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DS34C87TM

Texas Instruments · RS-485 / RS-422 ICs · SOIC-16

DS34C87TM from Texas Instruments, in a SOIC-16. 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	INPUT A	input	Channel A TTL/CMOS data input; the device is TTL input compatible and accepts TTL or CMOS levels.
2	OUTPUT A - True	tri_state	Non-inverting RS-422 differential line driver output for Channel A, with RS-422 output levels.
3	OUTPUT A - Inverting	tri_state	Inverting RS-422 differential line driver output for Channel A, with RS-422 output levels.
4	A/B CONTROL	input	Enable pin for Channels A and B, active high, with TTL/CMOS levels.
5	OUTPUT B - Inverting	tri_state	Inverting RS-422 differential line driver output for Channel B, with RS-422 output levels.
6	OUTPUT B - True	tri_state	Non-inverting RS-422 differential line driver output for Channel B, with RS-422 output levels.
7	INPUT B	input	Channel B TTL/CMOS data input; the device is TTL input compatible and accepts TTL or CMOS levels.
8	GND	power_in	Ground pin (0 V).
9	INPUT C	input	Channel C TTL/CMOS data input; the device is TTL input compatible and accepts TTL or CMOS levels.
10	OUTPUT C - True	tri_state	Non-inverting RS-422 differential line driver output for Channel C, with RS-422 output levels.
11	OUTPUT C - Inverting	tri_state	Inverting RS-422 differential line driver output for Channel C, with RS-422 output levels.
12	C/D CONTROL	input	Enable pin for Channels C and D, active high, with TTL/CMOS levels.
13	OUTPUT D - Inverting	tri_state	Inverting RS-422 differential line driver output for Channel D, with RS-422 output levels.
14	OUTPUT D - True	tri_state	Non-inverting RS-422 differential line driver output for Channel D, with RS-422 output levels.
15	INPUT D	input	Channel D TTL/CMOS data input; the device is TTL input compatible and accepts TTL or CMOS levels.
16	VCC	power_in	Power supply pin, 5.0 V typical; operating supply range is 4.50 V to 5.50 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Interface
Pins	16

CAD (KiCad official)

Symbol: DS34C87TM
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)
3D model files: ds34c87tm-etched.step / ds34c87tm-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ds34c87tm.step / ds34c87tm.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (14 pp, sha256 882c91d47fea0970, retrieved 2026-10-08, tier: lcsc)
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