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PDF LA8519M Data sheet ( Hoja de datos )
| Número de pieza | LA8519M | |
| Descripción | I/O Switch/Voice Signal-Processing IC for Cordless Telephones | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number : ENN6471
Monolithic Linear IC
LA8519M
I/O Switch/Voice Signal-Processing IC
for Cordless Telephones
Overview
The LA8519M is a cordless telephone base unit IC that
provides I/O switching, voice signal processing, and other
functions. It integrates, on a single chip, crosspoint switch,
power amplifier, electronic volume and tone control,
microphone amplifier, speech network, and other
functions.
Functions
• Speech network block
— Impedance matching, 2-wire/4-wire converter,
line driver, BN circuit network switching circuit,
transmitter amplifier, BTL receiver amplifier,
DTMF input, key tone input, receiver volume
level switching, and power supply switching
circuit.
• Audio signal-processing block
— Power amplifier, electronic volume and tone
control, preamplifier with ALC, voice level
detection (VOX), beep tone input, ring tone
(OSC) input, ring tone level switching, line
volume level switching, microphone amplifier,
crosspoint switch (10 × 9 point equivalent), and
serial interface.
Features
• Allows switching between two anti-sidetone networks
(near terminal/far terminal) depending on the line
current, and thus achieves excellent sidetone
characteristics over a wide range of line currents.
• Built-in transmitter/receiver amplifier driver power
supply switching circuit allows communication using
extension without power from the telephone network.
• The receiver amplifier supports both ceramic receivers
(BTL) and dynamic receiver (single).
• Built-in power amplifier (load: 8 to 32 Ω): VCC = 5 V,
RL = 8 Ω, Pomax = 200 mW
• The power amplifier signal path includes an electronic
volume control (7 steps of about 3.8 dB each)
• Includes a 10-input/9-output crosspoint switch that
provides mixing functions for easy implementation of
systems that support a diverse range of signal path
switching functions.
Package Dimensions
Unit:mm
3159-QIP64E
1.0
48
49
[LA8519M]
17.2
14.0 1.6
0.8 0.35 1.0
33
32
0.15
64
1
17
16
0.1
2.7
15.6 0.8 SANYO: QIP64E
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
N3000RM (OT) No. 6471-1/29
1 page  
Block Diagram
LA8519M
No. 6471-5/29
5 Page 
Continued from preceding page.
Pin No.
Pin
LA8519M
Notes
VCC
11 PRE-OUT
• Preamplifier output
12 PRE-NF
12
Equivalent circuit
VREF
11
13
VOXA-IN
• VOX amplifier input
14
VOXA-OUT
• VOX amplifier output
VCC
VREF
13
300 Ω
14
15
VREF
• Internal reference voltage output
VCC
2.25 V
5 kΩ
15
• VOX detection output. This circuit can also be
16
VOX-RCT
used as a waveform shaping circuit by forcibly
setting this pin to the high state.
• External power supply input. This voltage is
17 VCC supplied to the signal-processing system and VSP
(pin 46).
4.7 kΩ
4.7 kΩ
VCC
16
Continued on next page.
No. 6471-11/29
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet LA8519M.PDF ] | |
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