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MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Order this document

by MC145403/D

MC145403

Drivers/Receivers

MC145404

MC145405

MC145408

EIA鈥?32鈥揈 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鈥揈 and

CCITT V.28. The drivers feature true TTL input compatibility, slew rate limiting

outputs, 300

鈩?/div>

power鈥搊ff source impedance, and output typically switching to

within 25% of the supply rails. The receivers can handle up to

卤

25 V while

presenting 3 to 7 k鈩?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鈥損ower solutions for both EIA鈥?32鈥揈

and V.28 applications.

These devices offer the following performance features:

Drivers

鈥?/div>

卤

5 to

卤

12 V Supply Range

300

鈩?/div>

Power鈥揙ff Source Impedance

Output Current Limiting

TTL and CMOS Compatible Inputs

Driver Slew Rate Range Limited to 30 V/碌s Maximum

卤

25 V Input Range

3 to 7 k鈩?Input Impedance

0.8 V of Hysteresis for Enhanced Noise Immunity

TTL and CMOS Compatible Outputs

24

1

20

1

P SUFFIX

PLASTIC DIP

CASE 738

P SUFFIX

PLASTIC DIP

CASE 724

Receivers

20

1

DW SUFFIX

SOG PACKAGE

CASE 751D

Available Driver/Receiver Combinations

Device

MC145403

MC145404

MC145405

MC145408

Drivers

3

4

5

Receivers

5

4

3

5

Figure

1

2

3

4

No. of Pins

20

24

DW SUFFIX

SOG PACKAGE

CASE 751E

1

20

1

SD SUFFIX

SSOP

CASE 940B

Alternative EIA鈥?32 devices to consider are:

Three Supply

MC145406 (3 x 3)

Single Supply

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

ORDERING INFORMATION

MC145403P

MC145404P

MC145405P

MC145408P

MC145403DW

MC145404DW

MC145405DW

MC145408DW

MC145405SD

Plastic DIP

SOG Package

SSOP

REV 2

1/97

TN97010600

漏

Motorola, Inc. 1997

MOTOROLA

MC145403鈥C145404鈥C145405鈥C145408

1

MC145404,MC145405,MC145408

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