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| MC54/74F280 9-BIT PARITY GENERATOR/ CHECKER The MC54/74F280 is a high-speed parity generator/checker that accepts nine bits of input data and detects whether an even or an odd number of these inputs is HIGH. If an even number of inputs is HIGH, the Sum Even output is HIGH. If an odd number is HIGH, the Sum Even output is LOW. The Sum Odd output is the complement of the Sum Even output. 9-BIT PARITY GENERATOR/CHECKER FASTTM SCHOTTKY TTL CONNECTION DIAGRAM VCC 14 I5 13 I4 12 I3 11 I2 10 I1 9 I0 8 14 1 J SUFFIX CERAMIC CASE 632-08 1 I6 2 I7 3 NC 4 I8 5 E 6 O 7 GND 14 1 N SUFFIX PLASTIC CASE 646-06 LOGIC DIAGRAM I8 I7 I6 I5 I4 I3 I2 I1 I0 D SUFFIX SOIC CASE 751A-02 14 1 ORDERING INFORMATION MC54FXXXJ MC74FXXXN MC74FXXXD Ceramic Plastic SOIC LOGIC SYMBOL 8 9 10 11 12 13 1 2 4 I0 I1 I2 I3 I4 I5 I6 I7 I8 O O E 6 E 5 VCC = PIN 14 GND = PIN 7 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 4-143 MC54/74F280 FUNCTION TABLE Number of HIGH Inputs I0-I8 0, 2, 4, 6, 8 1, 3, 5, 7, 9 H = HIGH Voltage Level; L = LOW Voltage Level Outputs Even H L Odd L H 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 -1.0 20 mA mA Unit V C 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 IIH Output Low Voltage Input HIGH Current 2.5 2.7 3.4 3.4 0.35 0.5 20 100 IIL IOS ICC Input LOW Current Short Circuit Current (Note 2) Power Supply Current -60 25 -0.6 -150 38 Min 2.0 0.8 -1.2 Typ Max Unit V V V V V V A A mA mA mA Test Conditions Guaranteed Input HIGH Voltage for All Inputs Guaranteed Input LOW Voltage for All Inputs VCC = MIN, IIN = -18 MA IOH = -1.0 mA IOH = 1.0 mA IOL = 20 mA VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 7.0 V VCC = MAX, VIN = 0.5 V VCC = MAX, VOUT = 0 V VCC = MAX VCC = 4.5 V VCC = 4.75 V VCC = MIN 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. FAST AND LS TTL DATA 4-144 MC54/74F280 AC CHARACTERISTICS 54/74F TA = +25C VCC = +5.0 V CL = 50 pF Symbol tPLH tPHL tPLH tPHL Parameter Propagation Delay In to E Propagation Delay In to O Min 4.5 4.5 4.5 4.5 Max 15 16 15 16 54F TA = -55C to +125C VCC = 5.0 V 10% CL = 50 pF Min 4.5 4.5 4.5 4.5 Max 20 21 20 21 74F TA = 0C to +70C VCC = 5.0 V 10% CL = 50 pF Min 4.5 4.5 4.5 4.5 Max 16 17 16 17 ns Unit ns FAST AND LS TTL DATA 4-145 |
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