The 2SA1790-C(TX) is a PNP silicon epitaxial planar transistor manufactured by Panasonic. This transistor is designed for audio frequency amplifier applications, focusing on low-noise and high-linearity performance. The suffix '-C' indicates a specific gain rank within the production batch, and '(TX)' may denote packaging or specific testing criteria.

Applications

• Audio preamplifiers: Used in the initial amplification stages of audio systems to amplify weak signals with minimal noise.
• Microphone amplifiers: Employed to boost the signal from microphones in recording and communication devices.
• Line amplifiers: Used to increase the signal level for transmission over longer distances in audio distribution systems.
• Equalizers: Incorporated in audio equalizers to adjust the frequency response of audio signals.

Features

• PNP silicon epitaxial planar transistor.
• Low noise figure.
• High current gain (hFE).
• Low distortion.
• Excellent frequency response.

Benefits

• Provides high-quality audio amplification with minimal added noise.
• Ensures faithful reproduction of audio signals due to low distortion.
• Offers stable performance over a wide range of frequencies.
• Suitable for applications requiring high signal fidelity.

Technical Specifications (Typical)

• Collector-Base Voltage (VCBO): -50V
• Collector-Emitter Voltage (VCEO): -50V
• Emitter-Base Voltage (VEBO): -5V
• Collector Current (IC): -50mA
• Collector Power Dissipation (PC): 200mW
• Current Gain (hFE): Varies depending on the '-C' ranking, typically between 200 and 400.
• Transition Frequency (fT): 100 MHz
• Operating Junction Temperature: 150°C

The 2SA1790-C(TX) is particularly well-suited for audio applications demanding high-fidelity amplification. Its low noise characteristics make it an excellent choice for preamplifiers and other sensitive audio stages. The gain ranking ('-C') ensures consistent performance across different devices. The (TX) suffix might relate to particular testing parameters or packaging configurations applied during manufacturing by Panasonic. Its reliable performance and well-defined specifications make it a valuable component for audio engineers and electronic designers.