Diodes Incorporated PI3A212ZLEX

Overview

PI3A212ZLEX from Pericom Semiconductor is a dual SPDT analog switch fabricated in CMOS technology, designed for audio/video signal routing and power routing in portable electronics. It features 0.6Ω on-resistance at 2.7V, rail-to-rail signal handling (–0.3V to V_CC), –75dB off-isolation at 100kHz, –90dB crosstalk rejection at 100kHz, and break-before-make switching. Used in cell phones and headset switching where low distortion and fast switching are critical.

For engineers reviewing the PI3A212ZLEX datasheet, PI3A212ZLEX pinout, PI3A212ZLEX application, or PI3A212ZLEX equivalent, key selection criteria include on-resistance flatness (0.2Ω), 60MHz 3dB bandwidth, 15ns turn-on time, charge injection (55pC), and TQFN-10 (ZL10) package compatibility with high-density portable PCB layouts.

Technical Context

The PI3A212ZLEX implements two independent SPDT switches with complementary control logic (IN1/IN2), each selecting between NO and NC paths to a shared COM terminal. Its CMOS architecture enables rail-to-rail analog operation across 2.7V–4.2V ±10% supply, with matched on-resistance (ΔR_ON ≤ 0.06Ω) and low capacitance (95pF on, 35pF off).

Break-before-make timing (t_BBM = 20ns min) ensures no signal shorting during state transitions. AC performance is characterized with 50Ω source/load and 35pF load capacitance, delivering 25ns max t_ON, 10ns max t_OFF, and –75dB off-isolation up to 100kHz - critical for preserving signal integrity in audio and bus-switching applications.

Key Specifications

Pinout & Package

PI3A212ZLEX is housed in a Pb-free, green 10-contact Thin Quad Flat No-Lead (TQFN) package, code ZL10 (3mm × 3mm, 0.5mm pitch, 0.8mm height), optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual SPDT analog switch applications.

Compared with TS3A227E and ADG726, PI3A212ZLEX offers the lowest on-resistance (0.6Ω) and optimal fit for battery-powered portable audio routing where supply headroom is limited to 2.7–4.2V and board area is constrained by its 3×3mm TQFN package.

Availability

PI3A212ZLEX is available at Aetrix Electronics and suitable for cell phone audio routing, portable instrumentation signal path management, and USB 1.1 data line switching requiring stable component supply across production lifecycles.

Supply support for PI3A212ZLEX 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-performance interface, timing, and signal integrity solutions, acquired by Diodes Incorporated in 2016; legacy products maintain full technical documentation and long-term support.

The PI3A212 belongs to Pericom's analog switch product line, engineered for low-distortion, low-power signal routing in battery-operated consumer electronics with strict size and thermal constraints.

FAQ

What is the maximum allowable signal voltage swing for PI3A212ZLEX?

The device supports rail-to-rail analog operation from –0.3V to V_CC. With V_CC = 4.2V ±10%, the absolute maximum signal range is –0.3V to +4.6V. Exceeding these limits risks damage due to ESD diode conduction; input clamping occurs beyond –0.5V or V_CC +0.5V per absolute maximum ratings.

Does PI3A212ZLEX require external pull-up or pull-down resistors on IN1/IN2?

No external biasing is required. The control inputs have defined VIH (≥1.3V) and VIL (≤0.6V) thresholds with 100mV hysteresis, and input leakage is ±0.5µA. However, floating inputs must be avoided - tie unused IN pins to GND or V_CC to prevent undefined switching states and increased ICC.

Can PI3A212ZLEX be used to switch DC power rails up to 300mA?

Yes - it supports continuous DC current up to ±300mA per NO/NC/COM path. Derating is required above +85°C ambient; at 85°C, maximum power dissipation is 250mW. For 300mA through 0.6Ω, power loss is 54mW, well within thermal limits when using recommended PCB copper pour for ZL10 package.

How does break-before-make timing affect audio click/pop performance?

The guaranteed 20ns minimum break interval eliminates simultaneous conduction between NC and NO paths, preventing transient short-circuits that cause audible clicks. Combined with low charge injection (55pC), this ensures clean transitions during headset or speaker path switching without requiring external mute circuitry.