Diodes Incorporated PI3C3861LE

Overview

PI3C3861LE from Diodes Incorporated (acquired Pericom) is a 10-bit, 2-port bus switch with 5 Ω on-resistance, rail-to-rail 2.5 V/3.3 V operation, and 5 V I/O tolerance-designed for high-bandwidth signal routing in hot-insertion systems such as PCIe add-in cards and modular backplanes.

For engineers reviewing the PI3C3861LE datasheet, PI3C3861LE pinout, PI3C3861LE application, or PI3C3861LE equivalent, key selection criteria include bus enable timing (tPZH ≤ 9.8 ns), propagation delay (≤0.25 ns), on-resistance matching (5–7 Ω), hot-insertion support, and TSSOP-24 package compatibility with high-density PCB layouts.

Technical Context

The PI3C3861LE implements a passive analog switch architecture with no internal logic or level-shifting circuitry-switching is purely controlled by the active-low BE signal. Its 5 Ω R_ON and 10 pF C_ON yield an RC time constant of ~0.25 ns under 50 pF load, ensuring negligible added propagation delay.

It supports bidirectional signal flow between Bus A (A0–A9) and Bus B (B0–B9), with all I/O pins rated for –0.5 V to +5.5 V DC and tolerant of 5 V signals while operating from 2.5 V or 3.3 V supply. No power sequencing is required for hot-insertion compliance.

Key Specifications

Pinout & Package

PI3C3861LE is housed in a Pb-free, green-compliant 24-pin TSSOP (173-mil wide) package with 0.65 mm pitch and exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit bus switch applications.

Compared with SN74CBT3384APW and PI3CHD3224LE, PI3C3861LE uniquely balances 2.5 V/3.3 V dual-supply operation, 5 V I/O tolerance, and sub-nanosecond timing-making it optimal for mixed-voltage hot-swap architectures where signal integrity and supply flexibility are co-critical.

Availability

PI3C3861LE is available at Aetrix Electronics and suitable for PCIe add-in card design, modular backplane interconnect, and DDR memory subsystem isolation requiring stable component supply across extended product lifecycles.

Supply support for PI3C3861LE 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 acquired Pericom Semiconductor in 2017 and integrates its high-speed interface portfolio-including bus switches, clock buffers, and USB/PCIe redrivers-into broad analog and mixed-signal solutions.

The PI3C3861LE belongs to Pericom's legacy "PI3C" bus switch family, engineered specifically for low-latency, high-fidelity signal routing in hot-pluggable computing and communications infrastructure.

FAQ

Does PI3C3861LE require external pull-up or pull-down resistors on the BE pin?

No. The BE pin has internal weak pull-down circuitry (typical 100 kΩ) ensuring default HIGH-Z state at power-up. External resistors are unnecessary unless specific timing or noise immunity requirements dictate stronger biasing in noisy environments.

Can PI3C3861LE be used to switch differential signals like LVDS or HDMI?

No. It is a single-ended CMOS bus switch optimized for parallel digital buses (e.g., address, control, SMBus). Differential pairs require matched impedance, skew control, and common-mode handling not provided by this device's architecture.

What is the maximum continuous current rating per A/B pin?

Each A or B pin supports up to 120 mA DC output current. This rating applies to steady-state conditions-not peak transient currents-and assumes proper PCB thermal relief and ambient temperature ≤ +85°C.

Is PI3C3861LE compatible with lead-free reflow profiles per JEDEC J-STD-020?

Yes. Its Pb-free TSSOP-24 package is qualified for standard lead-free reflow with peak temperature up to 260°C (MSL1), and thermal characteristics are documented in Diodes' packaging database (pericom.com/packaging/).