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Vishay Siliconix DG409LDY
- Part No.:
- DG409LDY
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG409LDY.pdf
- Description:
- IC SWITCH SP4T X 2 29OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,282
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Product details
Overview
DG409LDY 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, 17 Ω typical on-resistance at 12 V single supply, 38 ns enable turn-on time, and operates from 2.7 V to 12 V single or ±3 V to ±6 V dual supplies. It is used in portable test equipment and battery-powered data acquisition systems.
For engineers reviewing the DG409LDY datasheet, DG409LDY pinout, DG409LDY application, or DG409LDY equivalent, key selection considerations include its guaranteed break-before-make timing, low 0.2 nA max off-leakage, 1 pC charge injection, 82 dB crosstalk rejection at 1 MHz, and SOIC-16 package compatibility with legacy DG409 footprints.
Technical Context
The DG409LDY implements a BiCMOS process architecture enabling rail-to-rail analog signal handling across wide supply ranges. Its dual 4-channel topology supports differential input selection via independent A0/A1 decoding, with common dual outputs (Da/Db) and shared enable (EN) control.
Break-before-make timing is guaranteed by internal logic design-not just typical behavior-ensuring no momentary channel overlap during address transitions. All digital inputs are TTL/CMOS/LV logic compatible down to 3 V, with defined VIH/VIL thresholds (2.4 V / 0.6 V at 5 V supply) and sub-1.5 μA input current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Function | Dual 4-channel differential analog multiplexer with independent channel selection |
| Supply Range | 2.7–12 V single supply or ±3 V to ±6 V dual supply - enables operation in both battery-powered and split-rail systems |
| RDS(on) | 17 Ω typ. at V+ = 12 V - ensures minimal signal attenuation and voltage drop in precision routing paths |
| tON(EN) | 38 ns typ. at V+ = 12 V - supports high-speed multiplexing in real-time data acquisition |
| Charge Injection | 1 pC typ. - reduces sampling error in precision sample-and-hold circuits |
| Off-Isolation | 82 dB at 1 MHz - suppresses crosstalk between active and inactive differential channels |
| Leakage Current | 0.2 nA max. at full temperature range - preserves accuracy in high-impedance sensor interfaces |
Pinout & Package
Package: 16-pin narrow-body SOIC (JEDEC MS-012), 10.0 mm × 4.0 mm × 1.75 mm body height, surface-mount, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 13, 14, 15, 16 | S1a–S4a / S1b–S4b | Differential source inputs - each pair (e.g., S1a/S1b) forms one selectable differential channel |
| 5, 6 | Da, Db | Differential outputs - common destination for selected channel's differential signal |
| 7 | EN | Active-high enable - disables all switches when low; required for break-before-make sequencing |
| 8 | GND | Analog/digital ground reference - must be low-impedance return for signal integrity |
| 9, 10 | V−, V+ | Negative and positive supply rails - define analog signal range (e.g., −5 V to +5 V or 0 V to +12 V) |
| 11, 12 | A0, A1 | 2-bit binary address inputs - select one of four differential channels (00–11); CMOS/TTL compatible |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make guarantee | Hardware-enforced channel isolation prevents transient shorting during address changes - critical for fault-tolerant signal routing |
| Low on-resistance flatness | 3 Ω max. variation across analog range - maintains consistent gain and linearity across all channels |
| ESD robustness | 2000 V HBM - protects against handling damage in manufacturing and field deployment |
| Logic-level flexibility | Supports 3 V LV logic inputs while operating from 12 V supply - eliminates level-shifter requirement in mixed-voltage systems |
| Low charge injection | 1 pC typical - minimizes voltage glitch on hold capacitors in precision ADC front-ends |
Applications
| Portable Test Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and signal analyzers requiring fast, low-distortion switching between multiple sensor inputs. IC Role / Device Role / Timing Role: Dual differential mux routes calibrated reference and unknown signals to a single ADC input pair with matched path delay. Use Value: 82 dB crosstalk rejection and 1 pC charge injection preserve measurement resolution and reduce calibration drift. | Use Scenario: Industrial PLC modules digitizing 4–20 mA sensor loops and thermocouple inputs in compact enclosures. IC Role / Device Role / Timing Role: Selects differential sensor pairs onto shared instrumentation amplifier inputs while rejecting common-mode noise. Use Value: ±3 V to ±6 V dual-supply operation enables direct interface with bipolar sensor outputs without external level shifting. |
| Battery-Powered Medical Devices | Audio Signal Routing |
Use Scenario: Portable ECG monitors acquiring low-amplitude biopotential signals from multiple electrode configurations. IC Role / Device Role / Timing Role: Multiplexes differential electrode pairs to a low-noise analog front-end, minimizing added thermal and switching noise. Use Value: 0.2 nA max. off-leakage prevents DC offset accumulation in high-impedance electrode paths. | Use Scenario: Professional audio mixers routing balanced line-level signals between processing stages with minimal coloration. IC Role / Device Role / Timing Role: Switches differential audio paths (XLR/TRS) while preserving common-mode rejection and signal symmetry. Use Value: 17 Ω RDS(on) and <3 Ω matching ensure channel-to-channel gain consistency across the audio band. |
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 |
|---|---|---|---|
| MAX4674ESE+ | Higher RDS(on) (45 Ω typ.), slower tON (75 ns), but offers 1.8 V logic compatibility and wider temp range (−40°C to +105°C) | Preferred for ultra-low-voltage microcontroller interfaces where 3 V logic margin is insufficient | Select MAX4674ESE+ only if system uses 1.8 V I/O and requires extended temperature operation beyond +85°C |
| ADG409BRZ | Higher leakage (10 nA max.), no guaranteed break-before-make, but provides 20 V supply capability and better high-frequency isolation (>90 dB @ 100 kHz) | Suitable for industrial HV signal conditioning where extended voltage range outweighs leakage sensitivity | Choose ADG409BRZ when analog signals exceed ±6 V or when >90 dB off-isolation at 100 kHz is mandatory |
Compared with MAX4674ESE+ and ADG409BRZ, DG409LDY delivers superior low-leakage performance (0.2 nA vs. 10 nA), guaranteed break-before-make timing, and lower on-resistance (17 Ω vs. 45–50 Ω), making it optimal for precision, low-power, and cost-sensitive portable instrumentation.
Availability
DG409LDY is available at Aetrix Electronics and suitable for portable test equipment, battery-powered medical devices, and industrial data acquisition systems requiring stable component supply and long-term obsolescence management.
Supply support for DG409LDY 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 semiconductor manufacturer specializing in discrete components and analog ICs, with leadership in power MOSFETs, diodes, optoelectronics, and precision analog switches.
The DG409LDY belongs to Vishay's DG40xL low-voltage analog switch family, engineered for high-fidelity signal routing in space-constrained, low-power applications where rail-to-rail operation and minimal distortion are essential.
FAQ
What is the maximum analog signal voltage range supported by the DG409LDY?
The DG409LDY supports analog signals from V− to V+, covering 0 V to 12 V in single-supply mode or −5 V to +5 V in ±5 V dual-supply mode. At V+ = 12 V and V− = 0 V, the full analog range is 0–12 V; at V+ = 5 V and V− = −5 V, it is −5 V to +5 V. Exceeding these limits risks clamping by internal protection diodes.
Does the DG409LDY require external pull-up resistors on its address or enable pins?
No, the DG409LDY does not require external pull-up resistors. Its digital inputs (A0, A1, EN) have CMOS-compatible thresholds and draw less than ±1.5 μA input current. Internal biasing is sufficient for clean logic-level recognition when driven directly from microcontrollers or FPGAs operating at 3 V or 5 V.
How is break-before-make timing ensured in the DG409LDY?
Break-before-make timing in the DG409LDY is guaranteed by internal logic design-not statistical behavior. The device enforces a minimum 1 ns open interval (tOPEN) between channel deactivation and activation during address changes, verified across temperature and voltage. This prevents momentary shorting between differential inputs, critical for protecting sensitive sources.
Can the DG409LDY operate from a 3.3 V single supply?
Yes, the DG409LDY is fully specified for 3 V operation. At V+ = 3 V, it delivers 60 Ω typical RDS(on), 70 ns tON(EN), and maintains 0.2 nA max. off-leakage. Logic inputs accept 0.4 V (low) and 2.0 V (high) thresholds, ensuring reliable interface with 3.3 V microcontrollers without level translation.
What is the thermal derating behavior of the DG409LDY in SOIC-16 package?
In its 16-pin narrow SOIC package, the DG409LDY has a power dissipation limit of 600 mW at 25 °C, derating linearly at 7.6 mW/°C above 75 °C. At 105 °C ambient, usable power drops to approximately 372 mW. PCB layout must provide adequate copper area and airflow to maintain junction temperature within −40 °C to +85 °C operating range.
DG409LDY 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):
- 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 FAQ
1.How can I place an order for DG409LDY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG409LDY 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 reliable?
The price and inventory of DG409LDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG409LDY is usually 5 days.
3.What payment methods are accepted for DG409LDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG409LDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG409LDY?
DG409LDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG409LDY 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?
For technical support, including DG409LDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG409LDY requirements.
6.How does Aetrix verify that DG409LDY is sourced from the original manufacturer or authorized distributors?
All DG409LDY 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 meets industry standards.
7.What is the process for return or replacement of DG409LDY?
All DG409LDY units undergo pre-shipment inspection (PSI). If there is an issue with DG409LDY, 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 part is unused and in its original packaging.
Return procedure for DG409LDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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