View tda8050a n 1 datasheet:

INTEGRATED CIRCUITS DATA SHEET TDA8050A QPSK transmitter Product specification 1999 Nov 05 File under Integrated Circuits, IC02 Philips Semiconductors Product specification QPSK transmitter TDA8050A FEATURES Two PLLs are incorporated, the first PLL includes: • A fixed main divider • Programmable gain • A crystal oscillator and its programmable reference • PLL controlled carrier frequency divider • 3-wire transmission bus • A phase/frequency detector, combined with a fixed • 5 V supply voltage. charge pump. The second PLL includes: APPLICATIONS • A divide-by-four preamplifier • QPSK modulation. • A 12-bit programmable divider • A crystal oscillator and its programmable reference GENERAL DESCRIPTION divider The Quadrature Phase Shift Keying (QPSK) transmitter IC •