[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