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.
N-Channel Junction FET
Capacitor Microphone Applications
Ordering number:EN4178A
2SK1578
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
4.0
0.4
0.5
0.4
0.6
15.0
3.0
1.8
123
2.2
0.4
1.3
1.3
3.0
3.8nom
0.7
0.7
Features
· Especially suited for use in audio, telephone capacitor microphones.
· Excellent voltage characteristics.
· Excellent transient characteristics.
· Adoption of FBET process.
Specifications
Absolute Maximum Ratings at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatloVniarD-ot-etaGV
tnerruCetaGI
tnerruCniarDI
noitapissiDrewoPelbawollAP
erutarepmeTlennahCjT 051
erutarepmeTegarotSgtsT 051+ot55–
ODG
G
D
D
Package Dimensions
unit:mm
2034A
[2SK1578]
1 : Source
2 : Gate
3 : Drain
SANYO : SPA
02–V
01Am
1Am
001Wm
˚C
˚C
Electrical Characteristics at Ta = 25˚C
retemaraPlobmySsnoitidnoC
egatloVnwodkaerBniarD-ot-etaGV
egatloVffotuCV
tnerruCniarDegaltoVetaG-oreZI
ecnattimdArefsnarTdrawroF|sfy|VSDV,V5=
ecnaticapaCtupnIssiCVSDV,V5=
ecnaticapaCrefsnarTesreveRssrCVSDV,V5=
* : The 2SK1578 is classified by I
071A001042B051053C012084D023008E044
as follows : (unit : µA)
DSS
I
ODG)RB(
V
)ffo(SG
V
SSD
Aµ001–=02–V
G
I,V5=
SD
SD
Aµ1=2.0–6.0–5.1–V
D
V,V5=
0=*001*008Aµ
SG
SG
SG
SG
zHM1=f,0=4.02.1Sm
zHM1=f,0=1.4Fp
zHM1=f,0=88.0Fp
61599TH (KT)/72297TS (KOTO)/12094TH (KOTO) 8-7215 No.4178–1/4
sgnitaR
nimpytxam
tinU
Page 2
2SK1578
retemaraPlobmySsnoitidnoC
[Ta=25°C, VCC=4.5V, RL=1kΩ, CIN=15pF, See specified Test Circuit.]
niaGegatloVG
scitsiretcarahCegatloVdecudeR
scitsiretcarahCycneuqerF
ecnatsiseRtupnIZ
ecnatsiseRtuptuOZ
noitrotsiDcinomraHlatoTDHTV
egatloVesioNtuptuOV
∆G
∆G
V
VV
fV
NI
O
ON
Test Circuit
sgnitaR
nimpytxam
V
NI
V
NI
zHk1=f52mΩ
zHk1=f 007
NI
V
NI
zHk1=f,Vm01=0.3–Bd
V,zHk1=f,Vm01=
5.4= → V5.12.1–5.3–Bd
CC
zH011otzHk1=f 0.1–Bd
zHk1=f,Vm01=0.1%
evrucA,0= 011–Bd
tinU
Ω
No.4178–2/4
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2SK1578
No.4178–3/4
Page 4
2SK1578
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 June, 1999. Specifications and information herein are subject to
change without notice.
PS No.4178–4/4
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