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MC74VHCT245A Folha de dados(PDF) 2 Page - ON Semiconductor |
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MC74VHCT245A Folha de dados(HTML) 2 Page - ON Semiconductor |
2 / 7 page MC74VHCT245A http://onsemi.com 2 Figure 1. Logic Diagram A DATA PORT A8 A7 A6 A5 A3 A4 A2 A1 9 8 7 6 5 4 3 2 DIR OE 1 19 18 17 16 15 14 13 12 11 B1 B2 B3 B4 B5 B6 B7 B8 B DATA PORT Figure 2. Pin Assignment A5 A3 A2 A1 DIR GND A8 A7 A6 A4 5 4 3 2 1 10 9 8 7 6 14 15 16 17 18 19 20 11 12 13 B3 B2 B1 OE VCC B8 B7 B6 B5 B4 OE DIR Operation L L H L H X Data Tx from Bus B to Bus A Data Tx from Bus A to Bus B Buses Isolated (High−Z State) Control Inputs FUNCTION TABLE MAXIMUM RATINGS Symbol Parameter Value Unit VCC DC Supply Voltage – 0.5 to + 7.0 V Vin DC Input Voltage – 0.5 to + 7.0 V VI/O DC Output Voltage Outputs in 3−State High or Low State – 0.5 to + 7.0 – 0.5 to VCC + 0.5 V IIK Input Diode Current − 20 mA IOK Output Diode Current (VOUT < GND; VOUT > VCC) ± 20 mA Iout DC Output Current, per Pin ± 25 mA ICC DC Supply Current, VCC and GND Pins ± 75 mA PD Power Dissipation in Still Air, SOIC Packages† TSSOP Package† 500 450 mW Tstg Storage Temperature – 65 to + 150 _C Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. †Derating − SOIC Packages: – 7 mW/ _C from 65_ to 125_C TSSOP Package: − 6.1 mW/ _C from 65_ to 125_C RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit VCC DC Supply Voltage 4.5 5.5 V Vin DC Input Voltage 0 5.5 V VI/O DC Output Voltage Outputs in 3−State High or Low State 0 0 5.5 VCC V TA Operating Temperature − 40 + 85 _C tr, tf Input Rise and Fall Time VCC =5.0V ±0.5V 0 20 ns/V This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high−impedance cir- cuit. For proper operation, Vin and Vout should be constrained to the range GND v (Vin or Vout) v VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. |
Nº de peça semelhante - MC74VHCT245A_06 |
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Descrição semelhante - MC74VHCT245A_06 |
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