Small Signal Switching Diodes
CDST-99-G/70-G/56-G
Reverse Voltage: 70 Volts
Forward Current: 200 mA
RoHS Device
Features
-Design for mounting on small surface.
-High speed switching.
-High mounting capability, strong surge
withstand, high reliability.
SOT-23
0.119(3.00)
0.110(2.80)
3
0.056(1.40)
0.047(1.20)
Mechanical data
-Case: SOT-23, molded plastic.
-Terminals: solderable per MIL-STD-750,
method 2026.
-Approx. weight: 0.0078 grams
1
0.079(2.00)
0.071(1.80)
2
0.006(0.15)
0.002(0.05)
0.041(1.05)
0.035(0.90)
0.100(2.55)
0.089(2.25)
Circuit diagram
3
3
3
1
2
1
2
1
2
0.004(0.10) max
0.020(0.50)
0.012(0.30)
0.008(0.20) min
CDST-99-G
Marking Code: A7
CDST-70-G
Marking Code: A4
CDST-56-G
Marking Code: A1
Dimensions in inches and (millimeter)
Maximum Ratings
(at Ta=25°C unless otherwise noted)
Parameter
Reverse voltage
Forward current
Peak surge forward current
Power dissipation
Thermal resistance, junction to ambient
Maximum junction temperature
Storage temperature
Symbol
V
R
I
F
I
FSM
P
D
R
θJA
T
J
T
STG
Value
70
200
500
225
556
150
-55 to +150
Units
V
mA
mA
mW
°C/W
°C
°C
Electrical Characteristics
(at Ta=25°C unless otherwise noted)
Parameter
Reverse breakdown voltage
Symbol
V
BR
Conditions
I
R
=100μA
@I
F
=1mA
@I
F
=10mA
@I
F
=50mA
@I
F
=150mA
@V
R
=70V
I
F
=I
R
=10mA, Irr=0.1×I
R
,
R
L
=100Ω
V
R
=0V, f=1.0MHz
Min.
70
0.715
0.855
1.0
1.25
2.5
6
1.5
Max.
Units
V
Forward voltage
V
F
V
Reverse current
Reverse recovery time
Diode capacitance
I
R
t
rr
C
T
μA
nS
pF
REV:E
QW-B0002
Page 1
Comchip Technology CO., LTD.
Small Signal Switching Diodes
RATING AND CHARACTERISTIC CURVES (CDST-99-G/70-G/56-G)
Fig.1 - Forward Characteristics
1000
10μ
Fig.2 - Reverse Characteristics
Forward Current, (mA)
1μ
T
A
=150°C
T
A
=125°C
T
A
=-40°C
T
A
=75°C
Reverse Current, (A)
100
100n
T
A
=75°C
10
T
A
=0°C
10n
T
A
=25°C
T
A
=0°C
1
T
A
=25°C
1n
T
A
=-40°C
0.1
0
0.5
1.0
1.5
0.1n
0
20
40
60
80
100
Forward Voltage, (V)
Reverse Voltage, (V)
Fig.3 - Capacitance Between Terminals
Characteristics
2
400
T
J
=25°C
f=1MHz
Fig.4 - Power Derating Curve
Capacitance Between Teminals, (pF)
Mounted on glass
epoxy PCBs
Power Dissipation, (mW)
300
1
200
100
0
0
10
20
30
40
50
0
0
25
50
75
100
125
150
175
Reverse Voltage, (V)
Ambient Temperature, (°C)
REV:E
QW-B0002
Page 2
Comchip Technology CO., LTD.
Small Signal Switching Diodes
Reel Taping Specification
P
0
P
1
Index hole
d
E
T
F
B
P
A
W
C
12
0
o
D
2
D
1
D
W
1
Trailer
.......
.......
10 pitches (min)
Device
.......
.......
.......
.......
Leader
.......
.......
10 pitches (min)
End
Start
Direction of Feed
SYMBOL
A
3.10
±
0.10
0.122
±
0.004
B
2.85
±
0.10
0.112
±
0.004
C
1.40
±
0.10
0.055
±
0.004
d
1.55
±
0.10
0.061
±
0.004
D
178
±
1.00
7.008
±
0.039
D
1
54.00 (min)
1.969 (min)
D
2
13.00
±
0.20
0.512
±
0.008
SOT-23
(mm)
(inch)
SYMBOL
E
1.75
±
0.10
0.069
±
0.004
F
3.50
±
0.05
0.138
±
0.002
P
4.00
±
0.10
0.157
±
0.004
P
0
4.00
±
0.10
0.157
±
0.004
P
1
2.00
±
0.05
0.079
±
0.002
W
8.00
±
0.30
0.315
±
0.012
W
1
14.40 (max)
0.567 (max)
SOT-23
(mm)
(inch)
REV:E
QW-B0002
Page 3
Comchip Technology CO., LTD.
Small Signal Switching Diodes
Marking Code
3
Part Number
CDST-99-G
CDST-70-G
CDST-56-G
Marking Code
A7
A4
A1
XX
1
2
xx = Product type marking code
Suggested PAD Layout
SOT-23
SIZE
(mm)
A
B
C
D
0.80
1.90
2.02
2.82
(inch)
0.031
A
C
D
0.075
0.080
0.111
B
Standard Packaging
REEL PACK
Case Type
REEL
( pcs )
Reel Size
(inch)
SOT-23
3,000
7
REV:E
QW-B0002
Page 4
Comchip Technology CO., LTD.
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