PDF《EIA–232–E and CCITT V.28》

MC145403?MC145404?MC145405?MC145408 MOTOROLA

1 Drivers/Receivers EIAC232CE and CCITT V.

28 These devices are silicon gate CMOS ICs that combine both the transmitter and receiver to fulfill the electrical specifications of EIA Standard 232CE and CCITT V.28. The drivers feature true TTL input compatibility, slew rate limiting outputs,

300 ? powerCoff source impedance, and output typically switching to within 25% of the supply rails. The receivers can handle up to ±

25 V while presenting

3 to

7 k? impedance. Hysteresis in the receivers aid in the reception of noisy signals. By combining both drivers and receivers in a single CMOS chip, these devices provide efficient, lowCpower solutions for both EIAC232CE and V.28 applications. These devices offer the following performance features: Drivers ? ±

5 to ±

12 V Supply Range ?

300 ? PowerCOff Source Impedance ? Output Current Limiting ? TTL and CMOS Compatible Inputs ? Driver Slew Rate Range Limited to

30 V/?s Maximum Receivers ? ±

25 V Input Range ?

3 to

7 k? Input Impedance ? 0.8 V of Hysteresis for Enhanced Noise Immunity ? TTL and CMOS Compatible Outputs Available Driver/Receiver Combinations Device Drivers Receivers Figure No. of Pins MC145403

3 5

1 20 MC145404

4 4

2 20 MC145405

5 3

3 20 MC145408

5 5

4 24 Alternative EIAC232 devices to consider are: Three Supply Single Supply MC145406 (3 x 3) MC145407 (3 x 3) MC145705 (2 x 3) with Power Down MC145706 (3 x 2) with Power Down MC145707 (3 x 3) with Power Down Order this document by MC145403/D MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC145403 MC145404 MC145405 MC145408 P SUFFIX PLASTIC DIP CASE

738 ORDERING INFORMATION MC145403P Plastic DIP MC145404P Plastic DIP MC145405P Plastic DIP MC145408P Plastic DIP MC145403DW SOG Package MC145404DW SOG Package MC145405DW SOG Package MC145408DW SOG Package MC145405SD SSOP P SUFFIX PLASTIC DIP CASE

724 DW SUFFIX SOG PACKAGE CASE 751E DW SUFFIX SOG PACKAGE CASE 751D

20 1

24 1

20 1

24 1 SD SUFFIX SSOP CASE 940C

20 1 ? Motorola, Inc.

1998 REV

3 2/98 TN98043000 MC145403?MC145404?MC145405?MC145408 MOTOROLA

2 MC145403

3 DRIVERS/5 RECEIVERS R R D D R D VDD Rx1 Tx1 Rx2 Rx3 Tx2 Rx4 Rx5 Tx3 VSS VCC DO1 DI1 DO2 DO3 DI2 DO4 DO5 DI3 GND

20 19

18 17

16 15

14 13

12 11

1 2

3 4

5 6

7 8

9 10 PIN ASSIGNMENTS (DIP, SOG, AND SSOP) MC145404

4 DRIVERS/4 RECEIVERS R R R D D R D D VDD Rx1 Tx1 Rx2 Tx2 Rx3 Tx3 Rx4 Tx4 VSS VCC DO1 DI1 DO2 DI3 DO3 DI3 DO4 DI4 GND

20 19

18 17

16 15

14 13

12 11

1 2

3 4

5 6

7 8

9 10 MC145405

5 DRIVERS/3 RECEIVERS R D D R D D VDD Rx1 Tx1 Tx2 Rx2 Tx3 Tx4 Rx3 Tx5 VSS VCC DO1 DI1 DI2 DO2 DI3 DI4 DO3 DI5 GND

20 19

18 17

16 15

14 13

12 11

1 2

3 4

5 6

7 8

9 10 R D R D R D R D R D VDD Rx1 Tx1 Rx2 Tx2 Rx3 Tx3 Rx4 Tx4 Rx5

1 2

3 4

5 6

7 8

9 10 DI1 DO2 DI2 DO3 DI3 DO4 DI4 DO5 DI5 GND

22 21

20 19

18 17

16 15

14 13

24 23

11 12 VCC DO1 VSS Tx5 MC145408

5 DRIVERS/5 RECEIVERS R R R D FUNCTIONAL DIAGRAM ESD PROTECTION + C DO Rx 5.4 k?

15 k? VDD VSS VCC Tx

300 ? + C LEVEL SHIFT 1.0 V 1.8 V VCC DI 1.4 V VCC VSS RECEIVER DRIVER VDD + C MC145403?MC145404?MC145405?MC145408 MOTOROLA

3 ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND, except where noted) Rating Symbol Value Unit DC Supply Voltage (VDD ≥ VCC) VDD VSS VCC C 0.5 to + 13.5 + 0.5 to C 13.5 C 0.5 to + 6.0 V Input Voltage Range Rx1 C Rxn DI1 C DIn VIR VSS C

15 to VDD +

15 0.5 to VCC +

15 V DC Current Drain per Pin I ±