Diodes Incorporated PI5C3383Q

Overview

PI5C3383Q from Pericom Semiconductor is a 5-bit, 4-port CMOS bus exchange switch with active-low Bus Enable (BE) and Bus Exchange (BX) control, enabling nibble-swapped byte-level bus routing. It features 5 Ω typical on-resistance, near-zero propagation delay (0.25 ns), ultra-low quiescent current (0.2 μA), and operates at 5 V ±5% over –40°C to +85°C ambient. It is used in notebook systems for low-power, low-noise bus reconfiguration.

For engineers reviewing the PI5C3383Q datasheet, PI5C3383Q pinout, PI5C3383Q application, or PI5C3383Q equivalent, key selection criteria include its 5 Ω R_ON, 0.25 ns t_PLH/t_PHL, BE/BX dual-control logic, QSOP-24 package compatibility, and rail-to-rail logic input tolerance up to +5.5 V independent of V_CC.

Technical Context

The PI5C3383Q implements a bidirectional, low-R_ON analog switch matrix with two independent 5-bit port pairs (AB and CD), controlled by BE (enable/disable) and BX (swap/non-swap). Its CMOS transmission-gate architecture ensures no added propagation delay beyond RC time constant (RON × C_LOAD).

It supports rail-to-rail logic inputs (0 V to +5.5 V) regardless of V_CC, eliminates ground bounce noise during switching, and maintains high-impedance outputs when disabled - critical for hot-swap and multi-drop bus isolation in portable computing interfaces.

Key Specifications

Pinout & Package

PI5C3383Q is housed in a 24-pin, 150-mil wide plastic QSOP (Quad Small Outline Package) with 0.635 mm pitch, JEDEC MS-013 compliant, lead-free and RoHS-compliant options available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3383CDW and PI5C3257QE, the PI5C3383Q uniquely delivers true 4-port exchange with nibble-swapping in a low-power QSOP-24 package - making it optimal for space- and energy-constrained notebook bus architectures requiring dynamic byte reordering.

Availability

PI5C3383Q is available at Aetrix Electronics and suitable for notebook memory routing, embedded peripheral multiplexing, low-delay barrel shifter cores, and hot-swappable I/O expansion requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3383Q 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; its legacy timing, switching, and signal conditioning products remain widely deployed in computing and communications infrastructure.

The PI5C3383Q belongs to Pericom's PI5C family of low-R_ON, low-delay CMOS bus switches - designed specifically for power-sensitive, timing-critical bus reconfiguration in portable computing and embedded systems.

FAQ

What is the maximum allowable voltage on BE and BX control pins when V_CC = 5.0 V?

The BE and BX pins tolerate input voltages from –0.5 V to +5.5 V regardless of V_CC, per datasheet Section "Logic Inputs". This rail-to-rail capability allows direct interfacing with 3.3 V or 5 V controllers without level-shifting, provided absolute max ratings (–0.5 V to +7.0 V) are never exceeded.

Can PI5C3383Q be used with V_CC = 3.3 V?

No - the PI5C3383Q is specified only for V_CC = 4.5 V to 5.5 V. Its R_ON, propagation delay, and logic thresholds are characterized and guaranteed exclusively within this range. Operation at 3.3 V is outside specification and may result in undefined switching behavior or excessive R_ON.

Does the device support hot insertion when BE is held HIGH?

Yes - with BE = HIGH, all AB and CD ports enter high-impedance state, isolating upstream and downstream buses. This prevents signal contention during live insertion, satisfying hot-swap requirements in modular I/O designs, provided V_CC sequencing (power before signals) is maintained.

How does the BX pin affect signal routing when BE is LOW?

When BE = LOW, BX determines nibble mapping: BX = LOW connects A→C and B→D; BX = HIGH exchanges paths to A→D and B→C. This enables byte-level bus swapping without external logic, supporting dynamic memory interleaving or protocol byte-order correction in real time.