Diodes Incorporated PI3B3384LE

Overview

PI3B3384LE from Pericom Semiconductor is a 3.3 V, 10-bit, dual-port bus switch with two independent 5-bit enable controls (BEA/BEB), 5 Ω typical on-resistance, 4.5 ns max switching time, and ultra-low quiescent current (0.1 μA typical), used for high-speed signal routing in notebook and portable computing I/O expansion paths.

For engineers reviewing the PI3B3384LE datasheet, PI3B3384LE pinout, PI3B3384LE application, or PI3B3384LE equivalent, key selection criteria include bus isolation timing, low-voltage rail compatibility (3.3 V ±10%), dual independent port control, and Pb-free TSSOP-24 packaging for space-constrained PCB layouts.

Technical Context

The PI3B3384LE implements a CMOS-based analog bus switch architecture with no internal logic propagation delay-signal delay arises solely from R_ON-C_LOAD time constant (~0.25 ns for 50 pF load). It supports rail-to-rail input logic (0–3.6 V) independent of V_CC, enabling mixed-voltage interface bridging.

Each port pair (A0–A4/B0–B4 and A5–A9/B5–B9) is controlled separately by active-low BEA and BEB signals, allowing selective 5-bit channel activation. The device operates across –40°C to +85°C ambient with V_CC = 3.3 V ±10% and tolerates supply transients from –0.5 V to +4.6 V.

Key Specifications

Pinout & Package

PI3B3384LE is housed in a 24-pin Pb-free and Green-compliant TSSOP package (173-mil width), with 0.65 mm pitch, 0.1 mm max lead thickness, and 7.7 mm × 4.4 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3384CPWR and PI3CH480LE, PI3B3384LE uniquely delivers dual 5-bit independent enables, rail-to-rail input tolerance, and sub-5 ns switching within a 3.3 V system-making it optimal for dynamic I/O resource partitioning in portable and embedded platforms.

Availability

PI3B3384LE is available at Aetrix Electronics and suitable for notebook I/O expansion, PCIe slot multiplexing, and industrial backplane interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI3B3384LE 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 was a fabless provider specializing in high-speed interface and signal-integrity solutions before its acquisition by Diodes Incorporated in 2016; its legacy portfolio remains widely deployed in computing and communications infrastructure.

The PI3B3384 belongs to Pericom's NanoSwitch™ family-designed specifically for low-latency, low-power bus switching in portable and space-constrained embedded systems where signal fidelity and power efficiency are critical.

FAQ

Can PI3B3384LE operate with V_CC = 2.5 V?

No. The device is specified only for V_CC = 3.3 V ±10% (2.97–3.63 V). At 2.5 V, R_ON increases beyond 17 Ω, t_SW degrades significantly, and VIH/VIL thresholds fall outside guaranteed logic levels-operation is not characterized or supported.

Does PI3B3384LE require external pull-up resistors on BEA/BEB pins?

No. BEA and BEB are active-low CMOS inputs with ±1 μA leakage over temperature; they may be driven directly from FPGA or ASIC GPIOs. Pull-ups are unnecessary unless open-drain control sources are used-then 10 kΩ to V_CC is recommended.

What is the maximum capacitive load the PI3B3384LE can drive reliably?

The device maintains 4.5 ns max switching time up to 50 pF total load capacitance (including trace + receiver input). Beyond 50 pF, rise/fall times increase linearly with √C_LOAD; for 100 pF loads, t_SW ≈ 6.4 ns-still functional but marginally compliant with 200 MHz timing budgets.

Is PI3B3384LE pin-compatible with PI3B3384L?

Yes. PI3B3384LE and PI3B3384L share identical pinout, electrical specifications, and mechanical footprint-the "E" suffix denotes Pb-free/Green compliance only; no functional or layout changes are introduced.