PDF《EIA–232–E and CCITT V.28》

00 mA Power Dissipation PD

1 W Operating Temperature Range TA C

40 to +

85 °C Storage Temperature Range Tstg C

85 to +

150 °C DC ELECTRICAL CHARACTERISTICS (All polarities referenced to GND =

0 V, TA = C

40 to + 85°C) Parameter Symbol Min Typ Max Unit DC Supply Voltage VDD VSS VCC 4.5 C 4.5 4.5

5 to

12 C

5 to C

12 5 13.2 C 13.2 5.5 V Quiescent Supply Current (Outputs Unloaded, Inputs Low) VDD = +

12 V VSS = C

12 V VCC = +

5 V IDD ISS ICC ― ― ―

425 C

400 110

635 C

600 200 ?A RECEIVER ELECTRICAL SPECIFICATIONS (Voltage polarities referenced to GND =

0 V, VDD = +

12 V, VSS = C

12 V, TA = C

40 to + 85°C, VCC = +

5 V, ± 10%) Characteristic Symbol Min Typ Max Unit Input TurnCOn Threshold Rx1 C Rxn VDO = VOL Von 1.35 1.8 2.35 V Input TurnCOff Threshold Rx1 C Rxn VDO = VOH Voff 0.75

1 1.25 V Input Threshold Hysteresis ? = Von C Voff Vhys 0.6 0.8 ― V Input Resistance (VSS C

15 V) ≤ V Rx1 C Rxn ≤ (VDD +

15 V) Rin

3 5.4

7 k? High Level Output Voltage Iout = C

20 ?A VRx = C

3 to C

25 V* (DO1 C DOn) Iout = C 1.0 mA VOH 4.9 3.8 4.9 4.3 ― ― V Low Level Output Voltage Iout = +

2 mA VRx = +

3 to +

25 V* (DO1 C DOn) Iout = +

4 mA VOL ― ― 0.02 0.5 0.5 0.7 V * This is the range of input voltages as specified by EIAC232CE to cause a receiver to be in the high or low. This device contains circuitry to protect the inputs and outputs against damage due to high static voltages or electric fields;

however, it is advised that normal precautions be taken to avoid applications of any voltage higher than maximum rated voltages to this high imped- ance circuit. For proper operation it is recommended that Vout and Vin be constrained to the ranges described as follows: Digital I/O: Driver Inputs (DI): (GND ≤ VDI ≤ VCC). Receiver Outputs (DO): (GND ≤ VDO ≤ VCC). EIAC232 I/O: Driver Outputs (Tx): (VSS ≤ VTx1 C Txn ≤ VDD). Receiver Inputs (Rx): VSS C

15 V ≤ VRx1 C Rxn ≤ VDD +

15 V). Reliabilityof operation isenhancedifunused outputs are tied off to an appropriate logic voltage level (e.g., either GND or VCC for DI, and GND for Rx). MC145403?MC145404?MC145405?MC145408 MOTOROLA

4 DRIVER ELECTRICAL SPECIFICATIONS (Voltage Polarities Referenced to GND =

0 V, VDD = +

12 V, VSS = C

12 V, TA = C

40 to + 85°C, VCC = +

5 V, ± 10%) Characteristic Symbol Min Typ Max Unit Digital Input Voltage DI1 C DIn Logic

0 Logic

1 VIL VIH ―

2 ― ― 0.8 ― V Input Current DI1 C DIn VDI = GND VDI = VCC IIL IIH ― ―

7 ― ― ± 1.0 ?A Output High Voltage Tx1 C Txn VDI = Logic 0, RL =

3 k? VDD = + 5.0 V, VSS = C 5.0 V VDD = + 6.0 V, VSS = C 6.0 V VDD = + 12.0 V, VSS = C 12.0 V VOH 3.5 4.3 9.2 3.9 4.7 9.5 ― ― ― V Output Low Voltage* Tx1 C Txn VDI = Logic 1, RL =

3 k? VDD = + 5.0 V, VSS = C 5.0 V VDD = + 6.0 V, VSS = C 6.0 V VDD = + 12.0 V, VSS = C 12.0 V VOL C

4 C 4.5 C

10 C 4.3 C 5.2 C 10.3 ― ― ― V Input Current Tx1 C Txn (Figure 5) Zoff

300 ― ― ? Output Short Circuit Current Tx1 C Txn VDD = +

12 V, VSS = C

12 V Tx Shorted to GND** Tx Shorted to ±

15 V*** ISC ― ― ±

22 ±

60 ±

60 ±

100 mA *Voltage specifications are in terms of absolute values. **Specification is for one Tx output pin to be shorted at a time. Should all three driver outputs be shorted simultaneously, device power dissipation limits will be exceeded. *** This condition could exceed package limitations. SWITCHING CHARACTERISTICS (VCC = +

5 V, ± 10%, VDD = +

12 V, VSS = C

12 V, TA = C