3.3 V ABT 16-Bit Bus Transceivers And Registers With 3-State Outputs

The 'LVTH16646 devices are 16-bit Bus 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. Data on the A or B bus is clocked into the Registers on the low-to-high transition of the appropriate Clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that CAN be performed with the 'LVTH16646 devices.
Output-enable (OE) and direction-control (DIR) inputs are provided to control the transceiver functions. In the transceiver mode, data present at the high-impedance port may be stored in either Register or in both. The select-control (SAB and SBA) inputs CAN multiplex stored and real-time (transparent mode) data. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. DIR determines which bus receives data when OE is low. In the isolation mode (OE high), A data CAN be stored in one Register and/or B data CAN be stored in the other Register
When an output function is disabled, the input function is still enabled and CAN be used to store and transmit data. Only one of the two buses, A or B, CAN be driven at a time.
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.
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.
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.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN74LVTH16646DLG4 Texas Instruments 3.3 V ABT 16-Bit Bus Transceivers and Registers With 3-State Outputs 56-SSOP -40 to 85
SN74LVTH16646DGGR Texas Instruments 3.3 V ABT 16-Bit Bus Transceivers and Registers With 3-State Outputs 56-TSSOP -40 to 85
SN74LVTH16646DL Texas Instruments 3.3 V ABT 16-Bit Bus Transceivers and Registers With 3-State Outputs 56-SSOP -40 to 85
SN74LVTH16646DLR Texas Instruments 3.3 V ABT 16-Bit Bus Transceivers and Registers With 3-State Outputs 56-SSOP -40 to 85
SN74LVTH16646 's PackagesSN74LVTH16646 's pdf datasheet
74LVTH16646DGGRE4 TSSOP
74LVTH16646DLRG4 SSOP
SN74LVTH16646DGGR TSSOP
SN74LVTH16646DL SSOP
SN74LVTH16646DLG4 SSOP
SN74LVTH16646DLR SSOP




SN74LVTH16646 Pinout, Pinouts
SN74LVTH16646 pinout,Pin out
This is one package pinout of SN74LVTH16646,If you need more pinouts please download SN74LVTH16646's pdf datasheet.

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