ISL32273EFVZ from RENESAS, in a TSSOP-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	B1	input	Channel 1 inverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
2	A1	input	Channel 1 noninverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
3	RO1	output	Channel 1 receiver output goes high if A-B ≥ 200mV, goes low if A-B ≤ -200mV, and is high when the inputs are floating.
4	EN	input	Group driver output enable, internally pulled high to VCC; all receiver outputs are high impedance when EN is low and EN is high.
5	RO2	output	Channel 2 receiver output goes high if A-B ≥ 200mV, goes low if A-B ≤ -200mV, and is high when the inputs are floating.
6	A2	input	Channel 2 noninverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
7	B2	input	Channel 2 inverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
8	GND	power_in	Ground connection for the device.
9	B3	input	Channel 3 inverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
10	A3	input	Channel 3 noninverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
11	RO3	output	Channel 3 receiver output goes high if A-B ≥ 200mV, goes low if A-B ≤ -200mV, and is high when the inputs are floating.
12	~EN	input	Group driver output enable (active low), internally pulled high to VCC; outputs are high impedance when EN is high.
13	RO4	output	Channel 4 receiver output goes high if A-B ≥ 200mV, goes low if A-B ≤ -200mV, and is high when the inputs are floating.
14	A4	input	Channel 4 noninverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
15	B4	input	Channel 4 inverting RS-485/RS-422 receiver input, protected to ±16.5kV per IEC61000-4-2.
16	VCC	power_in	System power supply input, 3.0V to 5.5V.

Key specifications

Parameter	Value
Manufacturer	RENESAS
Package	TSSOP-16
Category	Interface ICs
Pins	16

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply voltage VCC	VCC	3		5.5	V		7
Temperature range ISL32x7xEF		-40		125	°C	ISL32x7xEF	7
Bus pin common-mode voltage range		-7		12	V		7
RO output current		-9		9	mA		7
RO load capacitance				6	pF		7
VCC to GND	VCC			7	V		7
EN input voltage (all varieties)	EN	-0.3		7	V		7
A, B input voltages	A, B	-9		13	V		7
Maximum junction temperature (plastic package)				150	°C		7
Maximum storage temperature range		-65		150	°C		7
Thermal resistance junction-to-ambient, 16 Ld TSSOP	JA		104		°C/W	Typical; Notes 6, 9	7
Thermal resistance junction-to-case, 16 Ld TSSOP	JC		25		°C/W	Typical; Notes 6, 9	7
Input high voltage (logic pins)	VIH1	2			V	VCC ≤3.6V	7
Input high voltage (logic pins)	VIH2	2.2			V	VCC ≤ 5.5V	7
Logic input current	IIN1	-15		15	µA	EN, EN, ENX, SHDNEN = 0V or VCC	7
Receiver differential threshold voltage	VTH	-200		200	mV	-7V ≤ VCM ≤ 12V	7
Receiver input hysteresis	VTH		30		mV	VCM = 0V	7
Input current (A, B)	IIN3			0.2	mA	VCC = 0V or 5.5V, VIN = 12V	8
Input current (A, B)	IIN3	-0.2			mA	VCC = 0V or 5.5V, VIN = -7V	8
Receiver input resistance	RIN	48			kΩ	-7V ≤ VCM ≤ 12V	8
Receiver output leakage current	IOZ	-10		10	µA	EN = 0V, 0 ≤ VO ≤ VCC	8
Receiver short-circuit current, 20Mbps versions	IOS	-100		100	mA	EN = 1, 0V ≤ VO ≤ VCC	8
Receiver output high voltage	VOH1	2.4			V	IO = -6mA, VID = 200mV, VCC ≥ 3.0V	8
No load supply current, 20Mbps versions	20ICC			5.5	mA	EN = 1, or EN = 0 (ISL32273E and ISL32277E)	8
Shutdown supply current	ISHDN			15	µA	All outputs disabled (Note 18)	8
ESD RS-485 pins (A, B), IEC61000-4-2 air gap		-16.5		16.5	kV	Air gap, bus pins to GND	8
ESD RS-485 pins (A, B), IEC61000-4-2 contact		-8		8	kV	Contact, bus pins to GND	8
ESD RS-485 pins (A, B), Human Body Model		-15		15	kV	Human Body Model, bus pins to GND	8
ESD all pins Human Body Model		-8		8	kV	HBM	9
ESD Machine Model				500	V		9
Maximum data rate, 20Mbps versions	fMAX	20			Mbps	VID = ±1.5V, CL = 15pF	9
Receiver input to output delay	tPLH, tPHL		37	55	ns	Figure 6	9
Receiver skew /tPLH - tPHL/	tSKD		2.7	6	ns	Figure 6	9
Prop delay skew channel-to-channel	tSKC-C		3	8	ns	Figure 6, Note 11	9
Prop delay skew part-to-part	tSKP-P		4	20	ns	Figure 6, Note 12	9
Receiver disable from output high	tHZ		19	30	ns	RL = 1kΩ, CL = 15pF, SW = GND (Figure 7)	9
Receiver disable from output low	tLZ		19	30	ns	RL = 1kΩ, CL = 15pF, SW = VCC (Figure 7)	9
Receiver enable from shutdown to output high	tZH(SHDN)			850	ns	RL = 1kΩ, CL = 15pF, SW = GND (Figure 7, Notes 16, 20)	9
Receiver enable from shutdown to output low	tZL(SHDN)			850	ns	RL = 1kΩ, CL = 15pF, SW = VCC (Figure 7, Notes 16, 20)	9

CAD (KiCad official)

Symbol: ISL32273EFVZ
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)
3D model files: isl32273efvz-etched.step / isl32273efvz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); isl32273efvz.step / isl32273efvz.glb are the bare package body.

Provenance

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

Datasheet: RENESAS datasheet (23 pp, sha256 644e4e76e1e830b9, retrieved 2026-11-02, tier: manufacturer)
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).

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ISL32273EFVZ

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3D Model

Symbol & Footprint

Schematic Symbol

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