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 FAST SCHOTTKY TTL CONNECTION DIAGRAM VCC I5 I4 I3 I2 I1 I0 14 13 12 11 10 9 8 J SUFFIX CERAMIC CASE 632-08 14 1 1 2 3 4 5 6 7 I6 I7 NC I8 ∑E ∑O GND N SUFFIX PLASTIC CASE 646-06 14 1 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 ΣO ΣO 6 ΣE ΣE 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 Outputs ∑ Even ∑ Odd 0, 2, 4, 6, 8 H L 1, 3, 5, 7, 9 L H I0-I8 H = HIGH Voltage Level; L = LOW Voltage Level 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 Min Typ Max Test Conditions V Guaranteed Input HIGH Voltage for All Inputs VIH Input HIGH Voltage VIL Input LOW Voltage 0.8 V Guaranteed Input LOW Voltage for All Inputs VIK Input Clamp Diode Voltage –1.2 V VCC = MIN, IIN = –18 MA VOH Output HIGH Voltage VOL Output Low Voltage IIH Input HIGH Current IIL Input LOW Current IOS Short Circuit Current (Note 2) ICC Power Supply Current 2.0 Unit 54, 74 2.5 3.4 V IOH = –1.0 mA VCC = 4.5 V 74 2.7 3.4 V IOH = 1.0 mA VCC = 4.75 V 0.5 V IOL = 20 mA VCC = MIN 20 µA VCC = MAX, VIN = 2.7 V 100 µA VCC = MAX, VIN = 7.0 V 0.35 –60 25 –0.6 mA VCC = MAX, VIN = 0.5 V –150 mA VCC = MAX, VOUT = 0 V 38 mA 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. FAST AND LS TTL DATA 4-144 MC54/74F280 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 Max Min Max Min Max Unit ns tPLH Propagation Delay 4.5 15 4.5 20 4.5 16 tPHL In to ∑E 4.5 16 4.5 21 4.5 17 tPLH Propagation Delay 4.5 15 4.5 20 4.5 16 tPHL In to ∑O 4.5 16 4.5 21 4.5 17 FAST AND LS TTL DATA 4-145 ns