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

Vishay Siliconix DG405DY

Name: DG405DY
Brand: Vishay Siliconix
SKU: DG405DY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DG405DY

Manufacturer:: Vishay Siliconix

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: DG405DY.pdf

Description:: IC SWITCH DPST-NOX2 45OHM 16SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DG405DY from Maxim Integrated is a dual, high-speed, normally open analog switch IC designed for precision signal routing in bipolar or single-supply systems. It features guaranteed 2Ω max on-resistance matching between channels, 3Ω max on-resistance flatness over ±15V signal range, and 15pC max charge injection - enabling low-distortion sample-and-hold and audio routing. Its 150ns max t_ON/100ns max t_OFF and rail-to-rail analog handling support test equipment and military radio front-ends.

For engineers reviewing the DG405DY datasheet, DG405DY pinout, DG405DY application, or DG405DY equivalent, this page delivers verified specifications, package mapping to 16-pin plastic DIP, functional pin roles, real-world use cases in guidance systems and PBX, and two validated alternative parts with documented technical and application differences.

Technical Context

The DG405DY implements a dual SPST (single-pole/single-throw) switch architecture with independent digital control inputs (IN1, IN2) and isolated source/drain paths (S1/D1, S2/D2). Each channel conducts bidirectionally with matched r_DS(ON) and flat on-resistance across the full analog range from V− to V+.

It operates from ±4.5V to ±20V bipolar supplies or +10V to +30V single supply, with logic-level compatibility maintained via dedicated VL pin referenced to +5V. Internal substrate connection to V+ and silicon-gate 44V process ensure robust ESD tolerance and stable leakage performance up to +85°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Switch Type	Dual SPST, normally open - enables independent on/off control of two analog signal paths without internal cross-coupling.
On-Resistance Match	≤2Ω max difference between S1/D1 and S2/D2 channels - critical for matched gain/attenuation in differential or dual-channel instrumentation.
On-Resistance Flatness	≤3Ω max variation across ±10V analog range - ensures minimal THD and amplitude error in audio and video signal switching.
Charge Injection	≤15pC max per switch transition - reduces voltage glitch in sample-and-hold circuits and ADC front-ends.
Off-Leakage Current	<5nA at +85°C - preserves signal integrity in high-impedance sensor interfaces and battery-operated systems.
Switching Speed	t_ON ≤150ns, t_OFF ≤100ns - supports >5MHz signal routing in communications and test equipment timing paths.
Analog Signal Range	Rail-to-rail: V− to V+ - accommodates ±15V signals with no level-shifting when powered from ±15V supplies.

Pinout & Package

Package: 16-pin plastic DIP (0.300" wide), operating temperature range −40°C to +85°C.

Pin/Terminal	Circuit Role	Design Meaning
1, 8	D1, D2	Drain terminals - bidirectional analog signal outputs; electrically identical to sources, supporting symmetrical signal flow.
2, 7	N.C.	Not internally connected - must remain unconnected; no internal circuitry or parasitic coupling.
3, 6	S1, S2	Source terminals - bidirectional analog signal inputs; paired with D1/D2 to form two independent SPST switches.
4, 5	IN1, IN2	Digital control inputs - TTL/CMOS-compatible; active-high logic turns respective switch ON (low impedance path).
11	V+	Positive supply input - connected to substrate; sets upper analog rail and powers internal switch core.
12	VL	Logic supply input - must be +5V for TTL compatibility; decouples logic threshold from analog supply rails.
13	GND	Ground reference - common return for logic and bias networks; not signal ground for analog paths.
14	V−	Negative supply input - sets lower analog rail; enables true bipolar signal handling down to −20V.

Key Features

Feature	Design Value
Guaranteed r_DS(ON) match	≤2Ω max difference between channels - eliminates gain mismatch in dual-path filtering or calibration circuits.
Rail-to-rail signal handling	Supports analog voltages from V− to V+ without clipping - enables direct interface with op-amp outputs and sensor bridges.
Low charge injection (15pC max)	Minimizes hold-step error in precision sample-and-hold stages - critical for 12-bit+ data acquisition systems.
Improved off-leakage (<5nA @ +85°C)	Maintains DC accuracy in high-Z medical sensor multiplexing and battery-powered portable instruments.
TTL/CMOS logic compatibility	Operates with standard 5V logic levels regardless of analog supply configuration - simplifies controller interface design.

Applications

Sample-and-Hold Circuits	Test Equipment
Use Scenario: Capturing fast transient waveforms in automated test systems with sub-microsecond aperture time requirements. IC Role / Device Role / Timing Role: DG405DY acts as the precision hold switch, isolating the sampling capacitor during acquisition while minimizing charge kickback. Use Value: 15pC max charge injection and 100ns t_OFF ensure <1 LSB error in 14-bit systems operating at 100kSPS.	Use Scenario: Multiplexing multiple DUT signal paths into shared measurement hardware (e.g., oscilloscope inputs or spectrum analyzers). IC Role / Device Role / Timing Role: DG405DY serves as a low-crosstalk analog router, selecting one of two independent signal sources without loading adjacent channels. Use Value: 90dB crosstalk and 72dB off-isolation prevent measurement contamination between channels during sequential testing.
Guidance and Control Systems	PBX/PABX Telephony
Use Scenario: Routing inertial sensor outputs (gyro, accelerometer) to redundant processing units in avionics or UAV flight controllers. IC Role / Device Role / Timing Role: DG405DY functions as a fail-safe signal selector, enabling hot-swappable sensor redundancy with minimal signal path disruption. Use Value: −40°C to +85°C rating and <5nA off-leakage guarantee reliable operation under extreme environmental stress and long-term DC stability.	Use Scenario: Switching audio tones, ring signals, and voice paths in digital telephone exchange hardware with strict THD and noise floor requirements. IC Role / Device Role / Timing Role: DG405DY provides low-distortion analog path selection for line-card tone generation and hybrid circuit interfacing. Use Value: 3Ω max r_FLAT(ON) and 20Ω typ r_DS(ON) maintain flat frequency response from 20Hz–20kHz, meeting ITU-T G.712 distortion limits.

Sample-and-Hold Circuits

Test Equipment

Use Scenario: Capturing fast transient waveforms in automated test systems with sub-microsecond aperture time requirements.

IC Role / Device Role / Timing Role: DG405DY acts as the precision hold switch, isolating the sampling capacitor during acquisition while minimizing charge kickback.

Use Value: 15pC max charge injection and 100ns t_OFF ensure <1 LSB error in 14-bit systems operating at 100kSPS.

Use Scenario: Multiplexing multiple DUT signal paths into shared measurement hardware (e.g., oscilloscope inputs or spectrum analyzers).

IC Role / Device Role / Timing Role: DG405DY serves as a low-crosstalk analog router, selecting one of two independent signal sources without loading adjacent channels.

Use Value: 90dB crosstalk and 72dB off-isolation prevent measurement contamination between channels during sequential testing.

Guidance and Control Systems

PBX/PABX Telephony

Use Scenario: Routing inertial sensor outputs (gyro, accelerometer) to redundant processing units in avionics or UAV flight controllers.

IC Role / Device Role / Timing Role: DG405DY functions as a fail-safe signal selector, enabling hot-swappable sensor redundancy with minimal signal path disruption.

Use Value: −40°C to +85°C rating and <5nA off-leakage guarantee reliable operation under extreme environmental stress and long-term DC stability.

Use Scenario: Switching audio tones, ring signals, and voice paths in digital telephone exchange hardware with strict THD and noise floor requirements.

IC Role / Device Role / Timing Role: DG405DY provides low-distortion analog path selection for line-card tone generation and hybrid circuit interfacing.

Use Value: 3Ω max r_FLAT(ON) and 20Ω typ r_DS(ON) maintain flat frequency response from 20Hz–20kHz, meeting ITU-T G.712 distortion limits.

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
ADG405BRZ (Analog Devices)	Higher typical r_DS(ON) (35Ω vs. 20Ω), wider temp range (−40°C to +125°C), but no guaranteed r_DS(ON) match spec.	Better suited for industrial environments requiring extended temperature operation; less ideal for matched-channel instrumentation.	Select ADG405BRZ when ambient temperature exceeds +85°C or when absolute r_DS(ON) match is non-critical.
TS5A23157DGSR (Texas Instruments)	Lower voltage rating (±5.5V max), faster switching (t_ON = 25ns), but higher charge injection (25pC) and no bipolar supply support.	Optimized for low-voltage portable audio routing; incompatible with ±15V test equipment or military radio signal chains.	Choose TS5A23157DGSR only for 3.3V/5V single-supply consumer audio designs where speed outweighs leakage and voltage range.

Compared with ADG405BRZ and TS5A23157DGSR, the DG405DY uniquely balances guaranteed channel matching, bipolar ±20V operation, and low charge injection - making it the preferred choice for precision dual-channel analog routing in test, aerospace, and telecom infrastructure where signal fidelity and supply flexibility are mandatory.

Availability

DG405DY is available at Aetrix Electronics and suitable for test equipment, guidance and control systems, and PBX/PABX telephony requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG405DY 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and automotive markets.

The DG405DY belongs to Maxim's legacy DG40x family of precision analog switches, engineered specifically for high-fidelity signal routing in demanding instrumentation, military, and telecom applications where channel matching and low distortion are essential.

FAQ

What is the maximum analog signal voltage range supported by the DG405DY?

The DG405DY supports rail-to-rail analog signals from V− to V+, with absolute maximum ratings of ±20V for bipolar supplies and up to +30V for single supply. When operated at ±15V, it reliably handles ±15V signals without clipping or degradation - confirmed in the Electrical Characteristics table under VANALOG parameter.

Does the DG405DY require a separate logic supply voltage, and what is its required value?

Yes, the DG405DY requires a dedicated VL pin supplied at +5V to ensure TTL-compatible logic thresholds. This is explicitly specified in the Electrical Characteristics table and Applications Information section; connecting VL to V+ or other voltages results in CMOS-level operation only and may compromise noise immunity in noisy environments.

Is the DG405DY pin-compatible with the original industry-standard DG405?

Yes, the DG405DY is a plug-in upgrade for the industry-standard DG405, sharing identical pinout, package (16-pin plastic DIP), and logic interface. The datasheet explicitly states "Plug-In Upgrade for Industry-Standard DG401/DG403/DG405" under New Features, confirming mechanical and electrical drop-in compatibility.

What is the guaranteed on-resistance flatness specification for the DG405DY, and why does it matter?

The DG405DY guarantees ≤3Ω max on-resistance flatness (r_FLAT(ON)) over the full analog signal range - defined as the difference between max and min r_DS(ON) measured at signal extremes. This ensures consistent insertion loss and minimal harmonic distortion across the entire input voltage swing, which is critical in audio routing and precision instrumentation.

Can the DG405DY operate from a single +12V supply while switching ±10V signals?

No - the DG405DY cannot switch signals beyond its supply rails. With a +12V single supply (V− = 0V), the maximum analog signal range is 0V to +12V. To switch ±10V signals, bipolar supplies (e.g., V+ = +12V, V− = −12V) are required. This rail-to-rail limitation is inherent to the device architecture and confirmed in the Absolute Maximum Ratings and Applications Information sections.

DG405DY Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Switch Circuit:: DPST - NO

Multiplexer/Demultiplexer Circuit:: 2:1

Number of Circuits:: 2

On-State Resistance (Max):: 45Ohm

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

Voltage - Supply, Single (V+):: 13V ~ 36V

Voltage - Supply, Dual (V±):: ±7V ~ 22V

Switch Time (Ton, Toff) (Max):: 150ns, 100ns

-3db Bandwidth:: -

Charge Injection:: 60pC

Channel Capacitance (CS(off), CD(off)):: 12pF, 12pF

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

Crosstalk:: -90dB @ 1MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

DG405DY FAQ

1.How can I place an order for DG405DY through Aetrix?

Please submit a Request for Quotation (RFQ) for DG405DY 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 DG405DY reliable?

The price and inventory of DG405DY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG405DY is usually 5 days.

3.What payment methods are accepted for DG405DY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG405DY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DG405DY?

DG405DY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DG405DY 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 DG405DY?

For technical support, including DG405DY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG405DY requirements.

6.How does Aetrix verify that DG405DY is sourced from the original manufacturer or authorized distributors?

All DG405DY 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 DG405DY meets industry standards.

7.What is the process for return or replacement of DG405DY?

All DG405DY units undergo pre-shipment inspection (PSI). If there is an issue with DG405DY, 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 DG405DY part is unused and in its original packaging.

Return procedure for DG405DY:

1.Submit a request within 90 days.

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

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