Datasheet MC145707DW, MC145705DW, MC145705P, MC145706DW, MC145706P Datasheet (Motorola)

MC145705•MC145706•MC145707MOTOROLA

1

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EIA–232–E and CCITT V.28

The MC145705/06/07 are a series of silicon–gate CMOS transceiver ICs that
fulfill the electrical specifications of EIA–232–E and CCITT V .28 while operating
from a s ingle + 5 V power supply. T hese t ransceiver series a re h igh
performance and low power consumption devices that are equipped with
standby and output enable function.

A voltage doubler and inverter c onvert t he + 5 V to ± 10 V. This i s
accomplished through an on–board 20 kHz oscillator and four inexpensive
external electrolytic capacitors.

The MC145705 is composed of t wo drivers and three r eceivers, t he
MC145706 has three drivers and two receivers, and the MC145707 has three
drivers and three receivers. These drivers and receivers are virtually identical to
those of the MC145407.

Available Driver/Receiver Combinations

Device Drivers Receivers No. of Pins

MC145705 2 3 20
MC145706 3 2 20
MC145707 3 3 24

Drivers:

• ± 7.5 Output Swing

• 300 Ω Power–Off Impedance

• Output Current Limiting

• TTL and CMOS Compatible Inputs

• Three–State Outputs During Standby Mode

• Hold Output OFF (MARK) State by TxEN Pin

Receivers:

• ± 25 V Input Range

• 3 to 7 kΩ Input Impedance

• 0.8 V Hysteresis for Enhanced Noise Immunity

• Three–State Outputs During Standby Mode

Charge Pumps:

• + 5 to ± 10 V Dual Charge Pump Architecture

• Supply Outputs Capable of Driving Three Drivers on the MC145403/06

Simultaneously

• Requires Four Inexpensive Electrolytic Capacitors

• On–Chip 20 kHz Oscillators

This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.

Order this document

by MC145705/D



SEMICONDUCTOR TECHNICAL DATA

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


P SUFFIX

PLASTIC DIP

CASE 738

ORDERING INFORMATION

MC145705P Plastic DIP
MC145706P Plastic DIP
MC145707P Plastic DIP

MC145705DW SOG Package
MC145706DW SOG Package
MC145707DW SOG Package

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

 Motorola, Inc. 1995

REV 1
8/95

MC145705•MC145706•MC145707 MOTOROLA
2

PIN ASSIGNMENTS

MC145706

3 DRIVERS/2 RECEIVERS

MC145705

2 DRIVERS/3 RECEIVERS

MC145707

3 DRIVERS/3 RECEIVERS

C2+

GND

C2–

V

SS

STB

Tx1

Rx1

Tx2

Rx2

Tx3

1

2

3
4

5
6

7
8

9
10

C1+

V

CC

C1–

V

DD

TxEN

DI1

DO1

DI2

DO2

DI3

20

19

18
17

16

15

14

13

12

11

1

2

3
4

5
6

7

8

9
10

20

19

18
17

16

15

14

13

12

11

C1+

V

CC

C1–

V

DD

TxEN

DO1

DO2

DI1

DO3

DI2

C2+

GND

C2–

V

SS

STB

Rx1

Rx2

Tx1

Rx3

Tx2

1

2

3
4

5

6
7

8

9
10

11
12

24

23

22

21
20

19
18

17

16

15

14
13

C2+

GND

C2–

V

SS

STB

NC

Rx1

Tx1

Rx2

Tx2

Rx3

Tx3

C1+

V

CC

C1–

V

DD

TxEN

NC

DO1

DI1

DO2

DI2

DO3

DI3

NC = NO CONNECTION

MC145705•MC145706•MC145707MOTOROLA

3

FUNCTION DIAGRAM

RECEIVER

DRIVER

TxEN

CHARGE PUMPS

OSC

VOLTAGE

DOUBLER

VOLTAGE

INVERTER

V

SS

V

DD

V

CC

GND

C1

C3 C4

C2

C1– C1+ C2+ C2–

+

+ +

+

–

+

V

DD

V

DD

V

SS

V

CC

STB

DO

1.0 V

1.8 V

15 k

Ω

5.4 k

Ω

*

*Protection Circuit

LEVEL

SHIFT

STB

V

CC

DI

1.4 V

–

+

V

CC

300

Ω

Tx

V

DD

V

SS

MC145705•MC145706•MC145707 MOTOROLA
4

MAXIMUM RATINGS (Voltage Polarities Referenced to GND)

Rating

Symbol Value Unit

DC Supply Voltage V

CC

– 0.5 to + 6.0 V

Input Voltage Rx1 – Rx3 Inputs

DI1 – DI3 Inputs

V

IR

VSS – 15 to VDD+ 15

0.5 to VCC+ 15

V

DC Current per Pin I ± 100 mA
Power Dissipation P

D

1 W

Operating Temperature Range T

A

– 40 to + 85 °C

Storage Temperature Range T

stg

– 85 to + 150 °C

RECOMMENDED OPERATING LIMITS

Parameter Symbol Min Typ Max Unit

Power Supply V

CC

4.5 5 5.5 V

Operating Temperature Range T

A

– 40 — 85 °C

DC ELECTRICAL CHARACTERISTICS (Voltage polarities referenced to GND = 0 V; C1 – C4 = 10 µF; T

A

= – 40 to + 85°C)

Parameter

Symbol Min Typ Max Unit

DC Power Supply V

CC

4.5 5 5.5 V

Quiescent Supply Current (Output Unloaded, Input Low) I

CC

— 1.7 3.5 mA

Quiescent Supply Current (Standby Mode) (Output Unloaded, Input Open) I

CC(STB)

— < 10 20 µA

Control Signal Input Voltage (STB, TxEN) Logic Low

Logic High

V

IL

V

IH

—

VCC – 0.5

—
—

0.5
—

V

Control Signal Input Current Logic Low (TxEN)

Logic High (STB)

I

IL

I

IH

—
—

—
—

– 10

10

µA

Charge Pumps Output Voltage (C1, C2, C3, C4 = 10 µF)

Output Voltage (VDD) I

load

= 0 mA

I

load

= 5 mA

I

load

= 10 mA

V

DD

8.5

7.5

6.0

10.0

9.5

9.0

11
—
—

V

Output Voltage (VSS) I

load

= 0 mA

I

load

= 5 mA

I

load

= 10 mA

V

SS

– 8.5
– 7.5
– 6.0

– 10.0

– 9.2
– 8.6

– 11

—
—

RECEIVER ELECTRICAL SPECIFICATIONS

(Voltage polarities referenced to GND = 0 V; VCC = + 5 V ± 10%; C1 – C4 = 10 µF; TA = – 40 to + 85°C)

Parameter

Symbol Min Typ Max Unit

Input Turn–On Threshold (V

DO1 – DO3

= VOL) Rx1 – Rx3 V

on

1.35 1.8 2.35 V

Input Turn–Off Threshold (V

DO1 – DO3

= VOH) Rx1 – Rx3 V

off

0.75 1 1.25 V

Input Threshold Hysteresis (Von = V

off

) Rx1 – Rx3 V

hys

0.6 0.8 — V

Input Resistance R

in

3 5.4 7 kΩ

High–Level Output Voltage (DO1 – DO3) I

out

= – 20 µA

V

Rx1 – Rx3

= – 3 to – 25 V I

out

= – 1 mA

V

OH

VCC – 0.1
VCC – 0.7

—

4.3

—
—

V

Low–Level Output Voltage (DO1 – DO3) I

out

= + 20 µA

V

Rx1 – Rx3

= + 3 to + 25 V I

out

= + 1.6 mA

V

OL

—
—

0.01

0.5

0.1

0.7

V

This device contains protection circuitry to
guard against damage due to high static
voltages or electric fields. However, precau­tions must 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 the voltage at
the DI and DO pins be constrained to the range
GND ≤ VDI ≤ VDD and GND ≤ VDO ≤ VCC.
Also, the voltage at the Rx pin should be
constrained to (VSS – 15 V) ≤ V

Rx1 – Rx3

≤
(VDD + 15 V), and Tx should be constrained
to VSS ≤ V

Tx1 – Tx3

≤ VDD.

Unused inputs must always be tied to an
appropriate logic voltage level (e.g., GND or
VCC for DI, and GND for Rx).

MC145705•MC145706•MC145707MOTOROLA

5

DRIVER ELECTRICAL SPECIFICATIONS

(Voltage polarities referenced to GND = 0 V; VCC = + 5 V ± 10%; C1 – C4 = 10 µF; TA = – 40 to + 85°C)

Parameter

Symbol Min Typ Max Unit

Digital Input Voltage DI1 – DI3

Logic Low
Logic High

V

IL

V

IH

—

2

—
—

0.8
—

V

Input Current DI1 – DI3

VDI = GND
VDI = V

CC

I

IL

I

IH

—
—

7

—

—

± 1.0

µA

Output High Voltage Tx1 – Tx3

(V

DI1 – DI3

= Logic Low, RL = 3 kΩ) Tx1 – Tx6*

V

OH

6
5

7.5

6.5

—
—

V

Output Low Voltage Tx1 – Tx3

(V

DI1 – DI3

= Logic High, RL = 3 kΩ) Tx1 – Tx6*

V

OL

– 6
– 5

– 7.5
– 6.5

—
—

V

Off Source Impedance Tx1 – Tx3 Z

off

300 — — Ω

Output Short Circuit Current (VCC = 5.5 V)

Tx1 – Tx3 Shorted to GND**
Tx1 – Tx3 Shorted to ± 15 V***

I

SC

—
—

—
—

± 60

± 100

mA

*Specifications for a MC14570X powering a MC145406 or MC145403 with three additional drivers/receivers.

**Specification is for one Tx output to be shorted at a time. Should all three driver outputs be shorted simultaneously , device power dissipation

limits could be exceeded.

***This condition could exceed package limitations.

SWITCHING CHARACTERISTICS (V

CC

= + 5 V, ± 10%; C1 – C4 = 10 µF; TA = – 40 to + 85°C)

Parameter

Symbol Min Typ Max Unit

Drivers

Propagation Delay Time Tx1 – Tx3

Low–to–High

(RL = 3 kΩ, CL = 50 pF or 2500 pF)

t

PLH

— 0.5 1

µs

High–to–Low

(RL = 3 kΩ, CL = 50 pF or 2500 pF)

t

PHL

— 0.5 1

Output Slew Rate Tx1 – Tx3

Minimum Load (RL = 7 kΩ, CL = 0 pF)

SR

— ± 6 ± 30

V/µs

Maximum Load (RL = 3 kΩ, CL = 2500 pF) — ± 5 —

Output Disable Time t

DAZ

— 4 10 µs

Output Enable Time t

DZA

— 25 50 ms

Receivers

Propagation Delay Time DO1 – DO3

Low–to–High

t

PLH

— — 1

µs

High–to–Low t

PHL

— — 1

Output Rise Time DO1 – DO3 t

r

— 250 400 ns

Output Fall Time DO1 – DO3 t

f

— 40 100 ns

Output Disable Time t

RAZ

— 4 10 µs

Output Enable Time t

RZA

— 25 50 ms

TRUTH TABLE
Drivers

DI TxEN STB Tx

X X H Z*
X L L L
H H L L
L H L H

*VSS ≤ VTx ≤ V

DD

X = Don’t Care

Receivers

Rx STB DO

X H Z*
H L L
L L H

*GND ≤ VDO ≤ V

CC

X = Don’t Care

MC145705•MC145706•MC145707 MOTOROLA
6

PIN DESCRIPTIONS

V

CC

Digital Power Supply

This digital supply pin is connected to the logic power sup-

ply. This pin should have a 0.33 µF capacitor to ground.

GND
Ground

Ground return pin is typically connected t o the signal
ground pin of the EIA–232–D connector (Pin 7) as well as to
the logic power supply ground.

V

DD

Positive Power Supply

This is the positive output of the on–chip voltage doubler
and the positive power supply input of the driver/receiver
sections of the device. This pin requires an external storage
capacitor to filter the 50% duty cycle voltage generated by
the charge pump.

V

SS

Negative Power Supply

This is the negative output of the on–chip voltage doubler/
inverter and the negative power supply input of the driver/
receiver sections of the device. This pin requires an external
storage capacitor to filter the 50% duty cycle voltage gener­ated by the charge pump.

TxEN
Output Enable

This is the driver output enable pin. When this pin is in
logic low level, the condition of the driver outputs (Tx1 – Tx3)
are in keep OFF (mark

) state.

STB
Standby

The device enters the standby mode while this pin is con­nected to the logic high level. During the standby mode,
driver and receiver output pins become high impedance

state. In this condition, supply current ICC is below 10 µA
(Typ) and can be operated with low current consumption.

C2+, C2–, C1+, C1–
Voltage Doubler and Inverter

These are the connections to the internal voltage doubler

and inverter, which generate the VDD and VSS voltages.

Rx1, Rx2 (Rx3)
Receive Data Input

These are the EIA–232–E receive signal inputs. A voltage
between + 3 and + 25 V is decoded as a space, and causes
the corresponding DO pin to swing to ground (0 V). A voltage
between – 3 and – 25 V is decoded as a mark, and causes
the DO pin to swing up to VCC.

DO1, DO2 (DO3)
Data Output

These are the receiver digital output pins, which swing
from VCC to GND. Each output pin is capable of driving one
LSTTL input load.

Output level of these p ins is high impedance while in
standby mode.

DI1, DI2 (DI3)
Data Input

These are t he high impedance digital input pins to the
drivers. Input voltage levels on these pins must be between
VCC and GND.

The level of these input pins are TTL/CMOS compatible.

Tx1, Tx2 (Tx3)
Transmit Data Output

These are the EIA–232–E transmit signal output pins,
which swing toward VDD and VSS. A logic 1 at a DI input
causes the corresponding Tx output to swing toward VSS.
The actual levels and slew rate achieved will depend on the
output loading (RL/CL).

The minimum output impedance is 300 Ω when turned off.

SWITCHING CHARACTERISTICS

RECEIVER

DRIVER

50%

DI1 – DI3

(INPUT)

+ 3 V

0 V

t

f

10%

90%

t

r

t

PHL

t

PLH

V

OL

V

OH

Tx1 – Tx3

(OUTPUT

)

50%

Rx1 – Rx3

(INPUT)

+ 3 V

0 V

t

f

10%

90%

t

r

t

PHL

t

PLH

V

OL

V

OH

DO1 – DO3

(OUTPUT)

STB (INPUT)

Tx1 – Rx3

(OUTPUT)

RECEIVER

DRIVER

+ 5 V

0 V

V

OL

V

OH

+ 1.5 V + 1.5 V

+ 5 V

+ 5 V

– 5 V– 5 V

t

DAZ

t

DZA

STB (INPUT)

DO1 – DO3

(OUTPUT)

+ 5 V

0 V

V

OL

V

OH

+ 1.5 V + 1.5 V

90% 90%

10%10%

t

RAZ

t

RZA

HIGH Z

HIGH Z

MC145705•MC145706•MC145707MOTOROLA

7

ESD PROTECTION

ESD protection on IC devices that have their pins accessi­ble to the outside world is essential. High static voltages ap­plied to the pins when someone touches them either directly
or indirectly can cause damage to gate oxides and transistor
junctions by coupling a portion of the energy from the I/O pin
to the power supply buses of the IC. This coupling will usually

occur through the internal ESD protection diodes which are
designed to do just that. The key to protecting the IC is to
shunt as much of the energy to ground as possible before it
enters the IC. The figure below shows a technique which will
clamp the ESD voltage at approximately ± 15 V using the
MMBZ15VDLT1. Any residual voltage which appears on the
supply pins is shunted to ground through the capacitors C1
and C2.

1

2

3
4

5

6
7

8

9
10

11
12

24

23

22

21
20

19
18

17

16

15

14
13

C2+

GND

C2–

V

SS

STB

NC

Rx1

Tx1

Rx2

Tx2

Rx3

Tx3

C1+

MMBZ15VDLT1

0.1 µF

C1–

V

DD

TxEN

NC

DO1

DI1

DO2

DI2

DO3

DI3

V

CC

MC145705•MC145706•MC145707 MOTOROLA
8

PACKAGE DIMENSIONS

P SUFFIX
PLASTIC DIP
CASE 738–03

1.070

0.260

0.180

0.022

0.070

0.015

0.140
15

°

0.040

1.010

0.240

0.150

0.015

0.050

0.008

0.110
0°

0.020

25.66

6.10

3.81

0.39

1.27

0.21

2.80
0°

0.51

27.17

6.60

4.57

0.55

1.77

0.38

3.55
15

°

1.01

0.050 BSC

0.100 BSC

0.300 BSC

1.27 BSC

2.54 BSC

7.62 BSC

MIN MINMAX MAX

INCHES MILLIMETERS

DIM

A
B
C
D
E
F
G

J
K
L
M
N

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.

4. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.

-A-

C

K

N

E

G F

D

20 PL

J 20 PL

L

M

-T-

SEATING
PLANE

1 10

1120

0.25 (0.010) T A

M M

0.25 (0.010) T B

M M

B

DW SUFFIX

SOG PACKAGE

CASE 751D–04

NOTES:

1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.150
(0.006) PER SIDE.

5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D DIMENSION
AT MAXIMUM MATERIAL CONDITION.

–A–

–B–

20

1

11

10

S

A

M

0.010 (0.25) B

S

T

D20X

M

B

M

0.010 (0.25)

P10X

J

F

G

18X

K

C

–T–

SEATING
PLANE

M

R

X 45

_

DIM MIN MAX MIN MAX

INCHESMILLIMETERS

A 12.65 12.95 0.499 0.510
B 7.40 7.60 0.292 0.299
C 2.35 2.65 0.093 0.104
D 0.35 0.49 0.014 0.019
F 0.50 0.90 0.020 0.035
G 1.27 BSC 0.050 BSC
J 0.25 0.32 0.010 0.012
K 0.10 0.25 0.004 0.009
M 0 7 0 7
P 10.05 10.55 0.395 0.415
R 0.25 0.75 0.010 0.029

_ _

_ _

MC145705•MC145706•MC145707MOTOROLA

9

P SUFFIX

PLASTIC DIP

CASE 724–03

NOTES:

1. CHAMFERED CONTOUR OPTIONAL.

2. DIMENSION L TO CENTER OF LEADS WHEN

FORMED PARALLEL.

3. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

4. CONTROLLING DIMENSION: INCH.

–A–

–B–

24 13

12

1

–T–

SEATING
PLANE

24 PL

K

E

F

N

C

D

G

M

A

M

0.25 (0.010) T

24 PLJ

M

B

M

0.25 (0.010) T

L

M

NOTE 1

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 1.230 1.265 31.25 32.13
B 0.250 0.270 6.35 6.85
C 0.145 0.175 3.69 4.44
D 0.015 0.020 0.38 0.51
E 0.050 BSC 1.27 BSC
F 0.040 0.060 1.02 1.52
G 0.100 BSC 2.54 BSC
J 0.007 0.012 0.18 0.30
K 0.110 0.140 2.80 3.55

L 0.300 BSC 7.62 BSC
M 0 15 0 15
N 0.020 0.040 0.51 1.01

_ _ _ _

DW SUFFIX

SOG PACKAGE

CASE 751E–04

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.

5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN
EXCESS OF D DIMENSION AT MAXIMUM
MATERIAL CONDITION.

–A–

–B– P12X

D24X

12

1324

1

M

0.010 (0.25) B

M

S

A

M

0.010 (0.25) B

S

T

–T–

G

22X

SEATING
PLANE

K

C

R

X 45

_

M

F

J

DIM MIN MAX MIN MAX

INCHESMILLIMETERS

A 15.25 15.54 0.601 0.612
B 7.40 7.60 0.292 0.299
C 2.35 2.65 0.093 0.104
D 0.35 0.49 0.014 0.019
F 0.41 0.90 0.016 0.035
G 1.27 BSC 0.050 BSC
J 0.23 0.32 0.009 0.013
K 0.13 0.29 0.005 0.011
M 0 8 0 8
P 10.05 10.55 0.395 0.415
R 0.25 0.75 0.010 0.029

____

MC145705•MC145706•MC145707 MOTOROLA
10

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MC145705•MC145706•MC145707MOTOROLA

11

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MC145705•MC145706•MC145707 MOTOROLA
12

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USA/EUROPE: Motorola Literature Distribution; JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,

P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315

MFAX: [e-mail] – TOUCHTONE (602) 244–6609 HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
INTERNET: http://Design–NET.com 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298

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