SN75176M from HGSEMI, in a SOP-8. 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	RO	output	Receiver output. When /RE is low: RO = high if (A-B) ≥ -50 mV, RO = low if (A-B) ≤ -200 mV. When /RE is high RO is high-impedance. Fail-safe drives RO high when the bus is open or shorted.
2	/RE	input	Receiver output enable, active low. RO is enabled when /RE = low and Hi-Z when /RE = high. If /RE = high and DE = low, the device enters low-power shutdown mode (I_SHDN ≈ 20 µA typ).
3	DE	input	Driver output enable, active high. When DE = high the differential driver drives A/B; when DE = low the driver outputs are high-impedance. /RE = high together with DE = low puts the device in shutdown.
4	DI	input	Driver (transmit) data input. With DE = high, DI = low forces A low / B high, and DI = high forces A high / B low. V_IH ≥ 2.0 V, V_IL ≤ 0.8 V, hysteresis ~100 mV.
5	GND	power_in	Device ground reference for both driver and receiver.
6	A	bidirectional	Non-inverting differential bus pin. Serves as the non-inverting receiver input and the non-inverting driver output on the RS-485 bus. ±8 kV IEC 61000-4-2 contact / air ESD protected; withstands ±13 V common-mode.
7	B	bidirectional	Inverting differential bus pin. Serves as the inverting receiver input and the inverting driver output on the RS-485 bus. ±8 kV IEC 61000-4-2 contact / air ESD protected; withstands ±13 V common-mode.
8	VCC	power_in	Positive supply rail, 4.5 V ≤ VCC ≤ 5.5 V (7 V absolute max). Bypass with a 0.1 µF ceramic near the pin. Typical Icc ≈ 500 µA, shutdown ≈ 20 µA.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

SN75176M/TR
SN75176MSN65176M/TR
SN75176N
SN75176MSN65176N
SN75176MM/TR
SN75176MSN65176MM/TR

CAD (KiCad official)

Symbol: SN75176M
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HGSEMI datasheet (13 pp, sha256 8e5fdac042fb5787, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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