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MAX9476
Low-Jitter, 8kHz Reference Clock Synthesizer Outputs 35.328MHz
Clock Generator is Optimized for xDSL CO Line Cards and Telecom Systems Requiring Low-Jitter Clock Outputs
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Status
Active: In Production.
Description
The MAX9476 low-cost, high-performance clock synthesizer 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 systems using T1, E1, T3, E3, and xDSL.
The MAX9476 features a phase-lock loop (PLL) that uses a voltage-controlled crystal oscillator (VCXO). The internal PLL phase locks the external crystal (35.328MHz) to the 8kHz input reference clock. In addition, this device generates a jitter-suppressed output that provides a better source for the reference clock relay.
The MAX9476 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. For using lower value external
crystals, refer to the MAX9486 data sheet.
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Data Sheet
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Key Features
- 8kHz Input-Reference CLK
- 4psRMS (typ) Output Jitter
- High-Jitter Rejection on the Reference CLK
- Synthesizer Locks to the 8kHz Reference with a ±100ppm 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
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Applications/Uses
- Telecom Equipment Using T1, E1, T3, E3, and ISDN Protocols
- xDSL Equipment in CO with Interface to the Telecom Protocols
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Key Specifications:
| Clock Generators |
| Part Number |
Applications |
fIN
(MHz) |
fIN
(MHz) |
fOUT
(MHz) |
fOUT
(MHz) |
Fixed or Continuous Frequency |
Output Levels |
Out-
puts |
PLLs |
Spread Spectrum |
Output Jitter
(ps) |
VSUPPLY
(V) |
Package/Pins |
Budgetary Price |
| min |
max |
min |
max |
RMS |
See Notes |
| MAX9476 |
|
0.008 |
0.008 |
35.328 |
35.328 |
Fixed |
LVCMOS |
6 |
1 |
No |
4 |
3.3 |
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$6.95 @1k |
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See All Clock Generators (34)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Application Circuit
Reliability Reports
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX9476EUG
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Active |
TSSOP;24 pin;52.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0118 (PDF)
Use pkgcode/variation: U24-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX9476EUG-T
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Active |
TSSOP;24 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-3530
Rev 0;
2005-02-03
This page last modified: 2007-07-25
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