2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
N-Channel JFETs
2N4856JAN
2N4857JAN
2N4858JAN
2N4859JAN
2N4860JAN
2N4861JAN
2N4856JANTX
2N4857JANTX
2N4858JANTX
2N4859JANTX
2N4860JANTX
2N4861JANTX
2N4856JANTXV
2N4857JANTXV
2N4858JANTXV
2N4859JANTXV
2N4860JANTXV
2N4861JANTXV
PRODUCT SUMMARY
Part Number
2N4856
2N4857
2N4858
2N4859
2N4860
2N4861
V
GS(off)
(V)
–4 to –10
–2 to –6
–0.8 to –4
–4 to –10
–2 to –6
–0.8 to –4
V
(BR)GSS
Min (V)
–40
–40
–40
–30
–30
–30
r
DS(on)
Max (W)
25
40
60
25
40
60
I
D(off)
Max (pA)
250
250
250
250
250
250
t
ON
Typ (ns)
9
10
20
9
10
20
FEATURES
D
D
D
D
D
D
Low On-Resistance: 2N4856 <25
W
Fast Switching—t
ON
: 4 ns
High Off-Isolation—I
D(off)
: 5 pA
Low Capacitance: 3 pF
Low Insertion Loss
N-Channel Majority Carrier FET
BENEFITS
D
D
D
D
D
D
Low Error Voltage
High-Speed Analog Circuit Performance
Negligible “Off-Error,” Excellent Accuracy
Good Frequency Response, Low Glitches
Eliminates Additional Buffering
High Radiation Tolerance
APPLICATIONS
D
D
D
D
D
Analog Switches
Choppers
Sample-and-Hold
Normally “On” Switches
Current Limiters
DESCRIPTION
The 2N4856JAN/JANTX/JANTXV all-purpose JFET analog
switches offer low on-resistance, low capacitance, good
isolation, and fast switching.
Hermetically-sealed TO-206AA (TO-18) packaging allows full
military processing (see Military Information). For similar
products in TO-226AA (TO-92) and TO-236 (SOT-23)
packages, see the J/SST111 series data sheet. For similar
duals, see the 2N5564/5565/5566 data sheet.
TO-206AA
(TO-18)
S
1
2
D
3
G and Case
Top View
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
www.vishay.com
7-1
2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Gate-Drain, Gate-Source Voltage :
(2N4856-58) . . . . . . . . . . . . . . . . . . . . . . . –40 V
(2N4859-61) . . . . . . . . . . . . . . . . . . . . . . . –30 V
Gate Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Lead Temperature (
1
/
16
” from case for 10 seconds) . . . . . . . . . . . . . . 300
_C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65 to 200_C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . –65 to 200_C
Power Dissipation
a
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1800 mW
Notes
a. Derate 10.3 mW/_C to T
C
> 25_C
SPECIFICATIONS FOR 2N4856, 2N4857 AND 2N4858 (T
A
= 25_C UNLESS NOTED)
Limits
2N4856
2N4857
2N4858
Parameter
Static
Gate-Source
Breakdown Voltage
Gate-Source Cutoff Voltage
Saturation Drain Current
b
Gate Reverse Current
Gate Operating Current
c
Drain Cutoff Current
Symbol
Test Conditions
Typ
a
Min
Max
Min
Max
Min
Max
Unit
V
(BR)GSS
V
GS(off)
I
DSS
I
GSS
I
G
I
D(off)
I
G
= –1
mA
, V
DS
= 0 V
V
DS
= 15 V, I
D
= 0.5 nA
V
DS
= 15 V, V
GS
= 0 V
V
GS
= –20 V, V
DS
= 0 V
T
A
= 150_C
V
DG
= 15 V, I
D
= 10 mA
V
DS
= 15 V, V
GS
= –10 V
T
A
= 150_C
I
D
= 5 mA
–55
–40
–4
50
–10
175
–250
–500
–40
–2
20
–6
100
–250
–500
–40
V
–0.8
8
–4
80
–250
–500
mA
pA
nA
pA
nA
–5
–13
–5
5
13
0.25
0.35
0.5
250
500
250
500
250
500
0.5
Drain-Source On-Voltage
V
DS(on)
V
GS
= 0 V
I
D
= 10 mA
I
D
= 20 mA
0.5
0.75
25
40
60
V
Drain-Source On-Resistance
c
Gate-Source
Forward Voltage
c
r
DS(on)
V
GS(F)
V
GS
= 0 V, I
D
= 1 mA
I
G
= 1 mA , V
DS
= 0 V
0.7
W
V
Dynamic
Common-Source
Forward Transconductance
c
Common-Source
Output Conductance
c
Common-Source
Input Capacitance
Common-Source
Reverse Transfer Capacitance
Equivalent Input
Noise Voltage
c
g
fs
g
os
C
iss
C
rss
e
n
V
DS
= 0 V, V
GS
= –10 V
f = 1 MHz
V
DG
= 20 V, I
D
= 1 mA
f = 1 kHz
6
25
7
3
3
18
8
18
8
18
pF
8
nV⁄
√Hz
mS
mS
V
DG
= 10 V, I
D
= 10 mA
f = 1 kHz
Switching
t
d(on)
Turn-On Time
Turn-Off Time
t
r
t
OFF
V
DD
= 10 V, V
GS(H)
= 0 V
See Switching Circuit
2
2
13
6
3
25
6
4
50
10
10
100
ns
www.vishay.com
7-2
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
SPECIFICATIONS FOR 2N4859, 2N4860 AND 2N4861 (T
A
= 25_C UNLESS NOTED)
Limits
2N4859
2N4860
2N4861
Parameter
Static
Gate-Source
Breakdown Voltage
Gate-Source Cutoff Voltage
Saturation Drain Current
b
Gate Reverse Current
Gate Operating Current
c
Drain Cutoff Current
Symbol
Test Conditions
Typ
a
Min
Max
Min
Max
Min
Max
Unit
V
(BR)GSS
V
GS(off)
I
DSS
I
GSS
I
G
I
D(off)
I
G
= –1
mA
, V
DS
= 0 V
V
DS
= 15 V, I
D
= 0.5 nA
V
DS
= 15 V, V
GS
= 0 V
V
GS
= –15 V, V
DS
= 0 V
T
A
= 150_C
V
DG
= 15 V, I
D
= 10 mA
V
DS
= 15 V, V
GS
= –10 V
T
A
= 150_C
I
D
= 5 mA
–55
–30
–4
50
–10
175
–250
–500
–30
–2
20
–6
100
–250
–500
–30
V
–0.8
8
–4
80
–250
–500
mA
pA
nA
pA
nA
–5
–13
–5
5
13
0.25
0.35
0.5
250
500
250
500
250
500
0.5
Drain-Source On-Voltage
V
DS(on)
V
GS
= 0 V
I
D
= 10 mA
I
D
= 20 mA
0.5
0.75
25
40
60
V
Drain-Source On-Resistance
Gate-Source Forward Voltage
r
DS(on)
V
GS(F)
V
GS
= 0 V, I
D
= 1 mA
I
G
= 1 mA , V
DS
= 0 V
0.7
W
V
Dynamic
Common-Source
Forward Transconductance
c
Common-Source
Output Conductance
c
Common-Source
Input Capacitance
Common-Source
Reverse Transfer Capacitance
Equivalent Input
Noise Voltage
c
g
fs
g
os
C
iss
C
rss
e
n
V
DS
= 0 V, V
GS
= –10 V
f = 1 MHz
V
DG
= 20 V, I
D
= 1 mA
f = 1 kHz
6
25
7
3
3
18
8
18
8
18
pF
8
nV⁄
√Hz
mS
mS
V
DG
= 10 V, I
D
= 10 mA
f = 1 kHz
Switching
t
d(on)
Turn-On Time
Turn-Off Time
t
r
t
OFF
V
DD
= 10 V, V
GS(H)
= 0 V
See Switching Circuit
2
2
19
6
3
25
6
4
50
10
10
100
NCB
ns
Notes
a. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
b. Pulse test: PW
v100
ms
duty cycle
v10%.
c. This parameter not registered with JEDEC.
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
www.vishay.com
7-3
2N4856JAN/JANTX/JANTXV Series
Vishay Siliconix
SWITCHING TIME TEST CIRCUIT
4856/4859
V
GS(L)
R
L
*
I
D(on)
*Non-inductive
–10 V
464
W
20 mA
4857/4860
–6 V
953
W
10 mA
4858/4861
–4 V
1910
W
5 mA
INPUT PULSE
Rise Time < 1 ns
Fall Time < 1 ns
Pulse Width 100 ns
PRF 1 MHz
SAMPLING SCOPE
Rise Time 0.4 ns
Input Resistance 10 MW
Input Capacitance 1.5 pF
INPUT
V
IN
t
OFF
10%
OUTPUT
t
d(on)
90%
t
r
t
r
<20 ns
t
f
<20 ns
V
DD
R
L
OUT
V
GS(H)
V
GS(L)
51
Ω
1 kΩ
V
IN
Scope
51
Ω
www.vishay.com
7-4
Document Number: 70244
S-04028—Rev. C, 04-Jun-01
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
www.vishay.com
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