Dual D-Type Positive Edge-Triggered Flip-Flop

www.DataSheet4U.com 54AC74 • 54ACT74 Dual D-Type Positive Edge-Triggered Flip-Flop August 1998 54AC74 • 54ACT74 Dual D-Type Positive Edge-Triggered Flip-Flop General Description The ’AC/’ACT74 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. 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. 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 ICC reduced by 50% Output source/sink 24 mA ’ACT74 has TTL-compatible inputs Standard Microcircuit Drawing (SMD) — ’AC74: 5962-88520 — ’ACT74: 5962-87525 Logic Symbols DS100266-2 DS100266-1 Pin Names IEEE/IEC D1, D2 CP1, CP2 CD1, CD2 SD1, SD2 Q1, Q1, Q2, Q2 Description Data Inputs Clock Pulse Inputs Direct Clear Inputs Direct Set Inputs Outputs DS100266-3 FACT ® is a registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100266 www.national.com Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100266-4 DS100266-5 Truth Table (Each Half) Inputs SD L H L H H H CD H L L H H H CP X X X N N Outputs D X X X H L X Q H L H H L Q0 Q L H H L H Q0 L 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 Logic Diagram DS100266-6 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.national.com 2 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) Junction Temperature (TJ) CDIP −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V Recommended Operating Conditions Supply Voltage (VCC) ’AC ’ACT Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC/ACT Minimum Input Edge Rate (∆V/∆t) ’AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V Minimum Input Edge Rate (∆V/∆t) ’ACT Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns ±50 mA ±50 mA −65˚C to +150˚C 175˚C 125 mV/ns Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation of FACT ® circuits outside databook specifications. DC Characteristics for ’AC Family Devices Symbol Parameter VCC (V) 54AC TA = −55˚C to +125˚C Guaranteed Limits VIH Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 (Note 2) VIN = VIL or VIH 3.0 4.5 5.5 VOL Maximum Low Level Output Voltage 3.0 4.5 5.5 2.4 3.7 4.7 0.1 0.1 0.1 (Note 2) VIN = VIL or VIH 3.0 4.5 5.5 IIN Maximum Input Leakage Current 5.5 0.5 0.5 0.5 V µA IOL 12 mA 24 mA 24 mA VI = VCC, GND V V IOH −12 mA −24 mA −24 mA IOUT = 50 µA V IOUT = −50 µA V VOUT = 0.1V or VCC − 0.1V V VOUT = 0.1V or VCC − 0.1V Units Conditions ±1.0 3 www.national.com DC Characteristics for ’AC Family Devices Symbol Parameter VCC (V) (Continued) 54AC TA = −55˚C to +125˚C Guaranteed Limits Units Conditions IOLD IOHD ICC (Note 3) Minimum Dynamic Output Current Maximum Quiescent Supply Current 5.5 5.5 5.5 50 −50 40.0 mA mA µA VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. ICC for 54AC @ 25˚C is identical to 74AC @ 25˚C. DC Characteristics for ’ACT Family Devices Symbol Parameter VCC (V) 54ACT TA = −55˚C to +125˚C Guaranteed Limits VIH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 2.0 2.0 0.8 0.8 4.4 5.4 (Note 5) VIN = VIL or VIH 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 3.70 4.70 0.1 0.1 (Note 5) VIN = VIL or VIH 4.5 5.5 IIN ICCT IOLD IOHD ICC Maximum Input Leakage Current Maximum ICC/Input (Note 6) Minimum Dynamic Output Current Maximum Quiescent Supply Current Note 5: All outputs loaded; thresholds on input associated with output under test. Note 6: Maximum test duration 2.0 ms, one output loaded at a time. Note 7: ICC for 54ACT @ 25˚C is identical to 74ACT @ 25˚C. Units Conditions V VOUT = 0.1V or VCC − 0.1V VIL V VOUT = 0.1V or VCC − 0.1V VOH V IOUT = −50 µA V V IOH −24 mA −24 mA IOUT = 50 µA 0.50 0.50 V µA mA mA mA µA IOL 24 mA 5.5 5.5 5.5 5.5 5.5 ±1.0 1.6 50 −50 40.0 24 mA VI = VCC, GND VI = VCC − 2.1V VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND www.national.com 4 AC Electrical Characteristics VCC Symbol Parameter (V) (Note 8) fmax tPLH tPHL tPLH tPHL Maximum Clock Frequency Propagation Delay CDn or SDn to Qn or Qn Propagation Delay CDn or SDn to Qn or Qn Propagation Delay CPn to Qn or Qn Propagation Delay CPn to Qn or Qn Note 8: Voltage Range 3.3 is 3.3V ± 0.3V Voltage Range 5.0 is 5.0V ± 0.5V 54AC TA = −55˚C to +125˚C CL = 50 pF Min Max 70 95 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 13.0 9.5 14.0 10.5 17.5 12.0 13.5 10.0 Units Fig. No. 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 MHz ns ns ns ns AC Operating Requirements Symbol Parameter VCC (V) (Note 9) ts th tw trec Set-up Time, HIGH or LOW Dn to CPn Hold Time, HIGH or LOW Dn to CPn CPn or CDn or SDn Pulse Width Recovery Time CDn or SDn to CP Note 9: Voltage Range 3.3 is 3.3V ±0.3V Voltage Range 5.0 is 5.0V ±0.5V 54AC TA = −55˚C to +125˚C CL = 50 pF Guaranteed Limits 5.0 4.0 0.5 0.5 8.0 5.5 0.5 0.5 Units Fig. No. 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 ns ns ns ns AC Electrical Characteristics VCC Symbol Parameter (V) (Note 10) Min fmax tPLH tPHL tPLH tPHL Maximum Clock Frequency Propagation Delay CDn or SDn to Qn or Qn Propagation Delay CDn or SDn to Qn or Qn Propagation Delay CPn to Qn or Qn Propagation Delay CPn to Qn or Qn 5.0 1.0 12.0 ns 5.0 1.0 14.0 ns 5.0 1.0 12.5 ns 5.0 1.0 11.5 ns 5.0 85 54ACT TA = −55˚C to +125˚C CL = 50 pF Max MHz Units 5 www.national.com AC Electrical Characteristics Note 10: Voltage Range 5.0 is 5.0V ±0.5V (Continued) AC Operating Requirements Symbol Parameter VCC (V) (Note 11) ts Set-up Time, HIGH or LOW Dn to CPn th Hold Time, HIGH or LOW Dn to CPn tw trec CPn or CDn or SDn Pulse Width Recovery Time CDn or SDn to CP Note 11: Voltage Range 5.0 is 5.0V ±0.5V 54ACT TA = −55˚C CL = 50 pF Guaranteed Limits 4.0 Units Fig. No. 5.0 ns 5.0 1.0 ns 5.0 5.0 7.0 0.5 ns ns Capacitance Symbol CIN CPD Parameter Input Capacitance Power Dissipation Capacitance Typ 4.5 35.0 Units pF pF Conditions VCC = OPEN VCC = 5.0V www.national.com 6 Physical Dimensions inches (millimeters) unless otherwise noted 20-Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A 14-Lead Ceramic Dual-In-Line Package (D) NS Package Number J14A 7 www.national.com 54AC74 • 54ACT74 Dual D-Type Positive Edge-Triggered Flip-Flop Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Ceramic Flatpak (F) NS Package Number W14B LIFE SUPPORT POLICY NATIONAL’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 NATIONAL 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 whose faildevice or system, or to affect its safety or effectiveness. ure 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. 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