Diodes Incorporated PI5C3301CEX

Overview

PI5C3301CEX from Pericom Semiconductor is a single-bit, 5-pin SC70 packaged bus switch with active-low enable (BE), near-zero propagation delay, 5 Ω on-resistance, and ultra-low quiescent current (0.1 μA typical) for notebook and portable applications. It provides direct A-to-B signal path when enabled, introduces no ground bounce noise, and operates over –40°C to +85°C at 5 V ±10% supply.

For engineers reviewing the PI5C3301CEX datasheet, PI5C3301CEX pinout, PI5C3301CEX application, or PI5C3301CEX equivalent, key selection criteria include its low on-resistance, TTL-compatible control input, 50 pF I/O capacitance, and Pb-free SC70 package suitability for high-density, low-power digital interconnects.

Technical Context

The PI5C3301CEX implements a single-pole single-throw (SPST) analog/digital bus switch using NMOS pass-gate architecture. Its BE pin controls conduction between bidirectional I/O pins A and B, with logic-level compatibility to TTL (V_IH = 2.0 V min, V_IL = 0.8 V max) and rail-to-rail signal swing capability up to V_CC = 5.4 V.

Switching behavior is governed by on-resistance (R_ON = 10–17 Ω typical at V_CC = 4 V, I_SW = 15 mA) and parasitic capacitance (C_I/O = 5 pF typ, C_OFF = 10 pF typ), enabling sub-nanosecond RC time constants (<0.25 ns with 50 pF load) and negligible system-level propagation delay contribution.

Key Specifications

Pinout & Package

PI5C3301CEX uses a 5-pin SC70 (Package Code C) surface-mount package, measuring 2.00 mm × 1.25 mm × 0.95 mm (max height), with gull-wing leads and JEDEC MO-203B/AA compliance.

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, the PI5C3301CEX uniquely balances 5 V operation, 0.1 μA quiescent current, and 5 Ω R_ON in SC70 - making it optimal for power-sensitive, mixed-voltage portable designs requiring simple SPST control.

Availability

PI5C3301CEX is available at Aetrix Electronics and suitable for notebook design, USB peripheral multiplexing, and embedded controller debug port sharing requiring stable component supply and long-term lifecycle support.

Supply support for PI5C3301CEX 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, timing, and signal-integrity solutions, acquired by Diodes Incorporated in 2017; its legacy products remain widely deployed in industrial and computing platforms.

The PI5C3301 belongs to Pericom's SOTiny™ bus switch family, engineered specifically for low-power, low-noise digital interconnect in space-constrained portable electronics.

FAQ

What is the maximum continuous current rating for the PI5C3301CEX switch path?

The PI5C3301CEX is rated for 120 mA continuous DC current per I/O path (A or B), verified under thermal limits at T_A = +85°C and V_CC = 5.4 V. This rating assumes proper PCB copper pour and ambient airflow; derating applies above 85°C ambient.

Can the PI5C3301CEX operate with a 3.3 V supply?

No - the PI5C3301CEX is specified only for V_CC = 4.0 V to 5.4 V. At 3.3 V, the internal pass transistor fails to fully enhance, resulting in excessive R_ON (>100 Ω) and unreliable switching. Use 3.3 V–optimized alternatives like the SN74LVC1G3157 for such rails.

Is the BE pin 5 V tolerant when driven from a 3.3 V microcontroller?

Yes - the BE input meets TTL logic thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), so a 3.3 V GPIO pulling BE low (≤0.4 V) or high (≥2.4 V) will reliably control the switch without level translation.

Does the PI5C3301CEX require external pull-up resistors on A or B pins?

A pull-up resistor is recommended on either A or B during power-up per datasheet Note 1, to prevent floating states that could cause unintended current flow through internal protection diodes. Typical value is 10 kΩ to V_CC, placed on the side not actively driven.