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SN74LS74A

ON Semiconductor
Part Number SN74LS74A
Manufacturer ON Semiconductor
Description Dual D-Type Positive Edge-Triggered Flip-Flop
Published May 28, 2005
Detailed Description SN74LS74A Dual D−Type Positive Edge−Triggered Flip−Flop The SN74LS74A dual edge-triggered flip-flop utilizes Schottky TT...
Datasheet PDF File SN74LS74A PDF File

SN74LS74A
SN74LS74A

Overview
SN74LS74A Dual D−Type Positive Edge−Triggered Flip−Flop The SN74LS74A dual edge-triggered flip-flop utilizes Schottky TTL circuitry to produce high speed D-type flip-flops.
Each flip-flop has individual clear and set inputs, and also complementary Q and Q outputs.
Information at input D is transferred to the Q output on the positive-going edge of the clock pulse.
Clock triggering occurs at a voltage level of the clock pulse and is not directly related to the transition time of the positive-going pulse.
When the clock input is at either the HIGH or the LOW level, the D input signal has no effect.
http://onsemi.
com LOW POWER SCHOTTKY MODE SELECT − TRUTH TABLE OPERATING MODE INPUTS SD CD D OUTPUTS QQ Set Reset (Clear) *Undetermined Load “1” (Set) Load “0” (Reset) LHXHL HLXLH L L XHH HH h H L HH l LH * Both outputs will be HIGH while both SD and CD are LOW, but the output states are unpredictable if SD and CD go HIGH simultaneously.
If the levels at the set and clear are near VIL maximum then we cannot guarantee to meet the minimum level for VOH.
H, h = HIGH Voltage Level L, I = LOW Voltage Level X = Don’t Care l, h (q) = Lower case letters indicate the state of the referenced input i, h (q) = (or output) one set-up time prior to the HIGH to LOW clock transition.
GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage TA Operating Ambient Temperature Range 4.
75 5.
0 5.
25 V 0 25 70 °C IOH Output Current − High IOL Output Current − Low − 0.
4 8.
0 mA mA 14 1 PLASTIC N SUFFIX CASE 646 14 1 SOIC D SUFFIX CASE 751A 14 1 SOEIAJ M SUFFIX CASE 965 ORDERING INFORMATION Device Package Shipping SN74LS74AN 14 Pin DIP 2000 Units/Box SN74LS74AD SOIC−14 55 Units/Rail SN74LS74ADR2 SOIC−14 2500/Tape & Reel SN74LS74AM SOEIAJ−14 See Note 1 SN74LS74AMEL SOEIAJ−14 See Note 1 1.
For ordering information on the EIAJ version of the SOIC package, please contact your local ON Semiconductor representative.
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