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SN74AVCBH324245 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74AVCBH324245 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 14 page www.ti.com FEATURES DESCRIPTION/ORDERING INFORMATION SN74AVCBH324245 32-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS SCES550B – FEBRUARY 2004 – REVISED JUNE 2005 • Inputs/Outputs Can Tolerate up to 4.6 V, Which Allows Mixed-Voltage-Mode Data • Member of the Texas Instruments Widebus+™ Communications Family • Ioff Supports Partial-Power-Down Mode • DOC™ Circuitry Dynamically Changes Output Operation Impedance, Resulting in Noise Reduction Without Speed Degradation • Fully Configurable Dual-Rail Design Allows Each Port to Operate Over Full 1.4-V to 3.6-V • Dynamic Drive Capability Is Equivalent to Power-Supply Range Standard Outputs With IOH and IOL of • Bus Hold on Data Inputs Eliminates the Need – ±24 mA at 3-V V CC for External Pullup/Pulldown Resistors – ±15 mA at 2.3-V V CC • Latch-Up Performance Exceeds 100 mA Per – ±9 mA at 1.65-V V CC JESD 78, Class II – ±6 mA at 1.4-V V CC • ESD Protection Exceeds JESD 22 • Control Inputs VIH/VIL Levels Are Referenced – 2000-V Human-Body Model (A114-A) to VCCB Voltage – 200-V Machine Model (A115-A) • If Either VCC Input Is at GND, Both Ports Are in – 1000-V Charged-Device Model (C101) the High-Impedance State This 32-bit 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 SN74AVCBH324245 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 is used to disable the outputs, so the buses effectively are isolated. The SN74AVCBH324245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCB. 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 VCCB 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, both ports are in the high-impedance state. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING LFBGA – GKE Tape and reel SN74AVCBH324245KR –40°C to 85°C WN4245 LFBGA – ZKE Tape and reel 74AVCBH324245ZKER (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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. Widebus+, DOC are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2005, 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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