MC145750

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145750/D MC145750 Product Preview QPSK Encoder The MC145750 is a silicon gate HCMOS device designed to encode π/4–shift QPSK baseband signals. The device contains two 10–bit DACs for the I/Q signal, Root–Nyquist digital filtering, and burst rising and falling edge processing for digital RF communication equipment. Primary applications for this device are in products that will be used in PHS (384 kbps) and PDC (42 kbps). It will perform up to 800 kbps data rate. It also contains PN511 random pattern generator and timing generator with PLL. Root–Nyquist Digital Filtering (Coefficient = 0.5) Burst Edge Processing Circuitry (Ramp–Up and –Down) Two 10–Bit DACs for I/Q Output Operating Voltage Range: 2.7 to 5.5 V PN511 Random Pattern Generator Conformance to RCR Standard for PHS, PDC Variable Data Transmission Rate up to 800 kbps (VDD = 5 V) Timing Generator with PLL QPSK Mode, Burst, and Continuous I/Q Signal Output is Performed Companion Device is MRFIC0001 VFU SUFFIX PLASTIC VQFP CASE 932 ORDERING INFORMATION MC145750VFU VQFP PIN ASSIGNMENT NC PB2 NC NC TB0 TB1 TB2 TB3 TB4 TB5 TB6 NC NC PB1 CF PCO PLL ECLK DVDD DVSS DCLK DS/STBY TXD ERST/PDN 37 36 25 24 48 1 13 12 TB7 TNO/TB8 BW/TB9 NC Iout DAref3 DAref2 DAref1 DAref Qout DAVSS DAVDD This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice. REV 2 10/95...