© 2005 Fairchild Semiconductor Corporation DS011511 www.fairchildsemi.com
November 1992
Revised March 2005
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74ABT574
Octal D-Type Flip-Flop with 3-STATE Outputs
General Description
The ABT574 is an octal flip-flop with a buffered common
Clock (CP) and a buffered common Output Enable (OE).
The information presented to the D inputs is stored in the
flip-flops on the LOW-to-HIGH Clock (CP) transition.
The device is functionally identical to the ABT374 but has
broadside pinouts.
Features
a73 Inputs and outputs on opposite sides of package
allowing easy interface with microprocessors
a73 Useful as input or output port for microprocessors
a73 Functionally identical to ABT374
a73 3-STATE outputs for bus-oriented applications
a73 Output sink capability of 64 mA, source capability
of 32 mA
a73 Guaranteed output skew
a73 Guaranteed multiple output switching specifications
a73 Output switching specified for both 50 pF and
250 pF loads
a73 Guaranteed simultaneous switching, noise level and
dynamic threshold performance
a73 Guaranteed latchup protection
a73 High impedance glitch free bus loading during entire
power up and power down cycle
a73 Non-destructive hot insertion capability

Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Pb-Free package per JEDEC J-STD-020B.
Connection Diagram
Pin Descriptions
Order Number Package Number Package Description
74ABT574CSC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74ABT574CSJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ABT574CMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74ABT574CMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
D
0
–D
7
Data Inputs
CP Clock Pulse Input (Active Rising Edge)
OE 3-STATE Output Enable Input (Active LOW)
O
0
–O
7
3-STATE Outputs