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Ordering number: EN 5559
Monolithic Linear IC
LA7976
PAL SIF Converter Circuit
for TV and VCR Multi-system
Overview
The LA7976 is an IC that converts PAL SIF signals (5.5 MHz,
6 MHz, and 6.5 MHz) to 6 MHz.
Functions
.
Mixer, amplifier, oscillator, oscillator mute
Package Dimensions
unit : mm
3042C-SIP5
[LA7976]
9.4
6.5
7.9max
3.0
Features
.
Small SIP-5 package
.
Wide range of usage voltage (5 V to 12 V)
3.8
1.2min
0.6 2.0
1
5
1.5
0.6
0.25
1.33
SANYO : SIP5
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Maximum feed current
Allowable power dissipation Pd max Ta % 85°C 200 mW
Operating temperature Topr –20 to +85 °C
Storage temperature Tstg –40 to +150 °C
max 13.2 V
CC
I
max 3 mA
5
I
max 1 mA
4
Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating voltage range 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
CC
op 4.5to 12 V
CC
83096HA(II) No.5559-1/5
9V
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LA7976
Operating Characteristics at Ta = 25°C, VCC=9V
Parameter Symbol Conditions Test point min typ max Unit
Current drain I
5.5 MHz G5.5 80 dB/µV input Pin 5 10 13.5 17 dB
Conversion gain
Oscillation level V
Maximum output level V
Input impedance Ri 5.5 MHz input 4.8 kΩ
Pin voltages
500 kHz level difference
relative to 6 MHz
Maximum input level V
6.5 MHz G6.5 80 dB/µV input Pin 5 10 13.5 17 dB
6.0 MHz G6.0
CC
80 dB/µV input, Pin 4
grounded with 10 kΩ
OSC
max 5.5 MHz 100 dB/µV input Pin 5 104 108 112 dB/µV
O
V1 Pin 1 2.6 3 3.4 V
V4 Pin 4 7.3 7.7 8.1 V
V5 Pin 5 7.2 7.6 8 V
OSC leak Pin 5 30 40 dB
max 85 dB/µV
IN
Sample Application Circuit
Pin 2 5 6.5 9 mA
Pin 5 10 13.5 17 dB
Pin 4 15 48 80 mVp-p
Pin Assignment
Oscillator
500 kHz CSB503E5 Murata Industries, Ltd.
500 kHz EFOA512K04A Matsushita Electric, Ltd.
3
Unit (resistance: Ω, capacitance: F)
No.5559-2/5
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Reference Example 1
LA7976
Reference Example 2
Unit (resistance: Ω, capacitance: F)
No.5559-3/5
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LA7976
Figure 1
Unit (resistance: Ω, capacitance: F)
.
Pin 1 is the SIF input pin.
The filter in Figure 2 can be connected to the input section
to improve the buzz characteristic.
If C1 is too small, the buzz characteristic improves for
normal input, but the filter cuts into the sound carrier and the
buzz characteristic deteriorates for the P/S (picture/sound
carrier) ratio.
From video
output section
Figure 2
Figure 3
Unit (resistance: Ω)
Use C1 6 20 pF to 47 pF.
.
Pin 4 is the ceramic oscillator pin.
To make the oscillation waveform approach a sine wave,the
oscillation level is controlled internally.
Oscillation levels of 15 to 80 mVp-p at Pin 4 give the
waveform shown in Figure 4.
Figure 4
(Pin 4 oscillation waveform)
Figure 5
Unit (resistance: Ω)
.
Pin 5 is the output pin. The output from Pin 5 is input to the
SIF via a 6 MHz bandpass filter (BPF).
When 5.5 MHz is input to Pin 1, the spectrum shown in
Figure 6 is obtained at Pin 5.
Output level
Figure 6 (5.5 MHz input)
Ceramic BPF
chracteristic
D/U ratio
No.5559-4/5
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LA7976
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 exported without obtaining the export 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 August, 1996. Specifications and information herein are subject to
change without notice.
PS No.5559-5/5
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