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參數資料
| 型號： | MAX9472 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Multiple-Output Clock Generators with Dual PLLs and OTP |
| 中文描述： | 多輸出時鐘發生器，提供雙PLL和OTP |
| 文件頁數： | 1/13頁 |
| 文件大小： | 3400K |
| 代理商： | MAX9472 |
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 I
2
C
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 I
2
C 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
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 I
2
C 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
M
Multiple-Output Clock Generators with
Dual PLLs and OTP
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
1
1
1
1
P
F
V
D
V
D
1
G
8
7
6
9
10
CLK3
CLK4
I.C.
GND
CLK2
19
18
17
16
FSO/SCL
X1
X2
V
DD
20
+
FS1/SDA
1
2
3
4
T
V
D
A
G
5
C
MAX9471
TOP VIEW
TQFN (5mm x 5mm)
Pin Configurations
19-0524; Rev 1; 8/06
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX9471
ETP+**
M A X9 4 7 2
E U D + *
-40°C to +85°C
-40°C to +85°C
20 TQFN-EP*
14 TSSOP
T2055-5
U14-2
Ordering Information
*
EP = Exposed pad.
**
Marking is for samples only. Contact factory for ordering information.
+
Denotes lead-free package.
Pin Configurations continued at end of data sheet.
Purchase of I
2
C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I
2
C Patent Rights to use these com-
ponents in an I
2
C system, provided that the system conforms
to the I
2
C Standard Specification as defined by Philips.
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