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

30

---

V dc

30

---

V dc

3.0

---

V dc

---

0.1

µA

20

150

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Electrical Characteristics

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%.