信号缓冲器、中继器

SN65LVDS100DGKRG4

SN65LVDS100DGKRG4 - 2Gbps LVDS Repeater | TI | VSSOP-8

The Texas Instruments SN65LVDS100DGKRG4 is a 2 Gbps LVDS/LVPECL/CML-to-LVDS differential repeater and translator in an 8-pin VSSOP (DGK) package. It regenerates high-speed differential signals with only 65 ps of total jitter, making it a clean-signal solution for long backplane or cable runs. A differential repeater is a signal-conditioning device placed in a high-speed serial link: it receives a degraded differential waveform, re-amplifies and re-times it through a receiver-driver pair, and launches a fresh LVDS signal onto the next segment. In the signal-integrity hierarchy it sits between a plain buffer and a full retimer, belonging to the broader family of interface ICs and signal buffers/repeaters. Key features include signaling rates up to 2 Gbps, low 100 ps maximum part-to-part skew, receiver input threshold hysteresis for noise rejection, and a wide input common-mode range that accepts LVDS, PECL, and CML signal levels. TI positions it as a low-power alternative to the MC100EP16 ECL repeater, offering significant static current savings in LVDS mode. The input receiver tolerates a broad common-mode range, so designers can AC-couple or DC-couple LVPECL and CML sources with simple biasing. The output drives a nominally 100-ohm differential transmission line with standard LVDS levels. The signal path is always-on: power is roughly the sum of receiver and driver currents, and the DGK package junction-to-ambient thermal resistance comfortably handles the sub-100 mW dissipation. Typical applications include clock distribution and fan-out in telecom line cards, redriving LVDS signals across backplanes and cable interconnects, and translating PECL or CML outputs to LVDS-compatible receivers in test instrumentation and imaging systems. For design, keep the 100-ohm differential impedance continuous through the device; place the part at the midpoint of lossy traces where the eye is still open enough to meet the receiver threshold. AC-coupled PECL inputs require appropriate bias resistors per the TI datasheet application section. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.