Diodes Incorporated PI5C3303TEX

Overview

PI5C3303TEX from Diodes Incorporated is a single 2:1 analog/digital bus switch with active-HIGH Bus Enable (BE), 5Ω typical on-resistance, near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.1 µA). It directly connects either A or B to C in notebook, portable, and low-power I/O routing applications.

For engineers reviewing the PI5C3303TEX datasheet, PI5C3303TEX pinout, PI5C3303TEX application, or PI5C3303TEX equivalent, key selection criteria include on-resistance matching, enable timing (tPZH/tPHZ ≤ 5.5 ns), rail-to-rail signal handling (–0.5 V to +7.0 V), and SOT23-6 footprint compatibility for space-constrained PCB layouts.

Technical Context

The PI5C3303TEX implements a passive FET-based transmission gate architecture with no internal logic or level-shifting-signals pass bidirectionally with minimal RC distortion. Its BE-controlled switching path maintains signal integrity across DC to >100 MHz by limiting on-capacitance (CON = 12 pF) and off-capacitance (COFF = 5 pF).

It operates over –40°C to +85°C ambient with VCC = 4.0 V to 4.5 V, supports TTL-compatible control inputs (VIH = 2.0 V min), and draws only 0.1 µA ICC in disabled state-enabling use in always-on system management buses without compromising battery life.

Key Specifications

Pinout & Package

Package: 6-pin SOT23 (T), 1.6 mm × 2.9 mm × 1.1 mm body, gull-wing leads, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2:1 analog/digital bus switch applications.

Compared with TS3A226AEYZR and SN74CBT3244PW, the PI5C3303TEX offers lowest on-resistance and quiescent current in a minimal 6-pin SOT23 package-making it optimal for ultra-low-power, space-constrained, single-path I/O routing where ESD headroom and multi-bit control are not required.

Availability

PI5C3303TEX is available at Aetrix Electronics and suitable for USB 1.1 interface switching, notebook system management bus isolation, and legacy PCI slot sharing requiring stable component supply and long-term industrial availability.

Supply support for PI5C3303TEX 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 is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The PI5C3303TEX belongs to Diodes' Pericom® high-speed analog switch product line, engineered specifically for low-latency, low-power I/O signal routing in portable computing and embedded control systems.

FAQ

What is the maximum signal voltage the PI5C3303TEX can pass?

The PI5C3303TEX supports signal voltages from –0.5 V to +7.0 V relative to GND, regardless of VCC level. This rail-to-rail capability allows it to pass analog signals, negative transients, or mixed-voltage digital logic (e.g., 3.3 V signals into a 5 V domain) without clamping or distortion-provided VCC is within its operating range (4.0–4.5 V).

Does the PI5C3303TEX require external pull-up or pull-down resistors on the BE pin?

No. The BE pin has TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and negligible input current (±1 µA), so it can be driven directly from standard logic outputs without external biasing. Pull-up resistors are unnecessary unless open-drain control sources are used, in which case a 10 kΩ pull-up to VCC is recommended.

Can the PI5C3303TEX be used in bidirectional I²C applications?

Yes, but only for non-critical, low-speed I²C segments (≤100 kHz) where RON-induced voltage drop and capacitance loading are acceptable. Its 5 Ω RON adds minimal IR drop, and 12 pF CON is within I²C bus capacitance limits. However, it lacks built-in level shifting or slew-rate control-so external pull-ups must be sized accordingly, and arbitration timing should be verified.

Is the PI5C3303TEX pin-compatible with other Pericom 2:1 switches like the PI5C3253?

No. The PI5C3303TEX uses a 6-pin SOT23 package with BE/A/B/C/VCC/GND pinout, while the PI5C3253 is an 16-pin SOIC device with dual 4:1 configuration, separate enable pins, and different signal routing. They share functional similarity but differ in package, pin count, channel count, and control architecture-requiring PCB redesign for substitution.