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Analog Devices Inc./Maxim Integrated DG419LDY+T
- Part No.:
- DG419LDY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG419LDY+T.pdf
- Description:
- IC SWITCH SPDT X 1 35OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,727
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Product details
Overview
DG419LDY+T 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+T datasheet, DG419LDY+T pinout, DG419LDY+T application, or DG419LDY+T equivalent, key selection criteria include its break-before-make timing (≤30ns), low 5nA off-leakage at +85°C, <2.5pC charge injection, and compatibility with TTL/CMOS logic without supply sequencing constraints.
Technical Context
The DG419LDY+T implements a CMOS transmission-gate architecture with dual-supply operation (±4.5V to ±20V) or single-supply mode (+9V to +36V), enabling symmetric or asymmetric analog signal ranges. Its digital input thresholds (VIL = 0.8V, VIH = 2.0V) ensure robust +3V logic interfacing independent of supply ramp order.
It features true break-before-make switching (tD ≤ 30ns), matched channel conduction (ΔRON ≤ 3Ω), and flat on-resistance (<6Ω variation over full signal range), making it suitable for precision sample-and-hold and multiplexed sensor interfaces where gain/offset tracking is critical.
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. |
| Max On-Resistance | 35Ω at ±15V supplies - ensures minimal signal attenuation and voltage drop in low-level analog paths. |
| RON Matching | ≤3Ω max difference between NC and NO channels - preserves amplitude balance in differential or dual-path routing. |
| Charge Injection | ≤2.5pC - reduces sampling error and pedestal distortion in precision ADC front-ends and sample-and-hold circuits. |
| Off-Leakage Current | <5nA at +85°C - maintains high-impedance isolation in battery-critical or high-temperature industrial monitoring. |
| Supply Range | ±4.5V to ±20V (dual) or +9V to +36V (single) - supports wide-range industrial sensors and legacy ±15V systems. |
| Logic Compatibility | +3V TTL/CMOS with VIL = 0.8V, VIH = 2.0V - eliminates level-shifting when driven by microcontrollers or FPGAs. |
Pinout & Package
Package: 8-pin SO (Small Outline); RoHS-compliant, surface-mount, 150 mil body width, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | COM | Analog common terminal - connects to signal source or load; bidirectional conduction path shared by NC and NO. |
| 2 | N.C. | No connection - unconnected die pad; must be left floating or tied to GND per layout best practice. |
| 3 | GND | Digital logic ground reference - provides return path for control inputs and decouples logic noise from analog sections. |
| 4 | V+ | Positive analog supply - sets upper rail for analog signal swing; must be ≥ |V−| + 9V in dual-supply mode. |
| 5 | IN | Active-high logic control input - drives internal gate bias; 0.8V/2.0V thresholds enable direct interface with +3V I/O. |
| 6 | V− | Negative analog supply - defines lower analog rail; required for bipolar signal handling and rail-to-rail operation. |
| 7 | NC | Normally closed analog terminal - conducts to COM when IN = LOW; used for default-path or fail-safe routing. |
| 8 | NO | Normally open analog terminal - conducts to COM when IN = HIGH; enables active-selection signal routing. |
Key Features
| Feature | Design Value |
|---|---|
| Power-supply sequencing-free operation | Eliminates mandatory V+/V−/VL 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 utilization of supply rails in data acquisition and audio line drivers. |
| Guaranteed RON flatness | ≤4Ω variation across full analog range - minimizes harmonic distortion and gain nonlinearity in AC-coupled paths. |
| Low off-isolation degradation with frequency | -90dB at 1MHz - maintains channel separation in RF-adjacent or high-bandwidth multiplexing applications. |
| Tiny 8-pin SO package | Standard SOIC footprint with 1.27mm pitch - enables high-density PCB layouts without requiring custom land patterns. |
Applications
| Audio Signal Routing | Test Equipment Multiplexing |
|---|---|
|
Use Scenario: Switching between microphone inputs and line outputs in portable audio interfaces. IC Role / Device Role / Timing Role: SPDT analog switch selecting between two analog signal paths under microcontroller control. Use Value: Low 2.5pC charge injection prevents audible click/pop artifacts during real-time audio switching. |
Use Scenario: Channel selection in automated test equipment (ATE) for sensor calibration sequences. IC Role / Device Role / Timing Role: Precision analog multiplexer routing DUT signals to measurement circuitry with minimal crosstalk. Use Value: -90dB off-isolation and ≤3Ω RON matching ensure measurement accuracy across multiple channels. |
| Battery-Operated Modems | Military Radio Front-Ends |
|
Use Scenario: Signal path reconfiguration in low-power fax/modem ICs powered from single +12V supply. IC Role / Device Role / Timing Role: Low-leakage SPDT switch enabling standby-mode isolation of analog codec sections. Use Value: <5nA off-leakage at +85°C extends battery life and prevents signal bleed during sleep states. |
Use Scenario: Antenna or filter bank switching in ruggedized HF/VHF transceivers operating across -40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability analog switch handling RF-adjacent baseband signals in harsh environments. Use Value: Extended temperature rating and ±20V dual-supply tolerance support MIL-STD-810G environmental compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4619ESE+ | Lower RON (15Ω), but only rated to +70°C; requires external pull-down on IN for default NC state. | Not qualified for extended temperature industrial use; unsuitable for military or automotive ambient conditions. | Select when lower on-resistance is prioritized over temperature range and no external biasing can be added. |
| ADG1419BRMZ | Higher supply voltage limit (±22V), but higher charge injection (6pC); uses different pinout (IN on Pin 3, not Pin 5). | Requires PCB redesign due to non-compatible pin mapping; less suitable for drop-in replacement in existing DG419L layouts. | Choose when wider supply range is needed and board revision is acceptable for improved voltage margin. |
Compared with MAX419ESE+ and ADG1419BRMZ, the DG419LDY+T uniquely balances extended temperature operation, guaranteed RON matching, and pin-compatible upgrade path from legacy DG419 designs-making it optimal for field-replaceable industrial modules and legacy system refreshes.
Availability
DG419LDY+T is available at Aetrix Electronics and suitable for audio signal routing, test equipment multiplexing, and battery-operated modems requiring stable component supply across industrial temperature grades and long production lifecycles.
Supply support for DG419LDY+T 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 computing markets.
The DG419LDY+T belongs to Maxim's precision analog switch product line, designed specifically for applications demanding low distortion, tight channel matching, and seamless +3V logic integration in harsh or space-constrained environments.
FAQ
What is the maximum allowable supply voltage for DG419LDY+T?
The DG419LDY+T supports dual-supply operation up to ±20V and single-supply operation up to +36V. Absolute maximum ratings specify V+ to V− ≤ 44V and V+ to GND ≤ 25V. Exceeding these limits risks permanent damage. For reliable operation, stay within the recommended ranges: ±4.5V to ±20V (dual) or +9V to +36V (single). The DG419LDY+T datasheet confirms these values under Absolute Maximum Ratings.
Does DG419LDY+T require power-supply sequencing during startup?
No, the DG419LDY+T features power-supply sequencing-free operation - a key improvement over legacy DG419 devices. It eliminates the need for strict V+, VL, then V− ramp order, preventing latch-up without external diodes. This behavior is confirmed in the Applications Information section of the DG419LDY+T datasheet and applies across its full -40°C to +85°C operating range.
What is the logic polarity of the IN pin on DG419LDY+T?
The IN pin on DG419LDY+T is active-high: when IN = LOW (≤0.8V), the NC path conducts; when IN = HIGH (≥2.0V), the NO path conducts. This is explicitly defined in the Truth Table and Pin Description sections of the DG419LDY+T datasheet. No external inversion is needed for standard +3V logic control.
Can DG419LDY+T handle bipolar analog signals?
Yes, the DG419LDY+T supports true bipolar analog signal routing from V− to V+ when operated with dual supplies (e.g., ±15V). Its rail-to-rail capability and symmetric on-resistance profile allow undistorted passage of AC signals centered at 0V. This functionality is verified in the Analog Signal Range and RON Flatness specifications for the DG419LDY+T under dual-supply conditions.
Is DG419LDY+T pin-compatible with the original DG419?
Yes, DG419LDY+T maintains identical pinout, package dimensions, and functional behavior as the legacy DG419, including COM, NC, NO, V+, V−, IN, GND, and N.C. pin assignments. The "L" suffix denotes enhanced specs (e.g., lower leakage, sequencing freedom) while preserving mechanical and electrical compatibility - confirmed in the Ordering Information and Pin Configuration diagrams of the DG419LDY+T datasheet.
DG419LDY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- 15pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -86dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DG419LDY+T FAQ
1.How can I place an order for DG419LDY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DG419LDY+T 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+T reliable?
The price and inventory of DG419LDY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG419LDY+T is usually 5 days.
3.What payment methods are accepted for DG419LDY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG419LDY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG419LDY+T?
DG419LDY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG419LDY+T 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+T?
For technical support, including DG419LDY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG419LDY+T requirements.
6.How does Aetrix verify that DG419LDY+T is sourced from the original manufacturer or authorized distributors?
All DG419LDY+T 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+T meets industry standards.
7.What is the process for return or replacement of DG419LDY+T?
All DG419LDY+T units undergo pre-shipment inspection (PSI). If there is an issue with DG419LDY+T, 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+T part is unused and in its original packaging.
Return procedure for DG419LDY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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