Sipex ST16C450CJ44TR

Mfr. Part

ST16C450CJ44TR

Manufacturer

Sipex

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Detailed Description

Single-channel Universal Asynchronous Receiver/Transmitter (UART), 16C450-compatible

Integrated Circuits (ICs), Interface Drivers, Receivers, Transceivers

Designed to bridge parallel processor buses to serial links (works with RS-232/RS-485 line transceivers)

Basic UART architecture for simple, reliable serial communication

Key Features

Fully compatible register set with industry-standard 16C450

Programmable data length (5–8 bits), parity (none/odd/even), stop bits (1 or 2)

Programmable baud rate via divisor registers with external clock or crystal

Separate transmit (TXD) and receive (RXD) serial paths

Interrupts for transmit, receive, and modem status

Modem control pins: CTS, RTS, DSR, DTR, RI, DCD

Simple 450 core (no FIFO), low latency, straightforward driver design

TTL/CMOS-compatible bus signals for easy MCU/CPU interfacing

RoHS status: Not applicable per current listing

Key Advantages

Drop-in software compatibility with legacy 16C450 designs

Minimal software overhead and easy integration

Broad ecosystem and many alternatives for long-term support

Proven, stable UART architecture for industrial and embedded use

Packaging

Shipping format: Bulk

Package type: CJ44 suffix typically indicates a 44-pin PLCC package; current listing shows Bulk. Please confirm exact package style in the datasheet before PCB layout

Package material: Molded plastic PLCC (typical for CJ44)

Pin configuration: 44 pins. Common pins include D0–D7 (data bus), A0–A2 (address), CS, RD, WR, IRQ, TXD, RXD, CTS, RTS, DSR, DTR, RI, DCD, XTAL1, XTAL2, RESET, VCC, GND. Refer to the datasheet for the precise pin map

Size: Standard PLCC-44 body dimensions. See mechanical drawing in the datasheet for exact measurements

Thermal characteristics: Low power dissipation, no heatsink required in normal operation; follow ambient and junction limits in the datasheet

Electrical properties: Single logic supply (commonly 5 V for many 16C450 devices), TTL/CMOS-level I/O. Maximum baud rate depends on clock source. Verify exact limits in the datasheet

Lifecycle

Sipex brand has been integrated into Exar and now MaxLinear. ST16C450CJ44TR may be NRND or discontinued in some channels

Recommended equivalents and alternatives

- Exar/MaxLinear XR16C450 series (functionally similar 16C450 UARTs)

- Texas Instruments TL16C450/SN16C450 family

- NXP/Philips SC16C450 series

- If FIFO is desired: XR16C550, TL16C550, SC16C550 (not identical but compatible with 16C550 feature set)

For exact pin-to-pin replacements and status confirmation, contact our sales team via the Y-IC website. We will verify availability and guide you to the best match

Key Application Areas

Add UART capability to microcontrollers, CPUs, and DSPs

RS-232 and RS-485 serial ports with external line drivers/receivers

Industrial control, PLCs, HMIs, and factory automation

POS, kiosks, printers, modems, and telecom gear

Test instruments, data loggers, and measurement equipment

Embedded system debug console and bootloader communication

Datasheet

Y-IC hosts the most authoritative datasheet and documentation for ST16C450CJ44TR on our product page. Download it now for pinout, timing, electrical specifications, and mechanical drawings

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