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74LS645 Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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74LS645 Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 5 page www.fairchildsemi.com 2 Absolute Maximum Ratings(Note 1) Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions Note 2: Voltage values are with respect to the network ground terminal. Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Note 3: For conditions shown as Min or Max, use the appropriate value specified under Recommended Operating Conditions. Note 4: All typicals are at VCC = 5V, TA = 25°C. Note 5: Not more than one output should be shorted at a time, and the duration should not exceed one second. Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range 0 °C to +70°C Storage Temperature Range −55°C to +150°C Symbol Parameter Min Nom Max Units VCC Supply Voltage (Note 2) 4.75 5 5.25 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.6 V IOH HIGH Level Output Current −15 mA IOL LOW Level Output Current 24 mA TA Free Air Operating Temperature 0 70 °C Symbol Parameter Conditions (Note 3) Min Typ Max Units (Note 4) VI Input Clamp Voltage VCC = Min, II = 18 mA −1.5 V HYS Hysteresis (VT+ − V−)VCC = Min 0.2 0.4 V A or B Input VOH HIGH Level Output Voltage VCC = Min, VIH = 2V, IOH = −3 mA 2.4 3.4 V VIL = Max IOH = Max 2 VOL LOW Level Output Voltage VCC = Min, VIH = 2V, IOL = 12 mA 0.25 0.4 V VIL = Max IOL = 24 mA 0.35 0.5 IOZH Off-State Output Current, VCC = Max, G at 2V, 20 µA HIGH Level Voltage Applied VO = 2.7V IOZL Off-State Output Current, VCC = Max, G at 2V −400 µA LOW Level Voltage Applied VO = 0.4V II Input Current at VCC = Max A or B VI = 5.5V 0.1 mA Maximum Input Voltage DIR or G VI = 7V 0.1 IIH HIGH Level Input Current VCC = Max, VIH = 2.7 20 µA IIL LOW Level Input Current VCC = Max, VIL = 0.4V −0.4 mA IOS Short Circuit Output Current (Note 5) VCC = Max −40 −225 mA ICC Total Supply Outputs HIGH VCC = Max, 48 70 Current Outputs LOW Outputs Open 62 90 mA Outputs at Hi-Z 64 95 |
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