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74AVCA164245VRE4 数据表(PDF) 1 Page - Texas Instruments |
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74AVCA164245VRE4 数据表(HTML) 1 Page - Texas Instruments |
1 / 15 page www.ti.com FEATURES DESCRIPTION/ORDERING INFORMATION SN74AVCA164245 16-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS SCES395B – JULY 2002 – REVISED OCTOBER 2005 • Member of the Texas Instruments Widebus™ • Overvoltage-Tolerant Inputs/Outputs Allow Family Mixed-Voltage-Mode Data Communications • DOC™ Circuitry Dynamically Changes Output • Ioff Supports Partial-Power-Down Mode Impedance, Resulting in Noise Reduction Operation Without Speed Degradation • Fully Configurable Dual-Rail Design Allows • Dynamic Drive Capability Is Equivalent to Each Port to Operate Over the Full 1.4-V to Standard Outputs With I OH and IOL of ±24 mA 3.6-V Power-Supply Range at 2.5-V V CC • Latch-Up Performance Exceeds 100 mA Per • Control Inputs V IH/VIL Levels Are Referenced JESD 78, Class II to V CCA Voltage • ESD Protection Exceeds JESD 22 • If Either V CC Input Is at GND, Both Ports Are in – 2000-V Human-Body Model (A114-A) the High-Impedance State – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) 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 SN74AVCA164245 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 SN74AVCA164245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA. 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(1) ORDERABLE PART NUMBER TOP-SIDE MARKING TSSOP – DGG Tape and reel SN74AVCA164245GR AVCA164245 TVSOP – DGV Tape and reel SN74AVCA164245VR WA4245 –40 °C to 85°C VFBGA – GQL Tape and reel SN74AVCA164245KR WA4245 VFBGA – ZQL Tape and reel 74AVCA164245ZQLR (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 is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2002–2005, 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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