HT9200A(1998) 查看數據表（PDF） - Holtek Semiconductor

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HT9200A
(Rev.:1998)

DTMF Generators

Holtek Semiconductor 

HT9200A/B

Pin Name

I/O

Internal

Connection

Description

D0~D3

Data inputs for the parallel mode

CMOS IN When the IC is operating in the serial mode, the data input

I Pull-high terminals (D0~D3) are included with a pull-high resistor. When

or floating the IC is operating in the parallel mode, these pins become

floating.

Operation mode selection input

S/P

I CMOS IN S/P=“H”: Parallel mode

S/P=“L”: Serial mode

CLK

I

CMOS IN

Pull-high

or floating

Data synchronous clock input for the serial mode

When the IC is operating in the parallel mode, the input

terminal (CLK) is included with a pull-high resistor. When the

IC is operating in the serial mode, this pin becomes floating.

DATA

I

CMOS IN

Pull-high

or floating

Data input terminal for the serial mode

When the IC is operating in the parallel mode, the input terminal

(DATA) is included with a pull-high resistor. When the IC is

operating in the serial mode, this pin becomes floating.

DTMF

O CMOS OUT Output terminal of the DTMF signal

VDD

—

—

Positive power supply, 2.0V~5.5V for normal operation

Approximate internal connection circuits

3

21st Aug ’98

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