Part Details for BF257 by STMicroelectronics
Results Overview of BF257 by STMicroelectronics
- Distributor Offerings: (0 listings)
- Number of FFF Equivalents: (0 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (0 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Consumer Electronics
Security and Surveillance
Internet of Things (IoT)
Space Technology
Environmental Monitoring
Audio and Video Systems
Computing and Data Storage
Financial Technology (Fintech)
Smart Cities
Telecommunications
Communication and Networking
Automotive
BF257 Information
BF257 by STMicroelectronics is a Small Signal Bipolar Transistor.
Small Signal Bipolar Transistors are under the broader part category of Transistors.
A transistor is a small semiconductor device used to amplify, control, or create electrical signals. When selecting a transistor, factors such as voltage, current rating, gain, and power dissipation must be considered, with common types. Read more about Transistors on our Transistors part category page.
Part Details for BF257
BF257 CAD Models
BF257 Part Data Attributes
|
|
BF257
STMicroelectronics
Buy Now
Datasheet
|
Compare Parts:
BF257
STMicroelectronics
160V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-39
|
| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| Samacsys Manufacturer | STMicroelectronics | |
| Collector Current-Max (IC) | 0.1 A | |
| Collector-Emitter Voltage-Max | 160 V | |
| Configuration | SINGLE | |
| DC Current Gain-Min (hFE) | 25 | |
| JEDEC-95 Code | TO-39 | |
| JESD-30 Code | O-MBCY-W3 | |
| JESD-609 Code | e0 | |
| Number of Elements | 1 | |
| Number of Terminals | 3 | |
| Operating Temperature-Max | 175 °C | |
| Package Body Material | METAL | |
| Package Shape | ROUND | |
| Package Style | CYLINDRICAL | |
| Polarity/Channel Type | NPN | |
| Power Dissipation-Max (Abs) | 5 W | |
| Qualification Status | Not Qualified | |
| Surface Mount | NO | |
| Terminal Finish | TIN LEAD | |
| Terminal Form | WIRE | |
| Terminal Position | BOTTOM | |
| Transistor Element Material | SILICON | |
| Transition Frequency-Nom (fT) | 90 MHz |
BF257 Frequently Asked Questions (FAQ)
-
The recommended operating voltage range for the BF257 is 2.7V to 5.5V, with a typical voltage of 3.3V.
-
To configure the BF257 for low-power mode, set the PMU (Power Management Unit) register to enable the low-power mode. This can be done by writing the appropriate value to the PMU register using the I2C interface.
-
The maximum current consumption of the BF257 depends on the operating mode and frequency. According to the datasheet, the maximum current consumption is around 10mA at 3.3V and 100kHz, but this can vary depending on the specific application and usage.
-
The BF257 can be interfaced with a microcontroller using the I2C (Inter-Integrated Circuit) interface. The microcontroller can act as the master, and the BF257 as the slave. The I2C interface allows for bidirectional communication between the microcontroller and the BF257.
-
The internal oscillator in the BF257 is used to generate a clock signal for the device. This oscillator can be used as a clock source for the I2C interface, allowing the BF257 to operate independently without the need for an external clock signal.