MC54/74F240 MC54/74F241 MC54/74F244 OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS The F240, F241 and F244 are octal buffers and line drivers designed to be employed as memory address drivers, clock drivers, and bus-oriented transmitters/receivers which provide improved PC board density. • 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers • Outputs Sink 64 mA • 15 mA Source Current • Input Clamp Diodes Limit High-Speed Termination Effects • ESD > 4000 Volts OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS FAST SCHOTTKY TTL CONNECTION DIAGRAMS MC54/74F240 VCC OEb Ya0 20 19 18 J SUFFIX CERAMIC CASE 732-03 20 Ib0 Ya1 Ib1 Ya2 Ib2 Ya3 Ib3 17 16 15 14 13 12 11 1 N SUFFIX PLASTIC CASE 738-03 20 1 1 2 OEa Ia0 3 4 5 6 7 8 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 9 10 Yb3 GND 20 1 VCC OEb Ya0 20 19 18 MC54/74F241 Ib0 Ya1 Ib1 Ya2 Ib2 Ya3 Ib3 17 13 12 16 15 14 11 DW SUFFIX SOIC CASE 751D-03 ORDERING INFORMATION MC54FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC 1 2 3 4 5 6 7 8 OEa Ia0 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 Yb3 GND MC54/74F244 VCC OEb Ya0 Ib0 Ya1 Ib1 Ya2 Ib2 Ya3 Ib3 9 10 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 OEa Ia0 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 Yb3 GND FAST AND LS TTL DATA 4-108 MC54/74F240 • MC54/74F241 • MC54/74F244 FUNCTION TABLE MC54/74F240 Inputs OEa L L H Ia L H X OEb L L H FUNCTION TABLE MC54/74F241 Inputs Outputs Ib L H X Ya H L Z Yb H L Z OEa L L H Ia L H X OEb H H L FUNCTION TABLE MC54/74F244 Outputs Ib L H X Ya L H Z Yb L H Z Inputs OEa Ia L L L H H X OEb Ib L L L H H X Outputs Ya L H Z Yb L H Z H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care; Z = High Impedance GUARANTEED OPERATING RANGES Symbol Parameter VCC Supply Voltage TA Operating Ambient Temperature Range IOH IOL Min Typ 54, 74 4.5 5.0 5.5 V 54 –55 25 125 °C 74 0 25 70 Output Current — High Output Current — Low 54 –12 74 –15 54 48 74 64 FAST AND LS TTL DATA 4-109 Max Unit mA mA MC54/74F240 • MC54/74F241 • MC54/74F244 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 Min Typ Max 2.0 Unit 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 3.4 V IOH = –3.0 mA VCC = 4.50 V 74 2.7 3.4 V IOH = –3.0 mA VCC = 4.75 V 54 2.0 V IOH = –12 mA VCC = 4.50 V 74 2.0 V IOH = –15 mA VCC = 4.50 V 54 0.55 V IOL = 48 mA VCC = MIN 74 0.55 V IOL = 64 mA 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 IOS ICCH Input LOW Current Data Inputs F241, F244 –1.6 Other –1.0 VIN = 7.0 V mA VIN = 0.5 V VCC = MAX VOUT = GND VCC = MAX Output Short Circuit Current 74 –100 –225 mA (Note 2) 54 –100 –275 mA Power Supply Current HIGH ICCL Power Supply Current LOW ICCZ Power Supply Current OFF F240 35 F241, F244 60 F240 75 F241, F244 90 F240 75 F241, F244 90 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 4-110 MC54/74F240 • MC54/74F241 • MC54/74F244 AC CHARACTERISTICS – MC54/74F240 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 Symbol Parameter Min Typ Max Min Max Min Max Unit tPLH Propagation Delay, Data to Output 2.5 5.1 7.0 2.5 9.0 2.5 8.0 ns 1.5 3.5 4.7 1.5 6.0 1.5 5.7 2.0 3.5 5.2 2.0 6.5 2.0 5.7 4.0 6.9 9.0 4.0 13.5 4.0 10 2.0 4.0 5.3 2.0 6.5 2.0 6.3 1.5 6.0 8.0 2.0 12.5 1.5 9.5 tPHL tPZH Output Enable Time tPZL tPHZ Output Disable Time tPLZ ns ns AC CHARACTERISTICS – MC54/74F241 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 Symbol Parameter Min Typ Max Min Max Min Max Unit tPLH Propagation Delay, Data to Output 2.5 4.0 5.2 2.0 6.5 2.5 6.2 ns 2.5 4.0 5.2 2.0 7.0 2.5 6.5 2.0 4.3 5.7 2.0 7.0 2.0 6.7 2.0 5.4 7.0 2.0 8.5 2.0 8.0 2.0 4.5 6.0 2.0 7.0 2.0 7.0 2.0 4.5 6.5 2.0 12.5 2.0 7.5 tPHL tPZH Output Enable Time tPZL tPHZ Output Disable Time tPLZ ns ns AC CHARACTERISTICS – MC54/74F244 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 Symbol Parameter Min Typ Max Min Max Min Max Unit tPLH Propagation Delay, Data to Output 2.5 4.0 5.2 2.5 6.5 2.5 6.2 ns 2.5 4.0 5.2 2.5 7.0 2.5 6.5 2.0 4.3 5.7 2.0 7.0 2.0 6.7 2.0 5.4 7.0 2.0 8.5 2.0 8.0 2.0 4.5 6.0 2.0 7.0 2.0 7.0 2.0 4.5 6.0 2.0 10.0 2.0 7.0 tPHL tPZH Output Enable Time tPZL tPHZ tPLZ Output Disable Time FAST AND LS TTL DATA 4-111 ns ns