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| 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. MC54/74F353 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 16 1 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 ORDERING INFORMATION CONNECTION DIAGRAM (TOP VIEW) VCC 16 OEb 15 S0 14 I3b 13 I2b 12 I1b 11 I0b 10 Zb 9 MC54FXXXJ MC74FXXXN MC74FXXXD Ceramic Plastic SOIC LOGIC SYMBOL 2 S1 1 OEa 2 S1 3 I3a 4 I2a 5 I1a 6 I0a 7 Za 8 GND 7 Za 14 S0 OEa I0a I1a I2a I3a I0b I1b I2b I3b OEb 1 6 5 4 3 10 11 12 13 15 9 VCC = PIN 16 GND = PIN 8 Zb FAST AND LS TTL DATA 4-160 MC54/74F353 FUNCTION TABLE Select Inputs S0 X L L H H L L H H S1 X L L L L H H H H I0 X L H X X X X X X Data Inputs I1 X X X L H X X X X I2 X X X X X L H X X I3 X X X X X X X L H Output Enable OE H L L L L L L L L Output Z (Z) H L H L H L H 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 Zb Za GUARANTEED OPERATING RANGES Symbol VCC TA Supply Voltage Operating Ambient Temperature Range Parameter 54, 74 54 74 IOH IOL Output Current High Output Current Low 54, 74 54, 74 Min 4.5 -55 0 Typ 5.0 25 25 Max 5.5 125 70 -3.0 24 mA mA Unit V C FAST AND LS TTL DATA 4-161 MC54/74F353 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol VIH VIL VIK VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 54, 74 74 VOL IOZH IOZL IIH Output LOW Voltage Output OFF Current -- HIGH Output OFF Current -- LOW Input HIGH Current 2.4 2.7 3.3 3.3 0.35 0.5 50 -50 20 100 IIL IOS ICCH ICCL ICCZ Power Supply Current Input LOW Current Output Short Circuit Current (Note 2) -60 9.3 13.3 15 -0.6 -150 14 20 23 mA mA mA Min 2.0 0.8 -1.2 Typ Max Unit V V V V V V A A A Test Conditions Guaranteed Input HIGH Voltage Guaranteed Input LOW Voltage IIN = -18 mA IOH = -3.0 mA IOH = -3.0 mA IOL = 24 mA VOUT = 2.7 V VOUT = 0.5 V VIN = 2.7 V VIN = 7.0 V VIN = 0.5 V VOUT = 0 V In, Sn, OEn = GND In, Sn = GND OEn = 4.5 V VCC = MAX VCC = MAX VCC = MAX VCC = MIN VCC = 4.5 V VCC = 4.75 V VCC = MIN VCC = MAX VCC = MAX VCC = MAX 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 TA = +25C VCC = +5.0 V CL = 50 pF Symbol tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Output Disable Time Parameter Propagation Delay Sn to Zn Propagation Delay In to Zn Output Enable Time Min 3.5 3.0 2.5 1.0 3.0 3.5 2.0 2.0 Max 11 8.5 7.0 3.5 8.0 8.0 5.0 6.0 54F TA = - 55C to + 125C VCC = 5.0 V 10% CL = 50 pF Min 3.0 2.5 2.0 1.0 3.0 3.0 2.0 1.5 Max 14 11 9.0 5.0 10.5 10.5 7.0 8.0 74F TA = 0C to + 70C VCC = 5.0 V 10% CL = 50 pF Min 3.0 2.5 2.0 1.0 3.0 3.0 1.5 1.5 Max 12.5 9.5 8.0 4.0 9.0 9.0 6.0 7.0 ns ns Unit ns FAST AND LS TTL DATA 4-162 |
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