MAX5486EUG+T Maxim Integrated Products, MAX5486EUG+T Datasheet - Page 10

• Manufacturer Part Number: MAX5486EUG+T
• Description: IC CNTRL VOL STEREO 24TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Stereo Audio Volume Controlr

Specifications of MAX5486EUG+T

• Applications: Automotive Systems, Desktop Audio, Set-Top Boxes
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

wiper changes position, the second wiper has 126ms
to change or it changes automatically.
The power-on comparators monitor (V
(V
either of the supplies is brought back to the normal
operating voltage. The power-on reset feature sets both
wipers to -12dB. The wipers initially wake up in mute
mode (-90dB) and move to the -12dB position when
V
With DC inputs at V
exceeding the timeout period. A power-on reset places
the MAX5486 in volume-control mode.
Upon entering shutdown, the MAX5486 stores the last
wiper settings. The wipers move to the L_ end of the
resistor string when V
pops during shutdown. With DC inputs at V
the wipers move after exceeding the timeout period.
Exiting shutdown restores the wipers to their previous
settings. Shutdown also turns off all the LED indicators
to save power.
The MAX5486 features a mute function input, MUTE.
Successive low pulses on MUTE toggle its setting.
Activating the mute function forces both wipers to maxi-
mum attenuation (-90dB typ). Deactivating the mute
Stereo Volume Control with Pushbutton
Interface
Figures 3a and 3b. Balance-Control Operation
10
H
LOGIC
= V
______________________________________________________________________________________
H_
H_
L_
L_
L
to eliminate clicks and pops during power-up.
- GND). A power-on reset is initiated when
(3a)
(3b)
H
VOLUME LEVEL IS SET BY WR
WR
WR
H
and V
VOLUME LEVEL IS SET
= V
Mute Function ( MUTE )
L
L
, the wipers move after
to eliminate clicks and
Shutdown ( SHDN )
Power-On Reset
WL
WL
DD
PRESS BALL
PRESS BALL
- V
H
ONCE
ONCE
SS
and V
) and
L
,
WR
WR
function returns the wipers to their previous settings.
MUTE is internally pulled high with a resistor to V
When both wipers are in the tap 31 position
(-62dB attenuation) further commands to lower the vol-
ume place the wipers in the mute position (see Table 1).
The open-drain MODEIND indicates volume-control
mode or balance-control mode for the MAX5486.
Connect MODEIND to an LED with a series resistor to
V
ance-control mode. When the LED is off, the MAX5486
is in volume-control mode. See the Mode Control
(MODE) section for more detail on switching between
modes.
The MAX5486 includes five indicator LED drivers to dis-
play the current wiper settings in either volume or bal-
ance mode. The LED indicators are enabled by
connecting a 1MΩ resistor between LEDIND4 and
V
to V
Typical Operating Circuit . Connect LEDIND_ outputs to
GND when LED indicator drivers are not used.
In volume-control mode, all LEDs are off when the
wipers reach the highest attenuation levels (mute). All
LEDs are on at the lowest attenuation levels (0dB).
LOGIC
LOGIC
LOGIC
. Connect the LEDIND_ outputs to the LEDs and
. When the LED is on, the MAX5486 is in bal-
WL
WL
through a series resistor as shown in the
PRESS BALL
PRESS BALL
ONCE
ONCE
Mode Indicator ( MODEIND )
Level Indicator LEDs
VOLUME LEVEL MAINTAINED
VOLUME LEVEL MAINTAINED
WR
WR
BALANCE SHIFTS TO WL
BALANCE SHIFTS TO WL
WL
WL
LOGIC
.