SN54ABT574, SN74ABT574A OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS

SCBS191C - JANUARY 1991 - REVISED JANUARY 1997

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features

State-of-the-Art EPIC-IIB^TM BiCMOS Design Significantly Reduces Power Dissipation
ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
Typical V_OLP (Output Ground Bounce) < 1 V at V_CC = 5 V, T_A = 25°C
High-Drive Outputs (-32-mA I_OH, 64-mA I_OL)
Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), Plastic (N) and Ceramic (J) DIPs, and Ceramic Flat (W) Package

EPIC-IIB is a trademark of Texas Instruments

description

These 8-bit flip-flops feature 3-state outputs designedspecifically for driving highly capacitive or relativelylow-impedance loads. They are particularly suitable for implementingbuffer registers, I/O ports, bidirectional bus drivers, and workingregisters.

The eight flip-flops of the SN54ABT574 and SN74ABT574A areedge-triggered D-type flip-flops. On the positive transition of theclock (CLK) input, the Q outputs are set to the logic levels set upat the data (D) inputs.

A buffered output-enable () input can be used to place the eight outputs in eithera normal logic state (high or low logic levels) or a high-impedancestate. In the high-impedance state, the outputs neither load nordrive the bus lines significantly. The high-impedance state andincreased drive provide the capability to drive bus lines withoutneed for interface or pullup components.

does not affectthe internal operations of the flip-flops. Old data can be retainedor new data can be entered while the outputs are in thehigh-impedance state.

To ensure the high-impedance state during power up or power down, should be tiedto V_CC through a pullup resistor; the minimum value of theresistor is determined by the current-sinking capability of thedriver.

The SN54ABT574 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. TheSN74ABT574A is characterized for operation from -40°C to85°C.

Title: OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
Product Family: D-TYPE (3-STATE) FLIP-FLOPS
Device Functionality: OCTAL D-TYPE FLIP-FLOP
Orderable Devices: SNJ54ABT574FK, SNJ54ABT574J, SNJ54ABT574W, SN74ABT574ADBLE, SN74ABT574ADW, SN74ABT574ADWR, SN74ABT574AN, SN74ABT574APWLE

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View more information about generic part numbers:SN54ABT574, SN74ABT574A

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