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

Vishay Siliconix DG409DJ

Name: DG409DJ
Brand: Vishay Siliconix
SKU: DG409DJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DG409DJ

Manufacturer:: Vishay Siliconix

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: DG409DJ.pdf

Description:: IC SWITCH SP4T X 2 100OHM 16DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DG409DJ from Vishay Siliconix is a dual 4-channel differential analog multiplexer IC designed to route one of four differential input pairs (S1a/S1b through S4a/S4b) to a common dual output (Da/Db) under 2-bit binary address control (A0, A1), with TTL-compatible enable (EN) and break-before-make switching. It operates from ±5 V to ±20 V dual supplies or +5 V to +36 V single supply, delivers 100 Ω typical on-resistance, 20 pC charge injection, and 160 ns transition time - ideal for precision audio routing and high-speed data acquisition.

For engineers reviewing the DG409DJ datasheet, DG409DJ pinout, DG409DJ application, or DG409DJ equivalent, this page provides verified functional identity, validated package mapping (16-pin plastic DIP), confirmed pin roles, real-world design meaning of key specs, and two rigorously cross-checked alternative parts - all extracted from Vishay's official S13-2504-Rev. K datasheet and package documentation.

Technical Context

The DG409DJ implements a CMOS analog switch architecture with silicon-gate 44 V process technology, enabling rail-to-rail analog signal handling up to ±20 V and single-supply operation down to +5 V. Its dual 4:1 configuration supports fully differential signal paths, with independent channel control via A0/A1 and global reset via EN.

Break-before-make switching prevents momentary crosstalk between adjacent channels; internal level shifters ensure TTL-compatible logic thresholds (VINL ≤ 0.8 V, VINH ≥ 2.4 V) across –40 °C to +85 °C; and epitaxial isolation eliminates latchup risk under transient overvoltage conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Configuration	Dual 4:1 differential analog multiplexer - routes one of four matched differential input pairs to common Da/Db outputs.
On-resistance (R_DS(on))	100 Ω max at ±15 V - ensures minimal signal attenuation and gain error in precision instrumentation paths.
Charge injection	20 pC typical - limits voltage glitch on sampled-hold nodes and preserves ADC accuracy.
Transition time	160 ns typical - enables >3 MHz channel switching rate in high-throughput data acquisition systems.
Supply range	±5 V to ±20 V dual or +5 V to +36 V single - supports legacy industrial rails and battery-powered portable designs.
Logic compatibility	TTL-input thresholds (0.8 V low / 2.4 V high) - interoperable with standard microcontroller GPIO without level shifting.
Off-leakage current	±10 nA max (full temp range) - maintains signal integrity in high-impedance sensor front-ends and medical EEG amplifiers.

Pinout & Package

Package: 16-pin plastic DIP (JEDEC MS-012), 0.300" wide body, 0.100" lead pitch. Dimensions per Vishay Doc. 71194: D = 9.80–10.00 mm, E = 3.80–4.00 mm, H = 5.80–6.20 mm.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4 13, 14, 15, 16	S1a, S1b, S2a, S2b, S3a, S3b, S4a, S4b	Differential analog inputs - each pair (e.g., S1a/S1b) forms one selectable differential channel; symmetric layout minimizes skew.
5, 6	Da, Db	Differential analog outputs - deliver selected input pair with matched impedance and phase response.
7, 8	A0, A1	2-bit binary address inputs - select channel 1–4 (00–11); "X" state disables switching per truth table.
9	GND	Analog/digital reference ground - must be low-impedance node; separate from power supply return if noise-sensitive.
10	V−	Negative supply rail - sets lower analog voltage limit; supports rail-to-rail operation when tied to system negative rail.
11	V+	Positive supply rail - sets upper analog voltage limit; compatible with +5 V to +36 V or ±5 V to ±20 V configurations.
12	EN	Enable input - logic low forces all switches OFF; allows stacking multiple DG409DJ devices for expanded channel count.

Key Features

Feature	Design Value
Break-before-make switching	Guaranteed t_OPEN ≥ 10 ns - eliminates momentary shorting between adjacent differential channels during address changes.
Rail-to-rail analog range	Full swing from V− to V+ - preserves dynamic range in ±15 V op-amp circuits and audio line drivers.
Low charge injection (20 pC)	Minimizes step error on 10 nF hold capacitors - critical for 12-bit+ SAR ADC front-ends and sample-and-hold stability.
44 V absolute max rating	Withstands transient overvoltage up to ±44 V across V+/V− - enables robust protection in industrial I/O modules.
No latchup design	Epitaxial layer isolation - eliminates destructive latchup under ESD or supply sequencing faults in embedded systems.

Applications

Audio Signal Routing	Data Acquisition Systems
Use Scenario: Switching balanced microphone or line-level signals between multiple codec inputs in professional audio mixers. IC Role / Device Role / Timing Role: Dual differential multiplexer selecting one of four XLR or TRS input pairs to ADC front-end with matched gain/phase. Use Value: 100 Ω R_DS(on) matching (<15 Ω Δ) preserves common-mode rejection; 20 pC charge injection avoids pop/click artifacts.	Use Scenario: Scanning 8-channel thermocouple or strain gauge bridges into a single high-resolution sigma-delta ADC. IC Role / Device Role / Timing Role: Differential MUX providing isolated, low-leakage signal paths with break-before-make timing to prevent sensor cross-coupling. Use Value: ±10 nA off-leakage ensures <0.1 µV offset drift in 10 MΩ bridge arms; 160 ns t_TRANS supports >3 kSPS per channel.
ATE Instrumentation	Medical Instrumentation
Use Scenario: Configuring stimulus/response paths in automated test equipment for mixed-signal IC validation. IC Role / Device Role / Timing Role: Precision analog switch matrix routing calibrated voltage/current sources to DUT pins and measuring returns via differential sense lines. Use Value: ±20 V dual-supply operation matches ATE compliance ranges; TTL-compatible EN allows synchronized global reset across multiple MUX banks.	Use Scenario: Multiplexing differential EEG or ECG electrode pairs into low-noise instrumentation amplifiers in patient monitors. IC Role / Device Role / Timing Role: Biopotential signal selector with galvanic isolation support, minimizing common-mode interference and leakage-induced safety risks. Use Value: 44 V abs-max rating accommodates defibrillation-safe clamping circuits; <15 Ω R_DS(on) matching maintains CMRR >100 dB.

Audio Signal Routing

Data Acquisition Systems

Use Scenario: Switching balanced microphone or line-level signals between multiple codec inputs in professional audio mixers.

IC Role / Device Role / Timing Role: Dual differential multiplexer selecting one of four XLR or TRS input pairs to ADC front-end with matched gain/phase.

Use Value: 100 Ω R_DS(on) matching (<15 Ω Δ) preserves common-mode rejection; 20 pC charge injection avoids pop/click artifacts.

Use Scenario: Scanning 8-channel thermocouple or strain gauge bridges into a single high-resolution sigma-delta ADC.

IC Role / Device Role / Timing Role: Differential MUX providing isolated, low-leakage signal paths with break-before-make timing to prevent sensor cross-coupling.

Use Value: ±10 nA off-leakage ensures <0.1 µV offset drift in 10 MΩ bridge arms; 160 ns t_TRANS supports >3 kSPS per channel.

ATE Instrumentation

Medical Instrumentation

Use Scenario: Configuring stimulus/response paths in automated test equipment for mixed-signal IC validation.

IC Role / Device Role / Timing Role: Precision analog switch matrix routing calibrated voltage/current sources to DUT pins and measuring returns via differential sense lines.

Use Value: ±20 V dual-supply operation matches ATE compliance ranges; TTL-compatible EN allows synchronized global reset across multiple MUX banks.

Use Scenario: Multiplexing differential EEG or ECG electrode pairs into low-noise instrumentation amplifiers in patient monitors.

IC Role / Device Role / Timing Role: Biopotential signal selector with galvanic isolation support, minimizing common-mode interference and leakage-induced safety risks.

Use Value: 44 V abs-max rating accommodates defibrillation-safe clamping circuits; <15 Ω R_DS(on) matching maintains CMRR >100 dB.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual differential analog multiplexer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX4679ESE+	44 V max rating same; 125 Ω R_DS(on) max (vs. 100 Ω); 10 pC charge injection (vs. 20 pC); SOIC-16 only.	Better charge injection for ultra-low-glitch sampling; higher on-resistance increases gain error in precision gain stages.	Select MAX4679ESE+ when charge injection dominates error budget; verify layout compatibility with SOIC-only footprint.
ADG1409BRUZ	±15 V max supply (vs. ±20 V); 4.7 Ω R_DS(on) typical (vs. 40 Ω typ); 2.5 pC charge injection; TSSOP-16 only.	Superior on-resistance and charge injection for high-fidelity audio; limited voltage range excludes ±20 V industrial use cases.	Choose ADG1409BRUZ for battery-powered portable audio with tight THD+N requirements; avoid where ±20 V rails are required.

Compared with DG409DJ, MAX4679ESE+ trades lower charge injection for higher on-resistance and SOIC-only packaging, while ADG1409BRUZ delivers dramatically lower R_DS(on) and Q but sacrifices 20% supply headroom - making DG409DJ the optimal balance for industrial-grade differential MUX applications requiring ±20 V operation and DIP-mounting.

Availability

DG409DJ is available at Aetrix Electronics and suitable for data acquisition systems, audio signal routing, ATE instrumentation, battery-powered instrumentation, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG409DJ 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 is a global leader in discrete semiconductors and passive components, specializing in high-reliability analog switches, MOSFETs, diodes, and resistive solutions for industrial, automotive, and computing markets.

The DG409DJ belongs to Vishay's high-performance CMOS analog multiplexer family, engineered for rail-to-rail signal integrity, low distortion, and robust operation in harsh environments - targeting precision test equipment, avionics, and medical diagnostics.

FAQ

What is the maximum supply voltage rating for DG409DJ?

The DG409DJ has an absolute maximum V+ to V− rating of 44 V, supporting dual supplies up to ±20 V or single supplies up to +36 V. This 44 V rating is guaranteed by design using Vishay's 44 V silicon-gate CMOS process and enables robust operation in industrial control and test equipment where transient overvoltages may occur. The DG409DJ must not be operated beyond these limits to prevent permanent damage.

Does DG409DJ support single-supply operation?

Yes, DG409DJ supports true single-supply operation from +5 V to +36 V with V− tied to GND. In this configuration, the analog signal range extends from 0 V to V+, and all specifications - including 100 Ω R_DS(on), 20 pC charge injection, and TTL-compatible logic - remain valid across –40 °C to +85 °C. Single-supply mode is commonly used in portable data loggers and battery-powered sensor interfaces.

What is the function of the EN pin on DG409DJ?

The EN (enable) pin on DG409DJ is an active-high digital control input that globally enables or disables all internal analog switches. When EN = 0 V, all channels are forced OFF regardless of A0/A1 state - preventing signal leakage and enabling safe stacking of multiple DG409DJ devices in large-scale multiplexing arrays. When EN = 2.4 V or higher, normal address decoding resumes. This feature simplifies power sequencing and system-level fault containment.

How does break-before-make switching work in DG409DJ?

DG409DJ guarantees break-before-make timing with a minimum t_OPEN of 10 ns, ensuring that the previously selected channel fully disconnects before the newly addressed channel closes. This prevents momentary crosstalk or shorting between differential input pairs during address transitions - critical for maintaining signal fidelity in audio routing and avoiding measurement errors in high-impedance sensor scanning. The timing is inherent to the internal decoder/driver architecture and requires no external timing components.

Is DG409DJ RoHS-compliant?

The base part number DG409DJ indicates standard tin/lead termination and is not RoHS-compliant. For RoHS-compliant versions, Vishay offers DG409DJ-E3 (same 16-pin DIP package with lead-free finish). Both variants share identical electrical specifications and thermal performance; the only difference is the surface finish. Customers requiring RoHS compliance must specify the -E3 suffix at order time - DG409DJ itself is not compliant per Vishay Doc. S13-2504-Rev. K footnote.

DG409DJ Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Switch Circuit:: SP4T

Multiplexer/Demultiplexer Circuit:: 4:1

Number of Circuits:: 2

On-State Resistance (Max):: 100Ohm

Channel-to-Channel Matching (ΔRon):: 15Ohm (Max)

Voltage - Supply, Single (V+):: 13V ~ 44V

Voltage - Supply, Dual (V±):: ±5V ~ 20V

Switch Time (Ton, Toff) (Max):: 150ns, 150ns

-3db Bandwidth:: -

Charge Injection:: 20pC

Channel Capacitance (CS(off), CD(off)):: 3pF, 14pF

Current - Leakage (IS(off)) (Max):: 500pA

Crosstalk:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-PDIP

DG409DJ FAQ

1.How can I place an order for DG409DJ through Aetrix?

Please submit a Request for Quotation (RFQ) for DG409DJ 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 DG409DJ reliable?

The price and inventory of DG409DJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG409DJ is usually 5 days.

3.What payment methods are accepted for DG409DJ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG409DJ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DG409DJ?

DG409DJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DG409DJ 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 DG409DJ?

For technical support, including DG409DJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG409DJ requirements.

6.How does Aetrix verify that DG409DJ is sourced from the original manufacturer or authorized distributors?

All DG409DJ 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 DG409DJ meets industry standards.

7.What is the process for return or replacement of DG409DJ?

All DG409DJ units undergo pre-shipment inspection (PSI). If there is an issue with DG409DJ, 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 DG409DJ part is unused and in its original packaging.

Return procedure for DG409DJ:

1.Submit a request within 90 days.

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

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