MC54/74F353 DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS The MC54/74F353 is a dual 4-input multiplexer with 3-state outputs. It can select two bits of data from four sources using common Select inputs. The outputs may be individually switched to a high impedance state with a HIGH on the respective Output Enable (OE) inputs, allowing the outputs to interface directly with bus-oriented systems. DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS • Inverted Version of F253 • Multifunction Capability • Separate Enables for Each Multiplexer J SUFFIX CERAMIC CASE 620-09 FUNCTIONAL DESCRIPTION The MC54/74F353 contains two identical 4-input multiplexers with 3-state outputs. They select two bits from four sources selected by common Select inputs (S0, S1).The 4-input multiplexers have individual Output enable (OEa, OEb) inputs which, when HIGH, force the outputs to a high impedance (high Z) state. The logic equations for the outputs are shown below: Za=OEa • (I0a • S1 • S0 +I1a • S1 • S0 + I2a • S1 • S0 + I3a • S1 • S0) Zb=OEb• (I0b • S1 • S0 + I1b • S1 • S0 + I2b•S1•S0+I3b•S1•S0) If the outputs of 3-state devices are tied together, all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings. Designers should ensure that Output Enable signals to 3-state devices whose outputs are tied together are designed so that there is no overlap. 16 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 16 1 ORDERING INFORMATION MC54FXXXJ MC74FXXXN MC74FXXXD CONNECTION DIAGRAM (TOP VIEW) VCC OEb S0 I3b I2b I1b I0b Zb 16 15 14 13 12 11 10 9 Ceramic Plastic SOIC LOGIC SYMBOL 2 S1 1 2 3 4 5 6 7 8 OEa S1 I3a I2a I1a I0a Za GND 7 9 VCC = PIN 16 GND = PIN 8 FAST AND LS TTL DATA 4-160 Za Zb 14 S0 OEa I0a I1a I2a I3a I0b I1b I2b I3b OEb 1 6 5 4 3 10 11 12 13 15 MC54/74F353 FUNCTION TABLE Select Inputs Output Enable Data Inputs Output S0 S1 I0 I1 I2 I3 OE Z X X X X X X H (Z) L L L X X X L H L L H X X X L L H L X L X X L H H L X H X X L L L H X X L X L H L H X X H X L L H H X X X L L H H H X X X H L L Address inputs S0 and S1 are common to both sections. H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care (Z) = High Impedance LOGIC DIAGRAM OEb I3b I2b I1b I0b S0 S1 I3a I2a I1a I0a OEa Za Zb GUARANTEED OPERATING RANGES Symbol VCC TA Parameter Supply Voltage Min Typ 54, 74 4.5 54 –55 74 0 Operating Ambient Temperature Range Max Unit 5.0 5.5 V 25 125 °C 25 70 IOH Output Current High 54, 74 –3.0 mA IOL Output Current Low 54, 74 24 mA FAST AND LS TTL DATA 4-161 MC54/74F353 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 Unit 2.0 Test Conditions V Guaranteed Input HIGH Voltage 0.8 V Guaranteed Input LOW Voltage –1.2 V IIN = –18 mA VCC = MIN 54, 74 2.4 3.3 V IOH = –3.0 mA VCC = 4.5 V 74 2.7 3.3 V IOH = –3.0 mA VCC = 4.75 V 0.5 V IOL = 24 mA VCC = MIN VOL Output LOW Voltage 0.35 IOZH Output OFF Current — HIGH 50 µA VOUT = 2.7 V VCC = MAX IOZL Output OFF Current — LOW –50 µA VOUT = 0.5 V VCC = MAX IIH Input HIGH Current 20 µA VIN = 2.7 V VCC = MAX 100 IIL Input LOW Current IOS Output Short Circuit Current (Note 2) –60 ICCH ICCL Power Supply Current ICCZ VIN = 7.0 V –0.6 mA VIN = 0.5 V VCC = MAX –150 mA VOUT = 0 V VCC = MAX 9.3 14 13.3 20 15 23 In, Sn, OEn = GND mA In, Sn = GND VCC = MAX OEn = 4.5 V 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 CHARACTERISTICS 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 Symbol Parameter CL = 50 pF CL = 50 pF Min Max Min Max Min Max Unit ns tPLH Propagation Delay 3.5 11 3.0 14 3.0 12.5 tPHL Sn to Zn 3.0 8.5 2.5 11 2.5 9.5 tPLH Propagation Delay 2.5 7.0 2.0 9.0 2.0 8.0 tPHL In to Zn 1.0 3.5 1.0 5.0 1.0 4.0 tPZH Output Enable Time 3.0 8.0 3.0 10.5 3.0 9.0 3.5 8.0 3.0 10.5 3.0 9.0 2.0 5.0 2.0 7.0 1.5 6.0 2.0 6.0 1.5 8.0 1.5 7.0 tPZL tPHZ tPLZ Output Disable Time FAST AND LS TTL DATA 4-162 ns ns