Sanyo LA7957 Specifications
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
Video Switch for TV/VCR Use
Ordering number:ENN4039
LA7957
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Overview
The LA7957 is an audio video switch for televisions, VCRs
and other video equipment, and for audio and video amplifiers in multimedia equipment.
The LA7957 is ideal for audio and video switching in dualtuner, BS and PIP applications.
The LA7957 operates from a 12V supply and is available
in 20-pin SDIPs.
Features
• Suitable for dual tuner, BS and PIP applications.
• Three video inputs.
• Two video outputs.
• Two stereo audio channels.
• Muting of one audio channel.
• 8.0 to 13.2V supply voltage.
• 20-pin SDIPs.
Specifications
Maximum Ratings at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppuSV
egatlovNIETUMdna2TNOC,1TNOCV
noitapissidrewopelbawollAxamdP 007Wm
erutarepmetgnitarepOrpoT 07+ot02–
erutarepmetegarotSgtsT 521+ot55–
CC
I
Package Dimensions
unit:mm
3021C-DIP20
[LA7957]
24.0
20
1
1.0
(0.57)
2.54
0.5
1.2
11
7.62
10
(3.25)
0.51min
SANYO : DIP20
6.4
0.25
3.9max
3.3
4.41V
4.41V
˚C
˚C
Recommended Operating Conditions at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppuSV
egnaregatlovylppuSV
CC
CC
O2500TN (KT)/5052TS No.4039–1/4
21V
2.31ot0.8V
Operating Characteristics at Ta = 25˚C, VCC=12V
retemaraPlobmySsnoitidnoC
niardtnerruCI
V
Vot1
NI
V
V
V
V
NI
Vdna1
TUO
NI
NI
NI
nloitcejer
egatlov
TUO
Vot1
NI
Vot1
NI
Vot1
Vro3
NI
NI
egatlovsaibtupni3V
egatlovsaibtuputo2V
ecnadepmitupni3Z
niagegatlovlennahc-oediVA
htdiwdnablennahc-oediVWB
egatlovesionlennahc-oediVV
noitcejerklatssorc2TC
Vot2
NI
noitcejermuhlennahc-oediVRH
niagegatlovlennahc-oiduAA
htdiwdnablennahc-oiduAWB
egatlovesionlennahc-oiduAV
egatlovesiontuptuoetuMV
noitcejermuhlennahc-oiduARH
tnerrucegakael1TNOCI
tnerrucegakael2TNOCI
tnerrucegakaelNIETUMI
klatssorc3
saibtupniR2NIAdnaL2NIA,R1NIA,L1NIA
egatlovsaibtuptuo2TUOAdna1TUOAV
ecnadepmitupniR1NIAdnaL1NIAZ
ecnadepmitupniR2NIAdnaL2NIAZ
noitrotsidcinomrahlatotlennahc-oiduADHTV
noitcejerklatssorc2NIAot1NIATC
noitcejerklatssorclennahc-thgirot-tfeLTC
egatlovtupnilevel-HGIH2TNOCdna1TNOCV
egatlovtupnilevel-HGIHNIETUMV
CC
BVI
VO
VI
V
V
VN
1V
TC
2V
V
V
BAI
AO
1AI
2AI
A
A
AN
1A
SA
MAO
A
1HI
1L
2L
2HI
3L
LA7957
sgnitaR
nimpytxam
533475Am
4.47.40.5V
2.88.64.7V
zHk1=f511272kΩ
V,zHk1=f
V
V
V
V
V
V
V
NI
I
I
tniop
57=gR Ω htdiwdnabzHM01,3.00.1smrVm
57=gR Ω zHM85.3=f,5405Bd
57=gR Ω zHM85.3=f,5405Bd
57=gR,zH05=f Ω 8132Bd
zHk1=f748688kΩ
zHk1=f154759kΩ
V,zHk1=f
I
I
I
006=gR Ω zHk02otzH02=f,0105smVµ
k7.4=gR Ω f, ≤ zHk15709Bd
k7.4=gR Ω f, ≤ zHk12728Bd
I
k7.4=gR Ω 0464Bd
V0=3–Aµ
1TNOC
V0=3–Aµ
2TNOC
V0=3–Aµ
NIETUM
Votdetcennoc3
25.01kΩ
NI
zHM1.0=f,evawenisp-pV1=6.51.66.6Bd
Bd3–ehtotzHM1.0,evawenisp-pV7.0=
smrVm005=5.0–20.0–5.0+Bd
tniopBd1–ehtotzHk1,smrVm005=001zHk
zHk1-f,smrVm005=30.02.0%
zHk1=f,smrVm005=20.01.0smrVm
NOetumronepotupnI8293Bd
01zHM
5.41.57.5V
2.38.34.4V
1.14.17.1V
1.14.17.1V
tinU
Pin Assignment
Top view
No.4039–2/4
Loading...