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TCA9548APWR Datasheet(PDF) 1 Page - Texas Instruments |
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TCA9548APWR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 22 page PW PACKAGE (TOP VIEW) A0 V CC A1 SDA RESET SCL SD0 A2 SC0 SC7 SD1 SD7 SC1 SC6 SD2 SD6 SC2 SC5 SD3 SD5 SC3 SC4 GND SD4 24 1 23 2 22 3 21 4 20 5 19 6 18 7 17 8 16 9 15 10 14 11 13 12 RGE PACKAGE (TOP VIEW) 24 23 22 21 20 7 8 9 10 11 19 12 1 2 3 4 5 6 SD0 SC0 SD1 SC1 SD2 SC2 18 17 16 15 14 13 A2 SC7 SD7 SC6 SD6 SC5 TCA9548A www.ti.com SCPS207A – MAY 2012 – REVISED JULY 2012 LOW VOLTAGE 8-CHANNEL I2C SWITCH WITH RESET Check for Samples: TCA9548A 1 FEATURES • 1-of-8 Bidirectional Translating Switches • Low Standby Current • I2C Bus and SMBus Compatible • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V • Active-Low Reset Input • 5-V-Tolerant Inputs • Address by Three Hardware Address Pins for Use of up to Eight Devices • 400-kHz Fast I2C Bus • Channel Selection Via I2C Bus • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II • Power-Up with All Switch Channels Deselected • ESD Protection Exceeds JESD 22 • Low rON Switches – 2000-V Human-Body Model (A114-A) • Allows Voltage-Level Translation Between 2.5- V, 3.3-V, and 5-V Buses – 200-V Machine Model (A115-A) • No Glitch on Power Up – 1000-V Charged-Device Model (C101) • Supports Hot Insertion DESCRIPTION/ORDERING INFORMATION The TCA9548A has eight bidirectional translating switches that can be controlled via the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register. The system master can reset the TCA9548A in the event of a timeout or other improper operation by asserting a low in the RESET input. Similarly, the power-on reset deselects all channels and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset/initialization to occur without powering down the part. The pass gates of the switches are constructed so that the VCC pin can be used to limit the maximum high voltage, which is passed by the TCA9548A. This allows the use of different bus voltages on each pair, so that 1.8-V or 2.5-V or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant. ORDERING INFORMATION TA PACKAGE(1) (2) ORDERABLE PART NUMBER TOP-SIDE MARKING QFN – RGE Reel of 3000 TCA9548ARGER –40°C to 85°C Reel of 2000 TCA9548APWR TSSOP – PW PW548A Tube of 60 TCA9548APW (1) 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. (2) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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 © 2012, 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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