PI2EQX4402D (Obsolete)

Product Description

Pericom Semiconductor’s PI2EQX4402D is a low power, PCI Express compliant signal Re-Driver. The device provides programmable equalization, amplification, and de-emphasis by using 7 select bits, SEL[0:6], to optimize performance over a variety of physical mediums by reducing Inter-symbol interference. PI2EQX4402D supports four 100-ohm Differential CML data I/O’s between the Protocol ASIC to a switch fabric, across a backplane, or extends the signals across other distant data pathways on the user’s platform.

The integrated equalization circuitry provides flexibility with signal integrity of the PCI Express signal before the Re-Driver. Whereas the integrated de-emphasis circuitry provides flexibility with signal integrity of the PCI Express signal after the Re-Driver.

A low-level input signal detection and output squelch function is provided for all four channels. Each channel operates fully independantly. When a channel is enabled (EN_x=1) and operating, that channel input signal level (on xl+/-) determines whether the output is enabled. If the input level of the channel falls below the active threshold level (Vth-) then the output driver switches off, and the pin is pulled to VDD via a high impedance resistor.

In addition to providing signal re-conditioning, Pericom’s PI2EQX4402D also provides power management Stand-by mode operated by an Enable pin. A differential clock buffer is provided for test and other system requirements. This clock function is not used by the data channels.

Features

• Two High Speed PCI Express lanes
• Supports PCI Express data rates (2.5 Gbps) on each lane
• Adjustable Transmiter De-Emphasis & Amplitude
• Adjustable Receiver Equalization
• Input Signal Level Detect & Output Squelch on all Channels
• Two Spread Spectrum Reference Clock Buffer Outputs
• 100Ω Differential CML I/O’s
• Low Power (100mW per Channel)
• Standby Mode – Power Down State
• VDD Operating Range: 1.8V +/-0.1V
• Packaging (Pb-free & Green): 84-ball LFBGA (NB84)