PT2256V 查看數據表（PDF） - Princeton Technology

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PT2256V

Electronic Volume Controller IC

Princeton Technology 

Electronic Volume Controller IC

PIN CONFIGURATION

Tel:886-2-66296288

Fax:886-2-29174598

URL:http://www.princeton.com.tw

PT2256V

VSS

OUT1

IN1

LT1

AGND

/UP

/DN

OSC

1

16

2

15

3

14

4

13

5

12

6

11

7

10

8

9

PT2256V

VDD

OUT2

IN2

LT2

AGND

DCO

/INH

/RST

PIN DESCRIPTION

Pin Number I/O

Description

VSS

- Negative Power Supply

OUT1

IN1

O Volume Output Pin 1

I Volume Input Pin 1

LT1

O Tap Output Pin 1 for Loudness Function

AGND

- Analog Ground Pins 1

Volume UP Control Input Pin. The

UP

I

1 step/1 push volume is controlled by pressing the UP Key. If

the key has been pushed continuously increase. Built-in

Pull-up Resistor.

DN

OSC

Volume DOWN Control Input Pin. The

I

1 step/1 push volume is controlled by pressing the DOWN

Key. If the key is continuously pressed, the volume control will

continuously decrease. Built-in Pull-up Resistor.

Oscillation Pin.

I/O The oscillation circuit of a resistor and capacitor connection.

Oscillator is activated when the key is pressed.

RST

Reset Pin.

I This pin sets the initial volume level. The volume level is set to

-46dB by “L” Input. Built-in Pull-up Resistor Low Active

/INH

I Backup Mode Input Pin

DCO

O DC Output Pin for Volume Level Meter

LT2

O Tap Output Pin 2 for Loudness Function

IN2

I Volume Input Pin 2

OUT2

O Volume Output Pin 2

VDD

- Positive Power Supply

Pin No.

1

2

3

4

5, 12

6

7

8

9

10

11

13

14

15

16

PT2256V V1.2

-3-

August, 2006

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