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MAX4950
Quad PCI Express Equalizer/Redriver
Ultra-Small Equalizer/Redriver Improves PCIe Signal Integrity Across Systems
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Status
Active: In Production.
Description
The MAX4950 PCI Express (PCIe®) quad equalizer/redriver operates from a single +3.3V supply. This device improves signal integrity at the receiver through programmable input equalization and programmable redrive circuitry. The output circuitry reestablishes deemphasis lost on the board, compensating for circuit board loss. This device permits optimal placement of key PCIe components and longer runs of stripline, microstrip, or cable.
The MAX4950 contains four identical buffers capable of equalizing differential signals at data rates up to 5GT/s, and features electrical idle and receiver detection on each channel. The MAX4950 is ideal for use with PCIe Gen I (2.5GT/s) and Gen II (5.0GT/s) data rates and features a power-saving mode.
The MAX4950 is available in a small, lead-free, 42-pin (3.5mm x 9.0mm) TQFN package for optimal layout and minimal space requirements. The board traces are flow-through for ease of layout. The MAX4950 is specified over the 0°C to +70°C operating temperature range.
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Data Sheet
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Key Features
- Single +3.3V Supply Operation
- Generation I (2.5GT/s) and Generation II (5.0GT/s) Capable
- Return Loss:
- ≥ 10dB (f ≤ 1.25GHz)
- ≥ 8dB (f ≤ 2.5GHz)
- Very Low Latency
- Individual Lane Detection
- Low Lane-to-Lane Skew: ±50ps
- Total Jitter ≤ 35psP-P at BER = 10-12
- Three-Level-Programmable Input Equalization
- Three-Level-Programmable Output Deemphasis
- On-Chip 50Ω Input/Output Terminations
- ±2kV Human Body Model (HBM) Protection on All Pins
- Space-Saving, 3.5mm x 9.0mm, TQFN Packaging
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Applications/Uses
- Communication Switchers
- Desktop Computers
- Industrial PCs
- Laptop Computers (for External Video Cards)
- Servers
- Storage Area Networks
- Test Equipment
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Key Specifications:
| Repeaters and Buffers (SAS, SATA, PCIe, USB) |
| Part Number |
Functions |
Interface |
Data Rate
(Mbps) |
VSUPPLY
(V) |
ICC
(mA) |
Channels |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
Budgetary Price |
| max |
typ |
max w/pins |
See Notes |
| MAX4950 |
Equalizer/Re-Driver |
PCIe |
5000 |
3.3 |
262 |
4 |
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32.8 |
0 to +70 |
$8.22 @1k |
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See All Repeaters and Buffers (SAS, SATA, PCIe, USB) (15)
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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 Diagram
More Information
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Information Index
Document Ref.: 19-4439
Rev 0;
2009-05-19
This page last modified: 2010-03-10
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