BF245A ON Semiconductor, BF245A Datasheet - Page 2

• Manufacturer Part Number: BF245A
• Description: TRANS JFET RF SS N-CH 30V TO-92
• Manufacturer: ON Semiconductor

Specifications of BF245A

• Transistor Type: N-Channel JFET
• Voltage - Rated: 30V
• Current Rating: 100mA
• Package / Case: TO-92-3 (Standard Body), TO-226
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency: -
• Gain: -
• Noise Figure: -
• Current - Test: -
• Voltage - Test: -
• Other names: BF245AOS

3. The frequency at which g fs is 0.7 of its value at 1 kHz.
ELECTRICAL CHARACTERISTICS
SMALL–SIGNAL CHARACTERISTICS
Forward Transfer Admittance
Output Admittance
Forward Transfer Admittance
Reverse Transfer Admittance
Input Capacitance
Reverse Transfer Capacitance
Output Capacitance
Cut–off Frequency (3)
Figure 3. Forward Transadmittance (y fs )
Figure 1. Input Admittance (y is )
Characteristic
(V DS = 20 Vdc, –V GS = 1.0 Vdc, f = 1.0 MHz)
(V DS = 20 Vdc, –V GS = 1.0 Vdc, f = 1.0 MHz)
(T A = 25 C unless otherwise noted) (Continued)
COMMON SOURCE CHARACTERISTICS
(V DS = 15 Vdc, V GS = 0, f = 200 MHz)
(V DS = 15 Vdc, V GS = 0, f = 200 MHz)
(V DS = 15 Vdc, V GS = 0, f = 1.0 kHz)
(V DS = 15 Vdc, V GS = 0, f = 1.0 kHz)
(V DS = 20 Vdc, –V GS = 1.0 Vdc)
(V DS = 15 Vdc, T channel = 25 C)
ADMITTANCE PARAMETERS
BF245A BF245B
(V DS = 15 Vdc, V GS = 0)
http://onsemi.com
2
Figure 2. Reverse Transfer Admittance (y rs )
Symbol
Figure 4. Output Admittance (y os )
F (Yfs)
C oss
C rss
C iss
Y os
Y fs
Y fs
Y rs
Min
3.0
—
—
—
—
—
—
—
Typ
700
5.6
1.0
3.0
0.7
0.9
—
40
Max
6.5
—
—
—
—
—
—
—
mmhos
mmhos
mmhos
mmhos
MHz
Unit
pF
pF
pF