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MC74AC57

Motorola
Part Number MC74AC57
Manufacturer Motorola
Description OCTAL D-TYPE FLIP-FLOP
Published Oct 14, 2006
Detailed Description www.DataSheet4U.com MC74AC57 MC74ACT574 Octal DĆType FlipĆFlop with 3ĆState Outputs The MC74AC574/74ACT574 is a high-sp...
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MC74AC57
MC74AC57


Overview
www.
DataSheet4U.
com MC74AC57 MC74ACT574 Octal DĆType FlipĆFlop with 3ĆState Outputs The MC74AC574/74ACT574 is a high-speed, low power 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 MC74AC574/74ACT574 is functionally identical to the MC74AC374/ 74ACT374 except for the pinouts.
• Inputs and Outputs on Opposite Sides of Package Allowing Easy Interface with Microprocessors • Useful as Input or Output Port for Microprocessors • Functionally Identical to MC74AC374/74ACT374 • 3-State Outputs for Bus-Oriented Applications • Outputs Source/Sink 24 mA • ′ACT574 Has TTL Compatible Inputs VCC 20 O0 19 O1 18 O2 17 O3 16 O4 15 O5 14 O6 13 O7 12 CP 11 OCTAL D-TYPE FLIP-FLOP WITH 3-STATE OUTPUTS N SUFFIX CASE 738-03 PLASTIC DW SUFFIX CASE 751D-04 PLASTIC 1 OE 2 D0 3 D1 4 D2 5 D3 6 D4 7 D5 8 D6 9 D7 10 GND LOGIC SYMBOL PIN NAMES D0–D7 CP OE O0–O7 Data Inputs Clock Pulse Input 3-State Output Enable Input 3-State Outputs D0 D1 D2 D3 D4 D5 D6 D7 CP OE O0 O1 O2 O3 O4 O5 O6 O7 FACT DATA DataSheet 4 U .
com 5-1 www.
DataSheet4U.
com MC74AC57 MC74ACT574 FUNCTIONAL DESCRIPTION The MC74AC574/74ACT574 consists of eight edgetriggered flip-flops with individual D-type inputs and 3-state true outputs.
The buffered clock and buffered Output Enable are common to all flip-flops.
The eight flip-flops will store the state of their individual D inputs that meet the setup and hold time requirements on the LOW-to-HIGH Clock (CP) transition.
With the Output Enable (OE) LOW, the contents of the eight flip-flops are available at the outputs.
When OE is HIGH, the outputs go to the high impedance state.
Operation of the OE input does not affect the state of the flip-flops.
FUNCTION TABLE Inputs OE H H H H L L L L CP H H D L H L H L H L H Internal Q NC NC L H L H NC NC Outputs Function On Z Z Z Z L H NC NC Hold Hold Load Load Data Available Dat...


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