Rainbow Electronics MAX5457 - Manual (Page 6)

MAX5456/MAX5457
Stereo Audio Taper Potentiometers
with Pushbutton Interface
6 _______________________________________________________________________________________
Pin Description
PIN
MAX5457 MAX5456
TQFN QSOP TQFN QSOP
NAME FUNCTION
1 3 — — MODE
Volume/Balance Control. Each transition from high to low toggles between volume
and balance modes.
MODE is pulled high internally with a 50k Ω resistor to V
LOGIC
.
On power-up, the MAX5457 is in volume-control mode.
2 4 — — MODE_IND
Volume-Control/Balance-Control Mode Indicator Open-Drain Output. Connect to
an LED through a resistor to V
LOGIC . When the LED is on, the MAX5457 is in
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 5 3 5 H0 Potentiometer 0 High Terminal. H0 and L0 terminals can be reversed.
4 6 4 6 L0 Potentiometer 0 Low Terminal. L0 and H0 terminals can be reversed.
5 7 5 7 W0 Potentiometer 0 Wiper Terminal
6 8 6 8 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 9 7 9 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 Ω to V
LOGIC .
8 10 8 10 W1 Potentiometer 1 Wiper Terminal
9 11 9 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 V SS Negative Power Supply. Bypass with 0.1µF to ground.
12 14 12 14 GND Ground
13 15 13 15 V LOGIC Digital Logic Power Supply. Bypass with 0.1µF to ground.
14 16 14 16 V DD 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
Ω to V
LOGIC .
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
Ω to V
LOGIC .
— — 1 3 BAL1
Channel 1 Balance-Control Input. Pressing BAL1 moves the balance towards
channel 1. BAL1 is internally pulled up with 50k Ω to V
LOGIC .
— — 2 4 BAL0
Channel 0 Balance-Control Input. Pressing BAL0 moves the balance towards
channel 0. BAL0 is internally pulled up with 50k Ω to V
LOGIC .
— — 15 1 VOLDN
Downward Volume-Control Input. Pressing VOLDN moves both wipers towards
the L terminals. VOLDN is internally pulled up with 50k Ω to V
LOGIC .
— — 16 2 VOLUP
Upward Volume-Control Input. Pressing VOLUP moves both wipers towards the
H terminals. VOLUP is internally pulled up with 50k Ω to V
LOGIC .