74LVTH16245ADGGRG4 Datasheet

Bus Transceivers


The 74LVTH16245ADGGRG4 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. The devices are designed for asynchronous communication between two data buses. 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 pulldownresistors with the bus-hold circuitry is not recommended.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 circuitrydisables 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. 74LVTH16245ADGGRG4 Features &bull; Members of the Texas Instruments Widebus&trade;Family&bull; State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low Static-Power Dissipation&bull; Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)&bull; Support Unregulated Battery Operation Down to 2.7 V&bull; Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25&deg;C&bull; Distributed VCC and GND Pins Minimize High-Speed Switching Noise&bull; Flow-Through Architecture Optimizes PCB Layout&bull; Ioff and Power-Up 3-State Support Hot Insertion&bull; Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors&bull; Latch-Up Performance Exceeds 500 mA Per JESD 17&bull; ESD Protection Exceeds JESD 22&ndash; 2000-V Human-Body Model (A114-A)&ndash; 200-V Machine Model (A115-A)


[{"Name":"Input Level","Value":"TTL/CMOS"},{"Name":"Output Level","Value":"LVTTL"},{"Name":"High Level Output Current","Value":"- 32 mA"},{"Name":"Low Level Output Current","Value":"64 mA"},{"Name":"Propagation Delay Time","Value":"4.1 ns"},{"Name":"Supply Voltage - Max","Value":"3.6 V"},{"Name":"Supply Voltage - Min","Value":"2.7 V"},{"Name":" Maximum Operating Temperature","Value":"+ 85 C"},{"Name":"Minimum Operating Temperature","Value":"- 40 C"},{"Name":"","Value":""}]

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