ISL3178EIBZ-T7A from RENESAS, in a SOIC-8. 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	RO	output	Receiver output: high if A-B ≥ -50mV, low if A-B ≤ -200mV, and high if A and B are floating or shorted.
2	RE	input	Receiver output enable: RO is enabled when RE is low and high impedance when RE is high; if unused, connect to GND directly or through 1kΩ to 3kΩ.
3	DE	input	Driver output enable: driver outputs are enabled when DE is high and high impedance when DE is low; if unused, connect to VCC through 1kΩ to 3kΩ.
4	DI	input	Driver input: a low forces output Y low and Z high, a high forces Y high and Z low.
5	GND	power_in	Ground connection.
6	A/Y	bidirectional	±15kV IEC61000 ESD protected RS-485/422 noninverting receiver input and noninverting driver output; input if DE = 0, output if DE = 1.
7	B/Z	bidirectional	±15kV IEC61000 ESD protected RS-485/422 inverting receiver input and inverting driver output; input if DE = 0, output if DE = 1.
8	VCC	power_in	System power supply input (3.0V to 3.6V).

Key specifications

Parameter	Value
Manufacturer	RENESAS
Package	SOIC-8
Category	Interface ICs
Pins	8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Driver Differential VOUT	VOD	2	2.3		V	RL = 100Ω (RS-422), VCC ≥ 3.15V	7
Driver Differential VOUT	VOD	1.5	2		V	RL = 54Ω (RS-485)	7
Driver Differential VOUT	VOD	1.5	2.2		V	RL = 60Ω, -7V ≤ VCM ≤ 12V	7
Change in Magnitude of Driver Differential VOUT	ΔVOD		0.01	0.2	V	RL = 54Ω or 100Ω	7
Driver Common-Mode VOUT	VOC		2	3	V	RL = 54Ω or 100Ω	7
Change in Magnitude of Driver Common-Mode VOUT	ΔVOC		0.01	0.2	V	RL = 54Ω or 100Ω	7
Logic Input High Voltage	VIH	2			V	DI, DE, RE	7
Logic Input Low Voltage	VIL			0.8	V	DI, DE, RE	7
Logic Input Current	IIN1	-2		2	µA	DI = DE = RE = 0V or VCC	7
Input Current (A/Y, B/Z)	IIN2		80	125	µA	DE = 0V, VCC = 0V or 3.6V, VIN = 12V	7
Input Current (A/Y, B/Z)	IIN2	-100	-50		µA	DE = 0V, VCC = 0V or 3.6V, VIN = -7V	7
Driver Short-Circuit Current	IOSD1	-250		250	mA	DE = VCC, -7V ≤ VY or VZ ≤ 12V	7
Receiver Differential Threshold Voltage	VTH	-200	-125	-50	mV	-7V ≤ VCM ≤ 12V	7
Receiver Output Low Voltage	VOL		0.17	0.4	V	IO = -4mA, VID = -200mV	8
Three-State Receiver Output Current	IOZR	-1	0.015	1	µA	0.4V ≤ VO ≤ 2.4V	8
Receiver Input Resistance	RIN	96	150		kΩ	-7V ≤ VCM ≤ 12V	8
Receiver Short-Circuit Current	IOSR	7	30	60	mA	0V ≤ VO ≤ VCC	8
Receiver Input Hysteresis	VTH		15		mV	VCM = 0V	7
Thermal Shutdown Threshold	TSD		150		°C		8
No-Load Supply Current	ICC		510	800	µA	DI = 0V or VCC, DE = VCC, RE = 0V or VCC	8
No-Load Supply Current	ICC		480	700	µA	DE = 0V, RE = 0V	8
Shutdown Supply Current	ISHDN		0.01	12	µA	DE = 0V, RE = VCC, DI = 0V or VCC	8
Driver Maximum Data Rate	fMAX	20	28		Mbps	VOD = ±1.5V, CD = 350pF	9
Driver Differential Output Delay	tDD		27	40	ns	RDIFF = 54Ω, CD = 50pF	9
Driver Differential Output Skew	tSKEW		1	3	ns	RDIFF = 54Ω, CD = 50pF	9
Driver Output Skew, Part-to-Part	tDSKEW			11	ns	RDIFF = 54Ω, CD = 50pF	9
Driver Differential Rise or Fall Time	tR, tF		9	15	ns	RDIFF = 54Ω, CD = 50pF	9
Driver Enable to Output High	tZH		17	50	ns	RL = 500Ω, CL = 50pF, SW = GND	9
Driver Enable to Output Low	tZL		16	40	ns	RL = 500Ω, CL = 50pF, SW = VCC	9
Driver Disable from Output High	tHZ		25	40	ns	RL = 500Ω, CL = 50pF, SW = GND	9
Driver Disable from Output Low	tLZ		28	50	ns	RL = 500Ω, CL = 50pF, SW = VCC	9
Driver Time to Shutdown	tSHDN	50	200	600	ns		9
Driver Enable from Shutdown to Output High	tZH(SHDN)		180	700	ns	RL = 500Ω, CL = 50pF, SW = GND	9
Driver Enable from Shutdown to Output Low	tZL(SHDN)		90	700	ns	RL = 500Ω, CL = 50pF, SW = VCC	9
Receiver Maximum Data Rate	fMAX	20	35		Mbps	VID = ±1.5V, ISL3176E-78E	9
Receiver Input to Output Delay	tPLH, tPHL	25	33	60	ns	ISL3176E-78E	9
Receiver Skew /tPLH - tPHL/	tSKD		1.5	4	ns		9
Receiver Skew, Part-to-Part	tRSKEW			15	ns		9
Receiver Enable to Output High	tZH	5	11	17	ns	RL = 1kΩ, CL = 15pF, SW = GND, ISL3176E-78E	9
Receiver Enable to Output Low	tZL	5	11	17	ns	RL = 1kΩ, CL = 15pF, SW = VCC, ISL3176E-78E	9
Receiver Disable from Output High	tHZ	4	7	15	ns	RL = 1kΩ, CL = 15pF, SW = GND, ISL3176E-78E	10
Receiver Disable from Output Low	tLZ	4	7	15	ns	RL = 1kΩ, CL = 15pF, SW = VCC, ISL3176E-78E	10
Receiver Time to Shutdown	tSHDN	50	180	600	ns		10
Receiver Enable from Shutdown to Output High	tZH(SHDN)		240	500	ns	RL = 1kΩ, CL = 15pF, SW = GND	10
Receiver Enable from Shutdown to Output Low	tZL(SHDN)		240	500	ns	RL = 1kΩ, CL = 15pF, SW = VCC	10
Supply Voltage (test conditions)	VCC	3	3.3	3.6	V	Electrical Specifications test conditions	7
Operating Temperature Range		-40		85	°C		7
VCC to GND	VCC			7	V		7
Input Voltage DI	DI	-0.3		7	V		7
Input Voltage DE, RE	DE, RE	-0.3		7	V		7
Input/Output Voltage A, B, Y, Z		-8		13	V		7
Input/Output Voltage RO	RO	-0.3			V	upper limit (VCC + 0.3V)	7
Maximum Junction Temperature	TJ			150	°C	Plastic package	7
Storage Temperature Range	TSTG	-65		150	°C		7
Thermal Resistance, 8 Ld SOIC	θJA		105		°C/W	Typical, free air, high-effective thermal conductivity test board	7

CAD (KiCad official)

Symbol: ISL3178EIBZ-T7A
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: isl3178eibz-t7a-etched.step / isl3178eibz-t7a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); isl3178eibz-t7a.step / isl3178eibz-t7a.glb are the bare package body.

Provenance

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

Datasheet: RENESAS datasheet (24 pp, sha256 a078fda83c895dae, retrieved 2026-11-02, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-opus-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

ISL3178EIBZ-T7A

Verified ISL3178EIBZ-T7A

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3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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