MAX9471 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Multiple-Output Clock Generators with Dual PLLs and OTP

19-0524; Rev 1; 8/06
Multiple-Output Clock Generators with
Dual PLLs and OTP
General Description
The MAX9471/MAX9472 multipurpose clock generators
are ideal for consumer and communication applica-
tions. The MAX9471/MAX9472 feature two buffered
phase-locked loop (PLL) outputs that can be indepen-
dently set from 4MHz to 200MHz. These devices also
provide one (MAX9472) or two (MAX9471) buffered
outputs of the reference clock.
The MAX9471 outputs a set of MPEG/AC3 audio and
video frequencies most commonly used in consumer
applications. The MAX9472 outputs a set of common
audio frequencies. These frequencies are selected
through an I²C^† interface (MAX9471) or by setting the
three-level FS pins. The MAX9471/MAX9472 feature a
one-time-programmable (OTP) ROM, allowing one-time
programming of the two PLL outputs.
The MAX9471/MAX9472 include two basic configura-
tions. In one configuration, the OTP ROM sets PLL1 out-
put to any frequency between 4MHz to 200MHz, and
the I²C interface (MAX9471) or programmable pins set
the PLL2 output frequency to a set of audio and video
frequencies. In the other configuration, the OTP ROM
sets both PLL1 and PLL2 frequencies to fixed values
between 4MHz to 200MHz. In both cases, the reference
output is available, but the OTP ROM can disable it.
The OTP ROM on the MAX9471/MAX9472 is factory set
based on the customer requirements. Contact the factory
for samples with preferred frequencies.
The devices operate from a 3.3V supply and are specified
over the -40°C to +85°C extended temperature range.
The MAX9471 is available in a 20-pin TQFN package. The
MAX9472 is available in a 14-pin TSSOP package.
Applications
Digital TVs
Communication Systems
Data Networking Systems
Set-Top Boxes
Home Entertainment Centers
Multimedia PCs
†Purchase of I²C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I²C Patent Rights to use these com-
ponents in an I²C system, provided that the system conforms
to the I²C Standard Specification as defined by Philips.
Features
♦ 5MHz to 50MHz Input Clock Reference
♦ Crystal or Input-Clock-Based Reference
♦ Two Fractional-N Feedback PLLs (4MHz to
200MHz) with Buffered Outputs
♦ Two Buffered Outputs of Reference Clock
♦ OTP for Factory-Preset PLL Frequencies
Available (Contact Factory)
♦ Programmable Through I²C Interface or Three-
Level Logic Pins for Video or Audio Clocks
♦ Low-RMS Jitter PLL (14ps for 45MHz)
♦ Integrated VCXO with ±200ppm Tuning Range
♦ Available in 20-Pin TQFN and 14-Pin TSSOP
Packages
♦ +3.3V Supply
♦ -40°C to +85°C Temperature Range
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX9471ETP+** -40°C to +85°C 20 TQFN-EP* T2055-5
MAX9472EUD+** -40°C to +85°C 14 TSSOP
U14-2
*EP = Exposed pad.
**Marking is for samples only. Contact factory for ordering information.
+Denotes lead-free package.
TOP VIEW
Pin Configurations
V_DD 16
X2 17
X1 18
FSO/SCL 19
FS1/SDA 20
+
MAX9471
10 GND
9 I.C.
8 CLK4
7 CLK3
6 CLK2
TQFN (5mm x 5mm)
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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