Page 1
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.
Monolithic Linear IC
Two-Channel, Noise Reduction Processor
for 8-mm VCR PCM
Ordering number:ENN3806A
LA7451M
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Overview
The LA7451M is a two-channel, noise reduction processor
IC for 8-mm video recorder, pulse code modulation (PCM)
circuits.
The LA7451M incorporates two filters, on per channel,
comprising emphasis circuits, weighting compensators,
voltage-controlled amplifiers (VCA) and detectors. Filter
control circuitry sets the emphasis and weighting of each
filter.
The LA7451M operates from a 4.75V supply and is avail-
able in 30-pin MFPs.
Package Dimensions
unit:mm
3073B-MFP30SD
[LA7451M]
15.2
30
16
7.9
9.2
10.5
Features
• Filter control.
• Emphasis circuits.
• W eighting compensators.
• Voltage-controlled amplifiers (VCA).
• 4.75V supply.
• 30-pin MFP.
Specifications
Maximum Ratings at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppuSV
noitapissidrewoPxamdP 003Wm
erutarepmetgnitarepOrpoT 57+ot02–
erutarepmetegarotSgtsT 051+ot04–
Recommended Operating Conditions at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppuSV
egnaregatlovylppuSV
CC
CC
CC
1
0.4
15
1.0
0.25
(2.25)
2.45max
0.1
(0.6)
SANYO : MFP30SD
0.65
7V
˚C
˚C
57.4V
5.5ot5.4V
O2500TN (KT)/D061TS No.3806–1/11
Page 2
LA7451M
Operating Characteristics at Ta = 25˚C, VCC=4.75V
retemaraPlobmySsnoitidnoC
tnerructnecseiuqedom-gnidroceRI
tnerructnecseiuqedom-kcabyalPI
egatlovecnerefeRV
]edomBP[
leveltuptuOV
laitnereffidleveltuptuolennahCV
noitrotsidcinomrahlatoTDHT
leveltuptuomumixaMV
levelesiontuptuomumixaMV
]edomCER[
leveltuptuOV
noitrotsidcinomrahlatoTDHT
leveltupnimumixaMV
levelesiontuptuomumixaMV
noitcejerklatssorclennahCRCV
]lortnoC[
egatlovtcelesedom-gnidroceRV
egatlovtcelesedom-kcabyalPV
Note
JIS=Japanese Industrial Standard
RCC
PCC
FER
PO
HCO
PVI
PMO
PNO
RO
RVI
RMI
RNO
R
P
V
I
V
I
k1=gR Ω retlifA-SIJ,301–69–sBd
k1=gR Ω retlifA-SIJ,66–06–sBd
I
sgnitaR
nimpytxam
0.010.310.61Am
0.010.310.61Am
23nip:CD092.2573.2554.2V
R,zH004=f,sBd61–=
k01= Ω 0.81–0.61–0.41–sBd
L
R,zH004=f,sBd61–=
k01= Ω 1–01+Bd
L
R,zH004=f,sBd61–=
k01= Ω 1.05.0%
L
R,zH004=f,%1=DHT
k01= Ω 0.00.3sBd
L
R,zH004=f
k2= Ω V:
L
R,zH004=f
k2= Ω V:
L
R,zH004=f
k2= Ω V:
L
R,zHk7=f
k2= Ω V:
L
R,zHk7=f
L
R,zHk7=f
L
I
k2= Ω V:
I
k2= Ω V:
I
R,zH004=f,%1=DHT
zHk1=f,sBd6–= 54–Bd
sBd61–=0.71–0.61–0.51–sBd
I
sBd63–=5.72–5.62–5.42–sBd
I
sBd65–=5.73–0.63–5.43–sBd
I
sBd61–=4.31–9.11–4.01–sBd
sBd63–=4.32–9.12–4.02–sBd
sBd65–=4.33–9.13–4.03–sBd
R,zH004=f,sBd61–=
k2= Ω 2.05.0%
L
k2= Ω 0.00.3sBd
L
LORTNOCCER/BPtaderusaeM0.00.1V
LORTNOCCER/BPtaderusaeM0.3V
tinU
V
CC
Pin Assignment
No.3806–2/11
Page 3
Block Diagram
LA7451M
Pin Functions
rebmuNemaNtiucrictnelaviuqEnoitcnuF
1FERI
21SAIBACV
lanretxeehT.noitcennocrotsisertnerrucecnereferretliF
.tnerrucecnereferehtsenimretedecnatsiserDNG-ot-FERI
.V3siegatlovlanimoN
siecnadepmitupnI.noitcennocroticapactesffoCDACV
k01 Ω .V4.2siegatlovlanimondna
Continued on next page.
No.3806–3/11
Page 4
Continued from preceding page.
rebmuNemaNtiucrictnelaviuqEnoitcnuF
LA7451M
31FERV
41NIRN
51BFNBPAOM
61TUOAOM .V4.2siegatlovlanimoN.1uptuoreifilpmagnitareponiaM
09 Ω V5.0(V4.2siegatlovlanimondna
.)
CC
.V4.2siegatlov
.V4.2
k02siecnadepmitupnI.tupni1lennahC Ω lanimondna
siecnadepmituptuO.tuptuoegatlovecnerefer1lennahC
kcabdeefevitagenedom-kcabyalpreifilpmagnitareponiaM
siegatlovlanimoN.noitasnepmocerutreparofdesU.1tupni
71CPAOM
81TUOCERRN .reffubtuptuoecnadepmi-woL.1tuptuoedom-gnidroceR
V1.3siegatlovlanimoN.1noitcennoc
roticapacnoitasnepmocesahpreifilpmagnitareponiaM
Continued on next page.
No.3806–4/11
Page 5
Continued from preceding page.
rebmuNemaNtiucrictnelaviuqEnoitcnuF
LA7451M
91GNITHGIEW
011HCT
111CT
.V4.2
V6.2siegatlovlanimoN
k4siecnadepmitupnI.noitcennoc Ω siegatlovlanimondna
.V2siegatlovlanimoN.1noitcennoc
roticapacreifitcerevaw-lluf1rotasnepmocgnithgieW
.1noitcennocroticapactnemtsujdaemitdlohrotceteD
roticapactnemtsujdaemityrevocerdnakcattarotceteD
21
31
1SISAHPME
1BFN
1SISAHPME
1TUO
.V4.2siegatlov
lanimoN.1tupnikcabdeefevitagenreifilpmasisahpmE
.V4.2siegatlovlanimoN.1tuptuoreifilpmasisahpmE
Continued on next page.
No.3806–5/11
Page 6
Continued from preceding page.
rebmuNemaNtiucrictnelaviuqEnoitcnuF
LA7451M
411BFNCERAOM
51DNGdnuorG
61
712BFNCERAOM
CER/BP
LORTNOC
.V4.2siegatlovlanimoN.1tupni
.HGIHnehw,kcabyalp,nepo
.V4.2siegatlovlanimoN.2tupni
kcabdeefevitagenedom-gnidrocerreifilpmagnitareponiaM
roWOLnehwgnidroceR.tupnitcelesgnidrocer/kcabyalP
kcabdeefevitagenedom-gnidrocerreifilpmagnitareponiaM
81
91
1SISAHPME
2TUO
1SISAHPME
2BFN
.V4.2siegatlov
.V4.2siegatlovlanimoN.2tuptuoreifilpmasisahpmE
lanimoN.2tupnikcabdeefevitagenreifilpmasisahpmE
Continued on next page.
No.3806–6/11
Page 7
Continued from preceding page.
rebmuNemaNtiucrictnelaviuqEnoitcnuF
LA7451M
022CT
122HCT
222GNITHGIHW
.V2siegatlovlanimoN.2noitcennoc
roticapactnemtsujdaemityrevocerdnakcattarotceteD
.2noitcennocroticapactnemtsujdaemitdlohrotceteD
.V6.2siegatlovlanimoN
roticapacreificerevaw-lluf2rotasnepmocgnithgieW
k4siecnadepmitupnI.noitcennoc Ω siegatlovlanimondna
.V4.2
322TUOCERRN .reffubtuptuoecnadepmi-woL.2tuptuoedom-gnidroceR
422CPAOM
.V1.3siegatlovlanimoN.2noitcennoc
roticapacnoitasnepmocesahpreifilpmagnitareponiaM
Continued on next page.
No.3806–7/11
Page 8
LA7451M
Continued from preceding page.
rebmuNemaNtiucrictnelaviuqEnoitcnuF
522TUOAOM .V4.2siegatlovlanimoN.2tuptuoreifilpmagnitareponiaM
622BFNBPAOM
722NIRN
822FERV
92V
CC
09 Ω V5.0(V4.2siegatlovlanimondna
kcabdeefevitagenedom-kcabyalpreifilpmagnitareponiaM
.V4.2
.V4.2siegatlov
ylppusV5
k02siecnadepmitupnI.tupni2lennahC Ω lanimondna
CC
.)
siegatlovlanimoN.noitasnepmocerutreparofdesU.2tupni
siecnadepmituptuO.tuptuoegatlovecnerefer2lennahC
032SAIBACV
k01 Ω .V4.2siegatlovlanimondna
siecnadepmitupnI.noitcennocroticapactesffoCDACV
No.3806–8/11
Page 9
Test Circuit
LA7451M
Test Condition Switch Positions
retemaraPlobmyS1WS2WSV
tnerructnecseiuqedom-gnidroceRI
tnerructnecseiuqedom-kcabyalPI
egatlovecnerefeRV
egatlovtcelesedom-gnidroceRV
egatlovtcelesedom-kcabyalPV
Recording mode
retemaraPlobmyS1WS2WSV
leveltuptuOV
noitrotsidcinomrahlatoTDHT
leveltupnimumixaMV
levelesiontuptuOV
noitcejerklatssorclennahCRC
RCC
PCC
FER
R
P
RO
R
RMI
RNO
AA DNG–A
AAVCC–A
AA DNG–V
AA DNG–V
BA–V
BA–V
BA DNGV
AB DNGV
BA DNGV
AB DNGV
BA DNGV
AB DNGV
AA DNG–V
AA DNG–V
AB DNGV
BA DNGV
1TC
1TC
tupnItnioptseT
V,
1TC
1NI
V,
1TC
1NI
tupnItnioptseT
1NI
2NI
1NI
2NI
1NI
2NI
2NI
1NI
V
V
V5OV,
V6OV,
1O
2O
V,
1TC
1O
V,
1TC
1O
V
6O
V
6O
V
5O
V
6O
1NI
2NI
5O
6O
V
5O
V
6O
No.3806–9/11
Page 10
Playback mode
retemaraPlobmyS1WS2WSV
leveltuptuOV
laitnreffidleveltuptuOV
noitrotsidcinomrahlatoTDHT
leveltupnimumixaMV
levelesiontuptuOV
Test Setup Procedure
1. Select playback mode.
2. Apply a 400Hz, –16dBs input signal, V
IN1
measure the AC voltage across the 4.7µF capaci-
tor connected to VCA BIAS1, V1.
Sample Application Circuit
PO
HCO
P
PMO
PNO
, and
LA7451M
BAVCCV
1TC
ABVCCV
A/BB/AVCCV
BAVCCV
ABVCCV
BAVCCV
ABVCCV
AAVCC–V
AAVCC–V
3. Apply a 7kHz, –16dBs input signal, V
measure the AC voltage, V2 again as in step 2.
4. Adjust the volume control variable resistor so
that V1 – V2 becomes –6.8dB.
tupnItnioptseT
1NI
2NI
V/
1NI
2NI
1NI
2NI
1NI
2NI
IN1
, and
V3OV/
V
V
V
V
VO3
VO4
3O
4O
4O
3O
4O
3O
4O
No.3806–10/11
Page 11
LA7451M
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 October, 2000. Specifications and information herein are subject
to change without notice.
PS No.3806–11/11
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