SN74BCT29843 9-BIT BUS-INTERFACE D-TYPE LATCH WITH 3-STATE OUTPUTS

SCBS022C - FEBRUARY 1989 - REVISED NOVEMBER 1993

features

• BiCMOS Process With CMOS Inputs and TTL Outputs Substantially Reduces Standby Current
• Input Has 50 k
• Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (NT)

description

The SN74BCT29843 features 3-state outputs designed specificallyfor driving highly capacitive or relatively low-impedance loads. Itis particularly suitable for implementing wider buffer registers, I/Oports, bidirectional bus drivers with parity, and working registers.

The nine latches are transparent D-type latches. When thelatch-enable (LE) input is high, the Q outputs are complementary tothe noninverting data (D) inputs.

A buffered output-enable () input can be used to place the nine outputs in eithera normal logic state (high or low level) or a high-impedance state.In the high-impedance state, the outputs neither load nor drive thebus lines significantly. The high-impedance state and increased driveprovide the capability to drive bus lines without need for interfaceor pull-up components.

The output enable ()does not affect the internal operation of the flip-flops. Old datacan be retained or new data can be entered while the outputs are inthe high-impedance state.

The SN74BCT29843 is characterized for operation from 0°C to70°C.

View more information about generic part numbers:SN74BCT29843

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