Datasheet MSA4709ASS Datasheet (OKI)

E2A0032-16-X0

¡ Semiconductor MSA4709A

¡ Semiconductor

This version: Jan. 1998

Previous version: Nov. 1996

MSA4709A

Subscriber Line Interface Circuit

GENERAL DESCRIPTION

The MSA4709A is designed to provide BSH functions and to meet PABX transmission performance
requirements.
This device provides two-wire to four-wire conversion function (Hybrid).

FEATURES

• B (Battery feed), S (Supervision), and H (Hybrid) functions integrated on chip.

• Design to meet Central Office and PABX quality transmission requirements.

• All transmission performance parameters can be externally programmable.

• Free from parasitic SCR's using dielectric isolation technology.

• Size and weight reduction over conventional approaches.

• Supply voltage selectable (V

• 1 channel built-in relay driver.

• Package:
30-pin plastic Shrink DIP (SDIP30-P-400-1.78) (Product name: MSA4709ASS)

= –24 V/–48 V).

BB

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¡ Semiconductor MSA4709A

2/11

BLOCK DIAGRAM

Ring Current

DET

Ring Current

Drive Amp.

Over Voltage

Protection

TIP Current

DET
TIP Current
Drive Amp.

Interface

Circuit

HYB

Loop & Fault

DET

RING TRIP

Relay Driver

TIP

RING

Z

t

Z

FR

Z

R

Z

b

4WR

ZR

BN

ZX

4WS

4WR

Z

X

VBS

BF

SCN SEL RG RB

V

EE

V

CC

RI

RSI

RSO

V

BB

or

V

EE

RY

CDC

CN

V

BB

NE

NB

A

B

PB

PE

G

CB IL

CDP

¡ Semiconductor MSA4709A

PIN CONFIGURATION (TOP VIEW)

30

29

28

27

26

25

24

NC

B

PE

PB

G

CB

ZX

V

BB

NE

NB

RSO

CN

RY

1

2

A

3

4

5

6

7

Note: NC: No connect pin

CDC

8

RSI

9

RB

10

RG

11

V

12

EE

13

4WR

14

BN

15 16

ZR

30-Pin Plastic Shrink DIP

23

22

21

20

19

18

17

V

CC

RI

BF

VBS

IL

CDP

SEL

SCN

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¡ Semiconductor MSA4709A

PIN DESCRIPTION

Pin No. Name Description

1VBBBattery supply, –48 V or –24 V input.

2A

3NE

4 NB The base drive output for the NPN Darlington transistor.

5 RSO Relay driver current sink terminal.

6 CN Battery noise rejection capacitor input. This capacitor value is 1 mF (60V).

7 RY AC performance adjusting resistor RY input.

8 CDC

9 RSI Relay driver current source terminal.

10 RB Ring-Trip filtering capacitor input (RING).

11 RG Ring-Trip filtering capacitor input (TIP).

12 V

13 4WR

14 BN Balancing network drive output.

15 ZR Receive gain adjust and frequency compensation input.

EE

The Ring voltage sensing input. This input is high impedance (apr. 37 kW), and is
connected to the built-in over voltage protection circuit.

The Ring current sensing input is connected to the emitter of NPN Darlington transistor
and the power resistor REA.

AC high impedance providing capacitor Cdc input and constant current feed at the short
line adjusting zener diode input. This capacitor value is 1 mF (15V).

–5 V input.

Receive input and is connected to the negative input of the built-in buffer operational
amplifier.

Output of both the fault current detector and loop current detector. This output is open­collector with a built-in pull-up resistor. (apr. 10 kW).

16 SCN

Condition SEL = "H" SEL = "L"

• ON-Hook H H

• OFF-Hook L H

• Dial pulse: break H H

• Dial pulse: make L H

• RING TRIP L H

• Ground/Battery fault L L

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¡ Semiconductor MSA4709A

Pin No. Name Description

17 SEL

18 CDP Dial pulse shaping capacitor input.

19 IL Tip to Ring constant loop current determination resistor input.

20 VBS

21 BF

22 RI Relay driver control input. RI = "H" is Driver "ON"

23 V

CC

24 ZX

25 CB

26 G Ground input.

27 PB The base drive output for the PNP Darlington power transistor.

28 PE

29 B

30 NC No connection

SCN output information select control input. At SEL = "L", SCN Indicates only ground/
battery fault condition.

Supply voltage selection terminal.
V

= VCC (–24 V), VBS = G (–48 V).

BS

Battery-feed mode control input. A logic level "H" switches off both the Ring and Tip
current drive amp. and presents a high impedance to the line. (apr. 80 kW).

+5 V input

2 wire terminating impedance compornent Zx input. This pin has a low input
impedance.

Compensation capacitor input.
This capacitor value is 4700 pF(35V).

The Tip current sensing input is connected to the emitter of the PNP Darlington power
transister and the power resistor REB.

The Tip voltage sensing input. This input is high impedance (apr. 37 kW) and is
connected to the built-in over voltage protection circuit.

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¡ Semiconductor MSA4709A

ABSOLUTE MAXIMUM RATINGS

(Ta = 25°C)

Parameter Unit

Symbol Condition

VBS = G

V

BB

Power Supply Voltage

CC

EE

IN

RD

op

STG

VBS = V

— –0.3 to +7.0V

— –7.0 to +0.3V

— –0.3 to VCC + 0.3V

VRI = H –30I

— 0 to 80T

— –55 to 150T

RECOMMENDED OPERATING CONDITIONS

Parameter Max. Unit

Power Supply Voltage

Loop Resistance

Symbol Condition

VBS = G

V

BB

CC

EE

R

L

CC

CC

Rating

–53.0 to +0.3

–30.0 to +0.3

Typ.Min.

–53

–30VBS = V

–48 –43

–24 –21.6

+4.75— +5 +5.25V

–5.25— –5 –4.75V

0VBB = –48 V — 2000

0VBB = –24 V — 600

0——70TaOperating Ambient Temperature °C

V

VDigital Input Voltage

mARelay Driver Current

°COperating Temperature

°CStorage Temperature

V

W

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¡ Semiconductor MSA4709A

ELECTRICAL CHARACTERISTICS

DC Characteristics

(I

= 30 mA, VBB = –24/–48 V, VCC = 5 V, VEE = –5 V, Ta = 25°C)

L

Parameter Max. Unit

Power Supply Current

Power Dissipation

Loop Current mA

Symbol Condition

I

BB

CC

EE

BB

CC

EE

I

BB

CC

EE

BB

CC

EE

VBB = –24 V

ON-HOOK

V

= –24 V

BB

OFF-HOOK

V

= –48 V

BB

ON-HOOK

V

= –48 V

BB

OFF-HOOK

VBB = –24 V

ON-HOOK

V

= –24 V

BB

OFF-HOOK

V

= –48 V

BB

ON-HOOK

V

= –48 V

BB

OFF-HOOK

RSI-RSO

I

= 30 mARelay Driver Output Voltage V

RSI-RSO

—

— 4.0 6.0I

— 1 1.5I

—

— 5.4 8.1I

— 1.2 1.8I

—

— 4.0 6.0I

— 1 1.5I

—

— 6.1 9.2I

— 1.2 1.8I

— 70 100Pds24

— 130 200Pd24

— 100 150Pds48

— 280 420Pd48

26 30 34IL50 RL = 50 W

26 30 34IL400 RL = 400 W

———IL1K RL = 1 kW

–3 — 1.2V

Typ.Min.

1.7 2.6

mA

3.7 6.2I

1.5 2.3

mA

5.0 7.5I

mW

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¡ Semiconductor MSA4709A

AC Characteristics

( V

= –24/–48 V, VCC = 5 V, VEE = –5 V, Ta = 25°C )

BB

Parameter Max. Unit

Transmit &
Receive Gain

Insertion Loss
Variety

Idel Channel Noise

Signal to Distortion
Ratio

Longitudinal
Balance

AC Induction
Tolerance

Power Supply
Rejection Ratio

2WÆ4W

4WÆ2W

2WÆ4W

4WÆ2W

2W

4W

2WÆ4W

4WÆ2W

2W

4W

2WÆ4W

4WÆ2W
VBBÆ2W

VCCÆ2W

VEEÆ2W

VBBÆ4W

VCCÆ4W

VEEÆ4W

Symbol Condition

G

DL

SN

LB

NI

24

42

24

42

2

4

24

42

2W

4W

= 0 dBm0

V

i

f = 1 kHz

f = 0.3 to 3.4 kHz

Vi = –55 to +3 dBm0

Psohometric Filter

f = 1 kHz

Vi = 0 dBm0

f = 0.3 kHz to 3.4 kHz

f = 0.3 kHz to 3.4 kHz

f = 0.3 kHz to 3.4 kHz

I

AC24

AC42

2

2

2

4

4

4

= 12.8 mArms

I

AC

Vi = 0 dBm0

f = 0.3 kHz to 3.4 kHz

Vin = 24.5 mVrms

f = 0.3 kHz to 3.4 kHz

Vin = 24.5 mVrms

—

— –4.0 —G

–0.1

–0.1 — 0.1DL

—

— — –81NI

53

53 — —SN

40

40 — —LB

20

23

53

53 — —I
20 — —LB

20 — —LC

20 — —LE

20 — —LB

20 — —LC

20 — —LE

Typ.Min.

4.0 —

— 0.1

— –81

——

——

——LMReturn Loss dB

——LRTranshybrid Loss dB

——

dB

dB

dBm0P

dBP

dB

dB

P

dB

dB

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¡ Semiconductor MSA4709A

APPLICATION CIRCUIT

•VBB : –48 V

• Loop Current IL : 30 mA

• Equivalent Terminal Impedance : 600W + 1mF

TIP

RING

750W

(*3)

r

1

(*6)

r

1

750W

V

BB

510k

(*5)
51W

(*1)

(*1)

51W
(*5)

V

BB

(*2)

R1

V

V

BB

–

+

2.2k

2.2k

or V

BB

EE

(*4)

1m

RB VBSVCCVEEIL

G CDC

PE

PB

BBN

AZR

NB

NE

V

BB

RG

RSI

RSO

RI BF SEL SCN

+5V –5V

MSA4709A

(Controller)

27k

RY

ZX

4WR

CDP

CB

CN

1m

–+

4.7k

0.028m

0.028m

2.7k

1m

–+

1m

21k

42k

V

BB

187k

12k

4700pF

GSX

AIN–

AIN+

MSM6999

AOUT+

CODEC

PCM

OUT

PCM

FHW

IN

BHW

750

V

CC

R1

RSI

RSO

RI

TIP

RING

r

1

750W

V

Fig. 1 Fig. 2

BB

510k

+

1m

–

RG

RB

V

BB

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¡ Semiconductor MSA4709A

Notes: *1. Use heat sinks required for Darlinton-connected power transistors.

*2. This diagram indicates that VBB or VEE (negative supply) is used for driving the

relay, but a positive supply, such as VEE indicated in Fig. 2, can also be used.

*3. This diagram indicates that the ring trip circuit consists of the RING line connected

to ground through the riging current source and the TIP line connected to the
battery (VBB), but the ring trip circuit can also be configured, using the RG pin
indicated in Fig. 2, by the RING line connected to the battery through the ringing
current source and the TIP line connected to ground.

*4. This diagram indicates VBB=–48V. If –24V is used for VBB, connect the VBS pin to

VCC and change the ring trip filtering constants from 510 kW plus 1 mF to 150 kW plus

33 mF.
*5. Use a resistor with precision of 0.1% or better.
*6. Connect additional circuits for suppressing or absorbing surge and noise caued by

relay contacts.

Battery Feed Characteristics

40

30

(mA)

L

IL = 30 mA

20

Loop Current I

10

0

= –48V

V

BB

= 40 mA

I

L

12

Loop Resistance RL (kW)

40

30

(mA)

L

20

Loop Current I

10

0

Loop Resistance RL (kW)

V

= –24V

BB

10.5 1.5

10/11

¡ Semiconductor MSA4709A

PACKAGE DIMENSIONS

(Unit : mm)

SDIP30-P-400-1.78

Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)

Epoxy resin
42 alloy
Solder plating
5 mm or more

1.80 TYP.

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