EXAR ST16C554DIJ-F

Mfr. Part

ST16C554DIJ-F

Manufacturer

Exar (MaxLinear). Y-IC is a quality distributor of Exar/MaxLinear products. We supply original parts and provide the best products and services to our customers.

Detailed Description

Quad-channel UART IC that puts four independent serial ports into one chip. Fully compatible with the classic 16C450/16C550 register set, making it a simple drop-in for many legacy designs. Ideal for adding multiple UARTs to embedded systems, industrial controllers, and communication cards.

Key Features

Four UART channels in one device

Standard 16C450/16C550 register compatibility for easy software reuse

Transmit and receive FIFOs per channel for smoother data flow

Programmable baud rate generator for a wide range of serial speeds

Configurable framing: 5–8 data bits, 1–2 stop bits, odd/even/no parity

Hardware flow control with RTS/CTS and modem signals (DTR, DSR, DCD, RI)

Interrupt support for RX/TX events, line status, and modem status

Loopback test mode for quick validation

Power-saving modes to reduce consumption

Lead-free, RoHS-compliant (-F suffix)

Key Advantages

Consolidates four serial ports and simplifies system design

Straightforward replacement for many legacy 16C55x parts

Proven UART architecture with stable timing and broad driver support

Cuts BOM and board space compared with multiple single-UART ICs

Reliable operation across industrial environments

Packaging

Type: Surface-mount plastic IC (family commonly offered in LQFP or PLCC options)

Material: Molded plastic package with tin/lead-free terminals (-F indicates RoHS lead-free)

Size: Exact mechanical dimensions depend on the package option; confirm in the datasheet

Pin configuration:

- Per channel: TXD, RXD and modem control pins (RTS, CTS, DTR, DSR, DCD, RI)

- Shared bus interface: parallel data bus, address/select, read/write control, reset, interrupt lines

- Clock: oscillator or external clock input for baud rate generator

Thermal characteristics: Follow datasheet guidance for thermal metrics (θJA, power dissipation). Use good copper area and airflow for heat spreading and keep junction within rated limits.

Electrical properties: CMOS/TTL-compatible I/O. Supply voltage and exact limits depend on the specific ST16C554DIJ-F package and version; verify in the datasheet for voltage range, input thresholds, and timing.

Package or case reference: 1247 (as listed). Confirm mechanical drawings and pinouts in the datasheet before layout.

Lifecycle

Generally a mature, widely used quad-UART family. Not commonly flagged as near end-of-life, but lifecycle can vary by package and variant. Always verify current status.

Alternative and cross-reference options to consider

- Texas Instruments TL16C554A (quad UART, 16C550-compatible)

- NXP/Philips SC16C854 or SC16C654 family (multi-channel UARTs)

- Maxim Integrated MAX14830 (quad UART via SPI/I2C, functional alternative; not pin-compatible)

- Oxford OX16C954 (quad UART; check availability and compatibility)

- Exar XR16L554 (low-power quad UART; same family lineage, check pinout and voltage)

Important: Check pin-compatibility, voltage levels, timing, and driver support before substituting.

If you need an exact equivalent and do not see it listed, please contact our sales team on the Y-IC website for up-to-date lifecycle and cross-reference support.

Key Application Areas

Industrial control, PLCs, and factory automation

Embedded systems needing multiple serial ports

RS-232 and RS-485 interface cards and expansion modules

Networking and telecom baseboards

Point-of-sale terminals and kiosks

Data logging and instrumentation

Transportation systems and building automation

Datasheet

Y-IC hosts the most authoritative datasheet and technical documents for ST16C554DIJ-F. Download the datasheet from this page to get exact pinouts, electrical limits, package drawings, and timing information.

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