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MSM7510GS-K

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

Oki Electric Industry 

Semiconductor

MSM7510

AC Characteristics

Modulator/analog output (AO) characteristics

Parameter

Symbol

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

Condition

Min. Typ. Max. Unit

FSK Transmit

fOM

Originate Mode

XD = "1"

976 980 984 Hz

fOS

XD = "0"

1176 1180 1184 Hz

Signal Frequency

fAM

Answer Mode

XD = "1"

1646 1650 1654 Hz

fAS

XD = "0"

1846 1850 1854 Hz

V. 25 Answer Tone

fAST

Frequency

Answer Tone Mode RS = "0"

2096 2100 2104 Hz

FSK Transmit

VAO1

Signal, Answer

Tone Amplitude

VAO2

AOG = "0"

–6

–4

–2 dBm

AO

AOG = "1" –12 –10 –8 dBm

Analog External

VEA1

Input Signal Gain

VEA2

FSK Transmit

VAO – VEAI

AOG = "0"

–2

0

2 dB

AOG = "1"

–8

–6

–4 dB

Signal Amplitude

Ratio

VAOD

VAO(MARK) – VAO(SPACE)

–2

0

2 dB

Out-of-band

Energy

P : In-band Signal

4 kHz to 8 kHz —

VSPS

Energy

8 kHz to 12 kHz —

(0.3 kHz to 3.4 kHz) More than12 kHz —

— P–20 dB

— P–20 dB

— P–60 dB

Output Offset Voltage

VOFF

Output Load

Resistance

RAO

To VDD/2

—

–150 — +150 mV

600

—

—W

* 0 dBm = 0.775 Vrms

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