MC54/74F398 QUAD 2-PORT REGISTER The MC54/74F398 is the logical equivalent of a quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flipflops on the rising edge of the clock. QUAD 2-PORT REGISTER • Select Inputs from Two Data Sources • Fully Positive Edge-Triggered Operation • Both True and Complement Outputs FAST SCHOTTKY TTL CONNECTION DIAGRAM (TOP VIEW) VCC 20 Qd 19 Qd 18 I0d 17 I1d 16 I1c 15 I0c 14 Qc 13 Qc 12 CP 11 J SUFFIX CERAMIC CASE 732-03 20 1 1 S 2 3 4 5 6 7 8 9 10 Qa Qa I0a I1a I1b I0b Qb Qb GND N SUFFIX PLASTIC CASE 738-03 20 1 DW SUFFIX SOIC CASE 751D-03 LOGIC DIAGRAM 20 I0a S I1a 1 D Qa CP Qa ORDERING INFORMATION MC54FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC I0b I1b D Qb CP Qb LOGIC SYMBOL I0c I1c D Qc CP Qc I0d I1d D Qd CP Qd 4 1 S 11 CP 5 7 6 14 15 17 16 I0a I1a I0b I1b I0c I1c I0d I1d Qa Qa Qb Qb Qc Qc Qd Qd 2 3 9 8 12 13 19 18 CP NOTES: This diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. FAST AND LS TTL DATA 4-189 VCC = PIN 20 GND = PIN 10 MC54/74F398 FUNCTIONAL DESCRIPTION type output register is fully edge-triggered. The Data inputs (I0x, I1x) and Select input (S) must be stable only a setup time prior to and hold time after the LOW-to-HIGH transition of the Clock input for predictable operation. The MC54/74F398 has both Q and Q outputs. The MC54/74F398 is a high-speed quad 2-port register. It will select four bits of data from either of two sources (Ports) under control of a common Select input (S). The selected data is transferred to a 4-bit output register synchronous with the LOW-to-HIGH transition of the Clock input (CP). The 4-bit DFUNCTION TABLE Inputs S I0 I I Outputs I1 X Q Q H h h X X L H I L H h X h H L I L H = HIGH Voltage Level L = LOW Voltage Level h = HIGH Voltage Level one setup time prior to the LOW-to-HIGH clock transition I = LOW Voltage Level; one setup time prior to the LOW-to-HIGH clock transition X = Don’t Care GUARANTEED OPERATING RANGES Symbol Parameter VCC Supply Voltage TA Operating Ambient Temperature Range Min Typ Max Unit 54, 74 4.5 5.0 5.5 V 54 –55 25 125 °C 74 0 25 70 IOH Output Current – High 54, 74 –1.0 mA IOL Output Current – Low 54, 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 Min Typ Max 2.0 54, 74 74 Unit Test Conditions V Guaranteed Input HIGH Voltage 0.8 V Guaranteed Input LOW Voltage –1.2 V IIN = –18 mA VCC = MIN 2.5 3.4 V IOH = – 1.0 mA VCC = 4.5 V 2.7 3.4 V IOH = – 1.0 mA VCC = 4.75 V 0.5 V IOL = 20 mA VCC = MIN µA VIN = 2.7 V VCC = MAX VOL Output LOW Voltage 0.35 IIH Input HIGH Current 20 100 µA VIN = 7.0 V IIL Input LOW Current –0.6 mA VIN = 0.5 V VCC = MAX IOS Output Short Circuit Current (Note 2) –150 mA VOUT = 0 V VCC = MAX ICC Power Supply Current 38 mA VCC = MAX VIN = GND CP = –60 25 NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating ranges. 2. Not more than one output should be shorted at a time, nor for more than 1 second. FAST AND LS TTL DATA 4-190 MC54/74F398 AC CHARACTERISTICS Symbol Parameter 54/74F 54F 74F TA = + 25°C TA = –55°C to +125°C TA = –0°C to 70°C VCC = +5.0 V VCC = 5.0 V ±10% VCC = 5.0 V ±10% CL = 50 pF CL = 50 pF CL = 50 pF Min Typ Max Min Max 80 Min Max fmax Maximum Clock Frequency 100 140 100 tPLH Propagation Delay 3.0 5.7 7.5 3.0 9.5 3.0 8.5 tPHL CP to Q or Q 3.0 6.8 9.5 3.0 11.5 3.0 10.0 Unit MHz ns AC OPERATING REQUIREMENTS Symbol Parameter Min 54/74F 54F 74F TA = +25°C TA = –55°C to +125°C TA = –0°C to 70°C VCC = +5.0V VCC = 5.0 V ±10% VCC = 5.0 V ±10% Typ Max Min Max Min ts(H) Setup Time, HIGH or LOW 3.0 4.5 3.0 ts(L) In to CP 3.0 4.5 3.0 th(H) Hold Time, HIGH or LOW 1.0 1.5 1.0 th(L) In to CP 1.0 1.5 1.0 ts(H) Setup Time, HIGH or LOW 7.5 10.5 8.5 ts(L) S to CP 7.5 10.5 8.5 th(H) Hold Time, HIGH or LOW 0 0 0 th(L) S to CP 0 0 0 tw(H) CP Pulse Width 4.0 4.0 4.0 tw(L) HIGH or LOW 5.0 7.0 5.0 FAST AND LS TTL DATA 4-191 Max Unit ns ns ns ns ns