MAX31C80 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Spread-Spectrum Clock Generators

19-5214; Rev 0; 4/10
Spread-Spectrum Clock Generators
General Description
The MAX31C80/MAX31D80 are spread-spectrum clock
generators that contain a phase-locked loop (PLL)
that generates a 2MHz to 134MHz clock from an input
clock or crystal. The PLL can provide a spread-spec-
trum down-dithered (MAX31D80) or center-dithered
(MAX31C80) frequency-modulated clock. The devices
also buffer the incoming clock and provide this output
on a separate pin.
The MAX318C80/MAX31D80 are provided in a 10-pin
TDFN package and operate over a full -40NC to +125NC
automotive temperature range. Devices can be factory
programmed for multiple combinations of input and out-
put frequencies (see the Ordering Information table). A
low-cost, low-frequency crystal can be used at the input
to generate frequencies up to 134MHz.
Typical Application Circuit
f_IN = 27MHz
f_IN = 27MHz
X1
X2
MAX31D80
V_CC
XOUT
SMSEL1
CLKOUT
SMSEL0
GND
V_CC
V_CC
27MHz CLOCK
f_CLKOUT = 100MHz
1.5% DOWN DITHERED
DECOUPLING
CAPACITOR
Features
S 2MHz to 134MHz Spread-Spectrum Clock
Generator
S Input Can Be Either an 8MHz to 34MHz Crystal or
8MHz to 134MHz Clock
S Factory-Programmable Output Frequencies in
2MHz to 134MHz Range
S Low-Cost Crystal at Low Frequency Used to
Generate High Frequencies
S On-Board PLL is Capable of Spread-Spectrum
Frequency Modulation
S Down- or Center-Dither Spread-Spectrum
Frequency Modulation
S User-Configurable Spread-Spectrum Dither
Magnitude
S Low Cycle-to-Cycle Jitter
S 3.3V Supply Voltage
S Temperature Range: -40NC to +125NC
S Small Package: 10-Pin TDFN (3mm x 3mm x
0.8mm)
Graphics Cards
Set-Top Boxes
Automotive Infotainment
Printers
Applications
Ordering Information
PART
MAX31C80T-xxx+
TEMP RANGE
-40NC to +125NC
DITHER MODE
Center
MAX31C80T-xxx+T
-40NC to +125NC
Center
MAX31D80T-xxx+
-40NC to +125NC
Down
MAX31D80T-xxx+T
-40NC to +125NC
Down
xxx = Factory-programmable output frequency and dither rate (see the Selector Guide table).
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
PIN-PACKAGE
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
Selector Guide appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products   1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.