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Vishay Siliconix DG418DY
- Part No.:
- DG418DY
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG418DY.pdf
- Description:
- IC SWITCH SPST-NOX1 35OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,801
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Product details
Overview
DG418DY from Vishay Siliconix is a precision single-pole, single-throw (SPST), normally-open (NO) CMOS analog switch designed for high-fidelity signal routing in low-power instrumentation. It delivers 20 Ω on-resistance, ±15 V analog signal range, 100 ns turn-on time, ultra-low 35 nW power dissipation, and operates across –40 °C to +85 °C in narrow SOIC-8 package.
For engineers reviewing the DG418DY datasheet, DG418DY pinout, DG418DY application, or DG418DY equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The DG418DY implements a complementary MOSFET switch architecture with epitaxial latch-up protection and high-voltage silicon gate (HVSG) process technology. It supports dual-supply (±15 V) and single-supply (up to 40 V) operation, with TTL/CMOS-compatible digital control inputs referenced to VL (logic supply).
Unlike the DG417 (normally-closed), the DG418DY activates on logic-high input (IN ≥ 2.4 V), enabling direct interface with microcontroller GPIOs without level-shifting. Its break-before-make behavior is not guaranteed-only the DG419 SPDT variant specifies it.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V - supports full-rail bipolar signal switching without clipping in precision test equipment. |
| On-Resistance (RDS(on)) | 20 Ω typ. - ensures minimal gain error and THD degradation in audio and instrumentation amplifier signal paths. |
| Turn-On Time (ton) | 100 ns typ. - enables reliable multiplexing of signals up to ~3 MHz bandwidth in data acquisition systems. |
| Supply Current (I+ / I−) | 1 μA max. at full temperature range - sustains micropower operation in battery-backed memory retention circuits. |
| Charge Injection | 60 pC - limits voltage glitch amplitude to <1 mV in sample-and-hold stages using 10 nF hold capacitors. |
| Off-Leakage Current | ±0.25 nA max. at full temperature - preserves accuracy in high-impedance sensor front-ends (e.g., pH electrodes). |
| Logic Supply (VL) | 5 V - compatible with standard microcontroller I/O rails; no separate logic-level translator required. |
Pinout & Package
Package: Narrow SOIC-8 (JEDEC MS-012), 5.0 mm × 4.0 mm × 1.5 mm body, gull-wing leads, RoHS-compliant (Pb-free, E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Source terminal | Analog input/output node; bidirectional conduction when switch is ON; blocks up to ±15 V when OFF. |
| 2 (D) | Drain terminal | Analog output/input node; electrically symmetric with S; same RDS(on) and leakage performance. |
| 3 (NC) | No-connect | Internally unconnected; must remain floating-no PCB trace or component attachment permitted. |
| 4 (V−) | Negative supply rail | Bias reference for analog channel; must be decoupled to GND with ≥0.1 μF ceramic capacitor. |
| 5 (GND) | Digital ground | Reference for logic inputs and VL; should be star-connected to analog ground at single point. |
| 6 (IN) | Digital control input | Active-HIGH enable: switch closes when IN ≥ 2.4 V; opens when IN ≤ 0.8 V (TTL/CMOS compatible). |
| 7 (V+) | Positive supply rail | Bias reference for analog channel; rated up to +44 V absolute max; requires local decoupling. |
| 8 (VL) | Logic supply voltage | Supplies internal level-shifter; must be 5 V (not tied to V+); powers input buffer independently of analog rails. |
Key Features
| Feature | Design Value |
|---|---|
| Precision analog switching | 20 Ω RDS(on) with <1 Ω variation over ±12.5 V signal swing-enables <0.01% gain error in 12-bit+ systems. |
| Ultra-low power consumption | 35 nW typical quiescent power-extends battery life in portable DMMs and handheld analyzers beyond 10 years. |
| High-voltage silicon gate (HVSG) process | Enables 44 V absolute max V+ rating and robust ESD tolerance (>2 kV HBM)-suitable for industrial fieldbus interfaces. |
| Epitaxial latch-up immunity | Guaranteed no latch-up under worst-case transient conditions-critical for military radios and avionics signal routing. |
| Miniature SOIC-8 footprint | 5.0 × 4.0 mm area-reduces PCB space by >60% vs. legacy DIP-8 switches while maintaining thermal derating compliance. |
Applications
| Precision Test Equipment | Sample-and-Hold Circuits |
|---|---|
|
Use Scenario: Multiplexing calibrated reference voltages into automated test equipment (ATE) calibration channels. IC Role / Device Role / Timing Role: SPST analog switch selecting between multiple precision voltage sources before ADC sampling. Use Value: 20 Ω RDS(on) and <0.25 nA off-leakage prevent reference loading and drift, preserving 16-bit measurement integrity. |
Use Scenario: Isolating the hold capacitor during acquisition phase in high-resolution data loggers. IC Role / Device Role / Timing Role: Low-charge-injection (60 pC) switch disconnecting op-amp output from hold capacitor. Use Value: Limits hold-step error to <0.5 mV with 10 nF capacitor-supports accurate 14-bit sampling at 100 kSPS. |
| Battery-Powered Systems | Military Radios |
|
Use Scenario: Enabling backup power path selection during main supply brownout in portable medical monitors. IC Role / Device Role / Timing Role: Micropower (1 μA max) transfer switch activating Li-ion backup cell upon VCC drop detection. Use Value: 35 nW standby power ensures >5-year shelf life for emergency-use devices without self-discharge penalty. |
Use Scenario: Routing RF receive chain signals between antenna diversity paths in tactical HF/VHF transceivers. IC Role / Device Role / Timing Role: High-isolation (–60 dB @ 1 MHz) analog switch managing low-noise amplifier inputs. Use Value: 8 pF off-capacitance and ±15 V range support clean switching of 50 Ω baseband signals without crosstalk-induced desense. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4618ESE+ | Higher RDS(on) (35 Ω), slower ton (150 ns), same SOIC-8 package and ±15 V range. | Less suitable for high-speed multiplexing but offers better ESD rating (±4 kV HBM). | Select MAX4618ESE+ where enhanced ESD robustness is prioritized over speed and on-resistance. |
| ADG1418BRUZ | Lower RDS(on) (1.3 Ω), higher supply current (200 μA), requires external logic-level translation for 3.3 V MCU control. | Preferred in high-precision, low-distortion audio routing but incompatible with direct 5 V logic interfacing. | Choose ADG1418BRUZ only when sub-2 Ω on-resistance justifies added complexity and power overhead. |
Compared with DG418DY, MAX4618ESE+ trades speed and resistance for ruggedness, while ADG1418BRUZ delivers superior analog performance at the cost of higher power and interface complexity-neither is pin-compatible, requiring layout revision.
Availability
DG418DY is available at Aetrix Electronics and suitable for precision test equipment, battery-powered medical devices, and military communications systems requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.
Supply support for DG418DY 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 solutions for industrial, automotive, and defense markets.
The DG418DY belongs to Vishay's precision CMOS analog switch family, engineered for low-leakage, low-distortion signal routing in portable and mission-critical instrumentation where board space and power efficiency are constrained.
FAQ
What is the maximum supply voltage rating for DG418DY?
The DG418DY has an absolute maximum V+ rating of +44 V and V− rating of –44 V, with recommended operating range of ±15 V for optimal analog performance. Exceeding ±44 V risks permanent damage, per Vishay Document 70051 Section "Absolute Maximum Ratings".
Does DG418DY support single-supply operation?
Yes, DG418DY supports single-supply operation from 5 V to 40 V. When used with V− = GND, the analog signal range becomes 0 V to V+, e.g., 0–12 V with V+ = 12 V. The VL pin must still be supplied with 5 V independent of V+.
Is DG418DY pin-compatible with DG417DY?
No. Although both are SOIC-8 packaged SPST switches, DG417DY is normally-closed (NC) and DG418DY is normally-open (NO), with opposite logic polarity: DG417 turns ON at logic-low, DG418 at logic-high. PCB layout and firmware logic must be revised for substitution.
What is the purpose of the NC pin (Pin 3) on DG418DY?
Pin 3 is a no-connect terminal-internally unconnected and electrically isolated. It must remain unconnected on the PCB; soldering or routing to this pin may cause unpredictable behavior or reliability issues per Vishay S10-1528 Rev. G Figure 2.
How does DG418DY handle charge injection in sample-and-hold designs?
DG418DY specifies 60 pC typical charge injection. In a 10 nF hold capacitor, this produces a ~6 mV step error. To mitigate, use guard rings, matched switch layouts, or post-switching settling delay-verified in Vishay Application Note 826 for precision hold applications.
DG418DY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 12V
- Voltage - Supply, Dual (V±):
- ±15V
- Switch Time (Ton, Toff) (Max):
- 175ns, 145ns
- -3db Bandwidth:
- -
- Charge Injection:
- 60pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DG418DY FAQ
1.How can I place an order for DG418DY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG418DY 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 DG418DY reliable?
The price and inventory of DG418DY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG418DY is usually 5 days.
3.What payment methods are accepted for DG418DY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG418DY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG418DY?
DG418DY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG418DY 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 DG418DY?
For technical support, including DG418DY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG418DY requirements.
6.How does Aetrix verify that DG418DY is sourced from the original manufacturer or authorized distributors?
All DG418DY 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 DG418DY meets industry standards.
7.What is the process for return or replacement of DG418DY?
All DG418DY units undergo pre-shipment inspection (PSI). If there is an issue with DG418DY, 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 DG418DY part is unused and in its original packaging.
Return procedure for DG418DY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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