Description

Brief Description: This is a bipolar linear integrated circuit silicon monolithic, namely TA2149BFN, which falls into the category of IC chips. It is a 3V AM/FM 1 chip tuner IC designed specifically for portable radios and 3V headphone radios. This model is suitable for digital tuning system applications, with a low relativity FM local oscillation voltage for the new FCC regulations.

Specifications and features

Functions:

• Suitable for combination with Digital Tuning System which is included IF Counter.
• Adjustable for IF count output sensitivity by external resistance of pin 17 (FM only).
• One terminal type AM/FM IF count output for IF counter of Digital Tuning System.
• FM: 1.3375 MHz (1/8 dividing)
• AM: 450 kHz
• Built-in Mute Circuit for IF count output.
• For adopting ceramic Discriminator, it is not necessary to adjust the FM Quad Detector Circuit.
• Built-in FM MPX VCO circuit.
• Built-in one terminal type AM/FM Local Oscillator Buffer Output for Digital Tuning System Applications.
• Built-in 1/16 Pre-scaler for FM Local OSC Buffer.
• Built-in AM Low cut circuit.
• Low supply current. (VCC= 3 V, Ta = 25°C)
• ICCq(FM) = 13 mA (Typ.)
• ICCq(AM) = 8.5 mA (Typ.)
• Operating Supply voltage range: VCC= 1.8~7 V (Ta = 25°C)

Application Scenarios

This TA2149BFN model is specifically designed for portable radios and 3V headphone radios. It is suitable for digital tuning system applications.

Comparison

• Low supply current
• Adjustable IF count output sensitivity
• Built-in FM MPX VCO circuit

• Specifically designed for portable radios and 3V headphone radios