KS58015

DTMF DIALER FOR BINARY DATA-IN

PIN CONFIGURATION

Fig. 2

PIN DESCRIPTION

1

2

3

4

5

6

7

8

9

10

11

12

13

14

KS58015

TEN

ST

GS

OSC IN

OSC OUT

MUTE

TONE OUT

D3

D2

D1

D0

NC

Pin No

Symbol

Descriptions

1

Positive supply input

2

TEN

Tone enable input. An internal pull-up resistor is in a chip. When this pin connects to

logic ‘low’, the oscillator is inhibited and the tone generators and output transistor are

turned off. A low to high transition on this pin latches in data from D0 ~ D3, and tone

generation continues until this pin is connected ‘low’again.

3

ST

Single tone enable. An internal pull-up resistor is in a chip. When this pin connects

to logic ‘low’, the device is in a single tone mode. For normal operation, connects this

4

GS

Group selection input. This pin is used to select the high group or low group fre-

quency, when the device is in single tone mode. An internal pull-up resistor is in a

5

Negative supply input

6

OSC IN

Oscillator input

7

OSC OUT

Oscillator output

8

MUTE

N-channel open drain output.

This pin is a logic high state, when the tone enable pin is a high state.

This pin goes a logic low state, when the tone enable pin is a low state.

9, 10,

11, 12

D0, D1,

D2, D3

DATA-INPUTS. These are the inputs for binary-coded data, which is latched in on

the rising edge of the tone enable signal.

13

N.C

No connection.

14

Tone out

This output is the open emitter of a NPN transistor. When an external load resistor