MSM6927 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM6927

1200 bps Single Chip FSK MODEM

Oki Electric Industry 

¡ Semiconductor

MSM6927/6947

Analog Interface Characteristics

1. MSM6927

Transmit carrier out (AO)

Parameter

Carrier Frequency

Output Resistance

Load Resistance

Load Capacitance

Transmit Level

Symbol

Mark

1

fM

Space

0

fS

ROXA

RLXA

CLXA

VOXA

Output Offset Voltage

VOSX

Out-of-Band Energy

(Referred to Carrier Level)

EOX

(VA = 12 V ±10%, VD = 5 V ±5%, Ta = 0 to 70°C)

Condition

Min. Typ. Max. Unit

fCRYSTAL = 3.579545 MHz

1290

2090

1300

2100

1310

Hz

2100

—

—

—

200 W

—

50

—

—

kW

—

—

—

100 pF

—

4

6

8 *1 dBm

—

VA

2

–1

VA

2

VA

2

+1

V

C1 = 0.047 mF

Refer to Fig. 1

dB

Receive carrier input (AIN)

Parameter

Symbol

Input Resistance

RIRA

Receive Signal Level Range

VIRA

Carrier Detect Level

ON VCD ON

OFF VCD OFF

Carrier Detect Hysteresis

HYS

Condition

—

—

R8 = 33 kW *2

R9 = 51 kW

VCD ON – VCD OFF

Min.

100

–48

—

–48

2

Typ.

—

—

—

—

—

Max. Unit

— kW

–6

–43 *1 dBm

—

—

dB

Receive filter

Parameter

Group Delay Distortion

Symbol

DDL

Condition

1100 to 2300 Hz

Notes: *1 0 dBm = 0.775 Vrms

*2 The resistor values are typical

Min.

—

Typ.

210

Max. Unit

—

ms

12/31

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