PCA9306-Q1

Voltage-Level Translator

The PCA9306-Q1 is a voltage-level translator from Texas Instruments. View the full PCA9306-Q1 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Key Specifications

Parameter	Value
Channel Type	Bidirectional
Channels per Circuit	2
Features	Auto-Direction Sensing
Mounting Type	Surface Mount
Number of Circuits	1
Operating Temperature	-40°C ~ 105°C (TA)
Output Type	Open Drain, Push-Pull
Package / Case	8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
Supplier Device Package	SM8
Translator Type	Voltage Level
Voltage - VCCA	1.2 V ~ 3.3 V
Voltage - VCCB	1.8 V ~ 5.5 V

Overview

Part: PCA9306 — Texas Instruments

Type: Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator

Description: A dual bidirectional I2C and SMBus voltage-level translator with an enable input, operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2, allowing voltage translation between 1.2 V and 5 V without a direction pin.

Operating Conditions:

Supply voltage VREF1: 1.2–3.3 V
Supply voltage VREF2: 1.8–5.5 V
Operating free-air temperature (TA): -40 to +85 °C

Absolute Maximum Ratings:

Max supply voltage VREF1: 4 V
Max supply voltage VREF2: 6.5 V
Max junction/storage temperature (Tstg): -65 to +150 °C

Key Specs:

ON-state resistance (RON): 3.5 Ω (VREF1 = 1.2 V, VREF2 = 1.8 V to 5.5 V, TA = 25 °C)
Propagation delay (tPLH, tPHL): < 1.5 ns (VREF1 = 1.2 V, VREF2 = 1.8 V, CL = 50 pF)
Quiescent supply current (ICC): 1 μA (VREF1 = 3.3 V, VREF2 = 5.5 V, EN = 0 V, TA = 25 °C)
Input capacitance (CI): 3 pF (VREF1 = 3.3 V, VREF2 = 5.5 V, TA = 25 °C)
Output leakage current (IOZL): 0.1 μA (VREF1 = 3.3 V, VREF2 = 5.5 V, EN = 0 V, TA = 25 °C)
ESD Protection HBM: 2000 V
ESD Protection CDM: 1000 V

Features:

2-Bit Bidirectional Translator for SDA and SCL Lines
I2C and SMBus Compatible
Less Than 1.5-ns Maximum Propagation Delay
Allows Voltage-Level Translation Between 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
Provides Bidirectional Voltage Translation With No Direction Pin
Low 3.5Ω ON-State Resistance
Open-Drain I2C I/O Ports
5-V Tolerant I2C I/O Ports
High-Impedance SCL1, SDA1, SCL2, and SDA2 Pins for EN = Low
Lockup-Free Operation for Isolation When EN = Low
Flow-Through Pinout

Applications:

I2C, SMBus, PMBus, MDIO, UART, Low-Speed SDIO, GPIO, and Other Two-Signal Interfaces
Servers
Routers (Telecom Switching Equipment)
Personal Computers
Industrial Automation

Package:

SSOP (8)
VSSOP (8)
X2SON (8)
DSBGA (8)

Features

1 · 2-Bit Bidirectional Translator for SDA and SCL Lines in Mixed-Mode I 2 C Applications
I 2 C and SMBus Compatible
Less Than 1.5-ns Maximum Propagation Delay to Accommodate Standard-Mode and Fast-Mode I 2 C Devices and Multiple Masters
Allows Voltage-Level Translation Between
-1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
-1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
-2.5-V VREF1 and 3.3-V or 5-V VREF2
-3.3-V VREF1 and 5-V VREF2
Provides Bidirectional Voltage Translation With No Direction Pin
Low 3.5Ω ON-State Resistance Between Input and Output Ports Provides Less Signal Distortion
Open-Drain I 2 C I/O Ports (SCL1, SDA1, SCL2, and SDA2)
5-V Tolerant I 2 C I/O Ports to Support Mixed-Mode Signal Operation
High-Impedance SCL1, SDA1, SCL2, and SDA2 Pins for EN = Low
Lockup-Free Operation for Isolation When EN = Low
Flow-Through Pinout for Ease of Printed-CircuitBoard Trace Routing
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
-2000-V Human-Body Model (A114-A)
-1000-V Charged-Device Model (C101)

Applications

I 2 C, SMBus, PMBus, MDIO, UART, Low-Speed SDIO, GPIO, and Other Two-Signal Interfaces
Servers
Routers (Telecom Switching Equipment)
Personal Computers
Industrial Automation

Pin Configuration

Electrical Characteristics

over recommended operating ambient temperature range (unless otherwise noted)

PARAMETER	PARAMETER	PARAMETER	TEST CONDITIONS	TEST CONDITIONS	TEST CONDITIONS	MIN	TYP (1)	MAX	UNIT
V IK	Input clamp voltage	Input clamp voltage	I I = -18 mA,	EN = 0 V	EN = 0 V			-1.2	V
I IH	Input leakage current	Input leakage current	V I = 5 V,	EN = 0 V	EN = 0 V			5	μ A
C i(EN)	Input capacitance	Input capacitance	V I = 3 V or 0				11		pF
C io(off)	Off capacitance	SCLn, SDAn	V O = 3 V or 0,	EN = 0 V	EN = 0 V		4	6	pF
C io(on)	On capacitance	SCLn, SDAn	V O = 3 V or 0,	EN = 3 V	EN = 3 V		10.5	12.5	pF
R ON (2)	On-state resistance	SCLn, SDAn	V I = 0		EN = 4.5 V		3.5	5.5	Ω
R ON (2)	On-state resistance	SCLn, SDAn	V I = 0	I O = 64 mA	EN = 3 V		4.7	7	Ω
R ON (2)	On-state resistance	SCLn, SDAn	V I = 0		EN = 2.3 V		6.3	9.5	Ω
R ON (2)	On-state resistance	SCLn, SDAn	V I = 0	I O = 15 mA	EN = 1.5 V		25.5	32	Ω
R ON (2)	On-state resistance	SCLn, SDAn	V I = 2.4 V (3)	I O = 15 mA	EN = 4.5 V	1	6	15	Ω
R ON (2)	On-state resistance	SCLn, SDAn	V I = 2.4 V (3)	I O = 15 mA	EN = 3 V	20	60	140	Ω
R ON (2)	On-state resistance	SCLn, SDAn	V I = 1.7 V (3)	I O = 15 mA	EN = 2.3 V	20	60	140	Ω

Absolute Maximum Ratings

over operating ambient temperature range (unless otherwise noted)

			MIN	MAX	UNIT
V REF1	DC reference voltage range	DC reference voltage range	-0.5	7	V
V REF2	DC reference bias voltage range	DC reference bias voltage range	-0.5	7	V
V I	Input voltage range (2)	Input voltage range (2)	-0.5	7	V
V I/O	Input/output voltage range (2)	Input/output voltage range (2)	-0.5	7	V
	Continuous channel current	Continuous channel current		128	mA
I IK	Input clamp current	V I < 0		-50	mA
T j(max)	Maximum junction temperature	Maximum junction temperature		125	°C
T stg	Storage temperature range	Storage temperature range	-65	150	°C

Recommended Operating Conditions

			MIN	MAX	UNIT
V I/O	Input/output voltage	SCL1, SDA1, SCL2, SDA2	0	5.5	V
V REF1 (1)	Reference voltage	Reference voltage	0	5.5	V
V REF2 (1)	Reference voltage	Reference voltage	0	5.5	V
EN	Enable input voltage	Enable input voltage	0	5.5	V
I PASS	Pass switch current	Pass switch current		64	mA
T A	Operating ambient temperature	Operating ambient temperature	-40	85	°C

Thermal Information

		PCA9306	PCA9306	PCA9306	PCA9306
THERMAL METRIC (1)	THERMAL METRIC (1)	DCT	DCU	DQE	YZT
		8 PINS	8 PINS	8 PINS	8 PINS
R θ JA	Junction-to-ambient thermal resistance	189.6	210.1	246.5	125.5
R θ JC(top)	Junction-to-case (top) thermal resistance	119.6	81.9	149.1	1
R θ JB	Junction-to-board thermal resistance	102.1	88.8	100	62.7
ψ JT	Junction-to-top characterization parameter	44.5	8.3	17.1	3.4
ψ JB	Junction-to-board characterization parameter	101	88.4	99.8	62.7

Typical Application

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
PCA9306	Texas Instruments	—
PCA9306DCTR	Texas Instruments	SM-8
PCA9306DCTT	Texas Instruments	—
PCA9306DCUR	Texas Instruments	—
PCA9306DCUT	Texas Instruments	—
PCA9306DQER	Texas Instruments	—
PCA9306YZTR	Texas Instruments	—

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

Get structured datasheet data via API

Get started free