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SN74AVC4T245PW 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74AVC4T245PW 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 18 page SN74AVC4T245 4BIT DUALSUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3STATE OUTPUTS SCES576A – JUNE 2004 – REVISED APRIL 2005 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Control Inputs VIH/VIL Levels are Referenced to VCCA Voltage D Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.2-V to 3.6-V Power-Supply Range D I/Os Are 4.6-V Tolerant D Ioff Supports Partial-Power-Down Mode Operation D Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II D ESD Protection Exceeds JESD 22 − 8000-V Human-Body Model (A114-A) − 150-V Machine Model (A115-A) − 1000-V Charged-Device Model (C101) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCCA 1DIR 2DIR 1A1 1A2 2A1 2A2 GND VCCB 1OE 2OE 1B1 1B2 2B1 2B2 GND D, DGV, OR PW PACKAGE (TOP VIEW) RGY PACKAGE (TOP VIEW) 116 89 2 3 4 5 6 7 15 14 13 12 11 10 1OE 2OE 1B1 1B2 2B1 2B2 1DIR 2DIR 1A1 1A2 2A1 2A2 description/ordering information This 4-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 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.2 V to 3.6 V. The SN74AVC4T245 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V. It is operational with VCCA/VCCB as low as 1.2 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes. The SN74AVC4T245 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 SN74AVC4T245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA. 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. Copyright 2005, 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. 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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