ML7020 データシートの表示（PDF） - Oki Electric Industry

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ML7020

1200 bps MODEM for Remote Control Systems

Oki Electric Industry 

1Semiconductor

FEDL7020-02

ML7020

AC Characteristics (Call Progress Tone Section)

Parameter

Transmit level

Symbol

VCPT

Transmit frequency fCPT

Distortion rate

Detection level

Non-detection level

Detection frequency

Non-detection

frequency

THDCPT

VDETCP

VREJCP

fDETCP

frejCP

Detection

persistence period

Detection delay time

Detection hold time

tDETCP

tREJCP

tDELCP

tHOLCP

Condition

Pin TO

During 400 Hz output

Pin TO

During 800 Hz output

Pin TO

400 Hz, level of LI1O and LI2O

400 Hz, level of LI1O and LI2O

—

—

Detection

See Figure 4. Non-detection

(VDD = 4.5 to 5.5 V, Ta = –40 to +85°C)

Min.

Typ.

Max.

Unit

–21.5

–20.0 –18.5

dBm

380

400

420

Hz

780

800

820

Hz

—

—

–23

dB

–46

—

–6

dBm

—

—

–60

dBm

360

—

440

Hz

510

—

—

Hz

—

—

300

Hz

30

—

—

ms

—

—

10

ms

10

17

30

ms

10

17

30

ms

CPT input

tREJCP

tDETCP

DETB

tDELCP

Figure 4 Call progress tone detection timing

tHOLCP

12/19

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