MC74F377 OCTAL D FLIP-FLOP WITH ENABLE The MC74F377 is a high-speed 8-Bit Register. The register consists of eight D-Type Flip-Flops with individual D inputs and Q outputs. The common buffered clock (CP) input loads all flip-flops simultaneously when the Enable (E) is LOW. This device is supplied in a 20-pin package. OCTAL D FLIP-FLOP WITH ENABLE • High Impedance NPN Base Inputs for Reduced Loading (20 µA in • • • • • HIGH and LOW States) Ideal for Addressable Register Applications Enable for Address and Data Synchronization Applications Eight Edge-Triggered D Flip-Flops Buffered Common Clock See: MC74F373 for Transparent Latch Version MC74F374 for 3-State Version FAST SCHOTTKY TTL J SUFFIX CERAMIC CASE 732-03 20 1 CONNECTION DIAGRAM (TOP VIEW) VCC 20 Q7 19 D7 18 D6 17 Q6 16 Q5 15 D5 14 D4 13 Q4 12 CP N SUFFIX PLASTIC CASE 738-03 11 20 1 DW SUFFIX SOIC CASE 751D-03 20 1 2 3 4 5 6 7 8 9 10 E Q0 D0 D1 Q1 Q2 D2 D3 Q3 GND 1 ORDERING INFORMATION MC74FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC FUNCTION TABLE Inputs Operating Mode Outputs CP E Dn Qn Load “1” ↑ l h H Load “0” ↑ l l L Hold (do nothing) ↑ h X No Change X H X No Change 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; l = LOW voltage level one setup time prior to the LOW-to-HIGH clock transition; X = Don’t Care; ↑ = LOW-to-HIGH clock transition FAST AND LS TTL DATA 4-278 MC74F377 FUNCTIONAL DESCRIPTION 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. The E input must be stable one setup time prior to the LOWto-HIGH clock transition for predictable operation. The MC74F377 has eight edge-triggered D-type flip-flops with individual D inputs and Q outputs. The common buffered Clock (CP) input loads all flip-flops simultaneously, when the Enable (E) is LOW. GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 74 4.5 5.0 5.5 V TA Operating Ambient Temperature Range 74 0 25 70 °C IOH Output Current — HIGH 74 –1.0 mA IOL Output Current — LOW 74 20 mA DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage VOL Output LOW Voltage IIH Min Typ Max Unit 2.0 2.5 2.5 2.7 2.7 Test Conditions V Guaranteed Input HIGH Voltage 0.8 V Guaranteed Input LOW Voltage –1.2 V IIN = –18 mA VCC = MIN V IOH = –1.0 mA VCC = 4.5 V VCC = 4.75 V 0.35 0.5 V IOL = 20 mA VCC = MIN Input HIGH Current 20 µA VIN = 2.7 V VCC = MAX IIL Input LOW Current –20 µA VIN = 0.5 V VCC = MAX IOS Output Short Circuit Current (Note 2) –150 mA VOUT = 0 V VCC = MAX ICC Total Supply Current VCC = MAX –60 ICCH 55 72 mA Dn = 4.5 V, CP = ↑, E = GND ICCL 70 90 mA Dn = E = GND, CP = ↑ NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type. 2. Not more than one output should be shorted at a time, nor for more than 1 second. AC ELECTRICAL CHARACTERISTICS Symbol Parameter 74F 74F TA = +25°C TA = 0 to +70°C VCC = +5.0 V VCC = 5.0 V ± 10% CL = 50 pF CL = 50 pF Min Typ Max Min Max fMAX Maximum Clock Frequency 110 120 tPLH Propagation Delay 4.0 6.5 8.5 4.0 10 tPHL CP to Qn 4.0 7.0 9.0 4.0 10.5 FAST AND LS TTL DATA 4-279 100 Unit MHz ns MC74F377 LOGIC DIAGRAM D0 (3) E D1 (4) D2 (7) D3 (8) D4 (13) D5 (14) D6 (17) D7 (18) (1) Q D CP Q CP D Q CP D Q D CP v D v Q CP v v D v Q CP v D Q CP v v D Q CP (11) CP (2) Q0 (5) Q1 (6) Q2 (9) Q3 (12) Q4 (15) Q5 (16) Q6 (19) Q7 VCC = PIN 20 GND = PIN 10 AC OPERATING REQUIREMENTS Symbol Parameter Min 74F 74F TA = +25°C TA = 0°C to +70°C VCC = 5.0 V VCC = 5.0 V ± 10% CL = 50 pF CL = 50 pF Typ Max Min ts(H) Setup Time, HIGH or LOW 3.0 3.0 ts(L) Dn to CP 3.0 3.0 th(H) Hold Time, HIGH or LOW 1.0 1.0 th(L) Dn to CP 1.0 1.0 ts(H) Setup Time, HIGH or LOW 2.5 2.5 ts(L) E to CP 4.0 4.0 th(H) Hold Time, HIGH or LOW 0 0 th(L) E to CP 0 0 tw(H) Clock Pulse Width 4.0 5.0 tw(L) HIGH or LOW 4.0 5.0 FAST AND LS TTL DATA 4-280 Typ Max Unit ns ns ns ns ns