October 2009 Doc ID 12563 Rev 2 1/14
14
BAS70
Low capacitance, low series inductance and resistance Schottky diodes
Features
■Very low conduction losses
■Negligible switching losses
■Low forward and reverse recovery times
■Surface mount device
■Low capacitance diode
■Low resistance and inductance
Description
The BAS70 series uses 70 V Schottky barrier
diodes packaged in SOD-123, SOD-323, SOD-
523, SOT-23, SOT-323, SOT-323-6L or SOT-666.
These diodes are specially suited for signal
detection and temperature compensation in RF
applications.
Table 1. Device summary
Symbol Value
IF70 mA
VRRM 70 V
C (max) 2 pF
Tj (max) 150 °C
SOD-323
SOD-523
SOT-23
SOT-666
BAS70JFILM
(Single)
BAS70KFILM
(Single)
BAS70FILM
(Single)
BAS70-04FILM
(Series)
BAS70-05FILM
(Common cathode)
BAS70WFILM
(Single)
BAS70-05WFILM
(Common cathode)
BAS70-06WFILM
(Common anode)
BAS70-04WFILM
(Series)
BAS70-07P6FILM
(2 parallel diodes)
BAS70-08SFILM
(3 parallel diodes)
BAS70-09P6FILM
(2 opposite diodes)
BAS70-06FILM
(Common anode)
SOT-323
SOT-323-6L
Configurations in top view
SOD-123
BAS70ZFILM
(Single)
www.st.com
Characteristics BAS70
2/14 Doc ID 12563 Rev 2
1 Characteristics
Table 2. Absolute ratings (limiting values at Tj = 25 °C, unless otherwise specified)
Symbol Parameter Value Unit
VRRM Repetitive peak reverse voltage 70 V
IFContinuous forward current 70 mA
IFSM Surge non repetitive forward current tp = 10 ms Sinusoidal 1 A
Tstg Storage temperature range - 65 to +150 °C
TjMaximum operating junction temperature 150 °C
TLMaximum soldering temperature 260 °C
Table 3. Thermal parameters
Symbol Parameter Value Unit
Rth(j-a) Junction to ambient(1)
1. Epoxy printed circuit board with recommended pad layout
SOD-123, SOT-23 500
°C/WSOT-323, SOD-323 550
SOD-523, SOT-666 600
Table 4. Static electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
IR(1)
1. Pulse test: tp = 5 ms, δ < 2 %
Reverse leakage current Tj = 25 °C VR = 50 V 100 nA
VR = 70 V 10 µA
VF(2)
2. Pulse test: tp = 380 µs, δ < 2 %
Forward voltage drop Tj = 25 °C
IF = 1 mA 410
mVIF = 10 mA 750
IF = 15 mA 1000
Table 5. Dynamic characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
C Diode capacitance VR = 0 V, F = 1 MHz 2 pF
RF
Differential forward
resistance IF = 10 mA, F = 100 MHz 30 Ω
LSSeries inductance 1.5 nH
BAS70 Characteristics
Doc ID 12563 Rev 2 3/14
Figure 1. Average forward power dissipation
versus average forward current
Figure 2. Average forward current versus
ambient temperature (δ = 1)
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10
d=0.05 d=0.1 d=0.2 d=0.5 d=1
T
d=tp/T tp
P(W)
IF(AV)(A)
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0 25 50 75 100 125 150
I
F(AV)
(A)
T
d
=tp/T tp Tamb(°C)
Figure 3. Reverse leakage current versus
reverse applied voltage
(typical values)
Figure 4. Reverse leakage current versus
junction temperature
(typical values)
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0 10203040506070
I
R
(µA)
Tj=150 °C
Tj=85 °C
Tj=25 °C
VR(V) 1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0 25 50 75 100 125 150
I
R
(µA)
VR=50 V
Tj(°C)
Figure 5. Junction capacitance versus
reverse applied voltage
(typical values)
Figure 6. Forward voltage drop versus
forward current (typical values)
0.1
1.0
10.0
0.1 1.0 10.0 100.0
C(pF)
F=1 MHz
VOSC=30 mVRMS
Tj=25 °C
VR(V) 1.E-01
1.E+00
1.E+01
1.E+02
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
I
FM
(mA)
Tj=85°CTj=85°C
Tj=-40 °CTj=-40 °C
Tj=150 °C
VFM(V)
Characteristics BAS70
4/14 Doc ID 12563 Rev 2
Figure 7. Forward voltage drop versus
forward current (typical values)
Figure 8. Differential forward resistance
versus forward current
(typical values)
1.E-01
1.E+00
1.E+01
1.E+02
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
I
FM
(mA)
Tj=125 °C
Tj=25 °C
VFM(V)
10
100
1000
0.1 1.0 10.0
F=100 MHz
Tj=25 °C
R()
FΩ
IF(mA)
Figure 9. Relative variation of thermal
impedance junction to ambient
versus pulse duration
Figure 10. Relative variation of thermal
impedance junction to ambient
versus pulse duration
10
100
1000
1.E-02 1.E-01 1.E+00 1.E+01 1.E+02
Z
th(j-a)
(°C/W)
Single pulse
SOT-323-6L
t
P
(s)
printed circuit board, epoxy FR4 e = 35 µm SOT-323-6L
CU
0.01
0.10
1.00
1.E-02 1.E-01 1.E+00 1.E+01 1.E+0
2
Z
th(j-a)
/R
th(j-a)
Single pulse
SOT-23
Aluminesubstrate
10 x 8 x 0.5 mm
t
P
(s)
alluminium oxide substrate 10 x 8 x 0.5 mm SOT-23
Figure 11. Relative variation of thermal
impedance junction to ambient
versus pulse duration
Figure 12. Relative variation of thermal
impedance junction to ambient
versus pulse duration
0.01
0.10
1.00
1.E-02 1.E-01 1.E+00 1.E+01 1.E+02
Z
th(j-a)
/R
th(j-a)
Single pulse
SOD-323
EpoxyFR4
S
CU
=2.25 mm²
e
CU
=35 µm
t
P
(s)
printed circuit board, epoxy FR4 e = 35 µm SOD-323
CU
0.01
0.10
1.00
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01
Z
th(j-a)
/R
th(j-a)
Single pulse
SOT-666
Epoxy FR4
e
CU
=35 µm
t
P
(s)
printed circuit board, epoxy FR4 e = 35 µm SOT-666
CU
BAS70 Ordering information scheme
Doc ID 12563 Rev 2 5/14
2 Ordering information scheme
Figure 15. Ordering information scheme
Figure 13. Relative variation of thermal
impedance junction to ambient
versus pulse duration
Figure 14. Thermal impedance junction to
ambient versus copper surface
under each lead
0.00
0.01
0.10
1.00
1.E-03 1.E-02 1.E-01 1.E+00 1.E+01
Z
th(j-a)
/R
th(j-a)
Single pulse
SOD-523
EpoxyFR4
e
CU
=35 µm
t
P
(s)
printed circuit board, epoxy FR4 e = 35 µm SOD-523
CU
300
350
400
450
500
550
600
0 5 10 15 20 25 30 35 40 45 50
R
th(j-a)
(°C/W)
SCU(mm²)
printed circuit board, epoxy FR4 e = 35 µm SOD-323
CU
BAS70 xx xx FILM
Signal Schottky diodes
Package
Packing
V=70V
RRM
No letter = Single diode
05 = Common cathode
07 = 2 Parallel diodes
09 = 2 Opposite diodes
04 = Series diodes
06 = Common anode
08 = 3 Parallel diodes
Blank = SOT-23
S = SOT323-6L
Z = SOD-123
J = SOD-323
W = SOT-323
K = SOD-523
P6 = SOT-666
FILM = Tape and reel
Configuration
Package information BAS70
6/14 Doc ID 12563 Rev 2
3 Package information
●Epoxy meets UL94, V0
●Lead-free packages
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 16. SOD-123 footprint (dimensions in mm)
Table 6. SOD-123 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 1.45 0.057
A1 0 0.1 0 0.004
A2 0.85 1.35 0.033 0.053
b 0.55 Typ. 0.022 Typ.
c 0.15 Typ. 0.039 Typ.
D 2.55 2.85 0.1 0.112
E 1.4 1.7 0.055 0.067
G0.25 0.01
H 3.55 3.95 0.14 0.156
H
b
D
E
A1
A2
A
G
c
4.45
0.65
2.510.97 0.97
BAS70 Package information
Doc ID 12563 Rev 2 7/14
Figure 17. SOD-323 footprint (dimensions in mm)
Table 7. SOD-323 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 1.17 0.046
A1 0 0.1 0 0.004
b 0.25 0.44 0.01 0.017
c 0.1 0.25 0.004 0.01
D 1.52 1.8 0.06 0.071
E 1.11 1.45 0.044 0.057
H 2.3 2.7 0.09 0.106
L 0.1 0.46 0.004 0.02
Q1 0.1 0.41 0.004 0.016
H
b
D
E
A1
A
L
Q1
c
3.20
0.54
1.081.06 1.06
Package information BAS70
8/14 Doc ID 12563 Rev 2
Figure 18. SOD-523 footprint (dimensions in mm)
Table 8. SOD-523 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.50 0.60 0.70 0.020 0.024 0.028
E 1.50 1.60 1.70 0.059 0.063 0.067
E1 1.10 1.20 1.30 0.043 0.047 0.051
D 0.70 0.80 0.90 0.028 0.031 0.035
b 0.25 0.35 0.010 0.014
c 0.07 0.20 0.003 0.008
L 0.15 0.20 0.25 0.006 0.008 0.010
L1 0.05 0.20 0.002 0.008
E1
2xb
SEATING PLANE
R0.1
c
8°
7°
L
D
E0.15
0.20
C
C
A
A
B
B
B
A
C
A
L1
M
M
0.7
0.3
2
BAS70 Package information
Doc ID 12563 Rev 2 9/14
Figure 19. SOT-23 footprint (dimensions in mm)
Table 9. SOT-23 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 0.89 1.4 0.035 0.055
A1 0 0.1 0 0.004
B 0.3 0.51 0.012 0.02
c 0.085 0.18 0.003 0.007
D 2.75 3.04 0.108 0.12
e 0.85 1.05 0.033 0.041
e1 1.7 2.1 0.067 0.083
E 1.2 1.6 0.047 0.063
H 2.1 2.75 0.083 0.108
L 0.6 typ. 0.024 typ.
S 0.35 0.65 0.014 0.026
A1
A
L
H
B
E
D
e
e1
S
c
0.95 0.61
1.26
3.25
0.73
Package information BAS70
10/14 Doc ID 12563 Rev 2
Figure 20. SOT-323 footprint (dimensions in mm)
Table 10. SOT-323 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.8 1.1 0.031 0.043
A1 0.0 0.1 0.0 0.004
b 0.25 0.4 0.010 0.016
c 0.1 0.26 0.004 0.010
D 1.8 2.0 2.2 0.071 0.079 0.086
E 1.15 1.25 1.35 0.045 0.049 0.053
e 0.65 0.026
H 1.8 2.1 2.4 0.071 0.083 0.094
L 0.1 0.2 0.3 0.004 0.008 0.012
q 0 30° 0 30°
A1
A
L
H
c
b
E
D
e
θ
0.95
1.0 2.9
0.500.8
BAS70 Package information
Doc ID 12563 Rev 2 11/14
Figure 21. SOT323-6L footprint (dimensions in mm)
Table 11. SOT323-6L dimensions
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 0.8 1.1 0.031 0.043
A1 0 0.1 0 0.004
A2 0.8 1 0.031 0.039
b 0.15 0.3 0.006 0.012
c 0.1 0.18 0.004 0.007
D 1.8 2.2 0.071 0.086
E 1.15 1.35 0.045 0.053
e 0.65 Typ. 0.025 Typ.
H 1.8 2.4 0.071 0.094
Q 0.1 0.4 0.004 0.016
A1
A2
A
L
HE
c
Q1
b
E
D
e
e
0.65
0.80
1.05
1.05
2.9
0.40
Package information BAS70
12/14 Doc ID 12563 Rev 2
Figure 22. SOT-666 footprint (dimensions in mm)
Table 12. SOT-666 dimensions
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 0.45 0.60 0.018 0.024
A3 0.08 0.18 0.003 0.007
b 0.17 0.34 0.007 0.013
b1 0.19 0.27 0.34 0.007 0.011 0.013
D 1.50 1.70 0.059 0.067
E 1.50 1.70 0.059 0.067
E1 1.10 1.30 0.043 0.051
e0.50 0.020
L1 0.19 0.007
L2 0.10 0.30 0.004 0.012
L3 0.10 0.004
D
b
L3
L1
e
b1
E1
L2
E
A
A3
0.50
2.60
0.62
0.30
0.99
BAS70 Ordering information
Doc ID 12563 Rev 2 13/14
4 Ordering information
5 Revision history
Table 13. Ordering information
Order code Marking Package Weight Base qty Delivery mode
BAS70ZFILM Z70 SOD-123 10 mg 3000 Tape and reel
BAS70FILM D76 SOT-23 Single 10 mg 3000 Tape and reel
BAS70-04FILM D96 SOT-23 Series 10 mg 3000 Tape and reel
BAS70-05FILM D97 SOT-23
Common cathode 10 mg 3000 Tape and reel
BAS70-06FILM D98 SOT-23
Common anode 10 mg 3000 Tape and reel
BAS70WFILM D28 SOT-323 Single 6 mg 3000 Tape and reel
BAS70-04WFILM D31 SOT-323 Series 6 mg 3000 Tape and reel
BAS70-05WFILM D30 SOT-323
Common cathode 6 mg 3000 Tape and reel
BAS70-06WFILM D29 SOT-323
Common anode 6 mg 3000 Tape and reel
BAS70-08SFILM D33 SOT323-6L 3 Parallel 6 mg 3000 Tape and reel
BAS70JFILM 76 SOD-323 5 mg 3000 Tape and reel
BAS70KFILM 76 SOD-523 1.4 mg 3000 Tape and reel
BAS70-07P6FILM P7 SOT-666 2 Parallel 2.9 mg 3000 Tape and reel
BAS70-09P6FILM Q7 SOT-666 2 Opposite 2.9 mg 3000 Tape and reel
Table 14. Document revision history
Date Revision Changes
24-Jul-2006 1 BAS70J / W datasheets merged. ECOPACK statement added. SOD-
523 and SOT-666 packages added.
12-Oct-2009 2 Updated Table 8 quote “L1” from 0.10 to 0.05.
BAS70
14/14 Doc ID 12563 Rev 2
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