TCA9406DCTR Datasheet, PDF (1/21 Pages) Texas Instruments – 2-BIT BIDIRECTIONAL 1MHz, I2C BUS AND SMBUS VOLTAGE-LEVEL TRANSLATOR WITH 8kV HBM ESD

TCA9406
www.ti.com
SCPS221B – OCTOBER 2010 – REVISED JUNE 2013
2-BIT BIDIRECTIONAL 1MHz, I²C BUS AND SMBUS VOLTAGE-LEVEL TRANSLATOR WITH
8kV HBM ESD
Check for Samples: TCA9406
FEATURES
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• 2-Bit Bidirectional Translator for SDA and SCL
Lines in Mixed-Mode I²C Applications
• 5.5-V Tolerant OE Input
• Level Translation Range
– 1.8 V to 2.5 V/3.3 V/5 V
– 2.5 V to 2.5 V/3.3 V/5 V
– 3.3 V to 3.3 V/5 V
• Internal10-kΩ Pullup Resistor on Each Port
and Option to Add External Pullup Resistor if
Required
• Provides Bidirectional Voltage Translation
With No Direction Pin
• I_off Support Partial Power Down (V_CC= 0 V)
With 2 mA
• High-Impedance Output SCL1, SDA1, SCL2,
and SDA2 Pins When OE = Low or V_CC= 0 V
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– A Port
– 2500-V Human-Body Model (A114-B)
– 250-V Machine Model (A115-A)
– 1500-V Charged-Device Model (C101)
– B Port
– 8-kV Human-Body Model (A114-B)
– 250-V Machine Model (A115-A)
– 1500-V Charged-Device Model (C101)
TYPICAL LEVEL-SHIFTER
APPLICATIONS
• I²C/SMBus
• UART
• GPIO
DCU PACKAGE
(TOP VIEW)
SDA_B 1
8
GND 2
7
V_CCA 3
6
SDA_A 4
5
SCL_B
V_CCB
OE
SCL_A
YZP PACKAGE
(BOTTOM VIEW)
SDA_A D1 4 5 D2 SCL_A
V_CCA C1 3 6 C2 _OE
GND B1 2 7 B2 ^VCCB
SDA_B A1 1 8 A2 SCL_B
DQM PACKAGE
(TOP VIEW)
SDA_A 1
V_CCA 2
GND 3
SDA_B 4
8 SCL_A
7 OE
6 V_CCB
5 SCL_B
DESCRIPTION
The TCA9406 is a dual bidirectional I²C-Bus and SMBus Voltage-Level translator with enable (OE) Input. It is
operational from 1.65 V to 3.6 V on A-Port and 2.3 V to 5.5 V on B-port. The Output Enable (OE) input is
referenced to V_CCA, but is 5.5V tolerant
The device can also be used as a general purpose level-translator, supporting push-pull driving of the A and
B ports. When driven with push-pull devices on both sides the TCA9406 can support up to 24Mps.
Under normal I2C and SMBus operation or other open drain configurations, the device can support up to
2Mbps. It is compatible with a standard I²C bus 100 kHz, 400 kHz and 1 MHz at both sides of A-Port and B-
Port.
The TCA9406 features internal 10kOHM pullup resistors. Additional external pullup resistors can be added to
the bus to reduce total pullup resistance.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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