Dual PCI Express Equalizer/Redriver

The MAX4950A dual PCI Express® (PCIe) equalizer/redriver operates from a single +3.3V supply. This device improves signal integrity at the receiver through programmable input equalization and redrive circuitry with output deemphasis to correct for high-frequency losses. This device permits optimal placement of key PCIe components and longer runs of stripline, microstrip, or cable.

The MAX4950A contains two identical channels capable of equalizing PCIe Gen I (2.5GT/s) and Gen II (5.0GT/s) signals. The MAX4950A features electrical idle and receiver detection on each channel and a power-saving mode.

The MAX4950A is available in a small 36-pin (6.0mm x 6.0mm) TQFN package with flowthrough traces for optimal layout and minimal space requirements. The MAX4950A is specified over the 0°C to +70°C commercial operating temperature range.

Applications

* Communications Switchers * Computers * External Graphics Applications * Industrial PCs * Servers * Storage Area Networks * Test Equipment

* Single +3.3V Supply Operation

* PCIe Gen I (2.5GT/s) and Gen II (5.0GT/s) Capable

* Excellent Differential Return Loss:

* ≥ 8dB (f = 1.25GHz to 2.5GHz)

* Very Low Latency with 280ps (typ) Propagation Delay

* Individual Lane Detection

* Three-Level Programmable Input Equalization

* Three-Level Programmable Output Deemphasis

* Standard, -2.5dB Programmable Output Levels

* On-Chip 50Ω Input/Output Terminations

* Space-Saving, 6.0mm x 6.0mm TQFN Package