Stereo Audio Taper Potentiometers

with Pushbutton Interface

6

_______________________________________________________________________________________

Pin Description

PIN

MAX5457

MAX5456

TQFN

QSOP

TQFN

QSOP

NAME

FUNCTION

13

—

—

MODE

Volume/Balance Control. Each transition from high to low toggles between volume

and balance modes. MODE is pulled high internally with a 50k

On power-up, the MAX5457 is in volume-control mode.

24

—

—

MODE_IND

Volume-Control/Balance-Control Mode Indicator Open-Drain Output. Connect to

balance-control mode. When the LED is off, the MAX5457 is in volume-control

mode. See the Mode Indicator, MODE_IND section for more detail.

3

535

H0

Potentiometer 0 High Terminal. H0 and L0 terminals can be reversed.

4

646

L0

Potentiometer 0 Low Terminal. L0 and H0 terminals can be reversed.

5

757

W0

Potentiometer 0 Wiper Terminal

6

868

SHDN

Active-Low Shutdown Input. In shutdown mode, the MAX5456/MAX5457 store the

last wiper settings. The wipers move to the L end of the resistor string, and the H

end of the resistor string disconnects from the signal input. Terminating shutdown

mode restores the wipers to their previous settings.

7

979

MUTE

Mute Input. When MUTE is low, the wiper goes to the highest attenuation setting

(see Table 1). MUTE is internally pulled up with 50k

8108

10

W1

Potentiometer 1 Wiper Terminal

9119

11

L1

Potentiometer 1 Low Terminal. L1 and H1 terminals can be reversed.

10

12

10

12

H1

Potentiometer 1 High Terminal. H1 and L1 terminals can be reversed.

11

13

11

13

Negative Power Supply. Bypass with 0.1µF to ground.

12

14

12

14

GND

Ground

13

15

13

15

Digital Logic Power Supply. Bypass with 0.1µF to ground.

14

16

14

16

Analog Power Supply. Bypass with 0.1µF to ground.

15

1

—

—

DN/BAL0

Downward Volume/Channel 0 Balance-Control Input. In volume mode, pressing

DN/BAL0 moves both wipers towards the L terminals. In balance mode, pressing

DN/BAL0 moves the balance towards channel 0. DN/BAL0 is internally pulled up

with 50k

16

2

—

—

UP/BAL1

Upward Volume/Channel 1 Balance-Control Input. In volume mode, pressing

UP/BAL1 moves both wipers towards the H terminals. In balance mode, pressing

UP/BAL1 moves the balance towards channel 1. UP/BAL1 is internally pulled up

with 50k

——

1

3

BAL1

Channel 1 Balance-Control Input. Pressing BAL1 moves the balance towards

channel 1. BAL1 is internally pulled up with 50k

——

2

4

BAL0

Channel 0 Balance-Control Input. Pressing BAL0 moves the balance towards

channel 0. BAL0 is internally pulled up with 50k

——

15

1

VOLDN

Downward Volume-Control Input. Pressing VOLDN moves both wipers towards

the L terminals. VOLDN is internally pulled up with 50k

——

16

2

VOLUP

Upward Volume-Control Input. Pressing VOLUP moves both wipers towards the

H terminals. VOLUP is internally pulled up with 50k