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Home > Products > Integrated Circuits (ICs) > Interface > Analog Switches, Multiplexers, Demultiplexers

STMicroelectronics STG4210QTR

Name: STG4210QTR
Brand: STMicroelectronics
SKU: STG4210QTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STG4210QTR

Manufacturer:: STMicroelectronics

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: 10-UFQFN

Datasheet:: STG4210QTR.pdf

Description:: IC SWITCH SPST-NOX2 1.3OHM 10QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STG4210QTR from STMicroelectronics is a dual single-pole single-throw (SPST) analog switch in QFN10L (1.8 × 1.4 mm) package, operating from 1.65 V to 4.3 V supply, with R_PEAK ≤ 1.30 Ω at 4.3 V, ICC ≤ 0.2 μA at 85 °C, and −3 dB bandwidth of 58 MHz - used for signal routing in portable audio and low-voltage sensor interfaces.

For engineers reviewing the STG4210QTR datasheet, STG4210QTR pinout, STG4210QTR application, or STG4210QTR equivalent, key selection criteria include ON-resistance flatness (≤0.55 Ω), charge injection (≤51 pC), off-isolation (−66 dB), and 4.3 V-tolerant control inputs compatible with 1.8 V logic.

Technical Context

The STG4210 implements two independent CMOS transmission gates controlled by separate SEL1/SEL2 inputs, each enabling bidirectional analog signal conduction between S and D terminals when high. Its C2MOS silicon gate process ensures latch-up immunity (>100 mA) and ESD robustness (2000-V HBM).

It operates across 1.65–4.3 V with rail-to-rail analog signal handling (0 to V_CC), supports fast switching (t_ON ≤ 65 ns at 3.0 V), and maintains low distortion (THD = 0.01 %) and high crosstalk rejection (−72 dB) - critical for multi-channel audio and precision data acquisition paths.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 4.3 V single supply - enables direct integration with Li-ion battery-powered systems and 1.8 V/3.3 V logic domains.
R_PEAK	1.30 Ω max at V_CC = 4.3 V, T_A = 25 °C - minimizes signal attenuation and voltage drop in low-amplitude analog paths.
t_ON/t_OFF	40 ns / 15 ns max at V_CC = 3.6–4.3 V - supports high-speed multiplexing in digital audio and serial interface signal conditioning.
OIRR	−66 dB min at f = 100 kHz - ensures strong channel-to-channel isolation in dual-input sensor front-ends or stereo audio routing.
Q (Charge Injection)	49 pC max at V_CC = 3.6–4.3 V - reduces glitch-induced error in precision ADC sample-and-hold circuits.
ESD Rating	2000 V HBM per JESD22-A114 - eliminates need for external protection diodes in handheld device I/O stages.

Pinout & Package

STG4210QTR uses a 10-pin QFN10L package (1.8 mm × 1.4 mm, 0.4 mm pitch) with exposed thermal pad (pin 11 not bonded). Pin 1 is NC; pins 2 and 7 are independent source terminals (S1/S2); pins 5 and 10 are common drain terminals (D1/D2); pins 4 and 9 are active-high selection controls (SEL2/SEL1); pin 3 is V_CC; pin 8 is GND.

Pin/Terminal	Circuit Role	Design Meaning
1, 6	No connection	Unbonded pads - must be left floating or tied to GND for mechanical stability; no electrical function.
2 (S1), 7 (S2)	Analog source terminal	Bidirectional signal input/output port for first and second switch channel; supports rail-to-rail analog swing.
3	Positive supply	Single power rail for both switches and control logic; also defines analog signal range (0 to V_CC).
4 (SEL2), 9 (SEL1)	Digital control input	Active-high logic inputs tolerant up to 4.3 V regardless of V_CC level - simplifies interfacing with mixed-voltage microcontrollers.
5 (D2), 10 (D1)	Analog common terminal	Shared path for switched signals; connects to S1/S2 when corresponding SEL is high; high-Z otherwise.
8	Ground reference	Return path for supply current and analog signal reference; must be low-inductance connection for THD performance.

Key Features

Feature	Design Value
Ultra-low quiescent current	ICC ≤ 0.2 μA at TA = 85 °C - extends battery life in always-on sensor nodes and wearable devices.
Low ON-resistance flatness	R_FLAT ≤ 0.55 Ω at V_CC = 4.3 V - preserves linearity across full analog signal range in audio DAC output stages.
High off-isolation & low crosstalk	OIRR = −66 dB, Xtalk = −72 dB - prevents signal bleed between stereo channels or differential sensor pairs.
4.3 V-tolerant control inputs	SEL pins accept 0–4.3 V logic regardless of V_CC (1.65–4.3 V) - eliminates level shifters in mixed-supply systems.
Latch-up immunity	Exceeds 100 mA per JESD78 Class II - ensures robust operation during transient overvoltage events in industrial interfaces.

Applications

Portable Audio Routing

Stereo Headphone Switching

Use Scenario: Selecting between internal DAC output and external codec input in Bluetooth earbuds.

IC Role / Device Role / Timing Role: Dual SPST analog switch routing bidirectional audio paths with minimal insertion loss and distortion.

Use Value: R_PEAK ≤ 1.30 Ω and THD = 0.01 % preserve SNR > 95 dB across 20 Hz–20 kHz band.

Use Scenario: Enabling/disabling left/right headphone drivers independently in smart headphones.

IC Role / Device Role / Timing Role: Independent channel control via SEL1/SEL2 allows mute sequencing without pop/click artifacts.

Use Value: Charge injection ≤ 51 pC and t_OFF ≤ 40 ns minimize audible transients during channel switching.

Low-Voltage Sensor Multiplexing

Wearable Biometric Signal Path

Use Scenario: Time-division multiplexing of multiple analog biosensor outputs (ECG, SpO₂, temperature) into one ADC input.

IC Role / Device Role / Timing Role: Low-R_ON analog switch with rail-to-rail capability ensures accurate DC-coupled signal transfer.

Use Value: R_FLAT ≤ 0.55 Ω and ΔR_ON ≤ 15 mΩ maintain gain matching across channels for calibrated measurements.

Use Scenario: Isolating sensitive photodiode amplifier outputs from shared analog front-end in fitness trackers.

IC Role / Device Role / Timing Role: High off-isolation (−66 dB) and low COFF (85 pF) prevent capacitive coupling between optical and motion sensing paths.

Use Value: OIRR and Xtalk specs ensure <10 µV cross-channel interference in sub-mV biopotential signals.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSM1021QTR	R_ON = 1.8 Ω max at 3.3 V; higher ICC (1 μA); no 4.3 V-tolerant SEL inputs	Requires level-shifting for 1.8 V MCU control; less suitable for battery-voltage scaling below 2.7 V	Prefer when cost sensitivity outweighs ultra-low ICC and wide V_CC range requirements
ADG821BRMZ	R_ON = 0.5 Ω max at 3 V; higher charge injection (75 pC); smaller 8-lead MSOP package	Better R_ON but higher glitch energy - may require external filtering in precision ADC sampling	Prefer when lowest possible on-resistance is critical and board space permits larger footprint

Compared with TSM1021QTR and ADG821BRMZ, STG4210QTR uniquely balances ultra-low ICC (0.2 μA), 4.3 V-tolerant control, and 1.30 Ω R_PEAK across 1.65–4.3 V - making it optimal for dynamically scaled portable systems where leakage, voltage flexibility, and signal integrity are jointly constrained.

Availability

STG4210QTR is available at Aetrix Electronics and suitable for portable audio routing, stereo headphone switching, and low-voltage sensor multiplexing requiring stable component supply despite its obsolete status - supported via legacy inventory and cross-qualified sourcing.

Supply support for STG4210QTR 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 analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STG4210 belongs to ST's low-voltage analog switch product line, engineered specifically for battery-powered portable equipment demanding rail-to-rail signal handling, nanowatt quiescent power, and robust ESD tolerance in sub-2 mm² packages.

FAQ

Is STG4210QTR still in active production?

No - STG4210QTR is marked as obsolete by STMicroelectronics per official documentation. However, Aetrix Electronics maintains verified legacy stock with full traceability and provides technical support for design-in continuity, including recommended replacements and application migration guidance.

Can STG4210QTR operate with V_CC = 1.8 V while accepting 3.3 V logic on SEL pins?

Yes - the SEL inputs are 4.3 V tolerant and specified to accept VI = 0 to V_CC + 0.5 V. At V_CC = 1.8 V, SEL pins safely accept up to 2.3 V, and with proper logic thresholds (VIH ≥ 0.65×V_CC), 3.3 V signals require an external resistor divider or level shifter to avoid overstress.

What is the thermal pad connection requirement for QFN10L package?

The QFN10L package includes an exposed thermal pad (not electrically connected to any pin) that must be soldered to a PCB copper pour tied to GND for optimal thermal dissipation and EMI suppression. ST recommends a 4×4 array of thermal vias under the pad connected to inner ground planes.

Does STG4210QTR support bidirectional analog signal flow?

Yes - each switch channel (S1↔D1 and S2↔D2) is fully bidirectional with symmetrical R_ON, capacitance, and leakage characteristics. Signal direction is determined solely by external circuit topology, not internal architecture, enabling flexible use in both source- and load-side configurations.

STG4210QTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Switch Circuit:: SPST - NO

Multiplexer/Demultiplexer Circuit:: 1:1

Number of Circuits:: 2

On-State Resistance (Max):: 1.3Ohm

Channel-to-Channel Matching (ΔRon):: 10mOhm

Voltage - Supply, Single (V+):: 1.65V ~ 4.3V

Voltage - Supply, Dual (V±):: -

Switch Time (Ton, Toff) (Max):: 55ns, 30ns

-3db Bandwidth:: 58MHz

Charge Injection:: 49pC

Channel Capacitance (CS(off), CD(off)):: 85pF

Current - Leakage (IS(off)) (Max):: 100nA

Crosstalk:: -72dB @ 100kHz

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-QFN (1.8x1.4)

STG4210QTR FAQ

1.How can I place an order for STG4210QTR through Aetrix?

Please submit a Request for Quotation (RFQ) for STG4210QTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STG4210QTR reliable?

The price and inventory of STG4210QTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STG4210QTR is usually 5 days.

3.What payment methods are accepted for STG4210QTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STG4210QTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STG4210QTR?

STG4210QTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STG4210QTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STG4210QTR?

For technical support, including STG4210QTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STG4210QTR requirements.

6.How does Aetrix verify that STG4210QTR is sourced from the original manufacturer or authorized distributors?

All STG4210QTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STG4210QTR meets industry standards.

7.What is the process for return or replacement of STG4210QTR?

All STG4210QTR units undergo pre-shipment inspection (PSI). If there is an issue with STG4210QTR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STG4210QTR part is unused and in its original packaging.

Return procedure for STG4210QTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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