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PDF LA74303FN Data sheet ( Hoja de datos )
| Número de pieza | LA74303FN | |
| Descripción | Monolithic Linear IC Audio Interface | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENA1181
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LA74303FN Monolithic Linear IC
Audio Interface for DSC
Overview
The LA74303FN is a SPEAKER AMP and MIC AMP built-in audio interface for DSC.
Functions
• Three-wire type SERIAL communication, MIC AMP
• MIC power supply incorporated (with buit-in pull-up resistor), ALC AMP
• PB input method: Compatible with analog or digital (ΔΣ) signal input
• 3rd order LPF(compatible with REC/PB changeover, fc=4kHz or 11kHz selectable)
• SPEAKER AMP (compatible with BEEP input MIX)
• Electronic VOLUME (compatible with SERIAL communication control)
• LINE output (with SERIAL MUTE), compatible with STANDBY control
Specifications
Maximum Ratings at Ta=25°C
Parameter
Symbol
Conditions
Maximum supply voltage 1
Maximum supply voltage 2
Allowable power dissipation
VCCA max
VCCSP max
Pd max
Ta≤85°C *
Operating temperature
Topr
Storage temperature
Tstg
* Substrate mounting condition (30mm × 50mm × 0.8mm: glass epoxy) 2S2P
Ratings
5.0
5.0
500
-15 to +85
-55 to +150
Unit
V
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 20060710-S00001 No.A1181-1/18
1 page  
LA74303FN
POWER ON Condition (SERIAL communication)
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H
VCCA (9PIN)
&
STANDBY (4PIN)
L
H
Power-on pulse
(IC inside)
L
Approx.
2ms
c
d
Dummy DATA
It is recommended to send DATA
the same as in the initial state.
Main DATA
2 to 3ms
1ms
C.S. e
1ms
First Data
communication
Delay of several hundreds NS
Approx. 500ns
Power on reset
(IC inside)
Power on reset condition
First DATA hold
f
SERIAL communication condition
CLOCK and DATA not necessary
CS, CLOCK, and DATA necessary
The POWER ON RESET state covers a period up to the rise e of the second C.S. input after fall d of POWER ON
PULSE c generated inside IC when the power is applied and the STANDBY control is canceled. e is the dummy
communication. (It is recommended to send DATA the same as in the initial state.)
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.A1181-5/18
5 Page 
Continued from preceding page.
Pin No. Pin Name DC voltage
AC voltage
9 VCCA 3.0V
10 PB IN 1.64V Reference input level
=-15dBV
LA74303FN
Description of functions
Power pin for analog signal part
PB input pin
Maximum input level
= -5dBV
In analog input mode
= 3.465Vpp
In ΔΣ input mode
11 A GND
0V
12 REC OUT 1.50V At PB reference input
Output level = -15dBV
GND pin for analog signal part
REC output pin
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Equivalent circuit diagram in pin
VCCA(=3.0V)
25kΩ 15kΩ 10kΩ
10
VREF
VCCA(=3.0V)
13 ALC DET
ALC detection pin
500Ω
20kΩ
12
3kΩ
VREF
VCCA(=3.0V)
1kΩ
13
500Ω
14 ALC IN 1.64V At MIC reference input ALC input pin
Output level = -49dBV
Max input level
=-10dBV
15 MIC OUT
1.6V
At MIC reference input
Output level = -49dBV
MIC output pin
VCCA(=3.0V)
500Ω
14
50kΩ
VREF
VCCA(=3.0V)
500Ω
9.7kΩ
15
1kΩ
VREF
Continued on next page.
No.A1181-11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet LA74303FN.PDF ] | |
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