LC73860 查看數據表（PDF） - SANYO -> Panasonic

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LC73860

DTMF Receiver IC

SANYO -> Panasonic 

Block Diagram

LC73860

Pin Functions

Number

1

2

3

4

5

Name

INPUT

PD

OSCI

VSS

SD

6

ACK

7

EST

8

VDD

I/O

Description

I Input coupling capacitor connection. Biased internally to VDD/2.

I Power-down mode is selected when HIGH.

I 4.194304MHz external clock input.

Ground (0V).

O Outputs the 4-bit serial, decoded DTMF output, least significant bit first.

Shift data to SD control.

I Four pulses are used to output the 4-bit DTMF code. Before the first rising edge, the

data is latched into the shift register.

O

Indicates the presence of a DTMF signal when HIGH. This pin can be monitored and

after a short delay, data can be accessed by applying 4 pulses to ACK.

O 4.5 to 5.5V supply voltage.

Test/Application Circuit

No.4367–3/5

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