This datasheet introduces MAX3987, a 4-channel receive and transmit equalizer (EQ) that compensates for transmission medium losses encountered with FR4 stripline/microstrip and/or high-speed cable. The device can be used at the beginning, middle, or end of a channel. The input equalization requires no setting, and the output preemphasis (PE) is programmable. Through an I2C serial interface, the preemphasis level, output drive level, output polarity, and powering down of unused outputs are programmable for each channel. It can also be configured globally through pins. The device operates from a 2.5V or 3.3V supply, and is packaged in a 7mm x 7mm, 48-pin TQFN.
The MAX3987 provides 4‑channel receive and transmit equalization for high‑speed serial links such as XAUI, Fibre Channel, InfiniBand, SAS‑2 and SATA‑3 OOB. It supports programmable pre‑emphasis and output drive levels via an I²C serial interface or pin‑level globals, and can be used at the beginning, middle, or end of a channel.
Key specifications include operation from 2.5 V or 3.3 V supplies, up to 8.5 Gbps NRZ data rates, a 0.5 W typical power dissipation at 2.5 V, and a 48‑pin TQFN‑EP package (7 mm × 7 mm). The device features built‑in signal detect, squelch, and compliance with PCIe, SAS‑2 and SATA‑3 standards.
| Maximum Data Rate | 8.5 Gbps NRZ |
|---|---|
| Supply Voltage | 2.5 V or 3.3 V |
| Package | 48‑pin TQFN‑EP, 7 mm × 7 mm |
| Typical Power Dissipation | 0.5 W at VCC = 2.5 V |
| Operating Temperature Range | -40 °C to +85 °C |
| I2C Clock Frequency | 400 kHz max |
The MAX3987 supports up to 8.5 Gbps NRZ data speed.
It can operate from either a 2.5 V or a 3.3 V supply.
The IC is supplied in a 48‑pin TQFN‑EP package measuring 7 mm × 7 mm.