Diodes Incorporated PI5A3167CTAEX

Overview

PI5A3167CTAEX from Pericom Semiconductor is a low-voltage, single-pole single-throw (SPST) CMOS analog switch optimized for high-fidelity signal routing in battery-powered portable systems. It delivers 0.8Ω typical on-resistance at 3.0V, operates from 1.65V to 5.5V supply, supports rail-to-rail analog signals up to 5.5V, and achieves 200 MHz bandwidth - enabling use in audio paths, baseband I/O switching, and high-speed data bus isolation in mobile handsets.

For engineers reviewing the PI5A3167CTAEX datasheet, PI5A3167CTAEX pinout, PI5A3167CTAEX application, or PI5A3167CTAEX equivalent, key selection criteria include its ultra-low R_ON flatness (≤0.4Ω), power-off protection on I/O pins, 5.5V-tolerant control input independent of V_CC, and guaranteed 2ns transition speed at 5V - critical for minimizing signal distortion and timing skew in compact, low-power designs.

Technical Context

The PI5A3167CTAEX implements a single-channel SPST switch using CMOS transmission-gate architecture with matched P/N transistor sizing to minimize charge injection (<35 pC at 5V) and THD (0.015% at 2.7–4.2V). Its control logic is supply-independent, allowing direct interfacing with 1.8V GPIOs even when V_CC = 5.5V.

It features integrated power-off protection: when V_CC = 0V, I/O leakage remains ≤±5 µA across full 0–5.5V signal range. The device maintains <70 dB off-isolation over 1.65–5.5V operation and exhibits <0.4Ω R_ON flatness across 0–4.5V signal swing at 4.5V V_CC.

Key Specifications

Pinout & Package

PI5A3167CTAEX is housed in a Pb-free, RoHS-compliant SOT23-5 package (JEDEC MO-178C/AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads optimized for automated assembly and thermal dissipation in space-constrained mobile modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TS5A3167DBVR and ADG819BRMZ, PI5A3167CTAEX uniquely balances sub-1Ω R_ON, 200 MHz bandwidth, 1.65V start-up, and power-off protection - making it optimal for battery-powered systems requiring both signal fidelity and robust power management.

Availability

PI5A3167CTAEX is available at Aetrix Electronics and suitable for mobile handset design, portable instrumentation, and USB peripheral interface development requiring stable component supply across long production lifecycles.

Supply support for PI5A3167CTAEX 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 (now part of Diodes Incorporated) is a fabless semiconductor company specializing in high-performance interface, timing, and signal-integrity solutions for communications and computing markets.

The PI5A3167C series was developed specifically for low-voltage, high-fidelity analog switching in portable electronics - emphasizing ultra-low R_ON, rail-to-rail operation, and power-aware protection features.

FAQ

What is the maximum signal voltage the PI5A3167CTAEX can switch?

The PI5A3167CTAEX supports rail-to-rail analog signals from 0V to V_CC, with V_CC rated up to 5.5V. Its absolute maximum switch voltage is ±7.0V, but continuous operation above V_CC risks exceeding R_ON specifications and degrading THD performance. For reliable analog integrity, signal swing must remain within 0V to V_CC.

Does the control input require level shifting when V_CC is 1.8V?

No. The S pin tolerates up to 5.5V DC regardless of V_CC, so a 3.3V GPIO can directly drive the control input without level shifters. Logic thresholds scale with V_CC: VIH is 1.3V min at V_CC = 3.0V and 1.8V min at V_CC = 5.5V, ensuring compatibility across mixed-voltage SoC interfaces.

How does power-off protection function when V_CC = 0V?

When V_CC is unpowered, internal ESD protection diodes and isolation circuitry limit I/O leakage to ±5 µA across the full 0–5.5V signal range. This prevents back-driving powered subsystems, avoids false triggering of downstream logic, and eliminates the need for external blocking components in battery-backed or hot-swap architectures.

Can PI5A3167CTAEX replace PI5A3167CCEX in a design?

Yes - both share identical electrical specifications and pinout. The only difference is package: PI5A3167CTAEX uses SOT23-5 (TA), while PI5A3167CCEX uses SC70-5 (C). Thermal resistance differs (SOT23: 250 mW @ 85°C; SC70: 200 mW), so layout cooling and peak current must be verified if substituting in high-duty-cycle applications.