130-28176 Parallax Inc, 130-28176 Datasheet - Page 69

KIT PARTS PROCESS CONTROL

130-28176

Manufacturer Part Number
130-28176
Description
KIT PARTS PROCESS CONTROL
Manufacturer
Parallax Inc
Datasheets

Specifications of 130-28176

Accessory Type
Education Kit
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Board of Education Full Kit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
All devices have limits and specifications for proper operation. Table 3-1 shows the
pertinent specifications for the 2N3904. Some specifications are characteristics of the
device, such as the voltage drop at the base-emitter junction (denoted by “Device” in the
table). For example, the Collector to Emitter voltage drop is typically 0.3 V when current
is flowing.
Other specifications are limitations imposed on the user to prevent damage to the device
(denoted by “Use” in the table). For example, the maximum supply voltage to the device.
Figure 3-11 Transistor Current Flow and Characteristic Curve
(I
values, h
I
Saturation Region: An increase in base current does not change the collector
current. The electronic switch is closed. Resistance in the collector-emitter
circuit limits I
termed saturation current (I
C
B
In keeping with Kirchoff’s Currrent Law (KCL) which states that the algebraic sum of the
currents entering any node is zero:
I
I
= I
) multiplied by a gain factor called Beta (β) or, when dealing with strictly DC
B
E
= I
+ I
B
C
B
x h
+ I
– I
FE
FE
.
E
C
.
= 0
C
. The transistor is in saturation, and the collector current is
SAT
).

Related parts for 130-28176