Diodes Incorporated PI5C3383QE

Overview

PI5C3383QE from Pericom Semiconductor is a 5-bit, 4-port CMOS bus exchange switch with active-low Bus Enable (BE) and Bus Exchange (BX) control, featuring 5 Ω typical on-resistance, near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.2 μA). It enables nibble-swapped byte-level bus routing in embedded computing and memory subsystems, supporting direct AB↔CD signal path reconfiguration without added ground bounce or timing skew.

For engineers reviewing the PI5C3383QE datasheet, PI5C3383QE pinout, PI5C3383QE application, or PI5C3383QE equivalent, this device is selected for low-latency, rail-to-rail logic-controlled bus switching in space-constrained notebook and industrial control designs where power efficiency and deterministic signal path integrity are critical.

Technical Context

The PI5C3383QE implements a dual-pair bidirectional analog switch matrix controlled by BE (active-low enable) and BX (nibble-swap select), allowing four distinct functional states: disconnect (Hi-Z), straight-through (AB→CD, CD→AB), and two exchange modes (AB↔CD or CD↔AB). Its CMOS transmission-gate architecture ensures rail-to-rail input compatibility up to +5.5V independent of VCC.

Switching behavior is governed solely by RC time constant of RON (5–7 Ω) and load capacitance - no internal logic delay is introduced. Propagation delay is dominated by external driving source and load, not the device itself, making it suitable for high-speed synchronous bus interfaces requiring sub-nanosecond timing fidelity.

Key Specifications

Pinout & Package

Package: 24-pin QSOP (150-mil wide, Pb-free & Green compliant), 0.635 mm pitch, body width 3.99 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3383C and PI5C3257, the PI5C3383QE uniquely integrates nibble-swap logic and true 4-port bidirectional exchange in a single package, eliminating external logic and reducing PCB routing complexity for byte-aligned bus architectures.

Availability

PI5C3383QE is available at Aetrix Electronics and suitable for notebook system design, industrial PLC I/O modules, memory subsystems, and automated test equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for PI5C3383QE 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 of high-speed interface and signal integrity solutions, acquired by Diodes Incorporated in 2016; legacy products maintain full datasheet compliance and industrial qualification.

The PI5C3383QE belongs to Pericom's high-speed CMOS bus switch product line, designed specifically for low-latency, low-power signal path reconfiguration in portable and embedded computing platforms.

FAQ

What is the maximum allowable voltage on the BE and BX control pins?

The BE and BX pins accept –0.5 V to +5.5 V regardless of VCC level, enabling direct interfacing with 3.3 V or 5 V logic families without level shifters. This rail-to-rail input specification is guaranteed across the full operating temperature range and does not require external clamping diodes.

Can the PI5C3383QE operate with VCC = 3.3 V?

No - the PI5C3383QE is specified only for VCC = 4.5 V to 5.5 V. At 3.3 V, RON increases significantly beyond 7 Ω, propagation delay degrades, and logic thresholds (VIH/VIL) fall outside guaranteed operation. For 3.3 V systems, consider the PI3CH4812 or similar 3.3 V–optimized bus switch.

Does the device support hot insertion or live bus swapping?

Yes - the PI5C3383QE features powered-off protection: when VCC = 0 V, all I/O pins (A–D) present high impedance with ≤10 μA leakage, preventing back-driving of live buses. This allows safe insertion/removal in powered-backplane environments per JEDEC JESD78 Class II requirements.

How is the nibble-swap function implemented internally?

The BX pin controls internal transmission-gate routing to physically cross-connect A↔D and B↔C bit pairs - not through digital logic or latching. This analog path swap occurs with identical RON and capacitance as straight mode, preserving signal integrity and timing symmetry across both configurations.