Sipex ST16C554DCJ68TR

Mfr. Part

ST16C554DCJ68TR

Manufacturer

Sipex (brand legacy now under Exar/MaxLinear). Y-IC is a quality distributor of Sipex/Exar/MaxLinear products and we will provide you with the best products and services.

Detailed Description

Quad asynchronous UART, 16C550-compatible register set, four independent serial channels in one IC. Designed for Interface — Drivers, Receivers, Transceivers use cases. Commonly used to add multiple UART ports to embedded systems via a parallel CPU/host bus. Current listing indicates RoHS not applicable and shipping package Bulk. Model suffix DCJ68TR suggests a 68‑pin package version originally offered on tape and reel.

Key Features

Four independent UART channels in one device

16C550-compatible registers for easy drop-in and software reuse

Per-channel transmit and receive FIFOs (typical 16 bytes, see datasheet for exact depth)

Programmable baud rate generator per channel

Standard modem control signals per channel (CTS, RTS, DSR, DTR, DCD, RI)

Interrupt outputs and flexible interrupt control per channel

Parallel host interface compatible with typical microprocessors and controllers

TTL/CMOS-level I/O, 5 V supply variants available

Wide ecosystem compatibility with classic 16550/16C55x software drivers

Key Advantages

Consolidates four UARTs into one IC, saving board space and BOM cost

Proven 16C550-compatible design simplifies firmware and driver integration

Reduces CPU load thanks to hardware FIFOs and interrupt-driven operation

Broad cross-vendor availability and second-source options to support long-term supply

Familiar pinout and signals ease migration from singleor dual-UART solutions

Packaging

Shipping package type in this listing is Bulk, typically supplied in trays or antistatic packaging for assembly

Device package for the DCJ68TR suffix is commonly a 68‑pin plastic package (PLCC or TQFP family depending on vendor release). Pin pitch and exact body size vary by case option. Confirm in the datasheet for the DCJ68 variant.

Package material is molded plastic with gullwing or J‑lead pins depending on case style

Pin configuration supports four UART channels with shared data/address bus and control signals; see pin map in the datasheet

Thermal characteristics such as junction‑to‑ambient and maximum junction temperature depend on the specific case; follow datasheet guidance and provide adequate airflow or copper area

Electrical properties include 5 V supply range options, TTL/CMOS logic levels, and oscillator/clock input for baud generation; exact limits and timing are in the datasheet

RoHS in this listing is not applicable, so devices may be leaded; verify compliance requirements before production

Lifecycle

Brand note: Sipex was acquired by Exar; Exar was later acquired by MaxLinear. Many Sipex ST16C554 variants are now NRND or EOL under legacy branding.

Equivalent or alternative models available. Evaluate these as drop‑in or near‑drop‑in replacements, checking voltage, FIFO depth, speed, and package:

- Exar/MaxLinear XR16C554 family (5 V), XR16L554 (3.3 V), XR16M554 (enhanced variants)

- Texas Instruments TL16C554, TL16C554A (various packages and temp grades)

- NXP SC16C554 family (and related SC16C654 for enhanced features)

- Oxford Semiconductor OX16C954 family offers higher FIFOs and features if you need upgrades rather than 1:1 replacement

If you need exact mechanical and electrical compatibility for ST16C554DCJ68TR, contact our sales team via the Y-IC website for current cross-reference guidance and stock status

Key Application Areas

Industrial automation and PLCs requiring multiple UART ports

POS systems, kiosks, ticketing, and ATM terminals

Telecom equipment, base stations, and network infrastructure

Multiport serial expansion cards and embedded host adapters

Test and measurement instruments and data loggers

Printers, scanners, and legacy serial peripherals integration

Routers, gateways, and IoT edge devices needing reliable UART links

Datasheet

Our website hosts the most authoritative datasheet for the current product model. For exact package details, pinouts, timing, and electrical limits, download the datasheet on this page. We recommend reviewing the datasheet before design-in to confirm speed, FIFO depth, and package specifics.

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