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74LCX74 Low Voltage Dual D-Type Positive Edge-Triggered Flip-Flop with 5V Tolerant Inputs
December 1997
74LCX74 Low Voltage Dual D-Type Positive Edge-Triggered Flip-Flop with 5V Tolerant Inputs
General Description
The LCX74 is a dual D-type flip-flop with Asynchronous Clear and Set inputs and complementary (Q, Q ) outputs. Information at the input is transferred to the outputs on the positive edge of the clock pulse. After the Clock Pulse input threshold voltage has been passed, the Data input is locked out and information present will not be transferred to the outputs until the next rising edge of the Clock Pulse input. Asynchronous Inputs: LOW input to SD (Set) sets Q to HIGH level LOW input to CD (Clear) sets Q to LOW level Clear and Set are independent of clock Simultaneous LOW on CD and SD makes both Q and Q HIGH
Features
n n n n n n n n n n 5V tolerant inputs 7.0 ns tPD max, 10 A ICCQ max Power down high impedance inputs and outputs Supports live insertion/withdrawal 2.0V-3.6V VCC supply operation 24 mA output drive Implements patented noise/EMI reduction circuitry Functionally compatible with 74 series 74 Latch-up performance exceeds 500 mA ESD performance: Human body model > 2000V Machine model > 200V
Ordering Code:
Order Number 74LCX74M 74LCX74SJ 74LCX74MTC Package Number M14A M14D MTC14 Package Description 16-Lead (0.150" Wide) Molded Small Outline Package, SOIC, JEDEC 14-Lead Small Outline Package, SOIC, EIAJ 14-Lead Thin Shrink Small Outline Package, TSSOP
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Connection Diagram
Pin Assignment for SOIC and TSSOP
DS012414-4
(c) 1998 Fairchild Semiconductor Corporation
DS012414
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Logic Symbol Pin Descriptions
Pin Names D1, D2 CP1, CP2 CD1, CD2 SD1, SD2 Q1, Q1, Q2, Q2
DS012414-1
Description Data Inputs Clock Pulse Inputs Direct Clear Inputs Direct Set Inputs Outputs
Truth Table
(Each Half) Inputs SD L H L H
DS012414-2
Outputs CP X X X
N N
CD H L L H H H
D X X X H L X
Q H L H H L Q0
Q L H H L H Q0
H H
L
IEEE/IEC
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial N = LOW-to-HIGH Clock Transition Q0(Q0) = Previous Q(Q) before LOW-to-HIGH Transition of Clock
DS012414-3
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Absolute Maximum Ratings (Note 1)
Symbol VCC VI VO IIK IOK IO ICC IGND TSTG Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source/Sink Current DC Supply Current per Supply Pin DC Ground Current per Ground Pin Storage Temperature Parameter Value -0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC + 0.5 -50 -50 +50 Output in High or Low State (Note 2) VI < GND VO < GND VO > VCC mA mA mA C Conditions Units V V V mA mA
50 100 100
-65 to +150
Recommended Operating Conditions
Symbol VCC VI VO IOH/IOL TA t/V Supply Voltage Input Voltage Output Voltage Output Current Free-Air Operating Temperature Input Edge Rate, VIN = 0.8V-2.0V, VCC = 3.0V Parameter
(Note 3)
Min Operating Data Retention HIGH or LOW State VCC = 3.0V - 3.6V VCC = 2.7V -40 0 2.0 1.5 0 0 Max 3.6 3.6 5.5 VCC V V mA C ns/V Units V
24 12
85 10
Note 1: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. Note 2: IO Absolute Maximum Rating must be observed. Note 3: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol VIH VIL VOH Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage IOH = -100 A IOH = -12 mA IOH = -18 mA IOH = -24 mA VOL LOW Level Output Voltage IOL = 100 A IOL = 12 mA IOL = 16 mA IOL = 24 mA II IOFF ICC ICC Input Leakage Current Power-Off Leakage Current Quiescent Supply Current Increase in ICC per Input 0 VI 5.5V VI or VO = 5.5V VI = VCC or GND 3.6V VI 5.5V VIH = VCC -0.6V Conditions VCC (V) 2.7-3.6 2.7-3.6 2.7-3.6 2.7 3.0 3.0 2.7-3.6 2.7 3.0 3.0 2.7-3.6 0 2.7-3.6 2.7-3.6 2.7-3.6 VCC - 0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 TA = -40C to +85C Min 2.0 0.8 Max V V V V V V V V V V A A A A A Units
5.0
10 10
10
500
3
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AC Electrical Characteristics
Symbol Parameter Min fMAX tPHL tPLH tPHL tPLH tS tH tW tW trem tOSHL tOSLH Maximum Clock Frequency Propagation Delay CPn to Qn or Qn Propagation Delay CDn or SDn to Qn or Qn Setup Time Hold Time Pulse Width CP Pulse Width and CD, SD Removal Time Output to Output Skew (Note 4) 150 1.5 1.5 1.5 1.5 2.5 1.5 3.3 3.3 2.5 1.0 1.0 7.0 7.0 7.0 7.0 TA = -40C to +85C, CL = 50pF, RL = 500 VCC = 3.3V 0.3V Max Min 150 1.5 1.5 1.5 1.5 2.5 1.5 3.3 3.6 3.0 8.0 8.0 8.0 8.0 ns ns ns ns ns ns ns VCC = 2.7V Max MHz ns Units
Note 4: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH).
Dynamic Switching Characteristics
Symbol VOLP VOLV Parameter Quiet Output Dynamic Peak VOL Quiet Output Dynamic Valley VOL Conditions CL = 50 pF, VIH = 3.3V, VIL = 0V CL = 50 pF, VIH = 3.3V, VIL = 0V VCC (V) 3.3 3.3 TA = 25C Typical 0.8 -0.8 V V Unit
Capacitance
Symbol CIN COUT CPD Parameter Input Capacitance Output Capacitance Power Dissipation Capacitance Conditions VCC = Open, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC, f = 10 MHz Typical 7 8 25 Units pF pF pF
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Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead (0.0150" Wide) Molded Small Outline Package JEDEC Package Number M14A
14-Lead Small Outline Package EIAJ (SJ) Package Number M14D
5
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74LCX74 Low Voltage Dual D-Type Positive Edge-Triggered Flip-Flop with 5V Tolerant Inputs
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
14-Lead Thin Shrink Small Outline Package, JEDEC Package Number MTC14
LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and (c) whose device or system, or to affect its safety or effectiveness. failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.
Fairchild Semiconductor Corporation Americas Customer Response Center Tel: 1-888-522-5372 Fairchild Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 8 141-35-0 English Tel: +44 (0) 1 793-85-68-56 Italy Tel: +39 (0) 2 57 5631 Fairchild Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: +852 2737-7200 Fax: +852 2314-0061 National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179
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Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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