MC145750 Datasheet, PDF (1/12 Pages) Motorola, Inc – QPSK Encoder

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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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
PIN ASSIGNMENT
NC
PB1
CF
PCO
PLL
ECLK
DVDD
DVSS
DCLK
DS/STBY
TXD
ERST/PDN
36
37
48
1
25
24 TB7
TNO/TB8
BW/TB9
NC
Iout
DAref3
DAref2
DAref1
DAref
Qout
DAVSS
13 ^DAVDD
12
NC = NO CONNECTION
Order this document
by MC145750/D
MC145750
VFU SUFFIX
PLASTIC VQFP
CASE 932
ORDERING INFORMATION
MC145750VFU VQFP
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
©_MOMo_Tto_Oro_Rla,_OIn_Lc._A1995
MC145750
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