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Vishay Siliconix DG419LDY
- Part No.:
- DG419LDY
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG419LDY.pdf
- Description:
- IC SWITCH SPDT X 1 20OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,264
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Product details
Overview
DG419LDY from Maxim Integrated is a precision SPDT analog switch with +3V logic-compatible control, 35Ω max on-resistance, guaranteed 3Ω max RON matching between NC/NO channels, and rail-to-rail analog signal handling from ±4.5V to ±20V or +9V to +36V. It operates across –40°C to +85°C and is used in audio routing, test equipment, and battery-powered communications systems.
For engineers reviewing the DG419LDY datasheet, DG419LDY pinout, DG419LDY application, or DG419LDY equivalent, key selection criteria include its break-before-make timing (1ns min), <5nA off-leakage at +85°C, low 2.5pC charge injection, and compatibility with TTL/CMOS logic without supply sequencing constraints.
Technical Context
The DG419LDY implements a CMOS transmission-gate architecture with matched P- and N-channel devices per switch path, enabling bidirectional conduction and rail-to-rail analog voltage support. Its digital input thresholds (VIH = 2.0V, VIL = 0.8V) are fixed and independent of supply voltage, ensuring robust +3V logic interfacing across full dual or single-supply ranges.
It features integrated ESD protection and internal clamp diodes on analog terminals, allowing safe operation with signals exceeding V+ or V– by up to 0.3V. The device guarantees monotonic on-resistance flatness (≤4Ω max over signal range) and channel-to-channel RON matching-critical for precision multiplexing and sample-and-hold accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | SPDT with one normally closed (NC) and one normally open (NO) path - enables signal path selection without external logic inversion. |
| On-Resistance (RON) | 35Ω max at ±15V supplies - ensures minimal signal attenuation and gain error in precision instrumentation paths. |
| RON Matching | 3Ω max between NC and NO channels - preserves amplitude integrity when switching between reference and signal paths. |
| Off-Leakage Current | <5nA at +85°C - prevents DC error accumulation in high-impedance sample-and-hold or sensor front-ends. |
| Charge Injection | 2.5pC typical (single +12V) - limits voltage glitch on sampled nodes, supporting ≤12-bit settling in data acquisition. |
| Break-Before-Make Delay | 1ns minimum - eliminates momentary short-circuit risk during channel switching in power-sensitive analog routing. |
| Logic Compatibility | +3V TTL/CMOS with VIH = 2.0V, VIL = 0.8V - interfaces directly with microcontrollers and FPGAs without level-shifting. |
Pinout & Package
DG419LDY is housed in an 8-pin SO (Small Outline) package, measuring 4.9mm × 6.0mm × 1.75mm, with standard 1.27mm pitch and gull-wing leads suitable for automated assembly and IPC-compliant reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | COM | Analog common terminal - connects to signal source or load; bidirectional current path shared by both NC and NO switches. |
| 2 | NC | Normally closed analog terminal - conducts to COM when IN = logic low (0.8V); default path for fail-safe routing. |
| 3 | GND | Digital logic ground reference - must be tied to system digital ground; not connected to analog ground plane unless star-point referenced. |
| 4 | V+ | Positive analog supply - supports +9V to +36V single supply or ±4.5V to ±20V dual supply; powers internal switch circuitry. |
| 5 | N.C. | No connection - internally unconnected; must remain floating or grounded per layout best practices to avoid noise coupling. |
| 6 | IN | Active-high digital control input - transitions switch state at 2.0V threshold; compatible with 3.3V and 5V logic families. |
| 7 | V− | Negative analog supply - required for bipolar operation; sets lower rail for analog signal swing and internal bias generation. |
| 8 | NO | Normally open analog terminal - conducts to COM only when IN = logic high (2.0V); enables selective signal activation. |
Key Features
| Feature | Design Value |
|---|---|
| Power-supply sequencing-free operation | Eliminates mandatory V+, VL, then V− startup order - simplifies power management in multi-rail systems and avoids latch-up risk. |
| Rail-to-rail analog signal handling | Supports input signals from V− to V+ - enables full dynamic range utilization in ±15V op-amp circuits or +36V industrial sensors. |
| Guaranteed RON flatness (≤4Ω) | Minimizes harmonic distortion and amplitude nonlinearity across signal range - critical for audio and measurement applications. |
| Low 15pC charge injection (±15V) | Reduces sampling glitch magnitude - allows direct interface with 12-bit SAR ADCs without hold-capacitor buffering. |
| Plug-in upgrade for DG419/MAX319 | Pin- and function-compatible replacement - enables drop-in reliability and performance improvement in legacy designs without PCB change. |
Applications
| Audio Signal Routing | Test Equipment Multiplexing |
|---|---|
|
Use Scenario: Switching between microphone inputs and line-level outputs in portable audio mixers. IC Role / Device Role / Timing Role: SPDT analog switch controlling signal path selection under microcontroller GPIO control. Use Value: 35Ω RON and 2.5pC charge injection prevent audible pop/click and preserve THD <0.002% across 20Hz–20kHz. |
Use Scenario: Channel selection in automated test equipment scanning multiple DUTs to a shared measurement front-end. IC Role / Device Role / Timing Role: Precision SPDT switch enabling sequential analog signal routing with sub-200ns switching. Use Value: Guaranteed 3Ω RON matching ensures consistent gain scaling across channels, reducing calibration overhead. |
| Battery-Operated Modems | Military Radio Signal Conditioning |
|
Use Scenario: Selecting between voiceband and data-band filters in low-power modem ICs powered from 3.3V or Li-ion cells. IC Role / Device Role / Timing Role: Low-leakage analog switch isolating unused filter paths to minimize standby current. Use Value: <5nA off-leakage at +85°C extends battery life and maintains signal integrity during sleep modes. |
Use Scenario: RF front-end signal gating and antenna switching in ruggedized HF/VHF transceivers operating across –40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability SPDT switch managing transmit/receive path isolation under extreme temperature cycling. Use Value: Extended temperature rating and ±20V dual-supply support ensure stable operation in unregulated military power environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4619EUA+ | Lower RON (15Ω), but only rated to +70°C; requires separate logic supply (VL) and strict power sequencing. | Not suitable for extended-temperature industrial or military use; higher drive complexity due to VL pin. | Select DG419LDY when extended temperature range, sequencing-free operation, or guaranteed RON matching are required. |
| ADG1419BRMZ | Higher supply voltage limit (±22V), but 44Ω RON; no guaranteed RON matching spec; 10pC charge injection. | Acceptable for general-purpose routing where precision matching is non-critical; larger SO-10 package. | Choose DG419LDY for tighter RON matching, lower leakage, and smaller 8-pin SO footprint in space-constrained designs. |
Compared with MAX4619EUA+ and ADG1419BRMZ, DG419LDY uniquely combines extended temperature rating, sequencing-free operation, guaranteed 3Ω RON matching, and 8-pin SO packaging - making it optimal for precision, high-reliability analog multiplexing where channel consistency and thermal robustness are essential.
Availability
DG419LDY is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and battery-operated modems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for DG419LDY 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
DG419LDY belongs to Maxim's precision analog switch product line, designed specifically for applications demanding low distortion, tight channel matching, and robust operation across wide supply and temperature ranges.
FAQ
What is the maximum supply voltage rating for DG419LDY?
The DG419LDY supports dual supplies from ±4.5V to ±20V and single supplies from +9V to +36V. Absolute maximum ratings specify V+ to V− ≤ 44V and V+ to GND ≤ 25V. Exceeding these may cause permanent damage, and operation beyond ±20V or +36V is not characterized or guaranteed.
Does DG419LDY require power-supply sequencing during startup?
No, DG419LDY does not require power-supply sequencing. Unlike legacy DG419 or MAX319 devices, it eliminates the need for a dedicated VL pin and supports arbitrary power-up order of V+, V−, and GND - preventing latch-up and simplifying system power design.
What is the guaranteed on-resistance matching between NC and NO channels in DG419LDY?
DG419LDY guarantees ≤3Ω maximum on-resistance matching (∆RON) between its NC and NO channels under dual ±15V supplies and TMIN to TMAX. This specification is tested and ensured across the full operating temperature range, enabling precision ratio-metric signal routing.
Can DG419LDY operate with a single +12V supply?
Yes, DG419LDY fully supports single +12V operation (V+ = +12V, V− = 0V). In this configuration, analog signal range is 0V to +12V, RON is ≤125Ω, and tON/tOFF remain under 400ns - making it suitable for industrial PLC I/O modules and portable instrumentation.
Is DG419LDY pin-compatible with the original DG419?
Yes, DG419LDY is pin-compatible and functionally equivalent to the industry-standard DG419, offering plug-in upgrades with improved specs: lower leakage (<5nA vs. <25nA), tighter RON matching (3Ω vs. 5Ω), and sequencing-free operation - all in the same 8-pin SO package.
DG419LDY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 20Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 2.7V ~ 12V
- Voltage - Supply, Dual (V±):
- ±3V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 43ns, 31ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -71dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DG419LDY FAQ
1.How can I place an order for DG419LDY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG419LDY 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 DG419LDY reliable?
The price and inventory of DG419LDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG419LDY is usually 5 days.
3.What payment methods are accepted for DG419LDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG419LDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG419LDY?
DG419LDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG419LDY 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 DG419LDY?
For technical support, including DG419LDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG419LDY requirements.
6.How does Aetrix verify that DG419LDY is sourced from the original manufacturer or authorized distributors?
All DG419LDY 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 DG419LDY meets industry standards.
7.What is the process for return or replacement of DG419LDY?
All DG419LDY units undergo pre-shipment inspection (PSI). If there is an issue with DG419LDY, 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 DG419LDY part is unused and in its original packaging.
Return procedure for DG419LDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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