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SN74AVCAH164245VR Fiches technique(PDF) 1 Page - Texas Instruments |
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SN74AVCAH164245VR Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 15 page SN74AVCAH164245 16BIT DUALSUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3STATE OUTPUTS SCES396A − JULY 2002 − REVISED MAY 2004 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Member of the Texas Instruments Widebus Family D DOC Circuitry Dynamically Changes Output Impedance, Resulting in Noise Reduction Without Speed Degradation D Dynamic Drive Capability Is Equivalent to Standard Outputs With IOH and IOL of ±24 mA at 2.5-V VCC D Control Inputs VIH/VIL Levels are Referenced to VCCA Voltage D If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State D Overvoltage-Tolerant Inputs/Outputs Allow Mixed-Voltage-Mode Data Communications D Ioff Supports Partial-Power-Down Mode Operation D Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.4-V to 3.6-V Power-Supply Range D Bus Hold on Data Inputs Eliminates the Need for External Pullup / Pulldown Resistors D Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II D ESD Protection Exceeds JESD 22 − 2000-V Human-Body Model (A114-A) − 200-V Machine Model (A115-A) − 1000-V Charged-Device Model (C101) description/ordering information This 16-bit (dual-octal) noninverting bus transceiver uses two separate configurable power-supply rails. The A-port is designed to track VCCA. VCCA accepts any supply voltage from 1.4 V to 3.6 V. The B-port is designed to track VCCB. VCCB accepts any supply voltage from 1.4 V to 3.6 V. This allows for universal low-voltage bidirectional translation between any of the 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes. The SN74AVCAH164245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the outputs so the buses are effectively isolated. The SN74AVCAH164245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. To ensure the high-impedance state during power up or power down, OE should be tied to VCCA through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. If either VCC input is at GND, then both ports are in the high-impedance state. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING TSSOP − DGG Tape and reel SN74AVCAH164245GR AVCAH164245 −40 °C to 85°C TVSOP − DGV Tape and reel SN74AVCAH164245VR WAH4245 −40 C to 85 C VFBGA − GQL Tape and reel SN74AVCAH164245KR WAH4245 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2004, Texas Instruments Incorporated 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. DOC and Widebus are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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