MaxLinear, Inc. ST16C650ACQ48TR-F

Mfr. Part

ST16C650ACQ48TR-F

Manufacturer

Exar (MaxLinear)

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Detailed Description

Single-channel UART for 2.9 V to 5.5 V systems, with 32-byte TX/RX FIFOs, auto flow control, IrDA encoder/decoder, false start bit detection, and modem control signals. Integrated oscillator, printer port, and timer/counter reduce external parts. Supports RS-232/RS-422/RS-485 protocols via external line transceivers. RoHS compliant. 48-pin TQFP (7 x 7 mm) package, supplied on Tape & Reel. Current available stock: 2557 units (subject to change).

Key Features

1-channel UART core

32-byte transmit and 32-byte receive FIFOs

Max data rate 3.125 Mbps

Auto RTS/CTS flow control

IrDA encoder/decoder (SIR-level infrared support)

False start bit detection to improve noise immunity

Modem control lines (DTR, DSR, DCD, RI)

Internal oscillator for simplified clocking

Printer port function and integrated timer/counter

Wide supply range 2.9 V to 5.5 V

Supports RS-232/RS-422/RS-485 protocols with external transceivers

RoHS compliant, surface-mount 48-TQFP (7 x 7 mm)

Key Advantages

Fewer external parts thanks to the built-in oscillator and IrDA

Deep FIFOs reduce CPU interrupts and improve throughput

Works in both 3.3 V and 5 V designs for easy reuse

High-speed serial up to 3.125 Mbps

Robust communication via auto flow control and false start bit detection

Standard 16C650-style register set for broad software compatibility

Modem-control signaling ready for legacy and telecom equipment

Packaging

Type: TQFP, 48 leads

Size: 7 x 7 mm body; low-profile quad flat package for SMT

Delivery: Tape & Reel (TR) for automated pick-and-place

Material: Epoxy molding compound with copper leadframe; lead-free finish (RoHS)

Supplier Device Package: 48-TQFP (7 x 7)

Mounting: Surface mount

Pin configuration (functional groups):

- Serial I/O: TXD, RXD

- Flow control: RTS, CTS

- Modem signals: DTR, DSR, DCD, RI

- Host interface: 8-bit data bus (D0–D7), address lines (A0–A2), chip select, read/write strobe, interrupt lines

- Clock/oscillator pins and configuration pins

- Power and grounds

- Refer to the datasheet for exact pinout and pitch

Thermal characteristics:

- TQFP thermal behavior is board-dependent; use solid ground planes and copper area under the package for heat spreading

- Check datasheet for thermal resistance (θJA/θJC) and safe power dissipation

Electrical properties:

- Supply voltage: 2.9 V to 5.5 V

- Logic-level I/O compatible with typical 3.3 V/5 V systems (line-level conversion required for RS-232/RS-422/RS-485)

- Max data rate: 3.125 Mbps

- FIFO depth: 32 bytes TX, 32 bytes RX

- ESD protection levels vary by pin; external transceivers recommended for interface lines

Lifecycle

Status: Actively supported by MaxLinear based on public information; not indicated as near end-of-life

Recommended equivalents and alternatives:

- MaxLinear XR16C650 and XR16M650 series (functionally similar, 16C650-compatible)

- Exar/MaxLinear XR16C850 (superset features, larger FIFO)

- NXP SC16C650B (single-channel UART with FIFO)

- NXP SC16C750B (for larger FIFO needs)

- Texas Instruments TL16C650/TL16C650C (1650-class UARTs)

- Note: Pinouts, voltage ranges, and timing differ between vendors; verify mechanical and electrical compatibility in each datasheet

If you need exact drop-in replacements or the latest lifecycle status, contact Y-IC via our website for cross-reference and availability support

Key Application Areas

Industrial automation, PLC serial ports, and HMIs

POS terminals and receipt/label printers

Router and switch console ports

Embedded systems needing extra UART channels

RS-232/RS-422/RS-485 links with external transceivers

Modems and telecom gear using full modem control

Instrumentation, data logging, and test equipment

Medical and laboratory devices

Office equipment and legacy printer interfaces

IoT and consumer devices requiring reliable UART connectivity

Datasheet

Y-IC provides the most authoritative datasheet for ST16C650ACQ48TR-F on our product page. Download it now for exact pinout, timing, electrical limits, thermal data, and application guidelines.

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