Datasheet STV1389AQ Datasheet (SGS Thomson Microelectronics)

CABLE DRIVER FOR DIGITAL TRANSFER

.

1 DIFFERENTIAL INPUT, 3 DIFFERENTIAL
OUTPUTS

.

SUFFICIENT DRIVE CAPABILITY FOR A
300mLENGTH COAXIALCABLE

.

STABILITY DUE TO MINIMAL WAVEFORM
DISTORTION

.

BIPOLARSILICON MONOLITHICIC

APPLICATIONS

.

DATA TRANSFER BETWEEN DIGITAL SIG­NALPROCESSINGEQUIPMENT

DESCRIPTION

The STV1389AQoffersin asingle-chipacomplete
IC driver for digital data transfer.

STV1389AQ

QFP32

(Plastic Package)

ORDER CODE : STV1389AQ

PINCONNECTIONS

3A

N.C.

24 1718192023 2122

GND6

25

GND7

26

3B

27

28

N.C.

GND

29

GND

30

31

N.C. N.C.

1A

32

1 2345678

GND2

GND

1B

GND3

GND

GND

2B

GND

N.C.

GND

GND5

INY

GND4

16

15

14

13

12

11

10

9

N.C.

2A

N.C.

VEE

VEE

VEE

VEE

INX

1389-01.EPS

November 1992

1/7

STV1389AQ

PIN DESCRIPTION

Pin

Number

Symbol

Standard

DC

Voltage

Equivalent Circuit Description

GND

180

7

Ω

1mA

2kΩ

17
18
25
26

32
16

20
23
27

7
9

1
2

INY
INX

GND2
GND3
GND4
GND5

- 2.7V

-

2kΩ

9

GND

VEE

1k

180 Ω

Ω

1mA

GND6
GND7

1A

3

1B
2A
2B

- 2.7V

1mA

3A
3B

VEE

Input pin of the differential
amplifier. Input executed after DC
portion is cut off.

1389-02.EPS

Collector of the emitter follower

1

output Tr.
Connect to GND.

2
17
18
25
26

32

Emitter of emitter follower output

3

Tr.

16

To use, connect pull-down

20

resistor. (Even when only 1 side is
used pull-down is executed In

23

pairs.)

27

Pairs 32 16 23

32027

2/7

1389-03.EPS

1389-01.TBL

BLOCK DIAGRAM

N.C. N.C.

24

25

GND6

26

GND7

27

3B

28

N.C.

29

GND

30

GND

3A GND GND 2B GND5 GND4

2122

1718192023

-5V

STV1389AQ

When the belowinput is applied
between INX and INY, in-phase

16

2A

15

N.C.

14

VEE

13

VEE

12

VEE

11

VEE

1.6Vp-p

1.6Vp-p is output at 1A, 2A and 3A.
In reversedphase, 1.6Vp-p is output
at 1B, 2B and 3B.

* Various output pins are connected
as indicatedbelow.

150

0.1µF

Ω

-5V

75

Co-axialcable

Ω

N.C.

31

32

1A

12345678

GND2 GND3 1B GND GND GND INY

BIAS
GEN

0.1µF

N.C.

0.6Vp-p

10

N.C.

9

INX

0.1µF

0.6Vp-p

ABSOLUTEMAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

T

stg

P

D

Supply Voltage 7.0 V
Storage Temperature - 65,+ 150
Allowable Power Dissipation 500 mW

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

CC

T

opr

Supply Voltage 4.8 to 5.2 V
Operating Temperature - 20, + 75

1389-04.EPS

o

C

1389-02.TBL

o

C

1389-03.TBL

ELECTRICAL CHARACTERISTICS

Symbol Parameter

Bias Conditions

V INY V INX

V1 Pin Voltage INY - - - Pin 7

V2 Pin Voltage INX - - - PIn 9 - 2.9 - 2.7 - 2.5 V
A1-1 PIn Voltage 1A - - - Pin 32 - 3.1 - 2.7 - 2.5 V
B1-1 PinVoltage 1B - - - Pin 3 - 3.1 - 2.7 - 2.5 V
A2-1 PIn Voltage 2A - - - Pin 16 - 3.1 - 2.7 - 2.5 V
B2-1 PinVoltage 2B - - - Pin 3 - 3.1 - 2.7 - 2.5 V

SWONTest

Point

Test Min. Typ. Max. Unit

- 2.9 - 2.7 - 2.5 V

Test of pin voltage

1389-04.TBL

3/7

STV1389AQ

ELECTRICALCHARACTERISTICS (TA=25oC)

Symbol Parameter

A3-1 PIn Voltage 3A - - - Pin 23
B3-1 Pin Voltage 3B - - - Pin 27 - 3.1 - 2.7 - 2.5 V

IEE Current Power

Supply
A1-2 DC applied1A V1 + 0.2 V2 - 0.2
B1-2 DC applied1B ↓↓ Pin 3 -

A2-2 DC applied2A ↓↓ Pin 16 0.31 0.39 0.47 V
B2-2 DC applied2B ↓↓ Pin 20 -

A3-2 DC applied3A ↓↓ Pin 23 0.31 0.39 0.47 V
B3-2 DC applied3B ↓↓ Pin 27 -

V1-1 Amplitude

1A + 1B
V2-1 Amplitude

2A + 2B
V3-1 Amplitude

3A + 3B

- Amplitude
1A/1B

- Amplitude
2A/2B

- Amplitude
3A/3B

A1-3 DC applied1A’ V1 - 0.4 V1 + 0.4

B1-3 DC applied1B’ ↓↓ Pin 3 0.6 0.75 0.9 V
A2-3 DC applied2A’ ↓↓ Pin 16 -0.9 -

B2-3 DC applied2B’ ↓↓ Pin 20 0.6 0.75 0.9 V
A3-3 DC applied3A’ ↓↓ Pin 23 -0.9 -

B3-3 DC applied3B’ ↓↓ Pin 27 0.6 0.75 0.9 V
V1-2 Amplitud’e

1A’ + 1B

V2-2 Amplitude

2A’ + 2B’

V3-2 Amplitude

3A’ + 3B’

- Amplitude
1A’ + 1B’

- Amplitude
2A’ + 2B’

- Amplitude
3A’ + 3B’

V1-3 Linearity 1 Calculation (V1-2) / (V1-1) 1.7 1.9 2.1 V
V2-3 Linearity 2 Calculation (V2-2) / (V1-1) 1.7 1.9 2.1 V
V3-3 Linearity 3 Calculation (V3-2) / (V1-1) 1.7 1.9 2.1 V

Bias Conditions

V INY V INX

- - - VEE Current power supplyat

Calculation

Calculation 0.65 0.75 0.85 V

Calculation 0.65 0.75 0.85 V

Calculation

Calculation 0.85 1.0 1.15 -

Calculation 0.85 1.0 1.15 -

Calculation

Calculation 1.3 1.5 1.7 V

Calculation 1.3 1.5 1.7 V

Calculation (A1-3) / (B1-3) 0.85 1.0 1.15 V

Calculation (A2-3) / (B2-3) 0.85 1.0 1.15 V

Calculation (A3-3) / (B3-3) 0.85 1.0 1.15 V

SWONTest

Point

Pin 32

SW1
SW2

Pin 32

SW1
SW2

Test Min. Typ. Max. Unit

Test of pin voltage

VEE
Output DC voltage is

tested when +0.2V is
applied to INY and - 0.2V
to INX.
(A1-2) = Test value - (A1-1)
(B1-2) = Test value - (B1-1)
The difference with the
previous pin voltage is
recorded. Same for A2-2,
B2-2, A3-2, B3-2

(V1-1) = (A1-2) - (B1-2)
Amplitude calculated from
T10 with T15 as base,
same for V2-1, V3-1.

(A1-2) / (B1-2)

Output DC voltage is
tested when - 0.4V is
applied to INY and + 0.4V
to INX.
(A1-3) = Test value - (A1-1)
(B1-3) = Test value - (B1-1)
The difference with the
previous pin voltage is
recorded. Same for A2-3,
B2-3, A3-3, B3-3

(V1-2) = (A1-3) + (B1-3)
Amplitude calculated from
T22 with T27 as base,
same for V2-2, V3-2.

- 3.1 - 2.7 - 2.5 V

- 143 - 77 mA

0.31 0.39 0.47 V

0.47-0.39-0.31

0.47-0.39-0.31

0.47-0.39-0.31

0.65 0.75 0.85 V

0.85 1.0 1.15 -

- 0.9 -

1.3 1.5 1.7 V

- 0.6 V

0.75

- 0.6 V

0.75

- 0.6 V

0.75

V

V

V

1389-05.TBL

4/7

TEST CIRCUIT

STV1389AQ

150Ω 150Ω

150Ω

150Ω

24

25

26

27

28

29

30

31

1A

32

3A 2B

3B

12345678

1B

150Ω

2122

BIAS
GEN

DESCRIPTION OF OPERATION

The STV1389AQconsistsof 3differentialamplifier
with a common input and a bias generator, and
three differentialoutputs. Each amplifiers provides
a 6dBgainand isconfiguredas adifferentialoutput
feeding the bases of a pair of current boosting
on-chipemitter followertransistors.Thedifferential
input pinsare internallybiasedand theinputsignal
isac-coupled to removethe D.C. component.
Between the output pins of each differentialampli­fier and the coaxial cable, an R-C network is con-

1718192023

150Ω

16

2A

15

INY A

SW1

V INY

-5V

INX B

14

13

12

11

10

9

SW2

-5V
VEE

V INX

nected to removeD.C. componentfrom the output
and for impedance matching. The series resistor
has a value of 68 to 75Ω to match a 75Ω coaxial
cable. In this manner a signalalmost identitical in
level to theinputsignal istransferredto thecoaxial
cable.

Optimum PCB layout and matchingresistor value
arechosentoobtaingoodeye patterndesignatthe
input pins. This is necessary because the wave­form distortion at the input pins is directly trans­ferred to theoutput waveform.

1389-05.EPS

Signal
source =

0.8Vpp

Matchingresistor

DC cut

0.6V

0.1µF

0.1µF

STV1389AQ

BIAS
GEN

To theother2 channels

6dB
Differential
amplifier

DC cut

150Ω

150

Matchingresistor

75

0.1µF

Ω

75

Ω

75

1.5V

Ω

Co-axialcable

75

Ω

1389-06.EPS

-5V

0.1µF

Ω

75 Ω

0.1µF

5/7

STV1389AQ

TEST CIRCUIT

Ω

Exampleof output waveform

Signalrate270Mbps75 for terminatingpin

STV1601A
3

V = 200mV/div

H = 1ns/div

Keepunusedoutputpins(bothcollectoranemitter)open.

Even when only one output side is in use, connect both

thepull-downresistanceandthecollector.

Ω

-5V

10

BIAS

GEN

*R1 10

0.1µF

9

INX B

1B

10/ 16V

Tantalum

capacitor

0.1µF

15

16

2A

17

18

19

20

21

22

14

-5V

Top View

STV1389AQ

12

13

11

SerialEncoder
4

Ω

ΩΩ220 220

*R2 10

Ω

*R3

150

INY A

5678

4

3

-5V

0.1 µF

Keep the GND pinpatternas short as possible and providesufficient GND.

A weak GND will cause unstableoperation

Sincepower consumptionis large, conceive a patterntakingdueconsideration

The marked* resistor is altered throughthe PCB pattern.

Adjustmentisperformedtoobtaina goodeye patternat Pins7 and 9.

-5V

150Ω

of the radiationfromthe PCB.

6/7

3A 2B

23

3B

24

29

25

26

27

28

Same as Block A Same as Block A

30

1A

31

2

1

32

0.1µF

Ω

75

Ω

0.1µF

150

0.1µF

Ω

75

BlockA

1389-07.EPS

PACKAGEMECHANICAL DATA

32 PINS- PLASTICQUADFLAT PACK

Dimensions in mm

0.2

9.0

0.3

0.1

7.0

24 17

1.5

0.35

0.15

STV1389AQ

0.15

25

32

16

8.0

0.2

9

1

0.15

0.10

0.30.8

8

0.12

M

0.127

0.1

0.05

0.1

0.1

0.50

0° -10°

PM-QFP32.EPS

Information furnished is believed tobe accurate and reliable. However,SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of suchinformation nor forany infringement of patents or other rights of third parties which may result
from its use. No licence isgranted by implication or otherwiseunder anypatent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for useas critical componentsin life
support devices or systems withoutexpress written approval of SGS-THOMSON Microelectronics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

Purchase of I

2

I

C Patent. Rights to usethese components in a I2C system,is granted provided that the system conforms to

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2

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7/7