2sa1257 ON Semiconductor, 2sa1257 Datasheet - Page 2

• Manufacturer Part Number: 2sa1257
• Description: Pnp/npn Epitaxial Planar Silicon Transistors
• Manufacturer: ON Semiconductor

Continued from preceding page.
Switching Time Test Circuit
G
O
B
C
C
C
E
T
S
F
r u
l l a
a
o
o
o
m
o t
a
u
s
e l l
e l l
e l l
--
--
--
--
--
--
--
--
--
--
n i
p t
t i
- n
a r
- e
i T
50
40
30
20
10
50
40
30
20
10
e t
B -
t u
c
c
c
O
g
0
0
o t
m
o t
o t
o t
- r
0
0
e
a
N
C
E -
o t
- r
- r
- r
e
n
i T
a
i T
d
o t
o t
o t
B -
m
p
m
w
m
a
E -
B -
E -
t t i
a
e
d i
i c
s
e
PW=20μs
D.C.≤1%
r e
m
a
m
h t
INPUT
a t
e
--
s
Collector-to-Emitter Voltage, V CE – V
--
t t i
t t i
e
n
V
B
0.2
P
2
r e
r e
c
Base-to-Emitter Voltage, V BE – V
l o
e r
B
o r
e
P
a t
e r
a
S
B
d
a
k
u
g
t a
a
e r
a r
d
t c
e
k
r u
a
o
m
d
50Ω
--
k
w
o
t e
t a
--
d
0.4
w
n
V R
4
o
r e
o i
n
V
w
--5V
I C -- V CE
n
I C -- V BE
l o
V
n
V
l o
a t
I B1
V
l o
a t
g
l o
a t
R B
I B2
e
--
100μF
g
a t
--
10I B1 =--10I B2 =I C =10mA
0.6
g
(For PNP, the polarity is reversed.)
e
6
g
e
e
+
--
--
0.8
8
470μF
V
V
V
V
B (
B (
B (
S
+
C
20V
y
V E
C
t g t
R
R
R
--
t n
--
E
2SA1257
V CE =--5V
m
s
f T
o
B
t f
2SA1257
o
OUTPUT
1.0
)
)
E )
10
Rev.0 I Page 2 of 4 I www.onsemi.com
s (
C
C
b
b
R L
2kΩ
a
l o
B
E
B
ITR03128
ITR03130
) t
O
O
O
2SA1257/2SC3143
V E
V B
V E
I C
I C
I C
I E
S
S
S
--
--
C
C
C
e
e
e
1.2
=
=
=
=
12
e
e
e
– (
– (
– (
– (
=
=
=
s
s
s
1 )
3 )
1 )
1 )
p
p
p
– (
– (
– (
e
e
e
0
0
0
m
1 )
1 )
5 )
f i c
f i c
f i c
μ
m
μ
, A
0
0
V
A
A
A
e i
e i
e i
V
, V
I ,
I ,
I ,
I ,
R
d
d
d
I ,
C
C 0
E 0
= f
B =∞
B
T
T
T
C
=
=
=
E
=
e
e
e
1
=
– (
t s
t s
t s
– (
M
– (
1 )
H
3 )
i C
i C
i C
1 )
0
z
m
C
c r
c r
c r
0
m
50
40
30
20
10
50
40
30
20
10
o
m
A
u
u
u
A
0
0
n
A
t i
t i
t i
0
0
d
t i
o i
n
s
Collector-to-Emitter Voltage, V CE – V
0.2
2
Base-to-Emitter Voltage, V BE – V
0.4
4
I C -- V CE
I C -- V BE
0.6
6
– (
– (
m
1 )
1 )
– (
n i
8
6
5 )
0
0
R
0.8
8
t a
0 (
0 (
0 (
y t
1 (
(
0
1
0
n i
. 2
1 .
9 .
1 .
1
p
3
2
1 .
0 .
2 .
5
g
) 0
) 4
) 5
) 5
) 5
0 .
0
8
0
0
s
1.0
10
2SC3143
2SC3143
V CE =5V
– (
– (
m
(
a
. 3
1 )
0 )
ITR03129
ITR03131
2
x
) 2
8 .
5 .
7 .
1.2
M
12
U
p
μ
μ
μ
V
V
V
V
V
n
H
F
s
s
s
t i
z