Revised September 2000 74F112 Dual JK Negative Edge-Triggered Flip-Flop General Description The 74F112 contains two independent, high-speed JK flipflops with Direct Set and Clear inputs. Synchronous state changes are initiated by the falling edge of the clock. Triggering occurs at a voltage level of the clock and is not directly related to the transition time. The J and K inputs can change when the clock is in either state without affecting the flip-flop, provided that they are in the desired state during the recommended setup and hold times relative to the falling edge of the clock. A LOW signal on SD or CD prevents clocking and forces Q or Q HIGH, respectively. Simultaneous LOW signals on SD and CD force both Q and Q HIGH. Asynchronous Inputs: LOW input to SD sets Q to HIGH level LOW input to CD sets Q to LOW level Clear and Set are independent of clock Simultaneous LOW on CD and SD makes both Q and Q HIGH Ordering Code: Order Number Package Number Package Description 74F112SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 74F112SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F112PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC © 2000 Fairchild Semiconductor Corporation DS009472 www.fairchildsemi.com 74F112 Dual JK Negative Edge-Triggered Flip-Flop April 1988 74F112 Unit Loading/Fan Out Input IIH/IIL U.L. Pin Names Description HIGH/LOW Output IOH/IOL J1, J2, K1, K2 Data Inputs 1.0/1.0 20 µA/−0.6 mA CP1, CP2 Clock Pulse Inputs (Active Falling Edge) 1.0/4.0 20 µA/−2.4 mA CD1, CD2 Direct Clear Inputs (Active LOW) 1.0/5.0 20 µA/−3.0 mA SD1, SD2 Direct Set Inputs (Active LOW) 1.0/5.0 20 µA/−3.0 mA 50/33.3 −1 mA/20 mA Q1, Q2, Q1, Q2 Outputs Truth Table Inputs Outputs SD CD CP J K Q L H X X X H L H L X X X L H X X X H H h h Q0 Q0 L L H H H H H H H H Q l h L H h l H L l l Q0 Q0 H (h) = HIGH Voltage Level L (l) = LOW Voltage Level X = Immaterial = HIGH-to-LOW Clock Transition Q0(Q0) = Before HIGH-to-LOW Transition of Clock Lower case letters indicate the state of the referenced input or output one setup time prior to the HIGH-to-LOW clock transition. Logic Diagram (One Half Shown) Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.fairchildsemi.com 2 Recommended Operating Conditions Storage Temperature −65°C to +150°C Ambient Temperature under Bias −55°C to +125°C Free Air Ambient Temperature Junction Temperature under Bias −55°C to +150°C Supply Voltage 0°C to +70°C +4.5V to +5.5V −0.5V to +7.0V VCC Pin Potential to Ground Pin Input Voltage (Note 2) −0.5V to +7.0V Input Current (Note 2) −30 mA to +5.0 mA Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output −0.5V to VCC 3-STATE Output −0.5V to +5.5V Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Note 2: Either voltage limit or current limit is sufficient to protect inputs. Current Applied to Output in LOW State (Max) twice the rated IOL (mA) DC Electrical Characteristics Symbol Parameter Min Typ Max VCC VIL Input LOW Voltage 0.8 V VCD Input Clamp Diode Voltage −1.2 V Min IIN = −18 mA V Min IOH = −1 mA Output HIGH Voltage VOL Output LOW 10% VCC 2.5 5% VCC 2.7 V Conditions Input HIGH Voltage VOH 2.0 Units VIH Input HIGH Current IBVI Input HIGH Current Breakdown Test ICEX Output HIGH Leakage Current VID Input Leakage Test IOD 0.5 V Min IOL = 20 mA 5.0 µA Max VIN = 2.7V 7.0 µA Max VIN = 7.0V 50 µA Max VOUT = VCC V 0.0 µA 0.0 mA Max VIN = 0.5V (CPn) −150 mA Max VOUT = 0V 4.75 Output Leakage 3.75 Circuit Current IIL Recognized as a LOW Signal IOH = −1 mA 10% VCC Voltage IIH Recognized as a HIGH Signal −0.6 Input LOW Current −2.4 VIOD = 150 mV All other pins grounded VIN = 0.5V (Jn, Kn) −3.0 −60 IID = 1.9 µA All other pins grounded VIN = 0.5V (CDn, SDn) IOS Output Short-Circuit Current ICCH Power Supply Current 12 19 mA Max VO = HIGH ICCL Power Supply Current 12 19 mA Max VO = LOW 3 www.fairchildsemi.com 74F112 Absolute Maximum Ratings(Note 1) 74F112 AC Electrical Characteristics Symbol Parameter TA = +25°C TA = 0°C to +70°C VCC = +5.0V VCC = +5.0V CL = 50 pF CL = 50 pF Min Typ fMAX Maximum Clock Frequency 85 105 Max Min tPLH Propagation Delay 2.0 5.0 Max tPHL CPn to Qn or Qn 2.0 5.0 6.5 2.0 7.5 tPLH Propagation Delay 2.0 4.5 6.5 2.0 7.5 tPHL CDn, SDn to Qn, Qn 2.0 4.5 6.5 2.0 7.5 80 6.5 2.0 Units MHz 7.5 ns ns AC Operating Requirements TA = +25°C Symbol VCC = +5.0V Parameter Min Max TA = 0°C to +70°C VCC = +5.0V Min Units Max tS(H) Setup Time, HIGH or LOW 4.0 5.0 tS(L) Jn or Kn to CPn 3.0 3.5 tH(H) Hold Time, HIGH or LOW 0 0 tH(L) Jn or Kn to CPn 0 0 tW(H) CP Pulse Width 4.5 5.0 tW(L) HIGH or LOW 4.5 5.0 tW(L) Pulse Width, LOW 4.5 5.0 ns 4.0 5.0 ns CDn or SDn tREC Recovery Time SDn, CDn to CP www.fairchildsemi.com 4 ns ns 74F112 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A 5 www.fairchildsemi.com 74F112 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D www.fairchildsemi.com 6 74F112 Dual JK Negative Edge-Triggered Flip-Flop Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E 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. 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 device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose 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. www.fairchildsemi.com 7 www.fairchildsemi.com