SN65HVD34DR 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; must be left floating.
2	R	output	Receive data output (digital output). Driven by the differential receiver comparing bus inputs A and B.
3	RE	input	Receiver enable, active low (digital input). Drive low to enable the receiver; drive high to place the R output in high-impedance.
4	DE	input	Driver enable, active high (digital input). Drive high to enable the driver outputs Y and Z; drive low to place them in high-impedance.
5	D	input	Driver data input (digital input). Logic level presented at D drives the differential Y/Z outputs when DE is asserted.
6	GND	power_in	Local device ground / reference potential. Pins 6 and 7 are connected together internally.
7	GND	power_in	Local device ground / reference potential. Pins 6 and 7 are connected together internally.
8	NC	unconnected	No internal connection; must be left floating.
9	Y	output	Non-inverting driver bus output (complementary to Z). Together with Z forms the differential RS-485/RS-422 transmit pair.
10	Z	output	Inverting driver bus output (complementary to Y). Together with Y forms the differential RS-485/RS-422 transmit pair.
11	B	input	Inverting receiver bus input (complementary to A). Together with A forms the differential RS-485/RS-422 receive pair.
12	A	input	Non-inverting receiver bus input (complementary to B). Together with B forms the differential RS-485/RS-422 receive pair.
13	VCC	power_in	3-V to 3.6-V supply input. Pins 13 and 14 are connected together internally; both must be tied to the supply rail and decoupled.
14	VCC	power_in	3-V to 3.6-V supply input. Pins 13 and 14 are connected together internally; both must be tied to the supply rail and decoupled.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN65HVD34DRD
SN65HVD34DRRHL

CAD (KiCad official)

Symbol: SN65HVD34DR
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 (47 pp, sha256 4f90059e9caf3d07, 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