MC54/74F352 DUAL 4-INPUT MULTIPLEXER The MC54/74F352 is a very high speed dual 4-input multiplexer with common Select inputs and individual Enable inputs for each section. It can select two bits of data from four sources. The two buffered outputs present data in the inverted (complementary) form. The F352 is the functional equivalent of the F153 except with inverted outputs. • Inverted Version of the F153 • Separate Enables for Each Multiplexer • Input Clamp Diode Limits High-Speed Termination Effects DUAL 4-INPUT MULTIPLEXER FAST SCHOTTKY TTL CONNECTION DIAGRAM (TOP VIEW) VCC Eb S0 I3b I2b I1b I0b Zb 16 15 14 13 12 11 10 9 J SUFFIX CERAMIC CASE 620-09 16 1 1 2 3 4 5 6 7 8 Ea S1 I3a I2a I1a I0a Za GND N SUFFIX PLASTIC CASE 648-08 16 1 LOGIC DIAGRAM Ea I0a I1a I2a I3a S1 S0 I0b D SUFFIX SOIC CASE 751B-03 16 I1b I2b 1 I3b Eb ORDERING INFORMATION MC54FXXXJ MC74FXXXN MC74FXXXD Ceramic Plastic SOIC LOGIC SYMBOL 2 S1 7 Za Za Zb 9 VCC = PIN 14 GND = PIN 7 FAST AND LS TTL DATA 4-157 Zb 14 S0 Ea I0a I1a I2a I3a I0b I1b I2b I3b Eb 1 6 5 4 3 10 11 12 13 15 MC54/74F352 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 74 0 25 70 °C IOH Output Current — High 54, 74 –1.0 mA IOL Output Current — Low 54, 74 20 mA FUNCTIONAL DESCRIPTION The F352 is a dual 4-input multiplexer. It selects two bits of data from up to four sources under the control of the common Select inputs (S0, S1).The two 4-input multiplexer circuits have individual active-LOW Enables(Ea, Eb) which can be used to strobe the outputs independently. When the Enables (Ea, Eb) are HIGH, the corresponding outputs (Za, Zb) are forced HIGH. The logic equations for the outputs are shown below: The F352 can be used to move data from a group of registers to a common output bus. The particular register from which the data came would be determined by the state of the Select inputs. A less obvious application is as a function generator. The F352 can generate two functions of three variables. This is useful for implementing highly irregular random logic. Za = Ea • (I0a • S1 • S0 + I1a • S1 • S0 + I2a • S1 • S0 + I3a • S1 • S0) Zb = Eb • (I0b • S1 • S0 + I1b • S1 • S0 + I2b • S1 • S0 + I3b • S1 • S0) FUNCTION TABLE Select Inputs Inputs (a or b) S0 S1 E I0 I1 X X H X L L L L L L L H L H Output I2 I3 Z X X X H X X X H H X X X L L X L X X H L L X H X X L L H L X X L X H L H L X X H X L H H L X X X L H H H L X X X H L H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care FAST AND LS TTL DATA 4-158 MC54/74F352 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 Input HIGH Current Min Typ Max Unit 2.0 54, 74 2.5 74 2.7 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 = 4.50 V 3.4 3.4 0.35 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 IIL Input LOW Current IOS Output Short Circuit Current (Note 2) ICCH Power Supply Current –60 ICCL Test Conditions VIN = 7.0 V –0.6 mA VIN = 0.5 V VCC = MAX –150 mA VOUT = 0 V VCC = MAX 9.3 14 mA VIN = GND VCC = MAX 13.3 20 VIN = HIGH 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. 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 Min Max Unit ns tPLH Propagation Delay 3.5 7.4 11 3.0 14 3.0 12.5 tPHL Sn to Zn 3.0 7.0 8.5 2.5 11 2.5 9.5 tPLH Propagation Delay 2.5 5.0 7.0 2.0 10 2.0 8.0 tPHL En to Zn 3.0 5.0 7.0 2.5 9.0 2.5 8.0 tPLH Propagation Delay 2.5 4.9 7.0 2.0 9.0 2.0 8.0 tPHL In to Zn 1.5 3.0 3.5 1.0 5.0 1.0 4.0 FAST AND LS TTL DATA 4-159 ns ns