ST16C550CQ48TR-F

ST16C550CQ48TR-F is STMicroelectronics’ 16C550-compatible universal asynchronous receiver/transmitter (UART) in a 48‑pin CQ package (lead‑free, tape and reel). It provides a full serial port controller that remains compatible with classic 8250/16450/16550 interfaces, so it can replace legacy UARTs in embedded systems and peripherals.
Key points:
- 16C550-compatible UART with programmable baud-rate generator
- Configurable serial formats: 5–8 data bits, 1 or 2 stop bits, parity
- Internal transmit/receive buffering with interrupt-driven data transfer
- Standard modem and line control/status signals (e.g., DTR/RTS/CTS/DSR/DCD)
- Interfaces with TTL or RS-232 levels via external transceivers
- Typical 5V operation; industrial-temperature variants available
- 48-pin package; TR‑F denotes tape‑and‑reel, lead‑free
Applications include serial ports for microcontrollers, modems, printers, and other devices requiring a robust, 16C550‑class UART. For exact electrical specs (voltage, temperature range, FIFO size), consult the latest datasheet for this exact package variant.

ST16C550CQ48TR-F is a 1-channel UART (STMicroelectronics) compatible with 8250/16550, in a 48-pin CQFP package (Tape & Reel, Pb‑free).
Key features:
- 16C550-compatible UART core with standard 16550-era registers
- FIFO buffers on RX and TX to reduce CPU interrupts
- Programmable baud rate generator (supports common asynchronous rates; fractional divisor option)
- 8 data bits with selectable parity (none, even, odd, mark, space) and 1 or 2 stop bits
- Break generation and comprehensive error/status reporting (parity, framing, overrun)
- Interrupt-driven with multiple sources (e.g., data available, THR empty, line status, modem status)
- Modem control and handshake signals (DTR/RTS outputs; CTS/DSR/DCD/RI inputs)
- Optional hardware flow control via RTS/CTS
- Diagnostic features including loopback/test capability
This device is suitable for high-performance serial interfaces requiring UART compatibility with the 16550 family, in a 48-pin package.

48-pin QFP (LQFP) package; RoHS lead-free finish (the -F) and tape-and-reel packaging (the -TR).

- Pin count: 48 pins (CQ48 package)
- Function: 1-channel UART (16C550-compatible) for asynchronous serial communication (RS-232 level interface to a host/controller).

Manufacturer: STMicroelectronics (ST).
What kind of company: A multinational electronics and semiconductor company headquartered in Geneva, Switzerland. It’s one of the world's largest semiconductor manufacturers, designing and producing a broad range of ICs and electronic components (e.g., microcontrollers, analog, sensors, power management, and UARTs).

Applications of ST16C550CQ48TR-F:
- Embedded systems and microcontroller UART expansion (RS-232/TTL)
- Industrial automation and PLCs
- Telecom and networking equipment (console ports, modems)
- Data acquisition and instrumentation
- Point-of-Sale devices, printers, kiosks
- Medical devices requiring reliable serial links
- Automotive and sensor interfacing to microcontrollers

Equivalent / compatible UARTs (16C550-family):
- TI TL16C550 / TL16C550C
- NXP/Philips SC16C550 (SC16C550C)
- Exar XR16C550 (XR16C550 / XR16C550E)
- Intel 8250/16550-compatible UARTs (16550-family)
Note: pinouts and voltage may vary; verify package and feature parity for your design.