Datasheet MSM7510GS-K, MSM7510RS Datasheet (OKI)

E2A0013-16-X1

Semiconductor MSM7510

¡ Semiconductor

This version: Jan. 1998

Previous version: Nov. 1996

MSM7510

300 bps Full Duplex FSK Modem – ITU-T V.21

GENERAL DESCRIPTION

The MSM7510 is useful for the ITU-T V.21 modem, for examples, low cost built-in modems,
telecontrol systems, home security systems, etc.
The family version, MSM7512B for ITU-T V.23, will be available following this device.
Oki has been mass-producing and delivering the MSM6926 and 6927 for a long time, but these
devices need two power supplies, +5 V for digital and +12 V for analog.
New generation devices, MSM7510/7512B, work with single rail +3 V to +5 V and low power

consumption.

FEATURES

• Conforms to ITU-T V.21, 300 bps Full Duplex

• ITU-T V.25 Answer Tone (2100 Hz) with Generator/Detector

• Single Power Supply : +3 V to +5 V

• Low Power Consumption
Operating Mode: 25 mW Typ.
Power Down Mode : 0.1 mW Max.

• Line Hybrid Circuit on Chip (direct drive capability of 600W)

• ALB (Analog–Loop back) with test mode.

• 3.579545 MHz Crystal Oscillator

• Digital Interface: TTL

• Package options:
16-pin plastic DIP (DIP16-P-300-2.45) (Product name: MSM7510RS)
24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name: MSM7510GS-K)

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Semiconductor MSM7510

BLOCK DIAGRAM

AI

(2)

AO
(3)

EAI

(4)

X1
(6)

X2
(7)

CLK

(8)

V

DD

(1)

GND

(5)

*R1

OSC

+

–

*R1

*R2

*R2

–

+

CLK GEN.

SG GEN.

AOG

*R3

*R2

* R1 to R3 ≥ 50 kW

FSK & ANS

Bandpass

Filter

Demodulator

Modulator

CONT.

RD
(9)

CD

(10)

XD

(11)

RS

(12)

O/A

(13)

MOD1

(14)

MOD2

(15)

AOG

(16)

( ) : for MSM7510RS

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p

Semiconductor MSM7510

PIN CONFIGURATION (TOP VIEW)

1

V

DD

2

AI

3

AO

4

EAI

5

GND

6

X1

7

X2

8 9

CLK

16-Pin Plastic DIP

16

15

14

13

12

11

10

AOG

MOD2

MOD1

O/A

RS

XD

CD

RD

1

V

DD

2

NC

3

AI

4

NC

5

AO

6

EAI

7

GND

8

X1

9

NC

10

X2

11

NC

12 13

CLK

24-Pin Plastic SOP

NC: No connect

AOG

24

23

NC

MOD2

22

NC

21

20

MOD1

19

O/A

18

RS

17

XD

NC

16

CD

15

14

NC

RD

in

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Semiconductor MSM7510

PIN DESCRIPTION

No.

RS GS-VK

11 VDD— +3 V to +5 V Power Supply

2 3 AI I Analog receive signal input.

3 5 AO O Analog transmit signal output.

External analog signal input.

4 6 EAI I

5 7 GND — Ground, 0 V.

6 8 X1 I

710 X2 O

8 12 CLK O 3.579545 MHz clock signal output.

913 RD O

10 15 CD O

11 17 XD I*

12 18 RS I*

13 19 O/A I*

14 20 MOD1 I* Operation mode select.

15 22 MOD2 I*

16 24 AOG I*

The signal applied to this pin is transmitted from AO via transmit output

amplifier. When not using this pin, it should be left opened.

3.579545 MHz crystal resonator should be connected to X1 and X2.

When applying external clock 3.579545 MHz to the device, it should be

applied to X2 (not X1) via an AC-coupling capacitor of 100 pF and X1

has to be opened.

Modem receive serial data output.

Digital "1" and "0" correspond to "Mark" and "Space", respectively. When
CD (Carrier Detect) is off, RD is held at "Mark" state.

FSK receive signal and answer tone detect.

Digital "0" and "1" represent "Detect" and "Non-detect", respectively.

Modem transmit serial data input.

Digital "1" and "0" correspond to "Mark" and "Space", respectively.

FSK signal and answer tone transmit enable.
When digital "0" is applied to RS, transmitting becomes enable.

Originate/Answer mode select.

Digital "1" Æ Originate mode

Digital "0" Æ Answer mode

Refer to Table 1.

Analog transmit signal amplitude select.

Digital "1" Æ –10 dBm Typ. at AO

Digital "0" Æ –4 dBm Typ. at AO

Note : I* : Internally pulled-up input pin.

DescriptionName I/O

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Semiconductor MSM7510

ABSOLUTE MAXIMUM RATINGS

Symbol Condition Rating UnitParameter

Power Supply Voltage V

Input Voltage V

Storage Temperature T

DD

IN

STG

Ta = 25°C,

With respect to GND

–0.3 to +7 V

–0.3 to VDD + 0.3 V

–55 to +150 °C—

RECOMMENDED OPERATING CONDITIONS

Parameter

Power Supply Voltage V+5.5—+2.7—V

DD

Operating Temperature °C+85—–40—Top

Input Clock Frequency %+0.1—–0.1To 3.579545 MHzf

VDD Bypass Capacitor mF——10V

CLK

VDD

Oscillation Frequency MHz—3.579545———

Frequency Deviation ppm+100—–100+25°C ±5°C—

Temperature Characteristics ppm+50—–50–40°C to +85°C—

Crystal

Equivalent Series Resistance W50————

Load Capacitance pF—16———

ELECTRICAL CHARACTERISTICS

DC Characteristics

Symbol Condition Min. Typ. Max. UnitParameter

Power Supply Current

Digital Input Voltage

Digital Input Leakage Current

Digital Output Voltage

I

DD

I

SS

V

IL

V

IH

I

IL

I

IH

V

OL

V

OH

Operating Mode — 5.0 10.0 mA

Power Down Mode — 5.0 20.0 mA

I

I

OH

UnitMax.Typ.Min.ConditionSymbol

– GNDC

DD

( VDD = +2.7 V to +5.5 V, Top = –40°C to +85°C)

— 0 — 0.8 V

— 2.2 — V

DD

VI = 0 V * –80 — 10 mA

VI = 5 V –10 — 10 mA

= 1.6 mA 0 0.2 0.4 V

OL

= –0.4 mA 2.4 — V

DD

V

V

* Internally pulled-up pins

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Semiconductor MSM7510

AC Characteristics

Modulator/analog output (AO) characteristics

(VDD = +2.7 V to +5.5 V, Top = –40°C to +85°C)

Symbol Condition Min. Typ. Max. UnitParameter

FSK Transmit

Signal Frequency

V. 25 Answer Tone

Frequency

FSK Transmit

Signal, Answer

Tone Amplitude

Analog External

Input Signal Gain

FSK Transmit

Signal Amplitude

Ratio

Out-of-band

Energy

Output Offset Voltage

Output Load

Resistance

f

OM

f

OS

f

AM

f

AS

AST

V

AO1

Originate Mode

Answer Mode

Answer Tone Mode RS = "0" 2096 2100 2104 Hzf

AO

V

AO2

V

EA1

V

EA2

AOD

VAO – V

(MARK) – VAO(SPACE) –2 0 2 dBV

V

AO

EAI

P : In-band Signal

V

SPS

Energy
(0.3 kHz to 3.4 kHz)

To V

OFF

AO

DD

— 600 — — WR

XD = "1"

XD = "0"

XD = "1"

XD = "0"

AOG = "0"

AOG = "1"

AOG = "0"

AOG = "1"

4 kHz to 8 kHz

976

1176

1646

1846

–6

–12

–2

–8

980

1180

1650

1850

–4

–10

0

–6

——P–20

8 kHz to 12 kHz——

More than12 kHz — — P–60 dB

/2 –150 — +150 mVV

984

1184HzHz

1654

1854HzHz

–2–8dBm

dBm

2

–4dBdB

P–20dBdB

* 0 dBm = 0.775 Vrms

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Semiconductor MSM7510

Demodulator/analog input (Al, EAI) characteristics

( VDD = +2.7 V to +5.5 V, Top = –40°C to +85°C)

Symbol Condition Min. Typ. Max. UnitParameter

Receive Signal

Amplitude

Receive Signal
Detect Amplitude (CD)
Hysteresis (CD)

CD Delay Time
CD Hold Time

Receive Data (RD)

Bias Distortion

Answer Tone Detect
(CD) Freq.

Answer Tone Detect,

Non-Detect Amplitude
(CD)

Input Resistance

V

V

CDD

CDH

AI

ON

OFF

HYS

BS

ASR

AON

AOF

AI

EAI

FSK Signal, at AI

I/O Alternative Pattern

FSK Signal, at AI — — –6 dBmV

VON Æ V

OFF

See Fig. 1

FSK Signal, Answer Tone

300 bps, I/O Alternative Pattern –10 — 10 %D

2100 Hz –20 — 20 Hzf

Detect, at AI –46 — –6V

Non-Detect, at AI — — –60F

AI — 10 — MWR

EAI 20 — — kWR

OFF Æ ON

OFF Æ OFF—–48

—2—dBV

51520mst

20 40 60 mst

—

—

–42 dBm

dBm

—

dB

* 0 dBm = 0.775 Vrms

AI

CD

Figure 1 Carrier Detect (CD) Timing

t

CDD

t

CDH

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Semiconductor MSM7510

OPERATION MODE

Table 1 Operation Mode

MOD2 MOD1

00

01

10

11

FSK Modem Normal Mode (Fig.2)

Analog Loop Back Test Mode (Fig.3)

Answer Tone Transmit/Detect Mode*

Power Down Mode

* Answer Tone Transmit: RS = "0" Æ Enable

RS = "1" Æ Disable

Answer Tone Detect: Detect Æ CD = "0"

Non-detect Æ CD = "1"

When transmitting the answer tone, CD is held at digital "1".

Phone
Line

AI

AO

Receive Filter

Transmit Filter

Demodulator

Modulator

Mode

RD

DTE

XD

Phone
Line

AI

AO

SG

Figure 2 FSK Modem Normal Mode

Receive Filter

Transmit Filter

Demodulator

Modulator

Figure 3 Analog Loop Back Test Mode

RD

DTE

XD

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Semiconductor MSM7510

APPLICATION CIRCUIT

➀

➁

600 W :

Lone

Line

600 W

600 W :

600 W

External Clock

3.58 MHz

2.2 mF

–+

2.2 mF

–+

600 W

600 W

3.58 MHz

100 pF

+

10 mF

10 mF

1

–

8

+

MSM7510RS

V
AI
AO
EAI

DD

AOG
MOD
MOD

O/A
GND
X1
X2
CLK RD

MSM7510RS

1

V

DD

AI
AO
EAI

–

GND

MOD

MOD

X1
X2
CLK RD

8

16

2
1

RS

XD

CD

9

To other circuit

16

AOG

2
1

O/A

RS

XD

CD

9

CONT.

CONT.

2.2 mF

External Analog

Transmit Signal

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Semiconductor MSM7510

An Example of the External Adjustment for a Transmitting Level and Detecting Level

If you desire to change the transmitting level or detecting level, adjust the external circuit
by referring to the following circuit.

51 kW

V

51 kW

–

+

600 W

= VAO ¥ (R2/R1)

AOL

VAOL

Line

600 W

VAIL

Line transmitting level :
IC input level : VAI = V

¥ (R4/R3)

AIL

R3

R2

R1

–

+

R4

–

+

2.2 mF

2.2 mF

VAO

AO

51 kW

51 kW

AI

VAI

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Semiconductor MSM7510

PACKAGE DIMENSIONS

DIP16-P-300-2.54

(Unit : mm)

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

Epoxy resin
42 alloy
Solder plating
5 mm or more

0.99 TYP.

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Semiconductor MSM7510

SOP24-P-430-1.27-K

Mirror finish

(Unit : mm)

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

Epoxy resin
42 alloy
Solder plating
5 mm or more

0.58 TYP.

Notes for Mounting the Surface Mount Type Package

The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which
are very susceptible to heat in reflow mounting and humidity absorbed in storage.
Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the
product name, package name, pin number, package code and desired mounting conditions
(reflow method, temperature and times).

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