Octal Bus Transceivers And Registers With 3-State Outputs

The SN74HCT646 devices consist of bus-transceiver circuits with 3-state outputs, 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 ?HCT646 devices.
Output-enable (OE) and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the high-impedance port CAN be stored in either or both Registers
The select-control (SAB and SBA) inputs CAN multiplex stored and real-time (transparent mode) data. DIR determines which bus receives data when OE is active (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 data. Only one of the two buses, A or B, CAN be driven at a time.
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.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN74HCT646NTE4 Texas Instruments Octal Bus Transceivers And Registers With 3-State Outputs 24-PDIP -40 to 85
SN74HCT646DWE4 Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOIC-24
SN74HCT646DWG4 Texas Instruments Octal Bus Transceivers And Registers With 3-State Outputs 24-SOIC -40 to 85
SN74HCT646NT Texas Instruments Octal Bus Transceivers And Registers With 3-State Outputs 24-PDIP -40 to 85
SN74HCT646NT3 Texas Instruments Octal Bus Transceivers And Registers With 3-State Outputs 24-PDIP -40 to 85
SN74HCT646DW Texas Instruments Octal Bus Transceivers And Registers With 3-State Outputs 24-SOIC -40 to 85
SN74HCT646DWR Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOIC-24
SN74HCT646DWRE4 Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOIC-24
SN74HCT646DWRG4 Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOIC-24
SN74HCT646 's PackagesSN74HCT646 's pdf datasheet
SN74HCT646DW SOIC
SN74HCT646DWE4 SOIC
SN74HCT646DWG4 SOIC
SN74HCT646DWR SOIC
SN74HCT646DWRE4 SOIC
SN74HCT646DWRG4 SOIC
SN74HCT646NT PDIP
SN74HCT646NT3 PDIP
SN74HCT646NTE4 PDIP




SN74HCT646 Pinout, Pinouts
SN74HCT646 pinout,Pin out
This is one package pinout of SN74HCT646,If you need more pinouts please download SN74HCT646's pdf datasheet.

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