STMicroelectronics STG6384QTR

Overview

STG6384QTR from STMicroelectronics is a high-speed dual SPST analog switch in QFN10L (1.8 × 1.4 mm) package, operating from 1.65 V to 4.3 V single supply. It delivers ultra-high off-isolation (−80 dB at 1 MHz), ultra-low quiescent current (0.2 μA max at 85 °C), and low on-resistance (1.30 Ω max at 4.3 V), enabling precision signal routing in battery-powered portable audio and sensor interfaces.

For engineers reviewing the STG6384QTR datasheet, STG6384QTR pinout, STG6384QTR application, or STG6384QTR equivalent, this page provides verified electrical parameters, validated dual-channel switching behavior, real-world bandwidth (65 MHz typical), ESD-protected control inputs, and direct package-to-layout mechanical data for PCB integration.

Technical Context

The STG6384 implements two independent CMOS transmission gates using C2MOS silicon gate technology, each controlled by dedicated SELn inputs with 1.8 V–4.3 V compatible thresholds. Its logic is non-inverting: SELn = HIGH connects Sn to Dn; SELn = LOW places Sn/Dn in high-impedance isolation.

It achieves −80 dB off-isolation and −85 dB crosstalk at 1 MHz due to optimized channel geometry and guard-ring layout, while maintaining 58 MHz −3 dB bandwidth under 50 Ω load. Charge injection is specified at 43–51 pC, supporting low-distortion sampling in precision ADC front-ends.

Key Specifications

Pinout & Package

STG6384QTR uses a 10-pin QFN10L package (1.8 mm × 1.4 mm, 0.4 mm pitch) with exposed thermal pad. Pin 1 is top-left corner (marked via laser etch); pins 1–5 run left-to-right, 6–10 bottom-to-top on right side. NC pins (1, 6) must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMUX6208PWR and ADG721BRMZ, STG6384QTR uniquely balances ultra-low ICC (0.2 μA), 1.65 V operation, and −80 dB isolation in a 1.8 × 1.4 mm QFN-making it optimal for space-constrained, long-life portable designs where leakage and crosstalk are critical.

Availability

STG6384QTR is available at Aetrix Electronics and suitable for portable audio multiplexers, medical sensor front-ends, and USB-C accessory switching requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for STG6384QTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, analog switches, and MEMS sensors for automotive, industrial, and consumer markets.

The STG6384 belongs to ST's low-voltage analog switch product line, engineered specifically for energy-efficient portable electronics requiring rail-to-rail signal integrity, minimal power overhead, and robust ESD protection in miniature packages.

FAQ

What is the maximum allowable signal voltage swing across S1/D1 or S2/D2 terminals?

The STG6384 supports rail-to-rail analog signals: the maximum voltage swing equals the VCC supply voltage, ranging from 1.65 V to 4.3 V. Input signals must stay within 0 V to VCC to avoid forward-biasing internal ESD diodes, which could increase leakage or cause latch-up.

Can SEL1 and SEL2 be driven directly from a 1.8 V GPIO without level shifting?

Yes. The SEL inputs are 1.8 V compatible across the full VCC range (1.65–4.3 V). VIH(min) is 0.65 × VCC - at VCC = 1.65 V, VIH(min) = 1.07 V, well below 1.8 V logic HIGH. No level shifter is needed for standard 1.8 V CMOS outputs.

Is the exposed thermal pad (EPAD) electrically connected internally?

No. The EPAD on the QFN10L package is not internally connected to any die node. It may be soldered to a PCB ground plane for thermal enhancement but must not be tied to VCC or signal nets. ST recommends connecting it to GND for improved thermal dissipation and EMI shielding.

Does STG6384QTR support hot insertion or live signal switching?

Yes. With its 100 mA latch-up immunity (JESD78 Class II) and ±300 mA continuous output current rating, the STG6384QTR tolerates transient overcurrent during live switching. However, ensure signal slew rates comply with dt/dv limits (≤20 ns/V at VCC ≤ 2.7 V) to prevent false triggering.