LC72121_03 Datasheet, PDF (1/23 Pages) Sanyo Semicon Device – PLL Frequency Synthesizers for Electronic Tuning

Ordering number : EN5815B
CMOS IC
LC72121, 72121M, 72121V
PLL Frequency Synthesizers for Electronic Tuning
Overview
The LC72121 and the LC72121M and the LC72121V are
high input sensitivity (20 mVrms at 130 MHz) PLL
frequency synthesizers for 3 V systems. These ICs are
serial data (CCB) compatible with the LC72131, and
feature the improved input sensitivity and lower spurious
radiation (provided by a redesigned ground system)
required in high-performance AM/FM tuners.
Functions
• High-speed programmable divider
— FMIN: 10 to 160 MHz ... Pulse swallower technique
(With built-in divide-by-2
prescaler)
— AMIN: 2 to 40 MHz ... Pulse swallower technique
0.5 to 10 MHz ... Direct division technique
• IF counter
— IFIN: 0.4 to 15 MHz ... For AM and FM IF counting
• Reference frequency
— One of 12 reference frequencies can be selected
(using a 4.5 or 7.2 MHz crystal element)
1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, and 100
kHz
• Phase comparator
— Supports dead zone control.
— Built-in unlocked state detection circuit
— Built-in deadlock clear circuit
• An MOS transistor for an active low-pass filter is built
in.
• I/O ports
— Output-only ports: 4 pins
— I/O ports: 2 pins
— Supports the output of a clock time base signal.
• Operating ranges
— Supply voltage: 2.7 to 3.6 V
— Operating temperature: – 40 to 85°C
• Package
— DIP22S, MFP24S, SSOP24
• Comparison with the LC72131/M
— Serial data compatible (CCB)
— Identical pin functions
— Two V_SS pins were added.
— The DIP version is pin compatible (V_SS pins were
inserted as the DIP22S NC pins.)
— The MFP product provides a modified pin
assignment (The MFP20 package was replaced by
an MFP24 package, and extra V_SS pins were added.)
— The SSOP24 is a newly developed package that has
the same pin assignment as the MFP24S product.
• CCB is a trademark of SANYO ELECTRIC CO., LTD.
• CCB is SANYO’s original bus format and all the bus
addresses are controlled by SANYO.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
10803AS (OT) /D3098HA (OT) /70398RM (OT) No. 5815-1/23