LUCDA4044 Datasheet, PDF (1/6 Pages) Agere Systems – Phase Frequency Detector

Preliminary Data Sheet
August 1998
LUCDA4044 Phase Frequency Detector
Features
Applications
s Typical propagation delay 9.0 ns (through phase
detector)
s Includes charge pump and amplifier
s Available in 14-pin DIP or SONB
s Frequency synthesizers
s Clock recovery
Description
R1
D1 2
V3
PU 4
UF 5
D2 6
GND 7
PHASE
FREQUENCY
DETECTOR
#1
PHASE
FREQUENCY
DETECTOR
#2
CHARGE
PUMP
14 VCC
13 U1
12 U2
11 PD
10 DF
9 AIN
8 AOU
Figure 1. Functional Diagram
12-3519F
The LUCDA4044 consists of two digital phase detec-
tors, a charge pump, and an amplifier. In combination
with a voltage-controlled multivibrator, this device is
useful in a broad range of phase-locked loop (PLL)
applications. The circuit accepts TTL waveforms at
the R and V inputs and generates an error voltage
that is proportional to frequency and/or phase differ-
ence.
Phase detector #1 is intended for use in systems
requiring zero frequency and phase at lock. Phase
detector #2 is used if quadrature lock is desired.
Phase detector #2 can also be used to indicate that
the main loop (utilizing phase detector #1) is out of
lock. This LUCDA4044 is a direct replacement for the
Motorola* MC4044.
* Motorola is a registered trademark of Motorola Inc.