High Speed CMOS Logic Octal Bus Transceivers/Registers With 3-State Outputs

The CD54HC646 and CD74HCT646 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 these 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
CD74HCT646M Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, PLASTIC, SOIC-24
CD74HCT646M96 Texas Instruments High Speed CMOS Logic Octal Bus Transceivers/Registers with 3-State Outputs 24-SOIC -55 to 125
CD74HCT646M96G4 Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOIC-24
CD74HCT646EN Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24, PLASTIC, DIP-24
CD74HCT646H Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, UUC24, DIE
CD74HCT646M96E4 Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, SOIC-24
CD74HCT646E Texas Instruments HCT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24, PLASTIC, DIP-24
CD74HCT646 's PackagesCD74HCT646 's pdf datasheet
CD74HCT646M96 SOIC
CD74HCT646M96E4 SOIC
CD74HCT646M96G4 SOIC




CD74HCT646 Pinout, Pinouts
CD74HCT646 pinout,Pin out
This is one package pinout of CD74HCT646,If you need more pinouts please download CD74HCT646's pdf datasheet.

CD74HCT646 circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

Related Electronics Part Number

Related Keywords:

CD74HCT646 Pb-Free CD74HCT646 Cross Reference CD74HCT646 Schematic CD74HCT646 Distributor
CD74HCT646 Application Notes CD74HCT646 RoHS CD74HCT646 Circuits CD74HCT646 footprint
Hot categories