SY55858U is a low voltage, high bandwidth dual 2 x 2 crosspoint switch with a flexible input that accepts CML or PECL, and a 50Ω compatible differential CML (current-mode logic) output. The non-blocking design allows any input to connect to any output. Varying the state of the select inputs allows SY55858U to be used in backup, fault tolerant, protection and backplane distribution applications. The signal inputs (DA0–1 and DB0–1) have a unique internal termination design that allows access to the termination network through VT pins. This feature allows the device to easily interface to other logic standards such as AC-coupled or DC-coupled PECL/LVPECL signals.
The SY55858U is a low‑voltage, high‑speed dual 2 × 2 crosspoint switch that supports CML or PECL inputs and 50Q compatible differential CML outputs. It offers configurable modes such as dual 2:1 mux, fan‑out buffers, and a non‑blocking architecture for backup, fault‑tolerant, and backplane distribution applications.
The datasheet details package information, pin assignments, electrical characteristics, and timing parameters. It includes absolute maximum ratings, DC and AC specifications, and application notes for CML output termination and input interface configurations.
| Power Supply Voltage | 2.3 V – 3.6 V |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Maximum Data Rate (NRZ) | 3.0 Gbps |
| Differential Input Voltage | 100 mV |
| Package Pin Count | 32 pins (EPAD‑TQFP) |
The device operates from 2.3 V up to 3.6 V supply voltage.
It is rated for operation from –40 °C to +85 °C.
The SY55858U is supplied in a 32‑pin EPAD‑TQFP package.
The device supports a maximum NRZ data rate of 3.0 Gbps.