DS1489N – NATIONAL SEMICONDUCTOR

Part Number:

DS1489N

Manufacturer:

NATIONAL SEMICONDUCTOR

Date Code:

RoHS:

Non-RoHS

MSL:

COO:

Description:

Inverted Schmitt Trigger, Totem‑Pole Output, 5 V, 85 ns, 19.18 mm

Datasheet:

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Stock Quantity: 22

Selling Unit: Each

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Product Details:

Overview

The National Semiconductor DS1489N is a quad RS-232 receiver designed for robust serial data communication interfaces. Its primary function is to translate the voltage levels of an RS-232 serial data stream into standard TTL/CMOS logic levels, enabling microcontrollers and other digital logic to interpret incoming data. A critical design consideration for such receivers is their susceptibility to common-mode noise; the DS1489N mitigates this through its differential input structure, though careful PCB layout and grounding are still paramount to prevent signal integrity degradation in noisy environments.

Key Features

0/4 Drivers/Receivers
RS232 Protocol Compliance
4.75V to 5.25V Supply Voltage Range
TTL/CMOS Output Logic Levels
Through Hole Mounting
14-PDIP (0.300″, 7.62mm) Package

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

Industrial control system serial ports
Legacy equipment data acquisition interfaces
Point-of-sale terminal communication links
Embedded system debugging interfaces