2N4856A/4857A/4858A
Vishay Siliconix
N-Channel JFETs
PRODUCT SUMMARY
Part
Number
2N4856A
2N4857A
2N4858A
V
GS(off)
(V)
–4 to –10
–2 to –6
–0.8 to –4
V
(BR)GSS
Min (V)
–40
–40
–40
I
DSS
Min
(mA)
50
20
8
r
DS(on)
Max
(W)
25
40
60
I
D(off)
Typ
(pA)
5
5
5
t
ON
Typ
(ns)
4
4
4
FEATURES
D
Low On-Resistance: 2N4856A
<25
W
D
Fast Switching—t
ON
: 4 ns
D
High Off-Isolation—I
D(off)
: 5 pA
D
Low Capacitance: 3 pF
D
Low Insertion Loss
BENEFITS
D
D
D
D
D
Low Error Voltage
High-Speed Analog Circuit Performance
Negligible “Off-Error,” Excellent Accuracy
Good Frequency Response
Eliminates Additional Buffering
APPLICATIONS
D
D
D
D
D
Analog Switches
Choppers
Sample-and-Hold
Normally “On” Switches
Current Limiters
DESCRIPTION
The 2N4856A/4857A/4858A 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 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
Top View
3
G and Case
Document Number: 70243
S-04028—Rev. D, 04-Jun-01
www.vishay.com
7-1
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