Chip Type 2C4957
Geometry 0006
Polarity PNP
Data Sheet No. 2C4957
Generic Packaged Parts:
2N4957, 2N4958, 2N4959
Chip type 2C4957 by Semicoa Semi-
conductors provides performance
similar to these devices.
Product Summary:
Part Numbers:
2N4957
,
2N4957UB
, 2N4958, 2N4958UB,
2N4959, 2N4959UB, SD4957, SD4957F,
SQ4957, SQ4957F
APPLICATIONS:
Designed for high-gain, low-noise class A
amplifiers, oscillators and mixers.
Features:
Special Characteristics
ft = 1.6 GHz (typ) at 2.0 mA/10V
Radiation graphs available
Top
Al - 12 k min.
Backside
Au - 6.5 k nom.
Emitter
2.3 mils x 2.3 mils
Base
2.3 mils x 2.3 mils
Die Thickness
Chip Area
Top Surface
16 mils x 16 mils
Silox Passivated
Mechanical Specifications
Metallization
Bonding Pad Size
8 mils nominal
Parameter
Test conditions
Min
Max
Unit
BV
CEO
I
C
= 1.0 mA
30
---
V dc
BV
CBO
I
C
= 100 A
30
---
V dc
BV
EBO
I
E
= 100 A
3.0
---
V dc
I
CBO
V
CB
= 10 V dc
---
0.1
A
h
FE
V
CE
= 10 V, I
C
= 2.0 mA
20
150
---
Electrical Characteristics
T
A
= 25
o
C
Due to limitations of probe testing, only dc parameters are tested. This must be done with pulse width less
than 300 s, duty cycle less than 2%.
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