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TCA9509 Datasheet(PDF) 1 Page - Texas Instruments |
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TCA9509 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 14 page 3 2 5 6 6 1 3 2 5 6 7 1 V CCA SCLA SDAA SCLB SDAB EN TCA9509 TCA9509 www.ti.com SCPS225 – JUNE 2011 LEVEL-TRANSLATING I2C/SMBUS BUS REPEATER Check for Samples: TCA9509 1 FEATURES • Two-Channel Bidirectional Buffer • Lockup-Free Operation • I2C Bus and SMBus Compatible • Accommodates Standard Mode and Fast Mode I2C Devices and Multiple Masters • Operating Supply Voltage Range of 0.9 V to 5.5 V on B side • Supports Arbitration and Clock Stretching Across Repeater • Operating Voltage Range of 2.7 V to VCCB - 1V on A Side • Powered-Off High-Impedance I2C bus pins • Voltage-Level Translation From • Supports 400-kHz Fast I2C Bus operating 0.9 V to (VCCB - 1V) and 2.7 V to 5.5 V speeds • Active-High Repeater-Enable Input • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II • Requires no external pull-up resistors on lower-voltage port-A • ESD Protection Exceeds JESD 22 • Open-Drain I2C I/O – 2000-V Human-Body Model (A114-A) • 5.5-V Tolerant I2C and Enable Input Support – 1000-V Charged-Device Model (C101) Mixed-Mode Signal Operation DESCRIPTION/ORDERING INFORMATION This TCA9509 integrated circuit is an I2C bus/SMBus Repeater for use in I2C/SMBus systems. It can also provide bidirectional voltage-level translation (up-translation/down-translation) between low voltages (down to 1.0 V) and higher voltages (2.7 V to 5.5 V) in mixed-mode applications. This device enables I2C and similar bus systems to be extended, without degradation of performance even during level shifting. The TCA9509 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, thus allowing 400-pF bus capacitance on the B-side. This device can also be used to isolate two halves of a bus for voltage and capacitance. The TCA9509 has two types of drivers – A-side drivers and B-side drivers. All inputs and B-side I/O’s are overvoltage tolerant to 5.5V. The A-side I/O ’s are overvoltage tolerant to 5.5V when the device is unpowered (VCCB and/or VCCA=0V. ). ORDERING INFORMATION TA PACKAGES(1) (2) TOP-SIDE MARKING –40°C to 85°C RVH - QFN Tape and reel 7k (1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging. (2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. 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. PRODUCTION DATA information is current as of publication date. Copyright © 2011, Texas Instruments Incorporated 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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