U1898 Datasheet PDF - Fairchild Semiconductor

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U1898
Fairchild Semiconductor

Part Number U1898
Description N-Channel Switch
Page 3 Pages


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U1898
N-Channel Switch
• This device is designed for low level analog switching, sample and
hold circuits and chopper stabalized amplifiers.
• Sourced from Process 51.
• See J111 for characteristics.
1 TO-92
1. Drain 2. Source 3. Gate
Absolute Maximum Ratings* Ta=25°C unless otherwise noted
Symbol
Parameter
VDG Drain-Gate Voltage
VGS Gate-Source Voltage
IGF Forward Gate Current
TJ, TSTG
Operating and Storage Junction Temperature Range
* This ratings are limiting values above which the serviceability of any semiconductor device may be impaired.
Ratings
40
-40
50
-55 ~ 150
NOTES:
1) These rating are based on a maximum junction temperature of 150 degrees C.
2) These are steady limits. The factory should be consulted on applications involving pulsed or low duty cycle operations.
Units
V
V
mA
°C
Electrical Characteristics Ta=25°C unless otherwise noted
Symbol
Parameter
Test Condition
Off Characteristics
V(BR)GS
Gate-Source Breakdown Voltage
VGS(off)
Gate-Source Cutoff Voltage
IDGO
Drain-Gate Leakage Current
On Characteristics
IG = 1.0 µA, VDS = 0
VDS = 20 V, ID = 1.0 nA
VDG = 20 V, IS = 0
IDSS
Zero-Gate Voltage Drain Current *
rDS(on)
Small Signal Characteristics
VDS = 20 V, VGS = 0
ID = 1.0 mA, VGS = 0
rds(on)
Drain-Source On Resistance
Ciss Input Capacitance
Crss Reverse Transfer Capacitance
Switching Characteristics
VDS = VGS = 0, f= 1.0 kHz
VDS = 20, VGS = 0, f = 1.0 MHz
VGS = - 20 V, f = 1.0 MHz
ton Turn-On Time
toff Turn-Off Time
* Pulse Test: Pulse Width 300 µs, Duty Cycle 2.0%
ID(on) = 6.0 mA
VGS(off) = 6.0 V
Min.
-40
-2.0
15
Max.
-7.0
-200
50
50
16
5.0
35
60
Units
V
V
pA
mA
pF
pF
ns
ns
Thermal Characteristics Ta=25°C unless otherwise noted
Symbol
Parameter
PD Total Device Dissipation
Derate above 25°C
RθJC
RθJA
Thermal Resistance, Junction to Case
Thermal Resistance, Junction to Ambient
Max.
625
5.0
125
357
Units
mW
mW/°C
°C/W
°C/W
©2004 Fairchild Semiconductor Corporation
Rev. A, April 2004



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Package Dimensions
TO-92
4.58
+0.25
–0.15
0.46 ±0.10
1.27TYP
[1.27 ±0.20]
1.27TYP
[1.27 ±0.20]
3.60 ±0.20
(R2.29)
0.38
+0.10
–0.05
©2004 Fairchild Semiconductor Corporation
Dimensions in Millimeters
Rev. A, April 2004



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DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR
CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
2. A critical component is any component of a life support
device or system whose failure to perform can be
or (b) support or sustain life, or (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
result in significant injury to the user.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Advance Information
Preliminary
No Identification Needed
Product Status
Formative or In
Design
First Production
Full Production
Definition
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Obsolete
Not In Production
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
©2004 Fairchild Semiconductor Corporation
Rev. I10



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