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

These Bus Transceivers and Registers are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL Interface to a 5-V system environment.
The ?LVTH646 devices consist of Bus Transceiver circuits, D-type Flip-Flops and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal Registers 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 ?LVTH646.
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 CAN 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 direction control (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 still is 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 is provided to hold unused or floating data inputs at a valid Logic level. 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
SN74LVTH646DBRG4 Texas Instruments LVT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SSOP-24
SN74LVTH646NSRG4 Texas Instruments LVT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOP-24
SN74LVTH646DGVRG4 Texas Instruments IC LVT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, TVSOP-24, Bus Driver/Transceiver
SN74LVTH646PWRE4 Texas Instruments LVT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, TSSOP-24
SN74LVTH646DWG4 Texas Instruments 3.3-V ABT Octal Bus Transceivers And Registers With 3-State Outputs 24-SOIC -40 to 85
SN74LVTH646PWLE Texas Instruments 3.3-V ABT Octal Bus Transceivers And Registers With 3-State Outputs 24-TSSOP -40 to 85
SN74LVTH646DW Texas Instruments 3.3-V ABT Octal Bus Transceivers And Registers With 3-State Outputs 24-SOIC -40 to 85
SN74LVTH646DWE4 Texas Instruments LVT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOIC-24
SN74LVTH646DBLE Texas Instruments 3.3-V ABT Octal Bus Transceivers And Registers With 3-State Outputs 24-SSOP -40 to 85
SN74LVTH646PWR Texas Instruments 3.3-V ABT Octal Bus Transceivers And Registers With 3-State Outputs 24-TSSOP -40 to 85
SN74LVTH646 's PackagesSN74LVTH646 's pdf datasheet
SN74LVTH646DBLE SSOP
SN74LVTH646DBR SSOP
SN74LVTH646DBRE4 SSOP
SN74LVTH646DBRG4 SSOP
SN74LVTH646DGVR TVSOP
SN74LVTH646DGVRE4 TVSOP
SN74LVTH646DGVRG4 TVSOP
SN74LVTH646DW SOIC
SN74LVTH646DWE4 SOIC
SN74LVTH646DWG4 SOIC
SN74LVTH646DWR SOIC
SN74LVTH646DWRE4 SOIC
SN74LVTH646DWRG4 SOIC
SN74LVTH646NSR SO
SN74LVTH646NSRE4 SO
SN74LVTH646NSRG4 SO
SN74LVTH646PW TSSOP
SN74LVTH646PWE4 TSSOP
SN74LVTH646PWG4 TSSOP
SN74LVTH646PWLE TSSOP
SN74LVTH646PWR TSSOP
SN74LVTH646PWRE4 TSSOP
SN74LVTH646PWRG4 TSSOP




SN74LVTH646 Pinout, Pinouts
SN74LVTH646 pinout,Pin out
This is one package pinout of SN74LVTH646,If you need more pinouts please download SN74LVTH646's pdf datasheet.

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SN74LVTH646 Application Notes SN74LVTH646 RoHS SN74LVTH646 Circuits SN74LVTH646 footprint
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