DATA SHEET
CM4957
PNP HIGH FREQUENCY SILICON TRANSISTOR
TO-72 CASE
DESCRIPTION The CENTRAL SEMICONDUCTOR CM4957 is a Si...
DATA SHEET
CM4957
PNP HIGH FREQUENCY SILICON
TRANSISTOR
TO-72 CASE
DESCRIPTION The CENTRAL SEMICONDUCTOR CM4957 is a Silicon
PNP RF
Transistor, mounted in a hermetically sealed package, designed for high frequency amplifier and non-saturated switching applications. This device is a replacement for the 2N4957.
MAXIMUM RATINGS (TA=25°C)
Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current - Continuous Power Dissipation Power Dissipation (TC=25°C) Operating and Storage Junction Temperature
SYMBOL VCBO VCEO VEBO
IC PD PD
TJ,Tstg
30 25 3.0 30 200 300
-65 to +200
UNITS V V V
mA mW mW
°C
ELECTRICAL CHARACTERISTICS (TA=25°C unless otherwise noted)
SYMBOL ICBO BVCBO BVCEO BVEBO hFE fT Ccb hfe Gpe
TEST CONDITIONS VCB=10V IC=100µA IC=1.0mA IE=100µA VCE=10V, IC=2.0mA VCE=10V, IC=2.0mA, f=100MHz VCB=10V, IE=0, f=1.0MHz VCE=10V, IC=2.0mA, f=1.0kHz VCE=10V, IC=4.0mA, f=450MHz
MIN TYP MAX 100
30
25
3.0
20 150
1200
2500
1.6 2.0
20 200
17 25
UNITS nA V V V
MHz pF
dB
(Continued)
R2
CM4957
PNP HIGH FREQUENCY
TRANSISTOR
TO-72 CASE - MECHANICAL OUTLINE
A B
C
D E
F
LEAD #2 LEAD #1
J 45°
G H
LEAD #3 LEAD #4
K
R1
SYMBOL A (DIA) B (DIA) C D E F (DIA) G (DIA) H J K
DIMENSIONS
INCHES MILLIMETERS
MIN MAX MIN MAX
0.209 0.230 5.31 5.84
0.175 0.195 4.45 4.95
- 0.030 -
0.76
0.170 0.210 4.32 5.33
0.500 - 12.70 -
0.016 0.019 0.41 0.48
0.100
2.54
0.050
1.27
0.036 0.046 0.91 1.17
0.028 0.048 0.71 1.22
TO-72 (REV: R1)
Lead Code: 1) ...