TCA9406DCUR TCA9406YZPR Programmable Logic ICS Voltage Levels Dual Bidirec 1MHz Vltg Lev-Trans
logic integrated circuits
,programmable logic array ic
TCA9406DCUR TCA9406YZPR Programmable Logic ICS Voltage Levels Dual Bidirec 1MHz Vltg Lev-Trans
1 Features
- 2-Bit Bidirectional Translator for SDA and SCL Lines in I2C Applications
-
Provides Bidirectional Voltage Translation With No Direction Pin
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High-Impedance Output SCL_A, SDA_A, SCL_B, SDA_BPinsWhenOE=LoworVCC =0V
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Internal 10-kΩ Pullup Resistor on All SDA and SCL Pins
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1.65Vto3.6VonAportand2.3Vto5.5VonB port (VCCA ≤ VCCB)
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VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
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No Power-Supply Sequencing Required: Either VCCA or VCCB Can Be Ramped First
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LowIoff of2μAWhenEitherVCCA orVCCB =0V
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OE Input Can Be Tied Directly to VCCA Or Controlled By GPIO
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Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
-
ESD Protection Exceeds JESD 22
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– APort
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– 2500-V Human-Body Model (A114-B)
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– 250-V Machine Model (A115-A)
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– 1500-V Charged-Device Model (C101)
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– BPort
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– 8-kV Human-Body Model (A114-B)
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– 250-V Machine Model (A115-A)
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– 1500-V Charged-Device Model (C101)
-
-
2 Applications
-
I2C/SMBus
-
UART
-
GPIO
3 Description
The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input. It is operational from 1.65 V to 3.6 V on the A- side, referenced toVCCA, and from 2.3 V to 5.5 V on the B-side, referenced to VCCB. This allows the device to interface between lower and higher logic signal levels at any of the typical 1.8-V, 2.5-V, 3.3-V, and 5-V supply rails.
The OE input pin is referenced to VCCA, can be tied directly to VCCA, but it is also 5.5-V tolerant. The OE pin can also be controlled and set to a logic low to place all the SCL and SDA pins in a high-impedance state, which significantly reduces the quiescent current consumption.
Under normal I2C and SMBus operation or other open-drain configurations, the TCA9406 can support up to 2 Mbps; therefore, it is compatible with standard I2C speeds where the frequency of SCL is 100 kHz (Standard-mode), 400 kHz (Fast-mode), or 1 MHz (Fast-mode Plus). The device can also be used as a general purpose level translator, and when the A- and B-side ports are both driven with push-pull devices the TCA9406 can support up to 24 Mbps.
The TCA9406 features internal 10-kΩ pullup resistors on SCL_A, SDA_A, SCL_B, and SDA_B. Additional external pullup resistors can be added to the bus to reduce the total pullup resistance and speed up rising edges.
Device Information
|
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
|
TCA9406 |
SM8 (8) |
2.95 mm × 2.80 mm |
|
US8 (8) |
2.30 mm × 2.00 mm |
|
|
DSBGA (8) |
1.90 mm × 0.90 mm |
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