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Ordering number:ENN3301A
Monolithic Linear IC
LA8515N
Telephonic Speech Network
Overview
The SANYO LA8515N telephonic speech network provides amplification, switching and line drive functions for telephone equipment. It can perform 2 to 4 line conversion and impedance matching, and supports both DTMF and keytone signals. The LA8515N's low operating current reduces line load. Switching between the DTMF/keytone and voice circuits is controlled directly from a single MUTE input. The LA8515N is available in plastic 20-pin DIPs.
Package Dimensions
unit:mm 3021C-DIP20
[LA8515N]
24.0 20 11
7.62 6.4
1 1.0
10
* Direct connection to low-impedance receiver. * DTMF/keytone and voice circuit switching controlled by a single MUTE input. * Receive and transmit gain are adjusted automatically in response to the line current. * Applicable to a wide variety of transmitters and receivers by selecting external components.
(0.57)
2.54
0.5
1.2
Specifications
Maximum Ratings at Ta = 25C
Parameter Line voltage Line current Allowable power dissipation Operating temperature Storage temperature Symbol VL max IL max Pd max Topr Tstg Conditions Ratings 15 150 1200 -30 to +75 -55 to +150 Unit V mA mW
C C
Operating Characteristics at Ta = 25C, f=1kHz, See specified Test Circuit.
Parameter Symbol IL=20mA Line voltage VL IL=50mA IL=120mA IL=20mA Supply voltage VCC IL=50mA IL=120mA Conditions Ratings min typ 3.6 6.1 12.3 2.1 3.6 7.1 max Unit V V V V V V
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
12501TN (KT)/D159TA/O319TA, TS (US) No.3301-1/6
0.51min (3.25) 3.3 3.9max
Features
SANYO : DIP20
Continued on next page.
0.25
LA8515N
Continued from preceding page.
Parameter Transmit gain Receive gain DTMF gain Transmit dynamic range Receive dynamic range DTMF input impedance KTI input impedance MUTE high-level input voltage MUTE low-level input voltage Transmit attenuation Receive attenuation Reference voltage Symbol GT GR GMF DRT DRR ZIMF ZKTI VIH VIL GT GR VREF Conditions IL=20mA, VIN=-55dBV IL=120mA, VIN=-55dBV IL=20mA, VIN=-20dBV IL=120mA, VIN=-20dBV IL=20mA, VIN=-30dBV IL=120mA, VIN=-30dBV IL=20mA, THD=4% IL=120mA, THD=4% IL=20mA, THD=10% IL=120mA, THD=10% IL=50mA IL=50mA IL=20mA to 120mA IL=20mA to 120mA IL=30mA, PADC grounded via 24k IL=30mA, PADC grounded via 24k IL=20mA IL=50mA IL=120mA Ratings min 38 35 -4 -9.5 23 20 2.5 4.6 0.3 0.5 24 17 1.5 0 3 6 0.65 1.13 2.1 VCC 0.2 typ 40 37 -2 -7 25 22 0 -5 27 max 42 Unit dB dB dB dB dB dB Vp-p Vp-p Vp-p Vp-p k k V V dB dB V V V
Note) Be careful of dielectric breakdown.
Equivalent Circuit Block Diagram
No.3301-2/6
LA8515N
Test Circuit
Sample Application Circuit
No.3301-3/6
LA8515N
Pin Functions
Pin Number 1 2 Pin Name VL TOI Description Line voltage Connected to the positive side of the line diode bridge. See the application circuit. Transmit output current source, input side Connected to VL through a 27 resistor. Select the value of this resistor after considering the maximum expected line current. Transmit output current source, output side As above, but to ground through a 15 resistor. Not used. This pin has a DC bias and should not be connected. AC signal reference voltage An internally-generated reference voltage. DTMF input The signal on this pin is output on VL (pin 1) when MUTE (pin 7) is LOW. It should be decoupled using a capacitor since it is biased with the REF voltage. Mute control input Switches between the transmit side DTMF or receive side keytone, and voice circuits. LOW : DTMF output, keytone receive output. HiGH : Voice circuits. Reference voltage Internal amplifier bias voltage. Requires an external capacitor. This voltage should not be used by external circuitry. Ground Connected to the negative side of the line diode bridge. Key tone input Switched through to the receive circuit output when MUTE (pin 7) is LOW. It should be decoupled using a capacitor since it is biased with REF voltage. Transmit input amplifier non-inverting input Transmit voice circuit input. Requires a DC bias from REF (pin 8) through a resistor. Transmit input amplifier inverting input Negative feedback input. Amplifier gain and frequency response are controlled by the feedback network. Transmit input amplifier output Pad control input The value of the resistor between this pin and either VCC or ground determines the shape of the line-current vs. gain characteristics. See Electrical Characteristics. Receive input amplifier inverting input Negative feedback is applied from the amplifier output to control amplifier gain and frequency response. Receive input amplifier inverting input This pin is internally biased through a resistor using REF. Receive input amplifier output Receive circuit output Connect to a low-impedance (approximately 15k) receiver through a decoupling capacitor. No connection Supply voltage Supply voltage for internal circuitry. This supply should not be used as an external circuit supply except as the highlevel voltage for the MUTE and PADC inputs.
3 4 5 6
TOO
AC BIAS DTMF
7
MUTE
8 9 10
REF GND KTI
11 12 13 14
TPI2 TPI1 TPO PADC
15 16 17 18 19 20
RPI2 RPI1 RPO RO NC VCC
No.3301-4/6
LA8515N
No.3301-5/6
LA8515N
Specifications of any and all SANYO 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. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be expor ted without obtaining the expor t license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of January, 2001. Specifications and information herein are subject to change without notice.
PS No.3301-6/6

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