74LVTH646

74LVTH646 Low Voltage Octal Transceiver/Register with 3-STATE Outputs

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74LVTH646 Low Voltage Octal Transceiver/Register with 3-STATE Outputs

November 1999 Revised November 2000

74LVTH646 Low Voltage Octal Transceiver/Register with 3-STATE Outputs
General Description
The LVTH646 consists of registered bus transceiver circuits, D-type flip-flops, and control circuitry providing multiplexed transmission of data directly from the input bus or from the internal storage registers. Data on the A or B bus will be loaded into the respective registers on the LOW-toHIGH transition of the appropriate clock pin (CPAB or CPBA). (See Functional Description) The LVTH646 data inputs include bushold, eliminating the need for external pull-up resistors to hold unused inputs. The bus transceivers are designed for low-voltage (3.3V) VCC applications, but with the capability to provide a TTL interface to a 5V environment. The LVTH646 is fabricated with an advanced BiCMOS technology to achieve high speed operation similar to 5V ABT while maintaining low power dissipation.

Features
s Input and output interface capability to systems at 5V VCC s Bushold data inputs eliminate the need for external pull-up resistors to hold unused inputs s Live insertion/extraction permitted s Power Up/Down high impedance provides glitch-free bus loading s Outputs source/sink -32 mA/ 64 mA s Functionally compatible with the 74 series 646 s Latch-up performance exceeds 500 mA s ESD performance: Human-body model 2000V Machine model 200V Charged-device model 1000V

Ordering Code:
Order Number 74LVTH646WM 74LVTH646MTC Package Number M24B MTC24 Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

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Logic Symbols
IEEE/IEC

2000 Fairchild Semiconductor Corporation

DS012017

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