TL16C752DPFBR from Texas Instruments, in a TQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	D5	bidirectional	Data bus bit 5, an 8-bit 3-state bidirectional bus to the controlling CPU.
2	D6	bidirectional	Data bus bit 6, an 8-bit 3-state bidirectional bus to the controlling CPU.
3	D7	bidirectional	Data bus bit 7, an 8-bit 3-state bidirectional bus to the controlling CPU.
4	RXB	input	Receive data input for UART channel B; RXB should be held high when no data is being received in normal mode.
5	RXA	input	Receive data input for UART channel A; RXA should be held high when no data is being received in normal mode.
6	TXRDYB	output	Transmit ready for channel B (active low), going low when a trigger level number of spaces is available.
7	TXA	output	Serial transmit data output for UART channel A.
8	TXB	output	Serial transmit data output for UART channel B.
9	OPB	output	User-defined output for channel B, set by MCR bit 3 and high after reset.
10	CSA	input	Chip select A (active low) that enables data transfers between the CPU and channel A.
11	CSB	input	Chip select B (active low) that enables data transfers between the CPU and channel B.
12	NC	unconnected	No internal connection.
13	XTAL1	input	Crystal or external clock input that sets the oscillator clock for the baud rate generator.
14	XTAL2	output	Crystal oscillator output or buffered clock output, used with XTAL1.
15	IOW	input	Write strobe (active low) that transfers the data bus contents into the register selected by A0-A2.
16	CDB	input	Carrier detect for channel B (active low); a low indicates a carrier was detected by the modem.
17	GND	power_in	Power signal and power ground.
18	RXRDYB	output	Receive ready for channel B (active low), going low at the trigger level or timeout and high when the RX FIFO is empty or in error.
19	IOR	input	Read strobe (active low) that loads the register selected by A0-A2 onto the data bus D0-D7.
20	DSRB	input	Data set ready for channel B (active low), indicating the modem is powered on and ready for data exchange.
21	RIB	input	Ring indicator for channel B (active low); a low-to-high transition generates a modem status interrupt if enabled.
22	RTSB	output	Request to send for channel B (active low), used for auto-RTS hardware flow control when enabled.
23	CTSB	input	Clear to send for channel B (active low), used for auto-CTS hardware flow control when enabled.
24	NC	unconnected	No internal connection.
25	NC	unconnected	No internal connection.
26	A2	input	Address bit 2 for selecting the internal registers.
27	A1	input	Address bit 1 for selecting the internal registers.
28	A0	input	Address bit 0 for selecting the internal registers.
29	INTB	output	Interrupt B (active high), enabled by MCR bit 3 and high-impedance after reset.
30	INTA	output	Interrupt A (active high), enabled by MCR bit 3 and high-impedance after reset.
31	RXRDYA	output	Receive ready for channel A (active low), going low at the trigger level or timeout and high when the RX FIFO is empty or in error.
32	OPA	output	User-defined output for channel A, set by MCR bit 3 and high after reset.
33	RTSA	output	Request to send for channel A (active low), used for auto-RTS hardware flow control when enabled.
34	DTRA	output	Data terminal ready for channel A (active low), controlled by MCR bit 0 and high after reset.
35	DTRB	output	Data terminal ready for channel B (active low), controlled by MCR bit 0 and high after reset.
36	RESET	input	Active high reset that resets the internal registers and all outputs, disabling the transmitter output and receiver input during reset.
37	NC	unconnected	No internal connection.
38	CTSA	input	Clear to send for channel A (active low), used for auto-CTS hardware flow control when enabled.
39	DSRA	input	Data set ready for channel A (active low), indicating the modem is powered on and ready for data exchange.
40	CDA	input	Carrier detect for channel A (active low); a low indicates a carrier was detected by the modem.
41	RIA	input	Ring indicator for channel A (active low); a low-to-high transition generates a modem status interrupt if enabled.
42	VCC	power_in	Power supply input, supporting a wide supply voltage range of 1.62 V to 5.5 V.
43	TXRDYA	output	Transmit ready for channel A (active low), going low when a trigger level number of spaces is available.
44	D0	bidirectional	Data bus bit 0, the least significant bit and first bit of the serial stream, on the 8-bit 3-state bus.
45	D1	bidirectional	Data bus bit 1 on the 8-bit 3-state bidirectional bus to the controlling CPU.
46	D2	bidirectional	Data bus bit 2 on the 8-bit 3-state bidirectional bus to the controlling CPU.
47	D3	bidirectional	Data bus bit 3 on the 8-bit 3-state bidirectional bus to the controlling CPU.
48	D4	bidirectional	Data bus bit 4 on the 8-bit 3-state bidirectional bus to the controlling CPU.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TQFP-48(7x7)
Category	Interface
Pins	48

CAD (KiCad official)

Symbol: TL16C752DPFBR
Footprint: Package_QFP:TQFP-48_7x7mm_P0.5mm
3D model: TQFP-48(7x7) (KiCad packages3D, STEP)
3D model files: tl16c752dpfbr-etched.step / tl16c752dpfbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl16c752dpfbr.step / tl16c752dpfbr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (57 pp, sha256 1938aff79986a6e4, retrieved 2026-11-05, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

TL16C752DPFBR

Verified TL16C752DPFBR

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README

TL16C752DPFBR

Pinout

Key specifications

CAD (KiCad official)

Provenance