Motorola MC145408P, MC145403DW, MC145403P, MC145404P, MC145405DW Datasheet

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Order this document by MC145403/D

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

MC145403

MC145404

MC145405

MC145408

		P SUFFIX
		PLASTIC DIP
	20	CASE 738
	1
		P SUFFIX
		PLASTIC DIP
	24	CASE 724
	1
		DW SUFFIX
	20	SOG PACKAGE
		CASE 751D
	1
		DW SUFFIX
	24	SOG PACKAGE
		CASE 751E
	1
		SD SUFFIX
		SSOP
	20	CASE 940B
	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

REV 2

1/97 TN97010600

Motorola, Inc. 1997	MC145403•MC145404•MC145405•MC145408
MOTOROLA

1

PIN ASSIGNMENTS (DIP, SOG, AND SSOP)

MC145403

MC145404

MC145405

MC145408

3 DRIVERS/5 RECEIVERS

4 DRIVERS/4 RECEIVERS

5 DRIVERS/3 RECEIVERS

5 DRIVERS/5 RECEIVERS

V

1

20

V

V

1

20

V

V

1

20

V

V

1

24

V

DD

2

R

19

CC

DD

2

R

19

CC

DD

2

R

19

CC

DD

2

R

23

CC

Rx1

DO1

Rx1

DO1

Rx1

DO1

Rx1

DO1

3

18

3

18

3

D

18

3

D

22

Tx1

D

DI1

Tx1

D

DI1

Tx1

DI1

Tx1

DI1

4

R

17

4

R

17

4

17

4

R

21

Rx2

DO2

Rx2

DO2

Tx2

D

DI2

Rx2

DO2

Rx3

5

R

16

DO3

Tx2

5

D

16

DI3

Rx2

5

R

16

DO2

Tx2

5

D

20

DI2

Tx2

6

D

15

DI2

Rx3

6

R

15

DO3

Tx3

6

D

15

DI3

Rx3

6

R

19

DO3

7

R

14

7

14

7

14

7

D

18

Rx4

DO4

Tx3

D

DI3

Tx4

D

DI4

Tx3

DI3

8

13

8

13

8

13

8

R

17

Rx5

R

DO5

Rx4

R

DO4

Rx3

R

DO3

Rx4

DO4

Tx3

9

D

12

DI3

Tx4

9

D

12

DI4

Tx5

9

D

12

DI5

Tx4

9

D

16

DI4

VSS

10

11

GND

VSS

10

11

GND

VSS

10

11

GND

Rx5

10

R

15

DO5

11

D

14

Tx5

DI5

V

12

13

GND

SS

		FUNCTIONAL DIAGRAM
	RECEIVER	DRIVER
	V	VCC
ESD	DD
PROTECTION

15 kΩ	VCC		VDD	VCC
	+
Rx		300 Ω		++
	DO		LEVEL		DI
5.4 kΩ	±	Tx	SHIFT	±±
	VSS		VSS		1.4 V
	1.0 V
	1.8 V

MC145403•MC145404•MC145405•MC145408	MOTOROLA
2

ABSOLUTE MAXIMUM RATINGS

(Voltages referenced to GND, except where noted)

Rating	Symbol	Value		Unit
DC Supply Voltage (VDD ≥ VCC)	VDD	± 0.5 to +	13.5	V
	VSS	+ 0.5 to ±	13.5
	VCC	± 0.5 to + 6.0
Input Voltage Range	VIR			V
Rx1 ± Rxn		VSS ± 15 to VDD + 15
DI1 ± DIn		0.5 to VCC + 15
DC Current Drain per Pin	I	± 00		mA
Power Dissipation	PD	1		W
Operating Temperature Range	TA	± 40 to + 85		°C
Storage Temperature Range	Tstg	± 85 to +	150	°C

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 impedance 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).

EIA±232 I/O: Driver Outputs (Tx):

(VSS ≤ VTx1 ± Txn ≤ VDD). Receiver Inputs (Rx):

VSS ± 15 V ≤ VRx1 ± Rxn ≤ VDD + 15 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).

DC ELECTRICAL CHARACTERISTICS (All polarities referenced to GND = 0 V, TA = ± 40 to + 85°C)

Parameter	Symbol	Min	Typ	Max	Unit
DC Supply Voltage	VDD	4.5	5 to 12	13.2	V
	VSS	± 4.5	± 5 to ± 12	± 13.2
	VCC	4.5	5	5.5
Quiescent Supply Current (Outputs Unloaded, Inputs Low) VDD = + 12 V	IDD	Ð	425	635	μA
VSS = ± 12 V	ISS	Ð	± 400	± 600
VCC = + 5 V	ICC	Ð	110	200

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		Symbol	Min	Typ	Max	Unit
Input Turn±On Threshold	Rx1 ± Rxn	Von	1.35	1.8	2.35	V
VDO = VOL
Input Turn±Off Threshold	Rx1 ± Rxn	Voff	0.75	1	1.25	V
VDO = VOH
Input Threshold Hysteresis		Vhys	0.6	0.8	Ð	V
= Von ± Voff
Input Resistance		Rin	3	5.4	7	kΩ
(VSS ± 15 V) ≤ V Rx1 ± Rxn ≤ (VDD + 15 V)
High Level Output Voltage	Iout = ± 20 μA	VOH	4.9	4.9	Ð	V
VRx = ± 3 to ± 25 V* (DO1 ± DOn)	Iout = ± 1.0 mA		3.8	4.3	Ð
Low Level Output Voltage	Iout = + 2 mA	VOL	Ð	0.02	0.5	V
VRx = + 3 to + 25 V* (DO1 ± DOn)	Iout = + 4 mA		Ð	0.5	0.7

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

MOTOROLA

MC145403•MC145404•MC145405•MC145408

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