Diodes Incorporated PI5C3301TEX

Overview

PI5C3301TEX from Pericom Semiconductor is a single-bit, 5-pin SOT23-packaged digital bus switch with active-low Bus Enable (BE) control, 5 Ω on-resistance, near-zero propagation delay (<2.5 ns), and ultra-low quiescent current (0.1 μA typical). It provides direct A-to-B signal path for 5 V TTL/CMOS buses in portable computing and low-power I/O expansion applications.

For engineers reviewing the PI5C3301TEX datasheet, PI5C3301TEX pinout, PI5C3301TEX application, or PI5C3301TEX equivalent, key selection criteria include its 5 Ω analog switch resistance, active-low enable timing (tEN = 0.1 ns min), 50 pF input/output capacitance, 120 mA output current rating, and Pb-free SOT23-5 package compatibility with space-constrained PCB layouts.

Technical Context

The PI5C3301TEX implements a single-pole, single-throw (SPST) FET-based analog switch controlled by an active-low BE input. Its internal structure eliminates added propagation delay beyond RC time constant (≈0.25 ns with 50 pF load), and it operates only within the 4.5–5.5 V supply range with no level-shifting capability.

It features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), supports bidirectional signal flow between A and B pins when enabled, and draws negligible supply current in both enabled (ICC = 0.3 μA typ) and disabled (ICC = 0.1 μA typ) states - critical for battery-powered systems.

Key Specifications

Pinout & Package

PI5C3301TEX is housed in a Pb-free, RoHS-compliant 5-pin SOT23 package (JEDEC MO-178AA), with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and 1.1 mm height. Pin 1 is BE (active-low enable), Pin 2 is A (bidirectional I/O), Pin 3 is B (bidirectional I/O), Pin 4 is VCC, and Pin 5 is GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3125DBVR and NC7SZ19P5X, PI5C3301TEX delivers the lowest on-resistance (5 Ω) and quiescent current (0.1 μA) in a minimal 5-pin SOT23 footprint - making it optimal for space- and power-constrained single-signal gating where signal fidelity and standby efficiency are primary.

Availability

PI5C3301TEX is available at Aetrix Electronics and suitable for notebook I/O expansion, USB peripheral power management, and industrial control panel interface applications requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3301TEX 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 timing solutions, acquired by Diodes Incorporated in 2016; its legacy bus switch portfolio remains widely deployed in computing and industrial designs.

The PI5C3301 belongs to Pericom's SOTiny™ family of ultra-small, low-power analog switches - engineered specifically for portable electronics I/O isolation and signal routing where board space and battery life are critical constraints.

FAQ

Is PI5C3301TEX compatible with 3.3 V logic systems?

No. PI5C3301TEX requires a 4.5–5.5 V supply and has TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), but its internal switch FETs are optimized for 5 V operation. Driving BE or passing signals at 3.3 V violates the minimum VCC specification and risks unreliable switching or increased on-resistance.

Can PI5C3301TEX be used for analog signal switching (e.g., audio or sensor signals)?

Yes, but only for DC-coupled, rail-to-rail 0–5 V signals with bandwidth below ~100 MHz. Its 5 Ω RON and 5 pF output capacitance yield a -3 dB point above 600 MHz, but THD and crosstalk are not characterized for analog applications - intended primarily for digital bus gating.

What is the maximum capacitive load the PI5C3301TEX can drive reliably?

The datasheet specifies performance up to 50 pF load capacitance with guaranteed propagation delay and rise/fall times. For loads exceeding 50 pF, RC delay increases linearly (τ = RON × CL); at 100 pF, delay rises to ~0.5 ns - still usable in non-critical timing paths but not recommended for high-speed synchronous buses.

Does PI5C3301TEX require external pull-up resistors on A or B pins?

Yes - the datasheet explicitly recommends a pull-up resistor on the A or B pin for power-up protection, as the switch enters high-impedance state at power-on until BE is asserted. A 10 kΩ resistor to VCC prevents floating inputs and ensures defined logic levels during boot sequences.