PCA9306 Texas instruments

PCA9306

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PCA9306

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Описание

The PCA9306 device is a dual bidirectional I2C and SMBus voltage-level translator with an enable (EN) input, and is operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.The PCA9306 device allows bidirectional voltage translations between 1.2 V and 5 V, without the use of a direction pin. The low ON-state resistance (RON) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.In addition to voltage translation, the PCA9306 device can be used to isolate a 400-kHz bus from a 100-kHz bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.

2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I²C Applications
I²C and SMBus compatible
Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I²C devices and multiple controllers
Allows voltage-level translation between
- 1.2-V V_REF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V V_REF2
- 1.8-V V_REF1 and 2.5-V, 3.3-V, or 5-V V_REF2
- 2.5-V V_REF1 and 3.3-V or 5-V V_REF2
- 3.3-V V_REF1 and 5-V V_REF2
Provides bidirectional voltage translation with no direction pin
Low 3.5-Ω ON-state resistance between input and output ports provides less signal distortion
Open-drain I²C I/O ports (SCL1, SDA1, SCL2, and SDA2)
5-V Tolerant I²C 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-circuit-board 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)

Features	Enable pin
Frequency (max) (MHz)	0.4
VCCA (min) (V)	1.2
VCCA (max) (V)	3.3
VCCB (min) (V)	1.8
VCCB (max) (V)	5.5
Supply restrictions	VCCA
Rating	Catalog
Operating temperature range (°C)	-40 to 85