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Vishay Siliconix DG9431DY
- Part No.:
- DG9431DY
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG9431DY.pdf
- Description:
- IC SWITCH SPDT X 1 30OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,326
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Product details
Overview
DG9431DY from Vishay Siliconix is a low-voltage single-pole/double-throw (SPDT) analog switch in SOIC-8 package, operating from +2.7 V to +5 V, with 20 Ω typical on-resistance at 5 V, 35 ns turn-on time, and 20 ns turn-off time. It enables high-fidelity signal routing in portable battery-powered systems where board space and power efficiency are critical.
For engineers reviewing the DG9431DY datasheet, DG9431DY pinout, DG9431DY application, or DG9431DY equivalent, key selection criteria include guaranteed break-before-make timing, sub-1 pC charge injection, <200 pA channel-on leakage, and TTL/CMOS-compatible digital control with 0.8 V/2.4 V logic thresholds.
Technical Context
The DG9431DY implements a monolithic CMOS SPDT switch architecture built on Vishay's BCD-15 process, supporting bidirectional analog signal conduction with rail-to-rail voltage handling up to V+. Its internal epitaxial layer prevents latchup, and ESD protection exceeds 2000 V per Method 3015.7.
Switching is controlled by a single digital input (IN) that selects between normally closed (NC) and normally open (NO) paths to common (COM), with logic "0" (≤0.8 V) connecting NC–COM and logic "1" (≥2.4 V) connecting NO–COM. Break-before-make timing is guaranteed at ≤10 ns over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7 V to +12 V - supports 3 V and 5 V logic domains while maintaining full analog signal range (0 to V+) |
| rDS(on) @ 5 V | 20 Ω typ - ensures minimal signal attenuation and distortion for audio, sensor, and precision analog signals |
| tON / tOFF | 35 ns / 20 ns @ 5 V - enables fast multiplexing in data acquisition and communication front-ends |
| Charge Injection | 1 pC max - limits voltage glitch on sampled nodes in sample-and-hold and ADC driver circuits |
| ICOM(on) | 200 pA max - preserves accuracy in high-impedance sensor interfaces and low-current measurement paths |
| OIRR | −74 dB @ 1 MHz - provides strong isolation between switched channels in RF-adjacent or mixed-signal routing |
| ESD Rating | >2000 V HBM - meets industrial handling requirements without external protection diodes |
Pinout & Package
DG9431DY is housed in an 8-pin narrow-body SOIC package (5.3 mm × 4.4 mm, 1.27 mm pitch), RoHS-compliant with matte tin terminations (-E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Digital Control Input | Accepts TTL/CMOS logic; selects NC–COM (low) or NO–COM (high); threshold 0.8 V / 2.4 V |
| 2 (NO) | Analog Output (Normally Open) | Connects to COM only when IN = high; rated for ±20 mA continuous current |
| 3 (NC) | Analog Output (Normally Closed) | Connects to COM only when IN = low; electrically identical to NO in on-resistance and leakage |
| 4 (GND) | Ground Reference | Return path for logic and analog circuitry; must be low-impedance for stable switching performance |
| 5 (COM) | Common Analog Terminal | Bidirectional signal path shared with NC and NO; handles full analog range (0 to V+) |
| 6 (V+) | Positive Supply Rail | Power source for analog and digital sections; decoupling capacitor required near pin |
| 7, 8 | No Connect (NC) | Internally unconnected; left floating or tied to GND per layout best practice; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Break-Before-Make | Ensures no momentary short between NC and NO during transition, preventing signal crosstalk in critical routing |
| Low On-Resistance Match (ΔrDS(on)) | ≤2 Ω max - maintains consistent gain and phase response when routing differential or matched signals |
| Sub-1 pC Charge Injection | Minimizes settling error in precision sampling applications, reducing need for post-switching correction |
| Rail-to-Rail Analog Signal Range | Supports 0 V to V+ signal swing - eliminates level-shifting overhead in single-supply systems |
| TSOP-6 and SOIC-8 Dual Packaging | Enables footprint flexibility: SOIC-8 (DG9431DY) for prototyping and higher-power layouts; TSOP-6 for space-constrained portable designs |
Applications
| Battery-Powered Test Equipment | Cellular Phone Front-End |
|---|---|
Use Scenario: Portable multimeter or signal generator using analog multiplexing to route calibration references and sensor inputs. IC Role / Device Role / Timing Role: SPDT signal selector enabling shared ADC input between multiple sensors or reference sources. Use Value: 20 Ω rDS(on) and 35 ns switching preserve measurement accuracy and update rate without added buffering. | Use Scenario: Antenna diversity switching or RF front-end signal path selection in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-distortion analog switch isolating transmit/receive paths or selecting between multiple antenna feeds. Use Value: −74 dB off-isolation at 1 MHz and <200 pA leakage prevent desensitization and DC offset drift in sensitive receive chains. |
| Sample-and-Hold Circuits | Military Radio Audio Routing |
Use Scenario: Precision data acquisition system capturing fast transient waveforms with minimal aperture error. IC Role / Device Role / Timing Role: Sample gate controlling connection between input signal and hold capacitor. Use Value: 1 pC charge injection limits voltage step on hold capacitor, reducing acquisition settling time and improving effective resolution. | Use Scenario: Secure voice radio requiring analog audio path switching between encryption modules, speaker/mic, and auxiliary I/O. IC Role / Device Role / Timing Role: Signal path manager routing unencrypted/encrypted audio streams under microcontroller control. Use Value: Guaranteed break-before-make and >2000 V ESD rating ensure reliable operation in rugged field environments with frequent cable hot-plugging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617ESA+ | Higher rDS(on) (35 Ω typ @ 5 V), slower tON (60 ns), but offers dual SPDT in same SOIC-8 footprint | Preferred for space-constrained dual-channel routing; less suitable for ultra-low-distortion single-path use | Select MAX4617ESA+ only if dual-switch integration outweighs on-resistance and speed penalties |
| ADG719BRMZ | Lower rDS(on) (2.5 Ω typ), but narrower supply range (1.8–5.5 V); no guaranteed break-before-make | Better for low-voltage precision instrumentation; unsuitable where NC/NO shorting risk must be eliminated | Choose ADG719BRMZ for sub-3 V systems demanding lowest on-resistance, not for safety-critical break-before-make |
Compared with MAX4617ESA+ and ADG719BRMZ, the DG9431DY delivers optimal balance of speed (35 ns), low on-resistance (20 Ω), guaranteed break-before-make, and robust 2.7–12 V operation-making it ideal for portable, battery-powered, and military-grade analog signal routing where reliability and signal fidelity are non-negotiable.
Availability
DG9431DY is available at Aetrix Electronics and suitable for battery-operated systems, portable test equipment, and sample-and-hold circuits requiring stable component supply across extended temperature ranges (−40 °C to +85 °C) and long production lifecycles.
Supply support for DG9431DY 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 leadership in MOSFETs, diodes, optoelectronics, and precision analog switches.
The DG9431DY belongs to Vishay's low-voltage analog switch product line, engineered specifically for high-speed, low-distortion signal routing in portable, battery-powered, and ruggedized electronic systems.
FAQ
What is the maximum analog signal voltage range supported by the DG9431DY?
The DG9431DY supports a full rail-to-rail analog signal range from 0 V to V+, where V+ can be set between +2.7 V and +12 V. At V+ = 5 V, the device passes signals from 0 V to 5 V without clipping or distortion. This capability eliminates the need for external level-shifting circuitry in single-supply systems and simplifies design of portable instrumentation and communication interfaces. The DG9431DY maintains this range across its full operating temperature span (−40 °C to +85 °C).
Does the DG9431DY require external pull-up or pull-down resistors on the IN pin?
No, the DG9431DY does not require external pull-up or pull-down resistors on the IN pin. Its digital input is TTL/CMOS-compatible with defined logic thresholds: logic low ≤ 0.8 V and logic high ≥ 2.4 V over the full supply range. The input leakage current is ≤1 µA, allowing direct connection to microcontroller GPIOs or logic gates. This simplifies PCB layout and reduces bill-of-materials cost. The DG9431DY operates reliably without biasing components under standard digital drive conditions.
Is the DG9431DY pin-compatible with other Vishay analog switches in SOIC-8?
No, the DG9431DY is not pin-compatible with other Vishay SOIC-8 analog switches such as the DG9432 or DG9433. Its pinout is unique: Pin 1 = IN, Pin 2 = NO, Pin 3 = NC, Pin 4 = GND, Pin 5 = COM, Pin 6 = V+, Pins 7–8 = NC. Substituting another part without verifying pin mapping risks incorrect signal routing or damage. Always consult the specific datasheet for each variant. The DG9431DY pin configuration is fixed and validated only for its own functional block diagram.
What is the thermal derating behavior of the DG9431DY above 75 °C?
The DG9431DY requires thermal derating above +75 °C at 6.5 mW/°C, as specified in the Absolute Maximum Ratings table. Its SOIC-8 package has a power dissipation limit of 400 mW at ≤75 °C. Above that junction temperature, allowable power drops linearly - e.g., at 100 °C, maximum dissipation is reduced to 237.5 mW. This derating ensures long-term reliability and prevents thermal runaway. Designers must calculate worst-case power (I²×rDS(on) + V+×I+) and verify junction temperature remains within limits. The DG9431DY datasheet provides full thermal resistance and derating guidance.
Can the DG9431DY be used in bidirectional analog signal paths?
Yes, the DG9431DY supports fully bidirectional analog signal conduction when enabled - meaning signals pass equally well from COM to NO/NC or from NO/NC to COM. Its CMOS architecture ensures symmetrical on-resistance and capacitance regardless of signal direction. This makes the DG9431DY suitable for applications like audio line switching, sensor excitation feedback loops, and bus-sharing architectures. No polarity constraints apply, and the device maintains its 20 Ω rDS(on) and 32 pF CD(on) specifications in either direction. The DG9431DY's bidirectional capability is explicitly confirmed in its official description and functional testing.
DG9431DY 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):
- 30Ohm
- Channel-to-Channel Matching (ΔRon):
- 400mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 75ns, 50ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 7pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DG9431DY FAQ
1.How can I place an order for DG9431DY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG9431DY 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 DG9431DY reliable?
The price and inventory of DG9431DY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG9431DY is usually 5 days.
3.What payment methods are accepted for DG9431DY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG9431DY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG9431DY?
DG9431DY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG9431DY 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 DG9431DY?
For technical support, including DG9431DY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG9431DY requirements.
6.How does Aetrix verify that DG9431DY is sourced from the original manufacturer or authorized distributors?
All DG9431DY 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 DG9431DY meets industry standards.
7.What is the process for return or replacement of DG9431DY?
All DG9431DY units undergo pre-shipment inspection (PSI). If there is an issue with DG9431DY, 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 DG9431DY part is unused and in its original packaging.
Return procedure for DG9431DY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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