EM78P813

8-bit OTP Micro-controller

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* This specification is subject to change without notice.

59

2004/8/19

(V1.6)

FSK AC Characteristic (Vdd=5V,Ta=+25

°C)

CHARACTERISTIC

Min

Typ

Max Unit

FSK sensitivity

Low Level Sensitivity Tip & Ring @SNR 20dB

-40

-48

dBm

High Level Sensitivity Tip & Ring @SNR 20dB

0

dBm

Signal Reject

-51

dBm

FSK twist

Positive Twist (High Level)

+10

dB

Positive Twist (Low Level)

+10

dB

Negative Twist (High Level)

-6

dB

Negative Twist (Low Level)

-6

dB

DTMF (DTMF receiver) AC Characteristic (Vdd=5V,Ta=+25

°C)

CHARACTERISTIC

Min

Typ

Max Unit

DTMF receiver

Low Level Signal Sensitivity

-36

dBm

High Level Signal Sensitivity

0

dBm

Low Tone Frequency

±2

%

High Tone Frequency

±2

%

DTMF receiver noise endurance

Signal to noise ratio

15

dB

TONE generators for AC Characteristic (Vdd=5V,Ta=+25

°C)

CHARACTERISTIC

Min

Typ

Max Unit

Tone1/Tone2 signal strength (root mean square voltage)

Tone1 signal strength V1rms (ps1)

130

155

180

ｍV

Tone2 signal strength V2rms (ps1)

1.259V1rms

ｍV

Tone twist

(Tone1 – Tone2) twist

-2

dB

Tone frequency deviation

Frequency deviation

±1

%

(ps1) : V1rms and V2rms has 2dB difference. It means 20log(V2rms/V1rms) = 20log1.259 = 2 (dB)

DED AC Characteristic (Vdd=+5.0V,Ta=+25℃)

CHARACTERISTIC

MIN

TYP

MAX

UNIT

Input sensitivity TIP and RING for DED, DEDTHD bit=0

-45

--

dBm

Input sensitivity TIP and RING for DED, DEDTHD bit=1

-35

--

dBm

Timing characteristic (Vdd=5V,Ta=+25

°C)

Description

Symbol

Min

Typ

Max Unit

Oscillator timing characteristic

OSC start up

32.768kHz

Tosc

1500 ms

3.579MHz PLL

5

10

us

FSK timing characteristic

Carrier detect low

Tcdl

--

10

14

ms

Carrier detect low to data valid

Tcdv

--

10

20

ns

Power up to FSK(setup time)

Tsup

--

15

20

ms

End of FSK to Carrier Detect high

Tcdh

--

4

ms