Diodes Incorporated PI3C3305LE

Overview

PI3C3305LE from Diodes Incorporated is a 2.5V/3.3V, 2-bit, dual-channel bus switch with individual active-HIGH enables, designed for high-bandwidth signal routing in digital interconnects. It features 5Ω on-resistance, <0.25ns propagation delay (A↔B), >400MHz bandwidth, and 5V-tolerant I/O - enabling clean switching of DDR, PCIe, or USB data lines in hot-insertion-capable systems.

For engineers reviewing the PI3C3305LE datasheet, PI3C3305LE pinout, PI3C3305LE application, or PI3C3305LE equivalent, key selection criteria include enable polarity (active-HIGH), rail-to-rail 2.5V/3.3V operation, 5V I/O tolerance, hot-insertion support, and low-impedance bidirectional switching without added ground bounce.

Technical Context

The PI3C3305LE implements two independent FET-based analog switches controlled by separate BE1/BE2 inputs. Each switch connects A1↔B1 or A2↔B2 with no logic inversion, zero added propagation delay beyond RC time constant (~0.25ns into 50pF), and rail-to-rail voltage handling from 0V to VCC (2.5V or 3.3V).

Its CMOS architecture supports 5V-tolerant control and I/O pins regardless of supply voltage, enabling mixed-voltage domain interfacing. The device operates across –40°C to +85°C ambient with quiescent current ≤500µA and withstands 120mA per channel output current.

Key Specifications

Pinout & Package

PI3C3305LE is packaged in an 8-pin, 173-mil wide plastic TSSOP (Package Code L), with 0.65mm pitch and exposed pad not present. Pin mapping is validated per DS40259 Rev 1-2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus switch applications.

Compared with PI3C3306LE and SN74CBT3244PWR, the PI3C3305LE uniquely combines active-HIGH per-channel enables, 5V I/O tolerance, and verified hot-insertion behavior - making it optimal for dynamic, mixed-voltage, field-serviceable interconnects.

Availability

PI3C3305LE is available at Aetrix Electronics and suitable for DDR memory arbitration, USB 2.0 docking, and PCIe lane multiplexing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI3C3305LE 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance analog, logic, and power management solutions for industrial, computing, and communications markets.

The PI3C3305LE belongs to Diodes' Pericom® high-speed interface product line, engineered specifically for low-latency, high-fidelity signal routing in hot-pluggable digital systems with mixed-voltage I/O requirements.

FAQ

What is the maximum operating frequency supported by PI3C3305LE?

The PI3C3305LE is characterized for >400MHz bandwidth, supporting data rates up to ~2 Gbps NRZ. Its 5Ω RON and 5pF COFF ensure minimal signal distortion, and measured propagation delay remains below 0.25ns into 50pF loads - making it suitable for DDR3, USB 2.0, and PCIe Gen2 applications where timing integrity is critical.

Can PI3C3305LE be used with a 2.5V supply and 5V input signals?

Yes. The PI3C3305LE supports 2.5V or 3.3V VCC operation while allowing DC input voltages from –0.5V to +5.5V on all A/B/BE pins. This 5V I/O tolerance enables safe interfacing with 5V logic sources even when powered from 2.5V - eliminating external level shifters in mixed-voltage designs.

How does the PI3C3305LE handle power sequencing during hot insertion?

During hot insertion, the PI3C3305LE enters a high-impedance OFF-state when VCC is absent or below threshold. Its design prevents ground bounce and bus contention: BE pins float high (due to internal weak pull-ups per datasheet note), but A/B pins remain isolated until VCC stabilizes and BE is actively driven. No external power sequencing circuitry is required.

Is there a pin-compatible alternative with active-LOW enables?

Yes - the PI3C3306LE shares identical pinout, package (TSSOP-8), and electrical specifications except for enable polarity: BE1/BE2 are active-LOW. It is a direct drop-in replacement when control logic drives enables low-active, and both parts share the same thermal and layout footprint per DS40259 Rev 1-2.