NJW1508V-TE1#

Overview

The NJW1508V-TE1 is a PLL frequency synthesizer designed for TV and VCR tuning systems, manufactured by Nisshinbo Micro Devices Inc. It integrates a PLL circuit and a prescaler operating up to 1.0 GHz within a single chip. The device is controlled via an I2C bus interface and features a buffer amplifier for external reference signals. Key electrical parameters include a supply voltage range of 4.5 V to 5.5 V for Vcc1/Vcc3, a maximum tuning voltage output of 34 V on Vcc2, and a typical operating current of 15 mA at 5 V. It operates within a temperature range of -20°C to +85°C and is housed in a 16-SSOP package.

Feature Summary

• Integrated PLL synthesizer with a prescaler supporting frequencies up to 1.0 GHz
• I2C bus control interface for programmable divider and band switching
• Buffer amplifier for external crystal reference signal input
• Maximum tuning voltage output of 34 V

Applications

• TV tuner systems
• VCR tuning circuits

Procurement Notes

Verify the specific ordering suffix TE1 against the manufacturer's official documentation to confirm packaging details such as reel size or tape specifications. Ensure that the I2C address configuration pins (ADRS) are correctly set according to the system requirements before procurement.

Selection Notes

Select the NJW1508V-TE1 when an external reference oscillator is required, as it includes a buffer amplifier unlike the NJW1504 which has an internal oscillator. Confirm that the application requires a 5 V supply and I2C compatibility. Verify that the 1.0 GHz maximum input frequency meets the design specifications.

Part Context

This component belongs to the NJW1504/1508 series of PLL synthesizers specifically engineered for consumer audio/video applications. The NJW1508 variant is distinguished by its external reference signal buffer, providing flexibility in clock source selection compared to the integrated oscillator version.

Replacement Considerations

The NJW1504V is a direct functional alternative within the same series; however, it contains an internal crystal oscillator rather than an external buffer amplifier. Substitution requires verifying if the system design supports an internal oscillator or needs modification for external reference input.