Diodes Incorporated PI90LVB044QE

Overview

PI90LVB044QE from Pericom Semiconductor is a dual 2×2 LVDS crosspoint/repeater switch optimized for multipoint data transmission over controlled-impedance media, supporting signaling rates up to 650 Mbit/s (325 MHz), operating from a single 3.3 V supply across –40°C to +85°C, with ±350 mV differential input acceptance and 50 Ω LVDS output drive capability.

For engineers reviewing the PI90LVB044QE datasheet, PI90LVB044QE pinout, PI90LVB044QE application, or PI90LVB044QE equivalent, key selection criteria include differential propagation delay (≤6.0 ns), fail-safe input handling (0.2–2.7 V common-mode range), high-impedance outputs when disabled, 5 V-tolerant TTL control inputs, and ESD protection (10 kV on bus pins).

Technical Context

The device implements two independent 2×2 asynchronous crosspoint switches using a multiplexer-tree architecture, each accepting two differential input pairs (A/B) and routing to two differential output pairs (Y/Z) via logic-controlled select lines (S0–S3). Signal paths are fully differential and unregistered-no clock required.

It supports two operational modes: splitter mode (S1/S0 = 00 or 01) replicates one input pair to both outputs; router mode (S1/S0 = 10 or 11) routes inputs selectively. Enable pins (1DE/2DE, 3DE/4DE) independently place corresponding Y/Z outputs into high-impedance state when low or when VCC ≤ 1.5 V.

Key Specifications

Pinout & Package

Package: 28-pin TSSOP (170-mil width, Pb-free & Green compliant, package code L).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVDS crosspoint/repeater applications.

Compared with DS25BR100TSQ and NB7L14MNR2G, PI90LVB044QE uniquely combines multipoint 50 Ω LVDS drive, TTL-compatible routing controls, and fail-safe inputs-making it optimal for industrial and automotive multipoint LVDS systems requiring robustness and configurability over raw speed or jitter performance.

Availability

PI90LVB044QE is available at Aetrix Electronics and suitable for industrial machine vision systems, automotive ADAS camera links, and test & measurement equipment backplanes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI90LVB044QE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-speed interface ICs including clock buffers, USB switches, and LVDS solutions before its 2016 acquisition.

The PI90LVB044QE belongs to Pericom's LVDS crosspoint/repeater product line, engineered specifically for robust, reconfigurable high-speed data routing in noise-sensitive industrial and automotive environments.

FAQ

What is the difference between PI90LV044 and PI90LVB044?

The PI90LVB044 doubles the output drive current versus the PI90LV044 to deliver LVDS-compliant differential voltage (440–590 mV) into a 50 Ω load, enabling multipoint bus topologies. In contrast, the PI90LV044 targets point-to-point links with 100 Ω termination, producing 247–590 mV into 100 Ω. Both share identical pinout, control logic, and timing specifications.

Can PI90LVB044QE be used with 100 Ω termination?

No-PI90LVB044QE is optimized for 50 Ω loads and will not meet LVDS output voltage specifications (≥247 mV) when terminated to 100 Ω. Its driver strength is calibrated for 50 Ω; using 100 Ω results in ~220–295 mV differential swing, below the LVDS standard minimum. For 100 Ω systems, use PI90LV044 instead.

Does PI90LVB044QE require external biasing or termination resistors?

No external biasing is required-the device operates with internal termination and self-biased receivers. However, external 50 Ω termination must be placed at the far end of each LVDS bus segment to prevent reflections. The IC itself does not integrate termination resistors; it drives into externally provided 50 Ω loads.

Is PI90LVB044QE compatible with PCIe or SATA physical layers?

No-it is not compatible with PCIe or SATA PHY layers. PI90LVB044QE is a generic LVDS crosspoint/repeater with no protocol awareness, no embedded clock recovery, and no compliance with PCIe Gen1+/SATA 1.5/3.0 electrical specifications. It supports only baseband LVDS signaling up to 650 Mbit/s, not encoded high-speed serial protocols.