Diodes Incorporated PI5C3400S

Overview

PI5C3400S from Pericom Semiconductor is a 4-bit, 4-port bus exchange switch with individual bit-swap control via BX0–BX3 inputs, zero propagation delay, 5 Ω ON-resistance, and active-low Bus Enable (BE). It directly connects A/B and C/D buses in flow-through or exchanged configurations for high-speed digital interconnect in notebook and embedded systems.

For engineers reviewing the PI5C3400S datasheet, PI5C3400S pinout, PI5C3400S application, or PI5C3400S equivalent, key selection criteria include bus exchange timing (tBX ≤ 6.5 ns), ultra-low quiescent current (0.2 µA typical), 5 V operation, and SOIC-24 package compatibility with legacy logic routing.

Technical Context

The PI5C3400S implements four independent bilateral analog switches per bit, each controlled by BE and one BX signal to select between AB↔CD pass-through or AB↔DC exchange modes. Its 0.8 µm CMOS process enables 5 Ω R_ON and sub-nanosecond tPLH/tPHL (0.25 ns typical) without added ground bounce.

Switching is purely resistive-no latching, clocking, or level-shifting-making it suitable for bidirectional TTL/CMOS bus bridging where signal integrity and deterministic latency are critical. All I/O tolerate –0.5 V to +7.0 V, supporting hot-swap and mixed-voltage domain interfacing.

Key Specifications

Pinout & Package

PI5C3400S is housed in a 24-pin 300-mil wide plastic SOIC (Small Outline Integrated Circuit) package with standard JEDEC MS-013AC footprint and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3244DBR and PI5C3257LEX, the PI5C3400S uniquely delivers per-bit exchange control in a compact SOIC-24, making it the only option for applications requiring runtime bit-level bus topology reconfiguration without added logic overhead.

Availability

PI5C3400S is available at Aetrix Electronics and suitable for notebook design, industrial PLC I/O modules, PCI Express lane management, and legacy bus bridging requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3400S 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 logic portfolio remains widely deployed in industrial and computing applications.

The PI5C series targets low-latency, low-power digital interconnect in portable and embedded systems, emphasizing zero-delay switching, ultra-low static current, and robust mixed-signal I/O tolerance.

FAQ

What is the maximum capacitive load the PI5C3400S can drive while maintaining specified timing?

The PI5C3400S is characterized for 50 pF load capacitance with tPLH/tPHL ≤ 0.25 ns. Its 5 Ω R_ON forms an RC network with load; for loads up to 100 pF, rise/fall times remain within 10% of unloaded values. Driving >100 pF may degrade edge rates but does not affect logic functionality or DC specs.

Can PI5C3400S operate with 3.3 V logic levels?

No. The PI5C3400S requires VCC = 4.5 V to 5.5 V and is not 3.3 V tolerant on control inputs. VIH is guaranteed ≥2.0 V, but operation below 4.5 V violates Absolute Maximum Ratings for VCC and risks undefined switching behavior or increased R_ON.

Is the NC pin (Pin 12) required to be grounded or left floating?

Pin 12 is internally unconnected and must be left floating per Pericom's design guidance. Grounding it may cause unintended leakage paths or violate internal ESD protection layout; no performance benefit or reliability improvement results from tying NC to GND.

How does the PI5C3400S handle simultaneous switching of multiple bits?

All four bit channels switch independently but share the same BE and VCC/GND rails. No timing skew is introduced between bits-the tBX specification (1.5–6.5 ns) applies identically to BX0–BX3. Ground bounce is eliminated by flow-through architecture, so simultaneous toggling of all BX lines causes no additional noise.