NJU7394 Datasheet, PDF (1/16 Pages) New Japan Radio – Pushbutton Interface EVR

NJU7394
Pushbutton Interface EVR
„ GENERAL DESCRIPTION
The NJU7394 is a pushbutton interface electronic volume.
It includes a electronic volume controller with differential input,
attenuator function, some indicator and a stand-by function
(Power-saving mode).
The NJU7394 has also built-in push button interface for its
volume UP/DOWN controls and power ON/OFF controls -
making application possible without the use of micro-controller.
The NJU7394 is suitable for low power application and also for
application without micro-controller such as mobile audio player
and cradle speaker for mobile game.
„ PACKAGE OUTLINE
NJU7394VC3
„ FEATURES
• Operating Voltage
• Low operating current
• Pop-noise reduction
• Quasi-differential input
• Pushbutton interface EVR
• Adjustable initial Volume
• Attenuator / Soft MUTE Function
• CMOS Technology
• Package Outline
+2.7 to +5.5V
2mA typ. (Active mode)
1µA typ. (stand-by mode)
+6 to -62dB, MUTE
-6dB, -10dB, -14dB, -18dB
-10dB, -15dB, -20dB, MUTE
SSOP20
„ BLOCK DIAGRAM
Power Button
V⁺
V⁺ _Power
indicator
V⁺ _Volume
indicator
V⁺
Bias
Power
V⁺
Standby
Input L
Input G
Input R
SWMODE PWSW PWIND
Power Contrel
Logic
STBY
VOLIND IREF V⁺
VREF GND
Bias
Electric Volume
(+6dB to -62dB, Mute)
Attenuator
Bypass/Att.
(-10dB, -15dB,
-20dB, Mute)
Volume Control Logic
ATTADJ
VOLADJ
ATT UP DOWN TEST
V⁺
Attenuate level
adjuster
R_ATT
-10,-15,-20dB,Mute
Initial volume
R_INIT
adjuster
-6,-10,-14,-18 dB
Attenuator
Test mode
Up Down
V⁺
V⁺
NJU7394 Ver.3.1 _E
Output L
Output R
-1-