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HD74AC244

Hitachi Semiconductor
Part Number HD74AC244
Manufacturer Hitachi Semiconductor
Description Octal Buffer/Line Driver with 3-State Output
Published Mar 23, 2005
Detailed Description HD74AC244/HD74ACT244 Octal Buffer/Line Driver with 3-State Output Description The HD74AC244/HD74ACT244 is an octal buff...
Datasheet PDF File HD74AC244 PDF File

HD74AC244
HD74AC244

Overview
HD74AC244/HD74ACT244 Octal Buffer/Line Driver with 3-State Output Description The HD74AC244/HD74ACT244 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus-oriented transmitter/receive which provides improved PC board density.
Features • 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers • Outputs Source/Sink 24 mA • HD74ACT244 has TTL-Compatible Inputs Pin Arrangement OE1 1 2 3 4 5 6 7 8 9 GND 10 (Top view) 20 VCC 19 OE2 18 17 16 15 14 13 12 11 HD74AC244/HD74ACT244 Truth Tables Inputs OE1 L L H D L H X Outputs (Pins 12, 14, 16, 18) L H Z Inputs OE2 L L H H L X Z : : : : High Voltage Level Low Voltage Level Immaterial High Impedance D L H X Outputs (Pins 3, 5, 7, 9) L H Z DC Characteristics (unless otherwise specified) Item Maximum quiescent supply current Maximum quiescent supply current Maximum additional ICC/input (HD74ACT244) Symbol I CC I CC I CCT Max 80 8.
0 1.
5 Unit µA µA mA Condition VIN = VCC or ground, VCC = 5.
5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.
5 V, Ta = 25°C VIN = VCC – 2.
1 V, VCC = 5.
5 V, Ta = Worst case 2 HD74AC244/HD74ACT244 AC Characteristics: HD74AC244 Ta = +25°C CL = 50 pF Item Propagation delay Data to output Propagation delay Data to output Output enable time t PZH t PHL Symbol t PLH VCC (V)*1 3.
3 5.
0 3.
3 5.
0 3.
3 5.
0 Output enable time t PZL 3.
3 5.
0 Output disable time t PHZ 3.
3 5.
0 Output disable time t PLZ 3.
3 5.
0 Note: 1.
Voltage Range 3.
3 is 3.
3 V ± 0.
3 V Voltage Range 5.
0 is 5.
0 V ± 0.
5 V Min 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 Typ 6.
5 5.
0 6.
5 5.
0 6.
0 5.
0 7.
5 5.
5 7.
0 6.
5 7.
5 6.
5 Max 9.
0 7.
0 9.
0 7.
0 10.
5 7.
0 10.
0 8.
0 10.
0 9.
0 10.
5 9.
0 Ta = –40°C to +85°C CL = 50 pF Min 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 1.
0 Max 10.
0 7.
5 10.
0 7.
5 11.
0 8.
0 11.
0 8.
5 10.
5 9.
5 11.
5 9.
5 ns ns ns ns ns Unit ns AC Characteristics: HD74ACT244 Ta = +25°C CL = 50 pF Item Propagation delay Data to output Propagation delay Data to output Output enable time O...


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