SM8221 datasheet(5/8 Pages) NPC

5 / 8 page

NIPPON PRECISION CIRCUITS-5

SM8220/SM8221

AC CHARACTERISTICS

Rating

Parameter

Symbol

Condition

MIN

TYP

MAX

Unit

Input Sensitivity

TIP, RING pin

−48

dBm

TIP, RING pin

VDD= 5V

−15

dBm

Input Level

VDD= 3V

−18

Band Pass Filter Frequency Response

60Hz

−80

(relative to 1700 Hz @

−34 dBm

1200 Hz

−1

input level)

2200Hz

4000Hz

−43

≥10000Hz

−54

Carrier Detect ON Sensitivity

CDON

CDET pin

−48

−44

dBm

Carrier Detect OFF Sensitivity

CDOFF

CDET pin

−55

−51

dBm

Oscillator Frequency

fCLK

−0.1%

3.579545

+0.1%

MHz

(

VDD= 5.0V, GND= 0V, fCLK= 3.579545MHz, Ta=

−20 to 85 ˚C, 0dBm= 0.7746Vrms @ 600Ω unless otherwise noted)

TYPICAL BAND-PASS FILTER FREQUENCY RESPONSE

(Relative to 1700 Hz @

−34 dBm input level)

-100

-80

-60

-40

-20

1000

2000

3000

4000

Frequency (Hz)

SWITCHING CHARACTERISTICS

Rating

Parameter

Symbol

Condition

MIN

TYP

MAX

Unit

Power Down Low to

tDOSC

5ms

Oscillator Start Up

Power Down Low to

tSUPD

FSK Data Detect

Carrier Detect Acquisition Time

tDAQ

End of Data to Carrier Detect High

tDCH

(VDD= 5.0V, GND= 0V, fCLK= 3.579545MHz, Ta= 25 ˚C, CL= 50pF unless otherwise noted)

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