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Vishay Siliconix DG409LDY-T1-E3
- Part No.:
- DG409LDY-T1-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG409LDY-T1-E3.pdf
- Description:
- IC SWITCH SP4T X 2 29OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,667
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Product details
Overview
DG409LDY-T1-E3 from Vishay Siliconix is a dual 4-channel differential analog multiplexer IC designed for precision signal routing in low-voltage systems. It features 2-bit address control (A0, A1), break-before-make switching, ±3 V to ±6 V dual supply or 3 V to 12 V single supply operation, and 17 Ω typical on-resistance - enabling high-fidelity audio/video and data acquisition channel selection.
For engineers reviewing the DG409LDY-T1-E3 datasheet, DG409LDY-T1-E3 pinout, DG409LDY-T1-E3 application, or DG409LDY-T1-E3 equivalent, key selection criteria include guaranteed break-before-make timing, sub-1 nA off-leakage at 85 °C, 38 ns enable turn-on time under 12 V supply, and SOIC-16 package compatibility with legacy DG409 footprints.
Technical Context
The DG409LDY-T1-E3 implements a BiCMOS process architecture to achieve low RDS(on) and fast switching while maintaining TTL/CMOS/LV logic compatibility. Its dual 4:1 differential topology routes one of four differential input pairs (S1a/S1b through S4a/S4b) to common differential outputs (Da/Db), with independent enable (EN) and address decoding.
Break-before-make is guaranteed across all channel transitions, preventing momentary crosstalk. Digital inputs operate at logic thresholds of 0.6 V (low) and 2.4 V (high) under 5 V supply, and the device supports rail-to-rail analog signal ranges - 0 to 5 V (single 5 V), –5 to +5 V (dual ±5 V), or 0 to 3 V (single 3 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 3 V to 12 V single supply or ±3 V to ±6 V dual supply - supports battery-powered and mixed-rail industrial designs without level-shifting. |
| RDS(on) | 17 Ω typ. at V+ = 12 V - ensures minimal signal attenuation and distortion in precision instrumentation paths. |
| tON(EN) | 38 ns typ. at V+ = 12 V - enables high-speed multiplexing in real-time data acquisition and communication systems. |
| IS(OFF) | 0.2 nA max. at TA = 85 °C - critical for low-drift sample-and-hold and high-impedance sensor front-ends. |
| Charge Injection | 1 pC typ. - minimizes voltage glitch during switching, preserving accuracy in ADC driver and DAC output stages. |
| Off-Isolation | 82 dB at 1 MHz - suppresses inter-channel interference in multi-signal routing applications like DSLAM and test equipment. |
| ESD Protection | 2000 V HBM - enhances robustness during board assembly and field handling without external protection. |
Pinout & Package
Package: 16-pin SOIC (narrow, JEDEC MS-012), body dimensions 9.9 mm × 3.9 mm × 1.5 mm, lead pitch 1.27 mm, RoHS-compliant matte tin lead finish (E3 suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S1a | First differential source input pair terminal (positive side) - connects to selected analog input channel 1. |
| 2 | S1b | First differential source input pair terminal (negative side) - completes differential path for channel 1. |
| 3 | S2a | Second differential source input pair terminal (positive side) - used for channel 2 routing. |
| 4 | S2b | Second differential source input pair terminal (negative side) - complements S2a for balanced signal integrity. |
| 5 | S3a | Third differential source input pair terminal (positive side) - supports channel 3 selection in 4-channel set. |
| 6 | S3b | Third differential source input pair terminal (negative side) - maintains common-mode rejection for channel 3. |
| 7 | S4a | Fourth differential source input pair terminal (positive side) - final channel input for full 4:1 differential mux function. |
| 8 | S4b | Fourth differential source input pair terminal (negative side) - ensures symmetrical routing to Da/Db outputs. |
| 9 | GND | Analog/digital ground reference - shared return for all analog and digital circuitry; requires low-impedance PCB connection. |
| 10 | V− | Negative supply rail - required for dual-supply operation; must be ≤ V+ − 14 V per absolute maximum rating. |
| 11 | V+ | Positive supply rail - powers internal logic and analog switches; supports 3–12 V single or ±3–±6 V dual configurations. |
| 12 | EN | Active-high enable input - disables all channels when low; TTL/CMOS compatible with 0.6 V / 2.4 V thresholds at 5 V supply. |
| 13 | A0 | LSB address input - selects channel pair (00, 01, 10, 11) along with A1; accepts 3 V logic levels. |
| 14 | A1 | MSB address input - works with A0 to decode one of four differential channels; no internal pull-up/down. |
| 15 | Da | Differential output (positive) - delivers selected channel's positive signal; routed directly from enabled Sxa pin. |
| 16 | Db | Differential output (negative) - delivers selected channel's negative signal; routed directly from enabled Sxb pin. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-for-pin compatibility with DG409 | Direct drop-in replacement for legacy DG409 designs - no PCB layout change required for performance upgrade. |
| Break-before-make switching | Guaranteed channel isolation during address transitions - eliminates transient short-circuits in sensitive analog paths. |
| Low charge injection (1 pC) | Reduces sampling error in switched-capacitor circuits and preserves DC accuracy in precision measurement front-ends. |
| 82 dB off-isolation at 1 MHz | Enables clean multi-channel signal separation in high-density routing applications such as portable test equipment. |
| TTL/CMOS/LV logic compatibility | Operates with 3 V logic families without interface buffers - simplifies integration with microcontrollers and FPGAs. |
| 2000 V HBM ESD rating | Meets industrial handling requirements - reduces need for external ESD protection components in end-equipment design. |
Applications
| Audio Signal Routing | Portable Data Acquisition |
|---|---|
|
Use Scenario: Switching between multiple microphone or line-level inputs in a professional audio mixer or USB audio interface. IC Role / Device Role / Timing Role: Dual differential 4:1 analog multiplexer selecting balanced input sources with simultaneous positive/negative path control. Use Value: Maintains common-mode rejection and signal integrity via matched Sxa/Sxb pairs, while 17 Ω RDS(on) minimizes insertion loss across 20 Hz–20 kHz bandwidth. |
Use Scenario: Scanning 4 differential sensor outputs (e.g., thermocouples, strain gauges) into a single sigma-delta ADC in handheld test gear. IC Role / Device Role / Timing Role: Precision analog switch providing rail-to-rail signal pass-through and guaranteed break-before-make to prevent ADC input overload. Use Value: 0.2 nA max. off-leakage at 85 °C ensures <1 µV offset drift over temperature, critical for 16-bit+ measurement resolution. |
| DSLAM Line Card Interface | Battery-Powered Medical Monitor |
|
Use Scenario: Routing subscriber line signals in digital subscriber line access multiplexers requiring high channel density and low crosstalk. IC Role / Device Role / Timing Role: High-isolation differential multiplexer managing upstream/downstream analog paths with 82 dB off-isolation at 1 MHz. Use Value: 82 dB crosstalk suppression prevents interference between adjacent ADSL/VDSL lines, meeting ITU-T G.992.x spectral mask requirements. |
Use Scenario: Multiplexing ECG, SpO₂, and respiration sensor channels in a wearable patient monitor powered by a 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Ultra-low-power analog switch operating from 3 V single supply with 0.7 µA max. supply current. Use Value: 3 V operation and 0.7 µA I+ enable >500-hour battery life in continuous monitoring mode while preserving signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-channel differential analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4674ESE+ | Higher RDS(on) (45 Ω typ.), slower tON (75 ns), but offers fault protection and higher supply voltage range (up to ±20 V). | Preferred in industrial PLC I/O modules where overvoltage transients exceed ±6 V. | Select MAX4674ESE+ only if ±20 V fault tolerance is required; otherwise DG409LDY-T1-E3 provides superior speed and on-resistance. |
| ADG409BRZ | Similar RDS(on) (20 Ω typ.) and pinout, but lacks guaranteed break-before-make and has higher leakage (10 nA max. at 85 °C). | Suitable for cost-sensitive consumer audio where minor crosstalk is acceptable. | Choose ADG409BRZ for lower BOM cost in non-critical applications; DG409LDY-T1-E3 is preferred for medical or test equipment demanding guaranteed BBM and sub-nA leakage. |
Compared with MAX4674ESE+ and ADG409BRZ, DG409LDY-T1-E3 delivers the lowest combination of on-resistance, switching time, and off-leakage in a standard SOIC-16 package - making it optimal for high-accuracy, high-speed differential signal routing where reliability and precision are prioritized over extended voltage range or cost reduction.
Availability
DG409LDY-T1-E3 is available at Aetrix Electronics and suitable for data acquisition systems, portable test equipment, and audio/video signal routing requiring stable component supply and long-term manufacturing continuity.
Supply support for DG409LDY-T1-E3 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-performance analog switches, MOSFETs, and precision resistive solutions.
The DG409LDY-T1-E3 belongs to Vishay's precision analog multiplexer product line, engineered for low-voltage, low-distortion signal routing in battery-operated and high-fidelity measurement systems.
FAQ
What supply voltages does the DG409LDY-T1-E3 support?
The DG409LDY-T1-E3 supports single-supply operation from 3 V to 12 V and dual-supply operation from ±3 V to ±6 V. At 12 V single supply, it achieves 17 Ω typical on-resistance and 38 ns enable turn-on time. The device maintains rail-to-rail analog signal range - 0 to V+ for single supply, and ±|V−| to ±|V+| for dual supply - ensuring compatibility with diverse system power architectures without external level-shifting circuitry.
Does DG409LDY-T1-E3 guarantee break-before-make switching?
Yes, DG409LDY-T1-E3 guarantees break-before-make switching across all channel transitions, as explicitly stated in the Vishay datasheet (S16-0276-Rev. J). This prevents momentary short-circuits between adjacent differential input pairs during address changes - a critical feature for protecting downstream amplifiers and ADCs in precision measurement systems.
What is the maximum operating temperature for DG409LDY-T1-E3?
The DG409LDY-T1-E3 is rated for operation from –40 °C to +85 °C (D temperature suffix), as confirmed in the Ordering Information table of the Vishay datasheet. At 85 °C, its maximum off-leakage current remains 10 nA, and on-resistance increases to 35 Ω - both values validated across the full industrial temperature range.
Is DG409LDY-T1-E3 pin-compatible with the original DG409?
Yes, DG409LDY-T1-E3 is pin-for-pin compatible with the industry-standard DG409, as stated in the Vishay datasheet introduction. It uses the same 16-pin SOIC package (MS-012), identical pinout, and matching footprint - enabling direct replacement in existing designs to improve on-resistance, switching speed, and leakage performance without PCB revision.
What logic families can drive the address and enable inputs of DG409LDY-T1-E3?
DG409LDY-T1-E3 accepts TTL, CMOS, and LV logic inputs. Under 5 V supply, its logic high threshold is 2.4 V min. and logic low threshold is 0.6 V max., supporting direct interfacing with 3 V microcontrollers, FPGAs, and ASICs without level translators. Input current remains below ±1.5 µA across temperature, minimizing loading on driving circuitry.
DG409LDY-T1-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 29Ohm
- Channel-to-Channel Matching (ΔRon):
- 1Ohm
- Voltage - Supply, Single (V+):
- 2V ~ 12V
- Voltage - Supply, Dual (V±):
- ±3V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 55ns, 25ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 7pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -82dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG409LDY-T1-E3 FAQ
1.How can I place an order for DG409LDY-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG409LDY-T1-E3 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 DG409LDY-T1-E3 reliable?
The price and inventory of DG409LDY-T1-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG409LDY-T1-E3 is usually 5 days.
3.What payment methods are accepted for DG409LDY-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG409LDY-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG409LDY-T1-E3?
DG409LDY-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG409LDY-T1-E3 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 DG409LDY-T1-E3?
For technical support, including DG409LDY-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG409LDY-T1-E3 requirements.
6.How does Aetrix verify that DG409LDY-T1-E3 is sourced from the original manufacturer or authorized distributors?
All DG409LDY-T1-E3 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 DG409LDY-T1-E3 meets industry standards.
7.What is the process for return or replacement of DG409LDY-T1-E3?
All DG409LDY-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with DG409LDY-T1-E3, 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 DG409LDY-T1-E3 part is unused and in its original packaging.
Return procedure for DG409LDY-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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