TCA9406 Datasheet, PDF (1/19 Pages) Texas Instruments – 2-BIT BIDIRECTIONAL 1MHz, I2C BUS AND SMBUS VOLTAGE-LEVEL TRANSLATOR

TCA9406
www.ti.com
SCPS221 – JULY 2010
2-BIT BIDIRECTIONAL 1MHz, I²C BUS AND SMBUS VOLTAGE-LEVEL TRANSLATOR WITH
8kV HBM ESD
Check for Samples: TCA9406
FEATURES
1
•2 2-Bit Bidirectional Translator for SDA and SCL
Lines in Mixed-Mode I²C Applications
• Lock-Up Free for Bus Isolation when OE
Control Pin referring to V_CCA with 5-V Input
Tolerant
• 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
DCT OR DCU PACKAGE
(TOP VIEW)
SDA_B 1
GND 2
V_CCA 3
SDA_A 4
8 SCL_B
7
V_CCB
6 OE
5 SCL_A
YZP PACKAGE
(BOTTOM VIEW)
SDA_A D1 4 5 D2 SCL_A
V_CCA
GND
C1 3 6 C2
B1 2 7 B2
OE
V_CCB
SDA_B A1 1 8 A2 SCL_B
DESCRIPTION/ORDERING INFORMATION
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. Enable (OE) input is referenced to
V_CCA with a maximum input voltage tolerance of 4.6 V.
The TCA9406 can operate up to 24Mbps in push pull mode and 2Mbps with open drain mod. Its compatible
with a standard I²C bus 100 kHz, 400 kHz and 1 MHz at both sides of A-Port and B-Port.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NanoStar is a trademark of Texas Instruments.
2
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.
Copyright © 2010, Texas Instruments Incorporated