Revised April 2000 DM74S174 • DM74S175 Hex/Quad D Flip-Flop with Clear General Description Features These positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic. All have a direct clear input, and the quad (DM74S175) versions feature complementary outputs from each flip-flop. ■ DM74S174 contain six flip-flops with single-rail outputs. Information at the D inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse. When the clock input is at either the HIGH or LOW level, the D input signal has no effect at the output. ■ Individual data input to each flip-flop ■ DM74S175 contain four flip-flops with double-rail outputs. ■ Buffered clock and direct clear inputs ■ Applications include: Buffer/storage registers Shift registers Pattern generators ■ Typical clock frequency 110 MHz ■ Typical power dissipation per flip-flop 75mW Ordering Code: Order Number Package Number Package Description DM74S174N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide DM74S175N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Connection Diagrams DM74S174 © 2000 Fairchild Semiconductor Corporation DM74S175 DS006472 www.fairchildsemi.com DM74S174 • DM74S175 Hex/Quad D Flip-Flop with Clear August 1986 DM74S174 • DM74S175 Function Table (Each Flip-Flop) Inputs Outputs Clear Clock D Q Q (Note 1) L X X L H H ↑ H H L H ↑ L L H H L X Q0 Q0 H = HIGH Level (steady state) L = LOW Level (steady state) X = Don’t Care ↑ = Transition from LOW-to-HIGH level Q0 = The level of Q before the indicated steady-state input conditions were established. Note 1: DM74S175 only. Logic Diagrams DM74S174 www.fairchildsemi.com DM74S175 2 Supply Voltage Note 2: 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. 7V Input Voltage 5.5V 0°C to +70°C Operating Free Air Temperature Range −65°C to +150°C Storage Temperature Range Recommended Operating Conditions Symbol Parameter Min Nom Max 4.75 5 5.25 Units VCC Supply Voltage VIH HIGH Level Input Voltage VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −1 mA IOL LOW Level Output Current fCLK Clock Frequency (Note 3) fCLK Clock Frequency (Note 4) tW Pulse Width tSU tH tREL TA 2 V V 20 mA 0 110 75 MHz 0 90 65 MHz Clock 7 (Note 3) Clear 10 Pulse Width Clock 9 (Note 4) Clear 12 Data Setup Time (Note 3) 5 Data Setup Time (Note 4) 7 Data Hold Time (Note 3) 3 Data Hold Time (Note 4) 5 Clear Release Time (Note 3) 5 Clear Release Time (Note 4) 7 Free Air Operating Temperature 0 ns ns ns ns 70 °C Note 3: CL = 15 pF, RL = 280Ω, TA = 25°C and VCC = 5V. Note 4: CL = 50 pF, RL = 280Ω, TA = 25°C and VCC = 5V. 3 www.fairchildsemi.com DM74S174 • DM74S175 Absolute Maximum Ratings(Note 2) DM74S174 • DM74S175 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol Parameter Conditions VI Input Clamp Voltage VCC = Min, II = −18 mA VOH HIGH Level VCC = Min, IOH = Max Output Voltage VIL = Max, VIH = Min VOL LOW Level VCC = Min, IOL = Max Output Voltage VIH = Min, VIL = Max Min 2.7 Typ (Note 5) Max Units −1.2 V 3.4 V 0.5 V mA II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 IIH HIGH Level Input Current VCC = Max, VI = 2.7V 50 µA IIL LOW Level Input Current VCC = Max, VI = 0.5V −2 mA IOS Short Circuit Output Current VCC = Max (Note 6) −100 mA ICC Supply Current (DM74S174) VCC = Max (Note 7) 90 144 mA ICC Supply Current (DM74S175) VCC = Max (Note 7) 60 96 mA −40 Note 5: All typicals are at VCC = 5V, TA = 25°C. Note 6: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 7: With all outputs OPEN and 4.5V applied to all DATA and CLEAR inputs, ICC is measured after a momentary ground, then 4.5V applied to the CLOCK input. Switching Characteristics at VCC = 5V and TA = 25°C RL = 280Ω Symbol Parameter From (Input) To (Output) fMAX Maximum Clock Frequency tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output tPLH Propagation Delay Time LOW-to-HIGH Level Output (DM74S175 Only) tPHL Propagation Delay Time HIGH-to-LOW Level Output www.fairchildsemi.com CL = 15 pF Min Max 75 CL = 50 pF Min Units Max 65 MHz Clock to Output 12 15 ns Clock to Output 17 21 ns Clear to Q 15 18 ns Clear to Q 22 23 ns 4 DM74S174 • DM74S175 Hex/Quad D Flip-Flop with Clear Physical Dimensions inches (millimeters) unless otherwise noted 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 5 www.fairchildsemi.com