MSM7524 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM7524

DTMF Transceiver

Oki Electric Industry 

¡ Semiconductor

MSM7524

ANALOG INTERFACE CHARACTERISTICS

DTMF Generator

Parameter

DTMF Tone Transmit Amplitude

Tone Transmit Amplitude Ratio

Tone Frequency Accuracy

Total Harmonic Distortion

Out-of-Band Spurious *

*P: Inband energy

Symbol

VPBTL

VPBTH

VPBDF

fDPB

THDPB

VSPS

(VDD = +5 V ±10%, Ta = –25°C to 85°C)

Condition

Min. Typ. Max. Unit

Low Group Tone –8.5 –6.5 –4.5 dBm

High Group Tone –7.5 –5.5 –3.5 dBm

VPBTH-VPBTL

0.0 1.0 2.0 dB

To Nominal

at

—

— ±1.5 %

Rrequency

PBTO

Total Harmonics

—

— –23 dB

- Fundamental

4 to 8 kHz

—

— P-20 dB

8 to 12 kHz

—

— P-60 dB

12 kHz to

—

— P-60 dB

Call Progress Tone (CPT) Generator

Parameter

Tone Amplitude

Tone Transmit Amplitude Ratio

Tone Harmonic Distortion

Symbol

VCPT

fCPT0

fCPT1

fCPT2

fCPT3

THDCPT

Condition

(VDD = +5 V ±10%, Ta = –25°C to 85°C)

Min. Typ. Max. Unit

—

–2.0

0

2.0 dBm

CPT2 = 0, CPT1 = 0 380 400 420 Hz

at

CPT2 = 0, CPT1 = 1 330 350 370 Hz

CPTO

CPT2 = 1, CPT1 = 0 420 440 460 Hz

CPT2 = 1, CPT1 = 1 460 480 500 Hz

Total Harmonics

—

—

– Fundamental

— –23 dB

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