Diodes Incorporated PI3A3899ZTAEX

Overview

PI3A3899ZTAEX from Diodes Incorporated is a dual DPDT (double-pole, double-throw) CMOS analog switch optimized for low-power audio routing and dual-SIM card switching in portable devices. It operates from 1.65V to 4.3V, delivers 2.0Ω typical on-resistance at 3.0V, supports rail-to-rail signal switching, and features 10ns typical turn-on time with -100dB crosstalk rejection at 1MHz - enabling clean signal path selection in space-constrained mobile handsets.

For engineers reviewing the PI3A3899ZTAEX datasheet, PI3A3899ZTAEX pinout, PI3A3899ZTAEX application, or PI3A3899ZTAEX equivalent, key selection criteria include its dual independent DPDT topology, 330MHz bandwidth, ±400mA continuous current rating per channel, 8kV I/O-to-GND ESD robustness, and UQFN16 (1.8mm × 2.6mm) package compatibility with high-density PCB layouts.

Technical Context

The PI3A3899 implements two fully independent DPDT switch matrices, each with four signal paths (NO/NC/COM pairs), controlled by separate logic inputs A0 and A1. Its CMOS architecture enables bidirectional analog signal routing across the full VCC range without polarity constraints.

Each switch exhibits matched on-resistance (ΔRON ≤ 0.2Ω), low charge injection (13pC), and flat on-resistance over the signal range - critical for minimizing distortion in audio and high-fidelity data switching. Off-isolation (-67dB at 1MHz) and crosstalk rejection (-100dB) are maintained across -40°C to +85°C.

Key Specifications

Pinout & Package

Package: 16-pin UQFN (ZTA), 1.8mm × 2.6mm, 0.4mm pitch, exposed thermal pad - optimized for thermal dissipation and board-area efficiency in slim mobile designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual DPDT analog switching applications.

Compared with TMUX1574RTER and ADG732BSUZ, the PI3A3899ZTAEX uniquely combines 5V-tolerant controls, 8kV I/O ESD, dual DPDT topology, and 330MHz bandwidth in a 1.8mm × 2.6mm footprint - making it the only solution qualified for production dual-SIM handset designs without supplemental protection or level-shifting circuitry.

Availability

PI3A3899ZTAEX is available at Aetrix Electronics and suitable for smartphone dual-SIM switching, portable audio source routing, and industrial handheld scanner interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for PI3A3899ZTAEX 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, specializing in high-performance, energy-efficient solutions for consumer, industrial, and communications markets.

The PI3A3899 belongs to Diodes' high-speed analog switch product line, engineered specifically for low-distortion, low-power signal routing in battery-operated portable electronics with stringent ESD and size constraints.

FAQ

Can PI3A3899ZTAEX operate with a 1.8V supply and 3.3V control signals?

Yes. The device supports VCC from 1.65V to 4.3V and accepts control inputs up to 5V regardless of supply voltage. At 1.8V VCC, A0/A1 tolerate 0–3.3V logic levels without damage or functional degradation, enabling direct interfacing with 1.8V microcontrollers and 3.3V PMICs in mixed-voltage systems.

What is the maximum continuous current per switch channel?

The PI3A3899ZTAEX supports ±400mA continuous current through any NO, NC, or COM terminal under recommended operating conditions. This rating applies across the full -40°C to +85°C ambient range and is validated with proper PCB copper pour and thermal relief design per Diodes' UQFN layout guidelines.

Does the device require external pull-up or pull-down resistors on A0/A1?

No. Control inputs A0 and A1 have no internal termination; however, the datasheet explicitly states they must not float. External 100kΩ pull-down resistors are recommended for default LOW-state initialization in dual-SIM applications to ensure NC paths are engaged at power-up before firmware asserts control.

How does the 330MHz bandwidth impact audio performance?

The 330MHz small-signal bandwidth ensures negligible phase shift and amplitude roll-off below 20kHz - preserving full fidelity in wideband audio paths. Measured THD remains below 0.03% at 1kHz with 1V_PP into 32Ω, confirming suitability for high-resolution playback and recording without added gain stages or compensation networks.