EXAR ST16C1551CJ28

Mfr. Part

ST16C1551CJ28

Manufacturer

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

Detailed Description

Single-channel UART integrated circuit, 16550/16C550 register compatible, designed for asynchronous serial communication. CJ28 indicates a J‑leaded 28‑pin package. Main Category: Integrated Circuits (ICs). Small Classification: Specialized ICs. Package/Case code: 1247. Data code: 10+. Quantity available: 2200 (subject to change). Ideal for adding a reliable UART to microcontroller or microprocessor designs.

Key Features

1-channel UART, 16550/16C550 compatible register set

Integrated TX/RX FIFOs for smoother data handling

Programmable baud rate generator for flexible speeds

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

Interrupt-driven operation for efficient CPU usage

8-bit host bus interface with typical TTL/CMOS levels

Compatible with common RS-232/RS-485 transceivers

Broad operating voltage family; see datasheet for exact VCC and I/O levels

Key Advantages

Drop-in compatible with the widely used 16550 architecture

Mature, proven design for long-term stability

Reduces CPU load using hardware FIFOs

Easy integration with MCUs/MPUs and existing drivers

Flexible baud rates to match many serial protocols

Robust signal handling for noisy industrial environments

Packaging

Type: CJ28 J‑leaded PLCC-28 package; Package/Case code: 1247

Material: Industry-standard molded package (see datasheet for exact material specification)

Size: Typical PLCC-28 body ~11 mm × 11 mm; height ~4 mm (approximate, verify in datasheet)

Pin configuration: 28 pins including data bus (D0–D7), address lines, chip select, read/write, interrupt, serial I/O (RXD, TXD), and modem control pins (CTS, RTS, DSR, DTR, DCD, RI)

Thermal characteristics: Operating temperature range available per grade (commercial/industrial); thermal resistance values depend on PCB and airflow (see datasheet for RθJA/RθJC)

Electrical properties: Typical VCC and I/O levels per family spec; TTL/CMOS compatible signals; integrated ESD protection levels and power consumption specified in datasheet

Lifecycle

Status: Mature product in the Exar/MaxLinear UART family. Not generally flagged as near discontinuation, but availability can vary by package/grade.

Equivalent or alternative models:

- MaxLinear/Exar XR16C550 and XR16L550 (single-channel, 16550-compatible; L-series for lower voltage)

- MaxLinear XR16C850 (enhanced UART with larger FIFOs)

- MaxLinear XR16C2552 (dual-channel alternative if two UARTs are needed)

- Texas Instruments TL16C550 series (16550-compatible)

- NXP SC16C550B (16550-compatible)

If you need exact pin-for-pin or drop-in replacements for CJ28 or specific voltage/temperature grades, contact our sales team via the Y-IC website for detailed cross-reference support.

Key Application Areas

Serial port expansion for MCUs and MPUs

Industrial automation, PLCs, and machine interfaces

POS terminals, kiosks, ticketing systems

Telecom, networking, and modem interfaces

RS-232/RS-485 communication modules

Embedded Linux/RTOS systems needing legacy UART compatibility

Test equipment, measurement instruments, and data loggers

Datasheet

Our website hosts the most authoritative datasheet for ST16C1551CJ28. Download it on this page now to get exact electrical, timing, and mechanical specifications.

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