[HiMARK Technology]

Description

The TX4915 is a monolithic integrated circuit intended for use as a low-cost AM/ASK transmitter. The chip can be used in applications in the north American and European VHF/UHF bands. The integrated VCO, phase detector, prescaler, and reference oscillator transistor require only the addition of an external crystal to provide a complete phaselocked loop. In addition to the standard power-down mode, the chip also includes an automatic lock-detect feature that disables the transmitter output when the PLL is out-of-lock.

Features

◆ Fully Integrated Frequency Synthesizer

◆ 2.2V to 5.5V Voltage Supply Range

◆ Low Current and Power Down Capability

◆ Integrated VCO and Reference Oscillator

◆ integeated 64/128 Dual Modulus Prescaler

◆ 100MHz to 960MHz frequency Range

◆ Out-of-Lock inhibit Circuit