Rainbow Electronics MAX9486 User Manual

General description, Applications, Features

General Description

The MAX9486 low-cost, high-performance clock syn-
thesizer with an 8kHz input reference clock provides six
buffered LVTTL clock outputs at 35.328MHz. The clock
synthesizer can be used to generate the clocks for T1,
E1, T3, E3, and xDSL.

The MAX9486 has two phase-lock loops (PLLs). The
first PLL uses a voltage-controlled crystal oscillator
(VCXO). The second PLL is a frequency multiplier. With
the two PLLs, the MAX9486 generates the output fre-
quency at 35.328MHz. In addition, this device gener-
ates a jitter-suppressed 8kHz output that provides a
better source for the reference clock relay.

The MAX9486 is available in a 24-pin TSSOP package
and operates over the extended operating temperature
range of -40

°C to +85°C and a single +3V to +3.6V

power-supply range.

Applications

Telecom Equipment Using T1, E1, T3, E3, and
ISDN Protocols

xDSL Equipment in CO with Interface to the
Telecom Protocols

Features

♦ 8kHz Input Reference CLK
♦ High-Jitter Rejection on the Reference CLK
♦ Synthesizer Locks to the 8kHz Reference with a

±200ppm Range

♦ Output Frequency: 35.328MHz
♦ Six Buffered LVTTL Low-Jitter Outputs
♦ One 8kHz Reference CLK Relay Output
♦ +3.3V Supply Operation
♦ 24-Pin TSSOP Package

MAX9486

8kHz Reference Clock Synthesizer

with Multiple Outputs at 35.328MHz

________________________________________________________________ Maxim Integrated Products

Ordering Information

19-3345; Rev 0; 8/04

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.

EVALUATION KIT

AVAILABLE

PART

TEMP RANGE

PIN-PACKAGE

MAX9486EUG

-40

°C to +85°C

24 TSSOP

CLK1

GND

CLK2

DDP

REIN

REO

TOP VIEW

CLK3

GND

CLK4

GNDP

CLK5

GND

CLK6

SETI

LP1

LP2

GND

TSSOP

MAX9486

SHDN

Pin Configuration