SN74LVTH162245 Datasheet PDF - TI

● Members of the Texas Instruments Widebus™ Family

● A-Port Outputs Have Equivalent 22- Series Resistors, So No External Resistors Are Required

● Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)

● Support Unregulated Battery Operation Down to 2.7 V

● Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C

● Ioff and Power-Up 3-State Support Hot Insertion

● Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors

● Distributed VCC and GND Pins Minimize High-Speed Switching Noise

● Flow-Through Architecture Optimizes PCB Layout

● Latch-Up Performance Exceeds 500 mA Per JESD 17

● ESD Protection Exceeds JESD 22

● 2000-V Human-Body Model (A114-A)

● 200-V Machine Model (A115-A)

● 1000-V Charged-Device Model (C101)

●Widebus is a trademark of Texas Instruments.

●## DESCRIPTION/ORDERING INFORMATION

●The "LVTH162245 devices are 16-bit (dual-octal) noninverting 3-state transceivers designed for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.

●These devices can be used as two 8-bit transceivers or one 16-bit transceiver. The devices allow 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.

●The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

●Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

●The A-port outputs, which are designed to source or sink up to 12 mA, include equivalent 22- series resistors to reduce overshoot and undershoot.

●When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, 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.

●These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.