THVD1452DR from Texas Instruments, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	NC	unconnected	No internal connection. Leave floating or tie to ground; no electrical function.
2	R	output	Receiver data output. Digital CMOS output that reflects the recovered logic state of the receiver differential inputs A/B. VOH ≈ VCC − 0.2 V, VOL ≈ 0.2 V.
3	RE	input	Receiver enable, active low. Digital input with an internal 2-MΩ pull-up; drive low to enable the receiver output R, high (or leave open) to place R in high-impedance.
4	DE	input	Driver enable, active high. Digital input with an internal 2-MΩ pull-down; drive high to enable the differential driver outputs Y/Z, low (or leave open) to place them in high-impedance.
5	D	input	Driver data input. Digital input that sets the polarity of the differential driver outputs Y/Z when DE is asserted high.
6	GND	power_in	Device ground reference. Pins 6 and 7 are internally connected; both should be tied to the system ground plane.
7	GND	power_in	Device ground reference. Internally connected to pin 6; both should be tied to the system ground plane.
8	NC	unconnected	No internal connection. Leave floating or tie to ground; no electrical function.
9	Y	output	Non-inverting differential driver output (RS-485/RS-422 bus output, complementary to Z). Drives the transmit pair when DE is high; high-impedance otherwise. Withstands −18 V to +18 V bus voltage.
10	Z	output	Inverting differential driver output (RS-485/RS-422 bus output, complementary to Y). Drives the transmit pair when DE is high; high-impedance otherwise. Withstands −18 V to +18 V bus voltage.
11	B	input	Inverting differential receiver input (RS-485/RS-422 bus input, complementary to A). Presents 1/8 unit load allowing up to 256 nodes on the bus; withstands −18 V to +18 V.
12	A	input	Non-inverting differential receiver input (RS-485/RS-422 bus input, complementary to B). Presents 1/8 unit load allowing up to 256 nodes on the bus; withstands −18 V to +18 V.
13	VCC	power_in	Supply voltage, 3.0 V to 5.5 V (3.3-V to 5-V nominal). Pins 13 and 14 are internally connected; bypass with a local decoupling capacitor to GND.
14	VCC	power_in	Supply voltage, 3.0 V to 5.5 V (3.3-V to 5-V nominal). Internally connected to pin 13; bypass with a local decoupling capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-14
Category	Comm/UART
Pins	14

Ordering variants

Same part, different packaging or reel option.

THVD1452DR
THVD1452DRD
THVD1452DRDGSR
THVD1452DRDGS

CAD (KiCad official)

Symbol: THVD1452DR
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (54 pp, sha256 58ecc4cc07dd1d32, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF