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PDF NJU7394 Data sheet ( Hoja de datos )
| Número de pieza | NJU7394 | |
| Descripción | Pushbutton Interface EVR | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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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-C3
BLOCK DIAGRAM
Power Button
V+
V+ Power
indicator
V+ Volume
indicator
V+
Power
Bias
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
RATT
-10,-15,-20dB,Mute
Initial volume
RINIT
adjuster
-6,-10,-14,-18 dB
Attenuator
Test mode
Up Down
V+ V+
NJU7394 Ver.3.3 _E
Output L
Output R
-1-
1 page  
TERMINAL DESCRIPTION
PIN NO. SYMBOL
FUNCTION
1 INL
3 INR
Lch Input
Rch Input
NJU7394
EQUIVALENT CIRCUIT
V+ V+
TERMINAL
DC
VOLTAGE
52.5Ω
100kΩ
V+
10pF
10pF
V+
V+/2
2 ING
Common Input
52.5Ω
1kΩ
500kΩ
10pF
VREF
10pF
V+/2
V+ V+ V+
4 SWMODE Control Mode Setting
5 STBY
Standby Setting
6 ATT Attenuator Setting
52.5Ω
It depends
on a mode
setting.
7 PWSW
Power Switch
8 U P Volume Up Switch
9
DOWN
Volume Down Switch
10 T E S T
Test Terminal
V+ V+
52.5Ω
100kΩ
V+
0V
-5-
5 Page 
■ TIMING CHART (Momentary SW mode)
●Standby release (Standby mode Æ Active mode)
PWSW (pin7) High
Low or
OPEN
High
PWIND (pin12)
Low
20ms
Output
(pin18, pin20)
V+/2
0V
280ms
●Standby (Active mode Æ Standby mode)
PWSW (pin7) High
Low or
OPEN
High
PWIND (pin12)
Low
20ms
40ms
Output
(pin18, pin20)
V+/2
0V
280ms
NJU7394
40ms
- 11 -
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NJU7394.PDF ] | |
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