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