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SN74LVC646A

PinoutSpecificationsSupply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 6.5 VInput voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 6.5 V Voltage range applie...

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SN74LVC646A: PinoutSpecificationsSupply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 6.5 VInput voltage range, VI (see Note 1) . . . . . ...

SN74LVC646A Data Sheet

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Part Number:
SN74LVC646A
Supply Ability:
5000

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  • 1~5000
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  • 15 Days
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Product Details

Description



Pinout

Connection Diagram


Specifications

Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 6.5 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 6.5 V
Voltage range applied to any output in the high-impedance or power-off state, VO
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .0.5 V to 6.5 V
Voltage range applied to any output in the high or low state, VO
(see Notes 1 and 2) 0.5 V to VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .50 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .50 mA
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±50 mA
Continuous current through each VCC or GND . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .±100 mA
Package thermal impedance, JA (see Note 3): DGG package . . . . . . . . . . . . .. . . . . . . . . . . . .70°C/W
                                                                         DGV package . . . . . . . . . . . . . . . . . . . . . . . . . .58°C/W
                                                                         DL package . . . . . . . . . . . .. . . . . . .. . . . . . . . . . .63°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65°C to 150°C
1. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The value of VCC is provided in the recommended operating conditions table.
3. The package thermal impedance is calculated in accordance with JESD 51-7.


Description

The SN54LVC646A octal bus transceiver and register is designed for 2.7-V to 3.6-V VCC operation and the SN74LVC646A octal bus transceiver and register is designed for 1.65-V to 3.6-V VCC operation.

These devices SN74LVC646A 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 are performed with the 'LVC646A.

SN74LVC646A Output-enable (OE) and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the high-impedance port is stored in either register or in both.

The SN74LVC646A select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. DIR determines which bus receives data when OE is low. In the isolation mode (OE high), A data is stored in one register and B data can be stored in the other register.

When an output function is disabled, the SN74LVC646A 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.




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