external capacitor connections for high-frequency noise filtering.

Drivers, Receivers, Transceivers Applications

• Interfacing data processing equipment with data communications equipment per EIA-232D standards.
• Translating logic levels between MOS circuits and DTL or TTL systems.
• Converting EIA-232D signal levels to DTL logic inputs.

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'P' corresponds to the PDIP-14 plastic dual in-line package configuration. Confirm that the component meets the required operating temperature range of 0°C to +75°C for the intended environment. Ensure compatibility with the 5.0 Vdc power supply voltage specified in the electrical characteristics table.

Drivers, Receivers, Transceivers Selection Notes

Select the MC1489A variant if higher input threshold voltage margins are required compared to the standard MC1489. Consider the SOIC-14 or SOEIAJ-14 packages if surface-mount technology is preferred over through-hole mounting. Evaluate the need for external response control components to tailor threshold voltages for specific MOS-to-TTL translation applications.

Drivers, Receivers, Transceivers Part Context

This component belongs to the MC1489 family of quad line receivers produced by onsemi. It serves as the companion receiver to the MC1488 quad driver, forming a complete interface system for serial communication links. The device is part of onsemi's analog mixed-signal portfolio, utilizing bipolar technology to handle high-voltage RS-232 signals.

Drivers, Receivers, Transceivers Replacement Considerations

MC1489A

Drivers, Receivers, Transceivers FAQ

How does the MC1489 handle open circuit input conditions?

The input hysteresis thresholds are set above ground potential. Consequently, an open or grounded input results in the same output state as a negative or Logic '1' input, satisfying EIA-232D requirements for decoding power-off conditions.

What is the function of the Response Control pin?

The Response Control pin allows designers to vary input threshold voltage levels by connecting a resistor to an external power supply. It can also be used to filter high-frequency noise pulses by adding a capacitor to ground.

Can multiple MC1489 receivers be paralleled?

Yes, two receivers can be slaved to the same line to meet EIA-232D impedance requirements, provided the designer avoids driving the response node with a low-impedance source exceeding one diode drop from ground.