Motorola MC145408P, MC145403DW, MC145403P, MC145404P, MC145405DW Datasheet

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Order this document

by MC145403/D

MC145403

Drivers/Receivers

EIA–232–E 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 232–E and
CCITT V.28. The drivers feature true TTL input compatibility, slew rate limiting
outputs, 300 Ω power–off 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 kΩ 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, low–power solutions for both EIA–232–E
and V.28 applications.

These devices offer the following performance features:

Drivers

•± 5 to ± 12 V Supply Range

• 300 Ω Power–Off Source Impedance

• Output Current Limiting

• TTL and CMOS Compatible Inputs

• Driver Slew Rate Range Limited to 30 V/µs Maximum

Receivers

•± 25 V Input Range

• 3 to 7 kΩ 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 EIA–232 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

MC145404
MC145405
MC145408

PLASTIC DIP

20

1

PLASTIC DIP

24

1

DW SUFFIX

20

1

24

1

20

1

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

SOG PACKAGE

CASE 751D

DW SUFFIX

SOG PACKAGE

CASE 751E

SD SUFFIX

CASE 940B

P SUFFIX

CASE 738

P SUFFIX

CASE 724

SSOP

REV 2
1/97 TN97010600

 Motorola, Inc. 1997

MC145403•MC145404•MC145405•MC145408MOTOROLA

1

PIN ASSIGNMENTS

(DIP, SOG, AND SSOP)

MC145403

3 DRIVERS/5 RECEIVERS

V

Rx1

Tx1

Rx2

Rx3

Tx2

Rx4

Rx5

Tx3

V

DD

SS

1

2

3

4

5

6

7

8

9

10

20

V

CC

19

R

R

R

R

R

DO1

18

D

DI1

17

DO2

16

DO3

15

D

DI2

14

DO4

13

DO5

12

D

DI3

11

GND

MC145404

4 DRIVERS/4 RECEIVERS

V

Rx1

Tx1

Rx2

Tx2

Rx3

Tx3

Rx4

Tx4

V

DD

SS

1

2

3

4

5

6

7

8

9

10

20

V

CC

19

R

R

R

R

DO1

18

D

DI1

17

DO2

16

D

DI3

15

DO3

14

D

DI3

13

DO4

12

D

DI4

11

GND

MC145405

5 DRIVERS/3 RECEIVERS

V

Rx1

Tx1

Tx2

Rx2

Tx3

Tx4

Rx3

Tx5

V

DD

SS

1

2

3

4

5

6

7

8

9

10

20

V

CC

19

R

R

R

DO1

18

D

DI1

17

D

DI2

16

DO2

15

D

DI3

14

D

DI4

13

DO3

12

D

DI5

11

GND

MC145408

5 DRIVERS/5 RECEIVERS

V

Rx1

Tx1

Rx2

Tx2

Rx3

Tx3

Rx4

Tx4

Rx5

Tx5

DD

1

2

3

4

5

6

7

8

9

10

11

24

V

CC

23

R

R

R

R

R

DO1

22

D

DI1

21

DO2

20

DI2

D

19

DO3

18

D

DI3

17

DO4

16

D

DI4

15

DO5

14

D

DI5

ESD

PROTECTION

Rx

5.4 k

15 k

Ω

FUNCTIONAL DIAGRAM

RECEIVER DRIVER

V

DD

V

Ω

V

+
–

SS

CC

1.0 V

1.8 V

DO

Tx

300

Ω

CC

13

GND

V

CC

+

+
–

–

DI

1.4 V

12

V

SS

V

DD

LEVEL

SHIFT

V

SS

V

MC145403•MC145404•MC145405•MC145408 MOTOROLA
2

ABSOLUTE MAXIMUM RATINGS

(Voltages referenced to GND, except where noted)

Rating

DC Supply Voltage (VDD ≥ VCC) V

Input Voltage Range

Rx1 – Rx

DI1 – DI
DC Current Drain per Pin I ± 00 mA
Power Dissipation P
Operating Temperature Range T
Storage Temperature Range T

Symbol V alue Unit

DD

V

SS

V

CC

V

IR

n
n

D
A

stg

– 0.5 to + 13.5
+ 0.5 to – 13.5

– 0.5 to + 6.0

VSS – 15 to VDD+ 15

0.5 to VCC+ 15

1 W

– 40 to + 85 °C

– 85 to + 150 °C

This device contains circuitry to protect the

V

V

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 imped­ance circuit.

For proper operation it is recommended that

V

and Vin be constrained to the ranges

out

described as follows:

Digital I/O: Driver Inputs (DI):

(GND ≤ VDI ≤ VCC).

Receiver Outputs (DO):

(GND ≤ VDO ≤ VCC).

EIA–232 I/O: Driver Outputs (Tx):

(VSS ≤ V

Receiver Inputs (Rx):

VSS – 15 V ≤ V

Reliability of operation is enhanced if unused
outputs are tied off to an appropriate logic
voltage level (e.g., either GND or VCC for DI,
and GND for Rx).

Tx1 – Tx

+ 15 V).

≤ VDD).

n

Rx1 – Rx

n

≤ V

DD

DC ELECTRICAL CHARACTERISTICS (All polarities referenced to GND = 0 V , T

Parameter

DC Supply Voltage V

Quiescent Supply Current (Outputs Unloaded, Inputs Low) VDD = + 12 V

VSS = – 12 V

VCC = + 5 V

= – 40 to + 85°C)

A

Symbol Min Typ Max Unit

DD

V

SS

V

CC

I

DD

I

SS

I

CC

4.5

– 4.5

4.5
—

—
—

5 to 12

– 5 to – 12

5

425

– 400

110

RECEIVER ELECTRICAL SPECIFICATIONS

(Voltage polarities referenced to GND = 0 V, VDD = + 12 V, VSS = – 12 V, TA = – 40 to + 85°C, VCC = + 5 V, ± 10%)

Characteristic

Input Turn–On Threshold Rx1 – Rx

VDO = V

Input Turn–Off Threshold Rx1 – Rx

VDO = V

Input Threshold Hysteresis

∆ = Von – V

Input Resistance

(VSS – 15 V) ≤ V Rx1 – Rx

High Level Output Voltage I

VRx = – 3 to – 25 V* (DO1 – DO

Low Level Output Voltage I

VRx = + 3 to + 25 V* (DO1 – DO

*This is the range of input voltages as specified by EIA–232–E to cause a receiver to be in the high or low.

OL

OH

off

n

≤ (VDD + 15 V)

= – 20 µA

n

)I

n

)I

out

= – 1.0 mA

out

= + 2 mA

out

= + 4 mA

out

Symbol Min Typ Max Unit

n

V

on

n

V

off

V

hys

R

in

V

OH

V

OL

1.35 1.8 2.35 V

0.75 1 1.25 V

0.6 0.8 — V

3 5.4 7 kΩ

4.9

3.8
—

—

4.9

4.3

0.02

0.5

13.2

– 13.2

5.5

635

– 600

200

—
—

0.5

0.7

V

µA

V

V

MC145403•MC145404•MC145405•MC145408MOTOROLA

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