The 2N2907 is a commonly available
PNP bipolar junction transistor
A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor, uses only one kind of charge carrier. A bipolar ...
used for general purpose low-power
amplifying or switching applications. It is designed for low to medium
current
Currents, Current or The Current may refer to:
Science and technology
* Current (fluid), the flow of a liquid or a gas
** Air current, a flow of air
** Ocean current, a current in the ocean
*** Rip current, a kind of water current
** Current (stre ...
, low
power
Power most often refers to:
* Power (physics), meaning "rate of doing work"
** Engine power, the power put out by an engine
** Electric power
* Power (social and political), the ability to influence people or events
** Abusive power
Power may a ...
, medium
voltage
Voltage, also known as electric pressure, electric tension, or (electric) potential difference, is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to m ...
, and can operate at moderately high speeds. This transistor was made by several manufacturers;
Texas Instruments
Texas Instruments Incorporated (TI) is an American technology company headquartered in Dallas, Texas, that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globall ...
released a data sheet for their version of this part dated March 1973. An "A" suffix indicates a slightly higher breakdown voltage. These transistors have an enduring popularity with electronics hobbyists.
Specifications
It is a 0.6-
ampere
The ampere (, ; symbol: A), often shortened to amp,SI supports only the use of symbols and deprecates the use of abbreviations for units. is the unit of electric current in the International System of Units (SI). One ampere is equal to elect ...
, 60-
volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827).
Defi ...
, 400-milli
watt
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Wa ...
transistor. For the 2N2907, the gain–bandwidth product under specified test conditions, or , is 200
Megahertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or Cycle per second, cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, me ...
, which is notionally the frequency at which the current gain drops to one. Practical use of a transistor requires that it be used for frequencies much less than . At low frequencies, the current gain (beta) is at least 100. The 2N2907 is used in a variety of analog amplification and switching applications.
Part numbers
The 2N2907 (PNP) and
2N2222
The 2N2222 is a common NPN bipolar junction transistor (BJT) used for general purpose low-power amplifying or switching applications. It is designed for low to medium current, low power, medium voltage, and can operate at moderately high spee ...
(NPN) are complementary transistor pairs.
Other types of transistors with different properties and connections have different part numbers. The prefix of each part number varies for each physical package type.
Important: Pin arrangements for plastic 2N2907 and PN2907 are different; Collector and Emitter are swapped with respect to the flat side of the package.
See also
*
2N3904
*
2N3906
*
2N3055 The 2N3055 is a silicon NPN power transistor intended for general purpose applications. It was introduced in the early 1960s by RCA using a hometaxial power transistor process, transitioned to an epitaxial base in the mid-1970s. Its numbering fo ...
*
BC108
*
BC548
The BC548 is a general-purpose NPN bipolar junction transistor commonly used in European and American electronic equipment. It is notably often the first type of bipolar transistor hobbyists encounter and is often featured in designs in hobby elec ...
*
KT315
The KT315 is a Soviet silicon NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications, enclosed in the plastic KT-13 package. It was widely used in Soviet electronic equipment.
The KT361 is a co ...
References
Further reading
;Historical Databooks
Small-Signal Semiconductors Data Book 1218 pages, 1987, Motorola.
Semiconductor Data Book 916 pages, 1965, Motorola.
Transistor and Diode Data Book 1236 pages, 1973, Texas Instruments.
External links
{{commons category
Datasheet for Fairchild Semiconductor's equivalent PN2907 (PDF)
Commercial transistors
Bipolar transistors
da:2N2222-familien