CD22204E 查看數據表（PDF） - Harris Semiconductor

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CD22204E

5V Low Power Subscriber DTMF Receiver

Harris Semiconductor 

CD22204

Noise will also be reduced by placing a grounded trace

around XIN and XOUT pins on the circuit board layout when

using a crystal. It is important to note that XOUT is not

intended to drive an additional device. XIN may be driven

externally; in this case, leave XOUT floating.

Timing Waveforms

TONE BURST 1

tON

ANALOG

INPUT

D1, D2

D4, D8

tD

tSU

tOFF

PAUSE

tR

TONE BURST 2

tH

DV

FIGURE 5.

PARAMETER SYMBOL MIN

Tone Time

For Detection

tON

40

For Rejection

tON

-

Pause Time

For Detection

tOFF

40

For Rejection

tOFF

-

Detect Time

tD

25

Release Time

tR

35

Data Setup Time

tSU

7

Data Hold Time

tH

4.2

Output Enable Time

-

-

CL = 50pF, RL = 1kΩ

Output Disable Time

-

-

CL = 35pF, RL = 500Ω

Output Rise Time

CL = 50pF

-

-

Output Fall Time

CL = 50pF

-

-

TYP MAX UNITS

-

-

ms

-

20

ms

-

-

ms

-

20

ms

-

46

ms

50 ms

-

-

µs

-

5

ms

200 300 ns

150 200 ns

200 300 ns

160 250 ns

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SEMICONDUCTOR

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