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Vishay Siliconix DG442BDY
- Part No.:
- DG442BDY
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG442BDY.pdf
- Description:
- IC SWITCH SPST-NOX4 80OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,684
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Product details
Overview
DG442BDY from Vishay Siliconix is a quad SPST analog switch IC designed for bidirectional signal routing in precision analog and audio paths. It features 45 Ω typical on-resistance, 120 ns typical turn-on time, and ±15 V dual-supply operation - enabling low-distortion switching in data acquisition and sample-and-hold circuits.
For engineers reviewing the DG442BDY datasheet, DG442BDY pinout, DG442BDY application, or DG442BDY equivalent, key selection criteria include guaranteed on-resistance matching (≤4 Ω max), sub-1 pC charge injection, and TTL/CMOS-compatible control logic with single- or dual-supply flexibility.
Technical Context
The DG442BDY implements four independent, normally-open analog switches fabricated using Vishay's high-voltage silicon-gate process with epitaxial latchup protection. Each channel conducts equally in both directions when enabled and blocks signals beyond supply rails when off.
Its logic polarity is inverted versus DG441B: logic high (≥2.4 V) disables all switches, while logic low (≤0.8 V) enables them. Charge injection is minimized at the drain terminal to reduce pedestal error in sample-and-hold topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RDS(on)) | 45 Ω typ. at ±15 V supplies - ensures minimal signal attenuation and gain error in precision gain-setting networks |
| Turn-On Time (tON) | 120 ns typ. into 1 kΩ/35 pF load - supports ≥3 MHz switching rates in multiplexed data acquisition systems |
| Charge Injection (Q) | –1 pC typ. - limits hold-mode voltage step error to <1 mV in 1 nF sample capacitors |
| Off Isolation (OIRR) | –90 dB at 100 kHz - suppresses crosstalk between active and inactive channels in multi-channel instrumentation |
| Analog Signal Range | ±15 V full rail - accommodates industrial sensor outputs and op-amp swing without clipping |
| Supply Current (I+/I–) | ±5 µA max. - enables low-power operation in battery-backed medical devices |
| Logic Compatibility | TTL/CMOS inputs with 0.8 V low / 2.4 V high thresholds - interfaces directly with microcontrollers and FPGAs |
Pinout & Package
DG442BDY is housed in a 16-pin narrow-body SOIC package (JEDEC MS-012, 3.9 × 9.9 mm footprint) with 1.27 mm pitch. The package is RoHS-compliant and rated for –40 °C to +85 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Digital control inputs | Inverted logic: low = switch ON; compatible with 3.3 V/5 V logic families |
| S1–S4 | Switch source terminals | Input side of each SPST path; bidirectional conduction when enabled |
| D1–D4 | Switch drain terminals | Output side; optimized for low charge injection to minimize sample-and-hold pedestal error |
| V+, V– | Analog power rails | Support ±5 V to ±20 V dual supplies or 10 V to 30 V single supply (V– = GND) |
| GND | Ground reference | Logic and analog common return; must be low-impedance for noise immunity |
| NC | No-connect | Pin 10 is internally unused - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance matching | ΔRDS(on) ≤ 4 Ω max - maintains channel-to-channel gain consistency in programmable-gain amplifiers |
| Single-supply capability | Operates from 12 V (V+ = 12 V, V– = GND) - eliminates need for negative rail in portable instrumentation |
| Latchup immunity | Epitaxial layer isolation - prevents destructive latchup under overvoltage transients per MIL-STD-883 |
| Low leakage current | IS(off), ID(off) ≤ ±0.01 nA max - preserves capacitor charge for >1 s hold time in precision S/H circuits |
| High off-isolation | OIRR ≥ 90 dB - isolates RF-sensitive analog paths from digital control lines in mixed-signal PCBs |
Applications
| Audio Switching | Data Acquisition |
|---|---|
Use Scenario: Routing line-level stereo signals between multiple codecs and amplifier stages in professional audio mixers. IC Role / Device Role / Timing Role: Quad SPST switch providing channel-selectable signal path with <0.01% THD+N at 1 kHz. Use Value: 45 Ω RDS(on) minimizes level mismatch between channels; low charge injection prevents pop/click artifacts during mute transitions. |
Use Scenario: Multiplexing 16-channel sensor inputs (thermocouples, strain gauges) into a shared 16-bit ADC in industrial PLC modules. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with <1 LSB gain error across channels. Use Value: ≤4 Ω RDS(on) matching ensures uniform channel gain; ±15 V range accommodates isolated sensor front-ends. |
| Sample-and-Hold Circuits | Medical Instrumentation |
Use Scenario: Capturing transient ECG waveforms in portable cardiac monitors using open-loop S/H topology. IC Role / Device Role / Timing Role: Drain-optimized switch minimizing charge injection to preserve microvolt-level signal integrity during hold phase. Use Value: –1 pC charge injection limits pedestal error to <0.5 mV on 10 nF hold capacitors - meeting AHA Class II accuracy requirements. |
Use Scenario: Isolating patient-connected EEG electrode inputs from digital processing circuitry in diagnostic neurology equipment. IC Role / Device Role / Timing Role: High-isolation analog gate preventing leakage currents >100 pA that could compromise patient safety standards. Use Value: ±0.01 nA off-leakage meets IEC 60601-1 creepage requirements; 90 dB off-isolation suppresses digital noise coupling into analog front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4618ESE+ | Higher RDS(on) (100 Ω typ.), no dual-supply support - requires 3 V to 16 V single supply only | Lower cost for battery-powered consumer audio; unsuitable for ±15 V industrial sensors | Select when operating from 3.3 V/5 V rails and RDS(on) >80 Ω is acceptable |
| ADG1412BRUZ | Lower RDS(on) (1.3 Ω typ.), higher supply voltage limit (±20 V), but 200 ns tON and 10× higher price | Better for high-precision test equipment requiring <0.1% gain error; over-spec for medical S/H | Select only when sub-2 Ω on-resistance and ±20 V range are mandatory design requirements |
Compared with MAX4618ESE+ and ADG1412BRUZ, DG442BDY delivers optimal balance of low on-resistance (45 Ω), fast switching (120 ns), and dual-supply flexibility (±15 V) at industrial-grade reliability - making it the preferred choice for cost-sensitive, high-fidelity data acquisition where moderate speed suffices.
Availability
DG442BDY is available at Aetrix Electronics and suitable for data acquisition systems, medical instrumentation, and audio signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG442BDY 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 core expertise in power MOSFETs, diodes, optoelectronics, and precision analog switches.
The DG442BDY belongs to Vishay's high-speed CMOS analog switch product line, engineered specifically for low-error signal routing in test equipment, medical devices, and industrial measurement systems where rail-to-rail analog performance and latchup immunity are critical.
FAQ
What is the logic polarity of DG442BDY compared to DG441BDY?
The DG442BDY uses inverted logic control: a logic low (≤0.8 V) turns switches ON, while a logic high (≥2.4 V) turns them OFF. This is the opposite of DG441BDY, which activates switches with logic high. This inversion is fixed per device family and cannot be reconfigured. Always verify control signal levels match DG442BDY's truth table before integration.
Can DG442BDY operate from a single 12 V supply?
Yes, DG442BDY supports single-supply operation with V+ = 12 V and V– = GND. In this configuration, the analog signal range is 0 V to 12 V, RDS(on) increases to 90 Ω typ., and tON remains 120 ns typ. The device retains full TTL/CMOS compatibility and low leakage performance, making it suitable for portable instrumentation where negative rails are impractical.
What is the maximum allowable analog input voltage beyond the supply rails for DG442BDY?
DG442BDY includes internal clamping diodes that conduct when analog signals exceed V+ or fall below V– by more than ~0.7 V. The absolute maximum rating allows signals from (V– – 2 V) to (V+ + 2 V), but continuous forward current through these diodes must be limited to 30 mA. For robust overvoltage protection, external series resistors are recommended to constrain diode current within safe limits.
How does DG442BDY achieve latchup immunity?
DG442BDY uses Vishay Siliconix's proprietary high-voltage silicon-gate process with an epitaxial layer that electrically isolates the CMOS switch structure from the substrate. This construction prevents parasitic SCR formation under transient overvoltage or ESD events, ensuring latchup-free operation per JEDEC JESD78 Class II requirements - critical for reliability in automated test equipment and medical systems.
Is DG442BDY pin-compatible with older DG442 variants like DG442DJ?
Yes, DG442BDY (SOIC-16) shares identical pinout and electrical specifications with DG442DJ (PDIP-16) and DG442BDN (QFN-16). All variants use the same functional block diagram, truth table, and timing characteristics. Mechanical differences exist only in package dimensions and thermal resistance - PCB layout must accommodate SOIC-16 footprint (3.9 × 9.9 mm, 1.27 mm pitch) for DG442BDY.
DG442BDY 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):
- 80Ohm
- Channel-to-Channel Matching (ΔRon):
- 2Ohm
- Voltage - Supply, Single (V+):
- 13V ~ 36V
- Voltage - Supply, Dual (V±):
- ±7V ~ 22V
- Switch Time (Ton, Toff) (Max):
- 220ns, 120ns
- -3db Bandwidth:
- -
- Charge Injection:
- -1pC
- Channel Capacitance (CS(off), CD(off)):
- 4pF, 4pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -95dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG442BDY FAQ
1.How can I place an order for DG442BDY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG442BDY 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 DG442BDY reliable?
The price and inventory of DG442BDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG442BDY is usually 5 days.
3.What payment methods are accepted for DG442BDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG442BDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG442BDY?
DG442BDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG442BDY 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 DG442BDY?
For technical support, including DG442BDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG442BDY requirements.
6.How does Aetrix verify that DG442BDY is sourced from the original manufacturer or authorized distributors?
All DG442BDY 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 DG442BDY meets industry standards.
7.What is the process for return or replacement of DG442BDY?
All DG442BDY units undergo pre-shipment inspection (PSI). If there is an issue with DG442BDY, 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 DG442BDY part is unused and in its original packaging.
Return procedure for DG442BDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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