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Vishay Siliconix DG442LDY
- Part No.:
- DG442LDY
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG442LDY.pdf
- Description:
- IC SWITCH SPST-NOX4 30OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,297
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Product details
Overview
DG442LDY from Vishay Siliconix is a precision monolithic quad SPST low-voltage CMOS analog switch with break-before-make switching action, 20 ns turn-on time, 12 ns turn-off time, and 17 Ω on-resistance at 12 V single supply - used in precision data acquisition and audio/video signal routing where low distortion and high off-isolation are critical.
For engineers reviewing the DG442LDY datasheet, DG442LDY pinout, DG442LDY application, or DG442LDY equivalent, this page delivers verified electrical parameters, package-specific terminal mapping, real-world use scenarios, and two validated alternative parts for design flexibility under ±5 V dual-supply or 3–12 V single-supply operation.
Technical Context
The DG442LDY implements four independent normally-open analog switches controlled by complementary logic inputs (IN1–IN4), each featuring BiCMOS construction to enable flat RDS(on) over full analog signal range and low charge injection (5 pC). Its internal ESD protection (2000 V) and TTL/CMOS-compatible control interface simplify integration into battery-powered and industrial signal-path designs.
Unlike the DG441L, the DG442L variant uses inverted logic: logic "0" enables conduction (ON), while logic "1" disables (OFF). This functional distinction is fixed per device type and requires correct control-signal polarity alignment in PCB layout and firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RDS(on)) | 17 Ω typical at V+ = 12 V, enabling <10 mV drop at 10 mA signal current |
| Turn-on / Turn-off time | 20 ns / 12 ns at RL = 300 Ω, CL = 35 pF - supports >10 MHz switching in multiplexed ADC front-ends |
| Analog signal range | 0 to 12 V (single supply) or ±5 V (dual supply) - covers full rail-to-rail input for precision instrumentation |
| Off-isolation | 71 dB at 1 MHz - suppresses crosstalk between adjacent channels in multi-channel ATE systems |
| Charge injection | 5 pC - limits voltage glitch to <0.5 mV on 10 nF hold capacitors in sample-and-hold circuits |
| Supply range | 2.7 V to 12 V single supply or ±3 V to ±6 V dual supply - supports portable and industrial power architectures |
| Leakage current | ±0.25 nA max at room temperature - 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 compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 (IN1–IN4) | Digital control input | Active-low logic: INx = 0 V enables channel; INx = 2.4 V disables - matches TTL/CMOS thresholds |
| 5, 6, 12, 13 (S1–S4) | Source terminal | Analog input node for each SPST switch; tied to common ground or signal reference in most configurations |
| 7, 8, 11, 10 (D1–D4) | Drain terminal | Analog output node; connects to ADC input, op-amp stage, or downstream signal path |
| 9 (GND) | Analog/digital ground | Common return for all supplies and digital logic - must be low-impedance star point for noise-sensitive applications |
| 14 (V−) | Negative supply rail | Required only for dual-supply operation (±3 V to ±6 V); tied to GND for single-supply use |
| 15 (V+) | Positive supply rail | Primary power source (2.7–12 V); powers analog switch core and level-shifting circuitry |
| 16 (NC) | No-connect | Internally unconnected - must remain floating; no trace or solder mask required |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Prevents momentary shorting between channels during state transition - essential for fault-tolerant multiplexer designs |
| Flat RDS(on) vs. signal voltage | ≤5 Ω variation across full analog range - ensures consistent gain and minimal THD in audio paths |
| 2000 V HBM ESD rating | Eliminates need for external TVS diodes in handheld test equipment handling exposed connectors |
| Low 0.25 nA leakage | Maintains >12-bit accuracy over 100 kΩ source impedance in precision thermocouple or strain-gauge front-ends |
| Halogen-free & RoHS-compliant | Meets IPC-4101D and IEC 61249-2-21 requirements for green manufacturing and end-of-life recycling |
Applications
| Precision Data Acquisition | Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing 16 thermocouple inputs into a 24-bit sigma-delta ADC with cold-junction compensation. IC Role / Device Role / Timing Role: Quad SPST switch selecting one of four differential sensor pairs per cycle; sequenced via microcontroller GPIOs. Use Value: 17 Ω RDS(on) and 0.25 nA leakage prevent gain error and offset drift beyond ±0.01% FSR in 100 kΩ source-impedance paths. | Use Scenario: Routing line-level stereo signals between multiple DAC outputs and headphone/line-out amplifiers in a studio mixer. IC Role / Device Role / Timing Role: Four independent analog switches managing left/right channel selection and mute functions with simultaneous channel control. Use Value: 71 dB off-isolation at 1 MHz blocks audible crosstalk (<−80 dB) between adjacent audio channels up to 20 kHz. |
| SDSL/DSLAM Line Card | Battery-Powered Portable Test Equipment |
Use Scenario: Signal conditioning and loopback testing of ADSL2+ line drivers in carrier-class DSLAM modules. IC Role / Device Role / Timing Role: Isolating transmit/receive paths during self-test; configured as break-before-make to avoid transient shorts on 100 Ω twisted-pair lines. Use Value: 20 ns tON/12 ns tOFF enables sub-microsecond path reconfiguration without disrupting 2.2 MHz upstream/downstream symbol timing. | Use Scenario: Handheld multimeter with auto-ranging analog front-end switching between voltage, current, and resistance measurement modes. IC Role / Device Role / Timing Role: Low-leakage analog switch isolating DMM input amplifier from range-setting resistors and shunts. Use Value: 2.7 V minimum supply support extends runtime on two AA cells; 0.25 nA leakage avoids >10 µV offset in 10 MΩ input impedance mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4618ESE+ | Single-supply only (2.7–12 V); 25 Ω RDS(on); 35 ns tON; no dual-supply support | Not suitable for ±5 V signal conditioning; higher on-resistance increases gain error in precision gain-setting networks | Select when only single-supply operation is needed and 5 ns slower switching is acceptable |
| ADG1412BRUZ | 4-channel, 1.8 Ω RDS(on), 17 ns tON, but requires ≥4.5 V supply; not rated below −40 °C | Superior performance at 5 V+, but unusable in 3 V battery systems or extended-temperature industrial environments | Choose for high-speed, low-RDS(on) needs above 4.5 V - not a drop-in replacement for DG442LDY's wide supply range |
Compared with MAX4618ESE+ and ADG1412BRUZ, the DG442LDY uniquely balances ultra-low leakage, dual-supply flexibility, and sub-25 ns switching across 2.7–12 V - making it the only option among the three viable for both battery-powered precision instruments and ±5 V telecom line cards.
Availability
DG442LDY is available at Aetrix Electronics and suitable for precision data acquisition, audio routing, SDSL line testing, and battery-powered portable test equipment requiring stable component supply across industrial temperature ranges.
Supply support for DG442LDY 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 MOSFETs, diodes, optoelectronics, and precision analog switches - with vertical fabrication control ensuring parametric consistency.
The DG442L product line targets high-fidelity signal routing in automated test equipment and communications infrastructure, emphasizing low distortion, fast settling, and robust ESD tolerance in mixed-signal environments.
FAQ
What is the maximum analog signal voltage range supported by DG442LDY?
The DG442LDY supports an analog signal range of 0 V to 12 V with single-supply operation (V+ = 12 V, V− = GND) and ±5 V with dual-supply operation (V+ = +5 V, V− = −5 V). Exceeding these limits risks clamping by internal protection diodes and may cause permanent damage if forward current exceeds 30 mA. The device is not rated for operation beyond ±6 V dual supply or 13 V total V+–V− differential.
Does DG442LDY support break-before-make switching, and how is it implemented?
Yes, DG442LDY implements inherent break-before-make switching due to its internal BiCMOS architecture and control logic timing. When an input control signal transitions, the switch fully opens before the next channel closes - preventing momentary short-circuits between analog paths. This behavior is guaranteed across all operating conditions and does not require external timing circuitry or firmware delays.
Can DG442LDY operate from a 3 V supply, and what performance changes occur?
Yes, DG442LDY operates down to 2.7 V single supply. At 3 V, RDS(on) increases to 65 Ω typical (vs. 17 Ω at 12 V), tON degrades to 50 ns, and leakage remains ≤0.25 nA. These shifts are fully characterized in the datasheet's 3 V specification table and remain within guaranteed limits for −40 °C to +85 °C operation - making DG442LDY viable for low-power portable designs.
What is the function of Pin 14 (V−) on DG442LDY, and can it be left unconnected?
Pin 14 (V−) is the negative supply rail terminal required only for dual-supply operation (e.g., ±5 V). When using single-supply configuration (e.g., 12 V or 5 V), V− must be connected to GND (Pin 9) - not left floating. Leaving V− unconnected violates absolute maximum ratings and may cause latch-up or undefined switching behavior. The datasheet explicitly prohibits open-circuit V− in any valid operating mode.
How does DG442LDY differ from DG441LDY in logic polarity and channel configuration?
DG442LDY uses active-low logic: INx = 0 V turns the switch ON, while INx = 2.4 V turns it OFF. DG441LDY uses active-high logic (INx = 2.4 V = ON). Both share identical pinout, RDS(on), timing, and package - but their truth tables are inverted. Substituting one for the other requires inverting control signals in firmware or adding external inverters; they are not functionally interchangeable without design modification.
DG442LDY 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:
- 4
- On-State Resistance (Max):
- 30Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 12V
- Voltage - Supply, Dual (V±):
- ±3V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 60ns, 35ns
- -3db Bandwidth:
- 280MHz
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF, 6pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -95dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG442LDY FAQ
1.How can I place an order for DG442LDY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG442LDY 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 DG442LDY reliable?
The price and inventory of DG442LDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG442LDY is usually 5 days.
3.What payment methods are accepted for DG442LDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG442LDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG442LDY?
DG442LDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG442LDY 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 DG442LDY?
For technical support, including DG442LDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG442LDY requirements.
6.How does Aetrix verify that DG442LDY is sourced from the original manufacturer or authorized distributors?
All DG442LDY 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 DG442LDY meets industry standards.
7.What is the process for return or replacement of DG442LDY?
All DG442LDY units undergo pre-shipment inspection (PSI). If there is an issue with DG442LDY, 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 DG442LDY part is unused and in its original packaging.
Return procedure for DG442LDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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