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

Vishay Siliconix DG9421EDV-T1-GE3

Name: DG9421EDV-T1-GE3
Brand: Vishay Siliconix
SKU: DG9421EDV-T1-GE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DG9421EDV-T1-GE3

Manufacturer:: Vishay Siliconix

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: SOT-23-6 Thin, TSOT-23-6

Datasheet:: DG9421EDV-T1-GE3.pdf

Description:: IC SWITCH SPST-NCX1 3.2OHM 6TSOP

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Product details

Overview

DG9421EDV-T1-GE3 from Vishay Siliconix is a monolithic single-pole, single-throw (SPST) analog switch with normally closed (NC) function, fabricated in high-density BiCMOS technology. It delivers 1.7 Ω typical on-resistance at +12 V, 161 MHz bandwidth, and rail-to-rail bidirectional signal switching - ideal for precision data acquisition and audio routing in battery-powered instrumentation.

For engineers reviewing the DG9421EDV-T1-GE3 datasheet, DG9421EDV-T1-GE3 pinout, DG9421EDV-T1-GE3 application, or DG9421EDV-T1-GE3 equivalent, key selection criteria include its NC logic behavior, ±3 V to ±8 V dual-supply compatibility, low 19 pC charge injection, and TSOP-6 package footprint for space-constrained PCB layouts.

Technical Context

The DG9421EDV-T1-GE3 implements a BiCMOS-based SPST switch architecture with integrated level-shifting and body-snatcher circuitry to maintain low and flat on-resistance across the full analog input range (0–12 V single supply or ±5 V dual supply). Its control logic accepts 2.4 V–compatible inputs and tolerates overvoltage up to V+, enabling direct interfacing with 3.3 V and 5 V microcontrollers without level translation.

Signal integrity is preserved via low off-capacitance (34 pF NC/NO, 36 pF COM), high off-isolation (–58 dB at 1 MHz), and minimal crosstalk - critical for multi-channel multiplexing in medical sensors and automatic test equipment where channel-to-channel leakage must remain below ±1 nA over –40 °C to +85 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
On-resistance	1.7 Ω typical at +12 V - ensures <0.1% gain error in 12-bit data acquisition paths with 1 kΩ source impedance
Bandwidth	161 MHz - supports clean switching of video signals and fast ADC/DAC interface clocks
Charge injection	19 pC - limits voltage glitch to <2 mV on 10 nF sampling capacitors in precision SAR ADC front-ends
Off-isolation	–58 dB at 1 MHz - suppresses crosstalk between adjacent channels in 16-channel ATE multiplexers
Supply range	+3 V to +16 V single or ±3 V to ±8 V dual - enables operation from Li-ion batteries (3.0–4.2 V) or industrial ±5 V rails
Switching time	28 ns turn-on / 12 ns turn-off - allows >10 MSPS multiplexed sampling in high-speed DAQ systems
Leakage current	±1.06 nA max at full temperature range - maintains accuracy in picoampere-level sensor front-ends

Pinout & Package

Package: 6-pin TSOP (JEDEC MO-193C), 3.05 mm × 2.85 mm × 1.0 mm profile, lead-free and RoHS-compliant (GE3 suffix).

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Digital control input	Active-low logic: ≤0.8 V = ON (closed), ≥2.4 V = OFF (open); accepts overvoltage up to V+
2 NC	Normally closed analog terminal	Direct path to COM when IN = low; blocks signals up to supply rails when open
3 GND	Analog/digital ground reference	Common return for control logic and analog signal paths; must be low-impedance
4 V−	Negative supply rail	Required for dual-supply operation (±3 V to ±8 V); tied to GND for single-supply use
5 COM	Common analog terminal	Bidirectional signal port - connects to NC when switch is closed, isolated when open
6 V+	Positive supply rail	Supplies internal bias and switch driver; range +3 V to +16 V (single) or +3 V to +8 V (dual)

Key Features

Feature	Design Value
Rail-to-rail analog switching	Supports full-swing signals from V− to V+ without clipping - essential for audio line-level routing and sensor interfaces
Low and flat R_ON	1.7 Ω typical with <10% variation over 0–12 V input range - minimizes THD and insertion loss in wideband applications
Logic-compatible control	2.4 V threshold with ±1 μA input current - eliminates need for external pull-ups or level shifters with 3.3 V/5 V MCUs
High bandwidth & low capacitance	161 MHz –3 dB bandwidth with 34–36 pF off-capacitance - preserves signal integrity in video and RF sampling paths
Extended temperature operation	Specified from –40 °C to +85 °C - qualified for deployment in portable medical devices and industrial field instruments

Applications

Medical Sensor Multiplexing	Portable Data Logger Front-End
Use Scenario: Selecting among 8 thermistor or ECG electrode inputs in a handheld patient monitor. IC Role / Device Role / Timing Role: NC SPST switch isolating unused sensor paths while maintaining low thermal EMF and offset drift. Use Value: 1.7 Ω R_ON and <1 nA leakage ensure sub-0.1°C measurement accuracy and >100 dB common-mode rejection.	Use Scenario: Routing analog outputs from multiple MEMS accelerometers and pressure sensors to a shared 16-bit SAR ADC. IC Role / Device Role / Timing Role: Low-charge-injection analog switch enabling precise sampling without hold capacitor corruption. Use Value: 19 pC charge injection limits sampling error to <1 LSB at 10 nF acquisition capacitance and 12 V full-scale range.
Audio Signal Routing	Reed Relay Replacement
Use Scenario: Switching line-level stereo signals between headphone output, speaker amp, and recording input in a battery-powered mixer. IC Role / Device Role / Timing Role: Bidirectional rail-to-rail SPST switch handling ±2 V peak audio waveforms with no crossover distortion. Use Value: 161 MHz bandwidth and <0.01% THD+N preserve fidelity across 20 Hz–20 kHz spectrum; 1.7 Ω R_ON avoids volume imbalance.	Use Scenario: Replacing electromechanical reed relays in automated calibration fixtures for multimeter and DMM production test systems. IC Role / Device Role / Timing Role: Solid-state NC switch providing >1 million cycles reliability, zero bounce, and 28 ns settling vs. 10 ms relay delay. Use Value: Eliminates mechanical wear and contact oxidation; enables 35× faster test throughput and silent operation in lab environments.

Medical Sensor Multiplexing

Portable Data Logger Front-End

Use Scenario: Selecting among 8 thermistor or ECG electrode inputs in a handheld patient monitor.

IC Role / Device Role / Timing Role: NC SPST switch isolating unused sensor paths while maintaining low thermal EMF and offset drift.

Use Value: 1.7 Ω R_ON and <1 nA leakage ensure sub-0.1°C measurement accuracy and >100 dB common-mode rejection.

Use Scenario: Routing analog outputs from multiple MEMS accelerometers and pressure sensors to a shared 16-bit SAR ADC.

IC Role / Device Role / Timing Role: Low-charge-injection analog switch enabling precise sampling without hold capacitor corruption.

Use Value: 19 pC charge injection limits sampling error to <1 LSB at 10 nF acquisition capacitance and 12 V full-scale range.

Audio Signal Routing

Reed Relay Replacement

Use Scenario: Switching line-level stereo signals between headphone output, speaker amp, and recording input in a battery-powered mixer.

IC Role / Device Role / Timing Role: Bidirectional rail-to-rail SPST switch handling ±2 V peak audio waveforms with no crossover distortion.

Use Value: 161 MHz bandwidth and <0.01% THD+N preserve fidelity across 20 Hz–20 kHz spectrum; 1.7 Ω R_ON avoids volume imbalance.

Use Scenario: Replacing electromechanical reed relays in automated calibration fixtures for multimeter and DMM production test systems.

IC Role / Device Role / Timing Role: Solid-state NC switch providing >1 million cycles reliability, zero bounce, and 28 ns settling vs. 10 ms relay delay.

Use Value: Eliminates mechanical wear and contact oxidation; enables 35× faster test throughput and silent operation in lab environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX4617EUT+T	Higher 3.5 Ω R_ON, 100 ns t_ON, only +2.7 V to +12 V single-supply operation	Less suitable for low-distortion audio or high-speed DAQ; better for cost-sensitive industrial controls	Select if dual-supply operation and sub-30 ns switching are not required
ADG1419BRMZ-REEL7	Lower 0.9 Ω R_ON, but NO configuration only; requires external inverter for NC function	Preferred for ultra-low-R_ON precision instrumentation, but adds board area and BOM count	Choose when lowest possible on-resistance is critical and logic inversion is acceptable

Compared with MAX4617EUT+T and ADG1419BRMZ-REEL7, DG9421EDV-T1-GE3 uniquely combines NC functionality, 1.7 Ω R_ON, dual-supply support, and 28 ns switching in a 6-pin TSOP - offering optimal balance for portable medical and test equipment where space, power, and signal fidelity are co-constrained.

Availability

DG9421EDV-T1-GE3 is available at Aetrix Electronics and suitable for medical sensor multiplexing, portable data loggers, audio routing, and reed relay replacement requiring stable component supply and long-term industrial lifecycle support.

Supply support for DG9421EDV-T1-GE3 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

Vishay Siliconix designs and manufactures high-performance discrete semiconductors and analog ICs, with leadership in power MOSFETs, diodes, optoelectronics, and precision analog switches.

The DG9421EDV-T1-GE3 belongs to Vishay's high-speed analog switch product line, engineered specifically for low-distortion signal routing in portable instrumentation, medical diagnostics, and automated test equipment where reliability and signal integrity are non-negotiable.

FAQ

What is the logic polarity of the DG9421EDV-T1-GE3 control input?

The DG9421EDV-T1-GE3 features normally closed (NC) logic: applying ≤0.8 V to the IN pin closes the switch (connects NC to COM), while ≥2.4 V opens it. This matches standard TTL/CMOS low-active control and eliminates need for external inverters in many MCU-driven designs. The DG9421EDV-T1-GE3 datasheet confirms this behavior in the Truth Table on page 1.

Can DG9421EDV-T1-GE3 operate from a single 3.3 V supply?

Yes, DG9421EDV-T1-GE3 supports single-supply operation from +3 V to +16 V. At +3.3 V, it achieves ~7.3 Ω typical on-resistance and maintains full –40 °C to +85 °C functionality. Input logic remains compatible (2.4 V threshold), and leakage stays within ±1 nA. This makes DG9421EDV-T1-GE3 suitable for direct integration into 3.3 V IoT sensor nodes and portable diagnostics.

Does DG9421EDV-T1-GE3 require external protection diodes for overvoltage on analog pins?

No - DG9421EDV-T1-GE3 integrates clamp diodes on NC, NO, and COM pins that limit analog signals to V+ + 0.3 V and V− − 0.3 V. Per Absolute Maximum Ratings (page 2), forward diode current must be limited to 50 mA continuous. For robustness in transient-prone environments, external series resistors (e.g., 100 Ω) are recommended, but discrete clamps are unnecessary. This protection scheme is documented for DG9421EDV-T1-GE3 in the Notes section of the datasheet.

How does DG9421EDV-T1-GE3 handle bidirectional analog signals?

DG9421EDV-T1-GE3 provides true bidirectional rail-to-rail switching: analog signals pass equally well from NC to COM or COM to NC with identical on-resistance, capacitance, and leakage. This symmetry arises from its BiCMOS topology and balanced channel design - verified in the Analog Switch section (page 2) where VANALOG is specified as 0 to +12 V (single supply) or ±5 V (dual supply). DG9421EDV-T1-GE3 thus supports AC-coupled audio, differential sensor outputs, and bidirectional bus isolation.

What is the maximum signal frequency supported by DG9421EDV-T1-GE3 without significant attenuation?

DG9421EDV-T1-GE3 delivers a –3 dB bandwidth of 161 MHz under 50 Ω source/load and 5 pF parasitic capacitance conditions. In practical PCB layouts with 35 pF total load (including trace and ADC input), usable bandwidth remains >50 MHz - sufficient for HDMI auxiliary channels, ultrasound front-ends, and high-speed digital I/O isolation. This value is measured and guaranteed per the Dynamic Characteristics table (page 2) for DG9421EDV-T1-GE3.

DG9421EDV-T1-GE3 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Switch Circuit:: SPST - NC

Multiplexer/Demultiplexer Circuit:: 1:1

Number of Circuits:: 1

On-State Resistance (Max):: 3.2Ohm

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

Voltage - Supply, Single (V+):: 3V ~ 16V

Voltage - Supply, Dual (V±):: ±3V ~ 8V

Switch Time (Ton, Toff) (Max):: 36ns, 22ns

-3db Bandwidth:: 161MHz

Charge Injection:: 19pC

Channel Capacitance (CS(off), CD(off)):: 34pF, 36pF

Current - Leakage (IS(off)) (Max):: 1nA

Crosstalk:: -

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 6-TSOP

DG9421EDV-T1-GE3 FAQ

1.How can I place an order for DG9421EDV-T1-GE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for DG9421EDV-T1-GE3 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 DG9421EDV-T1-GE3 reliable?

The price and inventory of DG9421EDV-T1-GE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG9421EDV-T1-GE3 is usually 5 days.

3.What payment methods are accepted for DG9421EDV-T1-GE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG9421EDV-T1-GE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DG9421EDV-T1-GE3?

DG9421EDV-T1-GE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DG9421EDV-T1-GE3 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 DG9421EDV-T1-GE3?

For technical support, including DG9421EDV-T1-GE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG9421EDV-T1-GE3 requirements.

6.How does Aetrix verify that DG9421EDV-T1-GE3 is sourced from the original manufacturer or authorized distributors?

All DG9421EDV-T1-GE3 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 DG9421EDV-T1-GE3 meets industry standards.

7.What is the process for return or replacement of DG9421EDV-T1-GE3?

All DG9421EDV-T1-GE3 units undergo pre-shipment inspection (PSI). If there is an issue with DG9421EDV-T1-GE3, 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 DG9421EDV-T1-GE3 part is unused and in its original packaging.

Return procedure for DG9421EDV-T1-GE3:

1.Submit a request within 90 days.

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

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