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PDF LA74302FN Data sheet ( Hoja de datos )
| Número de pieza | LA74302FN | |
| Descripción | Monolithic Linear IC Audio Interface | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENA1180
www.DataSheet4U.com
LA74302FN Monolithic Linear IC
Audio Interface for DSC
Overview
The LA74302FN is a SPEAKER AMP and MIC AMP built-in audio interface for DSC.
Functions
• Three-wire type SERIAL communications, MIC AMP
• MIC power supply provided
• ALC (ALC LEVEL: level changeover in three stages possible)
• REC/PB LPF (fc=4kHz: 3rd order)
• LINE output (with SERIAL MUTE)
• SPEAKER AMP (compatible with BEEP input MIX)
• With serial communications control electronic VOLUME
Specifications
Maximum Ratings at Ta=25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Ta≤85°C *
Conditions
* Substrate mounting condition (30mm × 50mm × 0.8mm: glass epoxy) 2S2P
Ratings
5.0
500
-15 to +85
-55 to +150
Unit
V
mW
°C
°C
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
52808 TI IM 20060727-S00005 No.A1180-1/12
1 page  
LA74302FN
POWER ON Condition (SERIAL communication)
Power Supply
H
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L
H
POWER ON PULSE
(Signal inside IC)
L
Width of several hundreds NS
c
d
H
C.S. e
L
H
POWER ON RESET
(Singnal inside IC)
← First DATA →
communication
←→
Delay of
several
hundreds
NS
f
L
POWER ON RESET condition
→ ←SERIAL communication condition
↑
First DATA hold
The POWER ON RESET condition continues up to the second C.S rising (e) entered after falling (d) of POWER ON
PULSE (c) generated inside IC at a time of power ON.
Actually, because of delay of several hundreds NS in the IC, the first DATA condition begins in (f) and the normal
SERIAL communication condition begins after (f).
No.A1180-5/12
5 Page 
Continued from preceding page.
PIN Pin Name DC Voltage
18 MIC ATT
0.30V
AC Voltage
LA74302FN
Description of Functions
MIC Amp attenuator output pin
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Equivalent Circuit Diagram in Pin
VCCA(=3.0V)
19 MIC NFB
1.64V
MIC Amp NFB pin
20 MIC GND
21 MIC IN
0V
1.64V
-70dBV
(Reference input
level)
MIC Amp block GND pin
MIC input pin
22 MIC VCC
2.30V
MIC power pin
23 VREFL
2.30V
MIC VCC and VREFL ripple
removal pin
24 SP GND
28
25 SPK OUT+
0V
1.25V
-10dBV
(EVR MAX at PB
reference input)
Speaker GND pin
Speaker positive-phase output
pin
26 VCCSP
3.0V
Speaker power pin
4.3 100kΩ 300Ω
kΩ
18
950Ω
19
VCCA(=3.0V)
500Ω
21
70kΩ
VREFL
VCCA(=3.0V)
100Ω
500Ω
22
20kΩ
VCCA(=3.0V)
13kΩ
23
12.4kΩ
30.7kΩ
VCCSP(=3.0V)
25 5.1kΩ
5kΩ
27
No.A1180-11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LA74302FN.PDF ] | |
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