PCA9306

Part: PCA9306 — Texas Instruments

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

Description: 2-bit bidirectional I²C/SMBus level translator with enable input, supporting 1.2–3.3 V VREF1 and 1.8–5.5 V VREF2, with 3.5 Ω typical ON-state resistance and less than 1.5 ns maximum propagation delay.

Operating Conditions:

• Reference voltage (VREF1, VREF2): 0–5.5 V (VREF1 operational 1.2–3.3 V, VREF2 operational 1.8–5.5 V per description)
• Operating ambient temperature: -40 to 85 °C
• I/O voltage (SCL1, SDA1, SCL2, SDA2): 0–5.5 V
• Pass switch current: 64 mA max

Absolute Maximum Ratings:

• Max reference voltage (VREF1, VREF2): 7 V
• Max input voltage / input/output voltage: 7 V
• Max continuous channel current: 128 mA
• Max junction temperature: 125 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• ON-state resistance between input and output ports: 3.5 Ω
• Maximum propagation delay: less than 1.5 ns
• I/O ports: open-drain, 5 V tolerant
• Enable input voltage: 0–5.5 V
• Pass switch current: 64 mA max (recommended)
• Input clamp current: -50 mA max (VI < 0)
• ESD: 2000 V HBM, 1000 V CDM
• Latch-up performance exceeds 100 mA per JESD 78, Class II

Features:

• Bidirectional voltage translation with no direction pin
• I²C and SMBus compatible
• Translates between 1.2 V and 5 V rails (e.g., 1.2 V to 1.8/2.5/3.3/5 V; 3.3 V to 5 V)
• High-impedance I/O pins when EN is low
• Lockup-free operation for isolation when EN is low
• Can isolate a 400 kHz bus from a 100 kHz bus via EN
• Flow-through pinout for easy PCB routing

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): 2.95 mm × 2.80 mm
• VSSOP (8): 2.30 mm × 2.00 mm
• X2SON (8): 1.40 mm × 1.00 mm
• DSBGA (8): 1.98 mm × 0.98 mm

• 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)

• 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

over recommended operating ambient temperature range (unless otherwise noted)

over operating ambient temperature range (unless otherwise noted)