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 kÅ min.
Backside Au - 6.5 kÅ 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
BVCEO IC = 1.0 mA 30 --- V dc
BVCBO IC = 100 µA 30 --- V dc
BVEBO IE = 100 µA 3.0 --- V dc
ICBO VCB = 10 V dc --- 0.1 µA
hFE VCE = 10 V, IC = 2.0 mA 20 150 ---
Electrical Characteristics
TA = 25
o
C
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%.
