BC857 Datasheet, PDF (3/5 Pages) STMicroelectronics – SMALL SIGNAL PNP TRANSISTORS

BC857/BC858
ELECTRICAL CHARACTERISTICS (Continued)
Symb ol
P a ram et er
Test Conditions
hie
Input Impedance
VCE = -5 V IC = -2 mA
for group A
for group B
f = 1KHz
h_re
Reverse Voltage Ratio V_CE = -5 V I_C = -2 mA f = 1KHz
for group A
for group B
hf e
Small Signal Current VCE = -5 V IC = -2 mA f = 1KHz
Gain
for group A
for group B
h_oe Output Admittance
V_CE = -5 V I_C = -2 mA
for group A
for group B
∗ Pulsed: Pulse duration = 300 µs, duty cycle ≤ 2 %
f = 1KHz
Min. Typ . Max. Un it
1.6
2.7
4.5
KΩ
3.2
4.5
8.5
KΩ
1.5
10^-4
2
10^-4
220
330
18
30
µs
30
60
µs
3/5