Revised November 1999 74ABT273 Octal D-Type Flip-Flop General Description Features The ABT273 has eight edge-triggered D-type flip-flops with individual D inputs and Q outputs. The common buffered Clock (CP) and Master Reset (MR) inputs load and reset (clear) all flip-flops simultaneously. ■ Eight edge-triggered D-type flip-flops The register is fully edge-triggered. The state of each D input, one setup time before the LOW-to-HIGH clock transition, is transferred to the corresponding flip-flop’s Q output. All outputs will be forced LOW independently of Clock or Data inputs by a LOW voltage level on the MR input. The device is useful for applications where the true output only is required and the Clock and Master Reset are common to all storage elements. ■ Buffered common clock ■ Buffered, asynchronous Master Reset ■ See ABT377 for clock enable version ■ See ABT373 for transparent latch version ■ See ABT374 for 3-STATE version ■ Output sink capability of 64 mA, source capability of 32 mA ■ Guaranteed latchup protection ■ High impedance glitch free bus loading during entire power up and power down cycle ■ Non-destructive hot insertion capability ■ Disable time less than enable time to avoid bus contention Ordering Code: Order Number 74ABT273CSC 74ABT273CSJ Package Number M20B M20D Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74ABT273CMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 74ABT273CMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Connection Diagram Pin Descriptions Pin Names D0–D7 © 1999 Fairchild Semiconductor Corporation DS011549 Description Data Inputs MR Master Reset (Active LOW) CP Clock Pulse Input (Active Rising Edge) Q0–Q7 Data Outputs www.fairchildsemi.com 74ABT273 Octal D-Type Flip-Flop January 1993 74ABT273 Truth Table Operating Mode Inputs Output MR CP Dn Reset (Clear) L X L H h H Load “0” H X Load “1” l L H = HIGH Voltage Level steady state h = HIGH Voltage Level one setup time prior to the LOW-to-HIGH clock transition L = LOW Voltage Level steady state I = LOW Voltage Level one setup time prior to the LOW-to-HIGH clock transition X = Immaterial = LOW-to-HIGH clock transition Qn Logic Diagram 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 −65°C to +150°C Storage Temperature Ambient Temperature under Bias −55°C to +125°C Free Air Ambient Temperature Junction Temperature under Bias −55°C to +150°C Supply Voltage −0.5V 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 −40°C to +85°C +4.5V to +5.5V Minimum Input Edge Rate (∆V/∆t) Data Input 50 mV/ns Enable Input 20 mV/ns Voltage Applied to Any Output in the Disabled or −0.5V to +4.75V Power-Off State −0.5V to VCC in the HIGH State Current Applied to Output in LOW State (Max) twice the rated IOL (mA) 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. −500 mA DC Latchup Source Current (Across Comm Operating Range) Note 2: Either voltage limit or current limit is sufficient to protect inputs. VCC + 4.5V Over Voltage Latchup DC Electrical Characteristics Symbol Parameter Min Typ Max 2.0 Units VCC VIH Input HIGH Voltage V VIL Input LOW Voltage 0.8 V VCD Input Clamp Diode Voltage −1.2 V Min VOH Output HIGH Voltage V Min VOL Output LOW Voltage 0.55 V Min IIH Input HIGH Current 1 2.5 2.0 Input HIGH Current IIL IOH = −32 mA IOL = 64 mA VIN = 2.7V (Note 3) µA Max µA Max V 0.0 IID = 1.9 µA −275 mA Max VOUT = 0.0V −1 Input LOW Current IIN = −18 mA IOH = −3 mA Max 7 Breakdown Test Recognized LOW Signal µA 1 IBVI Conditions Recognized HIGH Signal −1 VIN = VCC VIN = 7.0V VIN = 0.5V (Note 3) VIN = 0.0V VID Input Leakage Test 4.75 IOS Output Short-Circuit Current −100 ICEX Output HIGH Leakage Current 50 µA Max VOUT = VCC ICCH Power Supply Current 50 µA Max All Outputs HIGH ICCL Power Supply Current 30 mA Max All Outputs LOW ICCT Maximum ICC/Input 1.5 mA Max VI = VCC − 2.1V All Other Pins Grounded Outputs Enabled Data Input VI = VCC − 2.1V All Others at VCC or GND ICCD Dynamic ICC No Load 0.3 mA/ MHz Max Outputs Open (Note 4) One Bit Toggling, 50% Duty Cycle Note 3: Guaranteed but not tested. Note 4: For 8 bits toggling, ICCD < 0.5 mA/MHz. 3 www.fairchildsemi.com 74ABT273 Absolute Maximum Ratings(Note 1) 74ABT273 AC Electrical Characteristics (SSOIC package) Symbol Parameter TA = +25°C TA = −55°C to +125°C TA = −40°C to +85°C VCC = +5.0V VCC = 4.5V to 5.5V VCC = 4.5V to 5.5V CL = 50 pF CL = 50 pF CL = 50 pF Min Typ fMAX Maximum Clock Frequency 150 200 tPLH Propagation Delay 2.0 6.0 1.0 7.0 2.0 6.0 tPHL CP to On 2.8 6.8 1.0 7.5 2.8 6.8 tPHL Propagation Delay 2.5 7.4 1.0 8.2 2.5 7.4 MR to On Max Min Max Min 150 Units Max 150 MHz ns ns AC Operating Requirements Symbol Parameter TA = +25°C TA = −55°C to +125°C TA = −40°C to +85°C VCC = +5.0V VCC = 4.5V to 5.5V VCC = 4.5V to 5.5V CL = 50 pF CL = 50 pF CL = 50 pF Min Max Min Max Min Units Max tS(H) Setup Time, HIGH 2.0 2.0 2.0 tS(L) or LOW Dn to CP 2.5 2.5 2.5 tH(H) Hold Time, HIGH 1.2 1.4 1.2 tH(L) or LOW Dn to CP 1.2 1.4 1.2 tW(H) Pulse Width, CP, 3.3 3.3 3.3 tW(L) HIGH or LOW 3.3 3.3 3.3 tW(L) Master Reset Pulse 3.3 3.3 3.3 ns 2.0 2.0 2.0 ns Width, LOW Recovery Time tREC MR to CP ns ns ns Capacitance (SOIC package) Symbol Parameter Typ Units Conditions TA = 25°C CIN Input Capacitance 5 pF VCC = 0V COUT (Note 5) Output Capacitance 9 pF VCC = 5.0V Note 5: COUT is measured at frequency f = 1 MHz, per MIL-STD-833, Method 3012. www.fairchildsemi.com 4 74ABT273 AC Loading FIGURE 2. VM = 1.5V Input Pulse Requirements *Includes jig and probe capacitance FIGURE 1. Standard AC Test Load Amplitude Rep. Rate tW tr tf 3.0V 1 MHz 500 ns 2.5 ns 2.5 ns FIGURE 3. Test Input Signal Requirements AC Waveforms FIGURE 6. Propagation Delay Waveforms for Inverting and Non-Inverting Functions FIGURE 4. Propagation Delay, Pulse Width Waveforms FIGURE 5. 3-STATE Output HIGH and LOW Enable and Disable Times FIGURE 7. Setup Time, Hold Time and Recovery Time Waveforms 5 www.fairchildsemi.com 74ABT273 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body Package Number M20B www.fairchildsemi.com 6 74ABT273 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D 7 www.fairchildsemi.com 74ABT273 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide Package Number MSA20 www.fairchildsemi.com 8 74ABT273 Octal D-Type Flip-Flop Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 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 9 www.fairchildsemi.com