MAX14955 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Computer on Modules

MAX14955
Single-Lane PCIe Gen III Redriver
with Equalization and Extended
Temperature Operation
General Description
The MAX14955 dual equalizer/redriver improves PCI
Express^® (PCIe) signal integrity by providing program-
mable input equalization. This feature reduces deter-
ministic jitter and redrives circuitry to reestablish deem-
phasis, which compensates for circuit-board loss at high
frequencies. The device permits optimal placement of key
PCIe components and allows for longer runs of stripline,
microstrip, or cable.
The device contains two identical channels capable of
equalizing PCIe Gen III (8GT/s), Gen II (5GT/s), and
Gen I (2.5GT/s) signals and features electrical idle and
receiver detection.
The MAX14955 is available in a small, 40-pin, 5.0mm x
5.0mm TQFN package with flow-through traces for opti-
mal layout and minimal space requirements. The device
is specified over the -40°C to +85°C extending operating
temperature range.
Applications
● Industrial/Embedded PCs
● Computer on Modules
● Carrier Boards
● Test Equipment
● Rack Server Industrial PCs
● Medical Equipment
Typical Operating Circuit
Benefits and Features
● Fully Integrated for Ease of Use and Design Flexibility
• Optimized for PCIe Gen III (8.0GT/s), Gen II
(5.0GT/s), Gen I (2.5 GT/s) Compatible
• Four Levels of Input Equalization up to 16dB
• Eight Levels of Output Deemphasis up to 9dB
● High Level of Performance to Overcome Noise in
Lossy Channels
• Random Jitter: 0.5ps_RMS (typ)
• Deterministic Jitter: 7ps_P-P (typ)
• Equalization Permits Placement Up to 30in FR4
● Robust Solution for Harsh Environments
• Industrial Temperature Rated: -40°C to +85°C
• ±4kV Human Body Model (HBM) Protection on All
Pins
• Housed in a Flow-Through (5mm x 5mm) TQFN
Package for Resistance to Vibration/Shocks
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX14955.related.
MAIN BOARD
Tx
PCIe
Rx
MAX14955
MIDPLANE
SINGLE DIFFERENTIAL PAIR
SINGLE DIFFERENTIAL PAIR
REMOTE BOARD
Rx
PCIe
Tx
CONNECTORS
PCI Express is a registered service mark of PCI-SIG Corporation.
19-6640; Rev 0; 3/13