SN74LV245AT

SN74LV245AT www.ti.com SCLS605D – DECEMBER 2004 – REVISED JULY 2013 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS Check for Samples: SN74LV245AT FEATURES 1 Inputs Are TTL-Voltage Compatible 4.5-V to 5.5-V VCC Operation Typical tpd of 3.5 ns at 5 V Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 5 V, TA = 25°C Typical VOHV (Output VOH Undershoot) >2.3 V at VCC = 5 V, TA = 25°C Supports Mixed-Mode Voltage Operation on All Ports Ioff Supports Partial-Power-Down Mode Operation 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 This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. The SN74LV245AT allows data transmission 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 that the buses are effectively 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. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the de...