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SN74LVC245ADWRE4 数据表(PDF) 1 Page - Texas Instruments |
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SN74LVC245ADWRE4 数据表(HTML) 1 Page - Texas Instruments |
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1 / 23 page  1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 DIR A1 A2 A3 A4 A5 A6 A7 A8 GND VCC OE B1 B2 B3 B4 B5 B6 B7 B8 DB, DGV, DW, N, NS, OR PW PACKAGE (TOP VIEW) RGY PACKAGE (TOP VIEW) 1 20 10 11 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 12 OE B1 B2 B3 B4 B5 B6 B7 A1 A2 A3 A4 A5 A6 A7 A8 SN74LVC245A www.ti.com SCAS218U – JANUARY 1993 – REVISED FEBRUARY 2010 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS Check for Samples: SN74LVC245A 1 FEATURES • Operates From 1.65 V to 3.6 V • Inputs Accept Voltages to 5.5 V • Max tpd of 6.3 ns at 3.3 V • Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C • Typical VOHV (Output VOH Undershoot) >2 V at VCC = 3.3 V, TA = 25°C • Ioff Supports Partial-Power-Down Mode Operation • Supports Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V VCC) • Latch-Up Performance Exceeds 250 mA Per JESD 17 • ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 1000-V Charged-Device Model (C101) DESCRIPTION/ORDERING INFORMATION This octal bus transceiver is designed for 1.65-V to 3.6-V VCC operation. The SN74LVC245A 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 device so the buses effectively are isolated. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in a mixed 3.3-V/5-V system environment. 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. 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 © 1993–2010, 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. |
类似零件编号 - SN74LVC245ADWRE4 |
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类似说明 - SN74LVC245ADWRE4 |
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