MC54/74F399 QUAD 2-PORT REGISTER The MC54/74F399 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. The MC54/74F399 is the 16-pin version of the MC54/74F398, with only the Q outputs of the flip-flops available. QUAD 2-PORT REGISTER • Select Inputs from Two Data Sources • Fully Positive Edge-Triggered Operation FAST SCHOTTKY TTL CONNECTION DIAGRAM (TOP VIEW) VCC 16 Qd 15 I0d 14 I1d 13 I1c 12 I0c 11 Qc 10 CP 9 J SUFFIX CERAMIC CASE 620-09 16 1 1 2 3 4 5 6 7 S Qa I0a I1a I1b I0b Qb N SUFFIX PLASTIC CASE 648-08 8 16 GND 1 LOGIC DIAGRAM I0a S I1a 1 D Qa ORDERING INFORMATION CP MC54FXXXJ MC74FXXXN MC74FXXXD I0b D I1b D SUFFIX SOIC CASE 751B-03 16 Ceramic Plastic SOIC Qb CP LOGIC SYMBOL I0c D I1c Qc 3 CP I0d D I1d Qd 1 S 9 CP 4 6 5 11 12 14 13 I0a I1a I0b I1b I0c I1c I0d I1d Qa Qb Qc Qd 2 7 10 15 CP CP NOTE: 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 4-192 VCC = PIN 16 GND = PIN 8 MC54/74F399 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 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 Output I1 X Q L H h h X X I L h X h H I 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 Output LOW Voltage IIH Input HIGH Current Max 2.0 54, 74 74 VOL Typ IIL Input LOW Current IOS Output Short Circuit Current (Note 2) ICC Power Supply Current 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 20 µA VIN = 2.7 V VCC = MAX 100 µA VIN = 7.0 V –0.6 mA VIN = 0.5 V VCC = MAX –150 mA VOUT = 0 V VCC = MAX 34 mA VCC = MAX VIN = GND CP = 0.35 –60 22 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 4-193 MC54/74F399 AC CHARACTERISTICS Symbol Parameter 54/74F 54F 74F TA = + 25°C TA = –55°C to +125°C TA = 0°C to 70°C VCC = +5.0V 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 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 9.5 8.5 ts(L) S to CP 7.5 9.5 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 4-194 Max Unit ns ns ns ns ns