1
Motorola SmallSignal Transistors, FETs and Diodes Device Data
JFET Chopper Transistor
NChannel -- Depletion
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Drain Gate Voltage
VDG
35
Vdc
Gate Source Voltage
VGS
35
Vdc
Gate Current
IG
50
mAdc
Total Device Dissipation @ TA = 25
C
Derate above 25
C
PD
350
2.8
mW
mW/
C
Lead Temperature
TL
300
C
Operating and Storage Junction
Temperature Range
TJ, Tstg
65 to +150
C
ELECTRICAL CHARACTERISTICS
(TA = 25
C unless otherwise noted)
Characteristic
Symbol
Min
Max
Unit
OFF CHARACTERISTICS
Gate Source Breakdown Voltage
(IG = 1.0
Adc)
V(BR)GSS
35
--
Vdc
Gate Reverse Current
(VGS = 15 Vdc)
IGSS
--
1.0
nAdc
Gate Source Cutoff Voltage
(VDS = 5.0 Vdc, ID = 1.0
Adc)
VGS(off)
1.0
5.0
Vdc
DrainCutoff Current
(VDS = 5.0 Vdc, VGS = 10 Vdc)
ID(off)
--
1.0
nAdc
ON CHARACTERISTICS
ZeroGateVoltage Drain Current(1)
(VDS = 15 Vdc)
IDSS
5.0
--
mAdc
Static DrainSource On Resistance
(VDS = 0.1 Vdc)
rDS(on)
--
50
Drain Gate and Source Gate OnCapacitance
(VDS = VGS = 0, f = 1.0 MHz)
Cdg(on)
+
Csg(on)
--
28
pF
Drain Gate OffCapacitance
(VGS = 10 Vdc, f = 1.0 MHz)
Cdg(off)
--
5.0
pF
Source Gate OffCapacitance
(VGS = 10 Vdc, f = 1.0 MHz)
Csg(off)
--
5.0
pF
1. Pulse Width = 300
s, Duty Cycle = 3.0%.
Order this document
by J112/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
J112
CASE 2904, STYLE 5
TO92 (TO226AA)
1
2
3
Motorola, Inc. 1997
1 DRAIN
2 SOURCE
3
GATE
(Replaces J111/D)
J112
2
Motorola SmallSignal Transistors, FETs and Diodes Device Data
TYPICAL SWITCHING CHARACTERISTICS
t f
, F
ALL
TIME
(ns)
t r
, RISE
TIME
(ns)
t d(on)
, TURNON
DELA
Y
TIME (ns)
1000
1.0
2.0
5.0
10
20
50
100
200
500
0.5 0.7 1.0
2.0
3.0
5.0 7.0
10
20
30
50
ID, DRAIN CURRENT (mA)
Figure 1. TurnOn Delay Time
RK = 0
TJ = 25
C
VGS(off) = 7.0 V
RK = RD
1000
1.0
2.0
5.0
10
20
50
100
200
500
0.5 0.7 1.0
2.0
3.0
5.0 7.0
10
20
30
50
ID, DRAIN CURRENT (mA)
Figure 2. Rise Time
RK = RD
RK = 0
TJ = 25
C
VGS(off) = 7.0 V
1000
1.0
2.0
5.0
10
20
50
100
200
500
0.5 0.7 1.0
2.0
3.0
5.0 7.0
10
20
30
50
ID, DRAIN CURRENT (mA)
Figure 3. TurnOff Delay Time
RK = RD
RK = 0
TJ = 25
C
VGS(off) = 7.0 V
t d(of
f)
, TURNOFF DELA
Y
TIME (ns)
1000
1.0
2.0
5.0
10
20
50
100
200
500
0.5 0.7 1.0
2.0
3.0
5.0 7.0
10
20
30
50
ID, DRAIN CURRENT (mA)
Figure 4. Fall Time
RK = RD
RK = 0
TJ = 25
C
VGS(off) = 7.0 V
NOTE 1
The switching characteristics shown above were measured using a
test circuit similar to Figure 5. At the beginning of the switching
interval, the gate voltage is at Gate Supply Voltage (VGG). The
DrainSource Voltage (VDS) is slightly lower than Drain Supply
Voltage (VDD) due to the voltage divider. Thus Reverse Transfer
Capacitance (Crss) or GateDrain Capacitance (Cgd) is charged to
VGG + VDS.
During the turnon interval, GateSource Capacitance (Cgs)
discharges through the series combination of RGen and RK. Cgd
must discharge to VDS(on) through RG and RK in series with the
parallel combination of effective load impedance (R
D) and
DrainSource Resistance (rds). During the turnoff, this charge flow
is reversed.
Predicting turnon time is somewhat difficult as the channel
resistance rds is a function of the gatesource voltage. While Cgs
discharges, VGS approaches zero and rds decreases. Since Cgd
discharges through rds, turnon time is nonlinear. During turnoff,
the situation is reversed with rds increasing as Cgd charges.
The above switching curves show two impedance conditions;
1) RK is equal to RD, which simulates the switching behavior of
cascaded stages where the driving source impedance is normally
the load impedance of the previous stage, and 2) RK = 0 (low
impedance) the driving source impedance is that of the generator.
RGEN
50
VGEN
INPUT
RK
50
RGG
VGG
50
OUTPUT
RD
+VDD
RT
SET VDS(off) = 10 V
INPUT PULSE
tr
tf
PULSE WIDTH
DUTY CYCLE
0.25 ns
0.5 ns
= 2.0
s
2.0%
RGG
&
RK
RD
+
RD(RT
)
50)
RD
)
RT
)
50
Figure 5. Switching Time Test Circuit
J112
3
Motorola SmallSignal Transistors, FETs and Diodes Device Data
r ds(on)
, DRAINSOURCE ONST
A
T
E
RESIST
ANCE (OHMS)
NOTE 2
The ZeroGateVoltage Drain Current (IDSS), is the principle
determinant of other J-FET characteristics. Figure 10 shows
the relationship of GateSource Off Voltage (VGS(off) and
DrainSource On Resistance (rds(on)) to IDSS. Most of the
devices will be within
10% of the values shown in Figure 10.
This data will be useful in predicting the characteristic
variations for a given part number.
For example:
Unknown
rds(on) and VGS range for an J112
The electrical characteristics table indicates that an J112
has an IDSS range of 25 to 75 mA. Figure 10, shows rds(on) =
52 Ohms for IDSS = 25 mA and 30 Ohms for IDSS = 75 mA.
The corresponding VGS values are 2.2 volts and 4.8 volts.
y
fs
, FOR
W
ARD
TRANSFER
ADMITT
ANCE
(mmhos)
C, CAP
ACIT
ANCE
(pF)
r ds(on)
, DRAINSOURCE ONST
A
T
E
RESIST
ANCE (OHMS)
r ds(on)
, DRAINSOURCE ONST
A
T
E
RESIST
ANCE (NORMALIZED)
2.0
3.0
5.0
7.0
10
20
0.5 0.7
1.0
2.0
3.0
5.0 7.0 10
20
30
50
ID, DRAIN CURRENT (mA)
Figure 6. Typical Forward Transfer Admittance
1.0
1.5
2.0
3.0
5.0
7.0
10
15
0.03 0.05
0.1
0.3 0.5
1.0
3.0 5.0
10
30
VR, REVERSE VOLTAGE (VOLTS)
Figure 7. Typical Capacitance
200
160
120
80
40
0
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
VGS, GATESOURCE VOLTAGE (VOLTS)
Figure 8. Effect of GateSource Voltage
On DrainSource Resistance
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
70
40
10
20
50
80
110
140
170
Tchannel, CHANNEL TEMPERATURE (
C)
Figure 9. Effect of Temperature On
DrainSource OnState Resistance
Tchannel = 25
C
VDS = 15 V
Cgs
Cgd
Tchannel = 25
C
(Cds IS NEGLIGIBLE)
IDSS
= 10
mA
25
mA
50 mA
75 mA 100 mA
125 mA
Tchannel = 25
C
ID = 1.0 mA
VGS = 0
10
IDSS, ZEROGATEVOLTAGE DRAIN CURRENT (mA)
Figure 10. Effect of IDSS On DrainSource
Resistance and GateSource Voltage
20 30
40 50 60
70 80 90 100 110 120 130 140 150
10
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
100
90
80
70
60
50
40
30
20
10
0
V
GS
, GA
TESOURCE
VOL
T
AGE
(VOL
TS)
Tchannel = 25
C
rDS(on) @ VGS = 0
VGS(off)
J112
4
Motorola SmallSignal Transistors, FETs and Diodes Device Data
PACKAGE DIMENSIONS
CASE 02904
(TO226AA)
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.
4. DIMENSION F APPLIES BETWEEN P AND L.
DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.
R
A
P
J
L
F
B
K
G
H
SECTION XX
C
V
D
N
N
X X
SEATING
PLANE
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.175
0.205
4.45
5.20
B
0.170
0.210
4.32
5.33
C
0.125
0.165
3.18
4.19
D
0.016
0.022
0.41
0.55
F
0.016
0.019
0.41
0.48
G
0.045
0.055
1.15
1.39
H
0.095
0.105
2.42
2.66
J
0.015
0.020
0.39
0.50
K
0.500
12.70
L
0.250
6.35
N
0.080
0.105
2.04
2.66
P
0.100
2.54
R
0.115
2.93
V
0.135
3.43
1
ISSUE AD
STYLE 5:
PIN 1. DRAIN
2. SOURCE
3. GATE
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J112/D
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