ML7005MB datasheet(11/25 Pages) OKI

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¡ Semiconductor

ML7005

11/24

AC Characteristics 5 DTMF Receiver

*1 See the figure 3 for timing.

The input level includes the entire range indicated in VDETDT1 and VDETDT2.

The input frequency includes the entire range indicated in fDETDT.

Parameter

Symbol

Condition

Typ.

Unit

DTMF Detect Amplitude

VDETDT1

—

Min.

Max.

–42

–10

dBm

—0

–42

—

–60

—

Per Frequency at DTRIO

2.7 V £ VDD £ 5.5 V

(VDD = 2.7 to 5.5 V, Ta = –30 to +85°C)

4.5 V £ VDD £ 5.5 V

DTMF Non-detect Amplitude

VREJDT

Signal Repetition Time

tCYCDT0

tCYCDT1

Time to Detect

tDETDT0

tDETDT1

—

——

DTTIM = "0"

DTTIM = "1"

Detect Frequency

fDETDT

—

+1.8

–1.8

Non-detect Frequency

fREJDT

——

3.8

—

–3.8

—

+6.0

–6.0

VHigh Group - VLow Group

Level Twist

VTWIST

–12

—

N/S (N : 0.3 to 3.4 kHz)

Noise to Signal Ratio

VN/S

—

360 to 440 Hz

Dial Tone Rejection Ratio

VREJDT

Time to Reject

tREJDT0

tREJDT1

—

——

Acceptable Drop Out Time

tBRKDT10

tBRKDT11

tBRKDT20

tBRKDT21

Interdigit Pause Time

tPOSDT0

tPOSDT1

Detect Delay Time

tDELDT0

tDELDT1

Detect Hold Time

tHOLDT0

tHOLDT1

SP Delay Time

tSP

—

—10

—

—24

—

0.4

—

0.4

—

—3

—

—10

To Nominal Frequency

DTTIM = "0"

DTTIM = "1"

DTTIM = "0"

DTTIM = "1"

DTTIM = "0"

DTTIM = "1"

DTTIM = "0"

DTTIM = "1"

DTTIM = "0"

DTTIM = "1"

DTTIM = "0"

DTTIM = "1"

DTTIM = "0"

DTTIM = "1"

Detect

Non-detect

SP = "1"

(Before output)

SP = "0"

(During output)

0.6

0.2

1.0

DTTIM = "1", "0"

VDETDT2

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