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Vishay Siliconix DG9431DY-T1
- Part No.:
- DG9431DY-T1
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG9431DY-T1.pdf
- Description:
- IC SWITCH SPDT X 1 30OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
DG9431DY-T1 from Vishay Siliconix is a low-voltage single-pole/double-throw (SPDT) CMOS 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 delivers break-before-make switching for signal routing in portable battery-powered instrumentation.
For engineers reviewing the DG9431DY-T1 datasheet, DG9431DY-T1 pinout, DG9431DY-T1 application, or DG9431DY-T1 equivalent, key selection criteria include on-resistance matching, charge injection (1 pC), off-isolation (–74 dB), leakage current (±200 pA channel-on), and TSOP-6/SOIC-8 package compatibility for space-constrained designs.
Technical Context
The DG9431DY-T1 implements a monolithic CMOS SPDT switch architecture with epitaxial latchup protection and guaranteed break-before-make timing (3–10 ns). Its BCD-15 process enables low-voltage operation down to 2.7 V while maintaining rail-to-rail analog signal handling (0 to V+).
Control logic accepts TTL/CMOS-compatible inputs (logic "0" ≤ 0.8 V, logic "1" ≥ 2.4 V), and internal ESD protection exceeds 2000 V per Method 3015.7. All terminals support ±20 mA continuous current, with clamping diodes limiting signals exceeding V+ or GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7 V to +12 V - supports 3.3 V and 5 V systems with margin for transient spikes |
| rDS(on) @ 5 V | 20 Ω typ - ensures minimal signal attenuation and voltage drop in precision analog paths |
| tON / tOFF | 35 ns / 20 ns - enables high-speed multiplexing in data acquisition and communication interfaces |
| Charge Injection | 1 pC - reduces sampling error in sample-and-hold and ADC front-end circuits |
| ICOM(on) | ±200 pA max - maintains accuracy in high-impedance sensor signal chains |
| OIRR | –74 dB @ 1 MHz - provides strong channel-to-channel isolation in multi-signal routing |
| ESD Rating | >2000 V HBM - enhances robustness during board handling and system integration |
Pinout & Package
Package: 8-pin narrow-body SOIC (SOIC-8), 150 mil width, RoHS-compliant matte tin terminations (–E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Digital control input | Accepts TTL/CMOS logic; selects NO (logic 1) or NC (logic 0) path |
| 2 (NO) | Normally open switch terminal | Connects to COM when IN = logic high; carries bidirectional analog signals |
| 3 (NC) | Normally closed switch terminal | Connects to COM when IN = logic low; isolated from COM during NO conduction |
| 4 (GND) | Analog and digital ground reference | Common return for power, logic, and signal paths; must be low-impedance |
| 5 (COM) | Common analog terminal | Shared I/O node; routes signal to NO or NC based on IN state |
| 6 (V+) | Positive supply rail | Powers analog switch core and level-shifting circuitry; decoupling required |
| 7, 8 | No connect (NC) | Internally unconnected; left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Guaranteed 3–10 ns interval prevents momentary shorting between NO and NC paths |
| Rail-to-rail analog signal range | Supports 0 V to V+ signals without distortion-ideal for unipolar sensor and DAC outputs |
| Low on-resistance flatness | ≤6 Ω variation over 1–3 V COM voltage range-minimizes THD in audio and measurement paths |
| TSOP-6 and SOIC-8 dual packaging | Enables footprint reuse across portable (TSOP-6) and industrial (SOIC-8) designs |
| 100 % matte tin terminations | RoHS-compliant lead-free finish with proven solderability and intermetallic reliability |
Applications
| Battery-Powered Test Equipment | Cellular Phone Front-End |
|---|---|
Use Scenario: Signal routing in handheld multimeters and portable oscilloscope probes requiring low power and high accuracy. IC Role / Device Role / Timing Role: SPDT analog switch selecting between calibration references and DUT inputs under microcontroller control. Use Value: 20 Ω rDS(on) and 1 pC charge injection preserve measurement fidelity; 2.7 V operation extends battery life. | Use Scenario: Antenna switching and RF front-end signal path selection in GSM/WCDMA handsets. IC Role / Device Role / Timing Role: Low-leakage analog switch isolating transceiver paths during transmit/receive mode transitions. Use Value: ±200 pA channel-on leakage avoids DC offset in sensitive LNA inputs; –74 dB off-isolation suppresses crosstalk. |
| Sample-and-Hold Circuits | Military Radio Signal Conditioning |
Use Scenario: Acquiring analog sensor data in embedded data loggers with microsecond-level sampling windows. IC Role / Device Role / Timing Role: Precision switch connecting sensor output to hold capacitor with minimal charge kickback. Use Value: 1 pC charge injection limits aperture error; 35 ns tON enables ≥10 MSPS effective sampling rates. | Use Scenario: Configurable filtering and gain-path selection in ruggedized HF/VHF tactical radios operating across –40 °C to +85 °C. IC Role / Device Role / Timing Role: High-reliability analog switch enabling reconfigurable IF signal routing in harsh environments. Use Value: >2000 V HBM ESD rating withstands field handling; guaranteed break-before-make prevents signal corruption during mode switching. |
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) (45 Ω typ @ 5 V), slower tON (75 ns), no guaranteed break-before-make | Less suitable for precision sample-and-hold; acceptable for general-purpose multiplexing | Select when cost sensitivity outweighs speed and charge injection requirements |
| ADG719BRMZ | Lower leakage (±1 pA typ), but higher rDS(on) (3.5 Ω min only at V+ = 5.5 V), TSOT-23-6 only | Better for ultra-high-Z sensor interfaces; limited to smaller packages and tighter voltage range (1.8–5.5 V) | Select when sub-picoampere leakage is critical and SOIC-8 footprint is not required |
Compared with MAX4617ESA+ and ADG719BRMZ, the DG9431DY-T1 uniquely balances low on-resistance (20 Ω), fast switching (35 ns), guaranteed break-before-make, and SOIC-8 availability-making it optimal for portable test gear and military comms where timing integrity and board-space efficiency are jointly constrained.
Availability
DG9431DY-T1 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-T1 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 leader in discrete semiconductors and passive components, specializing in high-reliability, high-performance devices for demanding industrial, automotive, and defense applications.
The DG9431DY-T1 belongs to Vishay's low-voltage analog switch product line, engineered specifically for portable and battery-powered systems where low power, small size, and signal integrity are critical design constraints.
FAQ
What is the maximum analog signal voltage range supported by the DG9431DY-T1?
The DG9431DY-T1 supports rail-to-rail analog signals from 0 V to V+, where V+ ranges from +2.7 V to +12 V. At V+ = 5 V, the full analog range is 0 to 5 V. Internal clamping diodes limit signals exceeding V+ or GND to ±0.3 V beyond rails, requiring external current limiting if exceeded. This range makes DG9431DY-T1 suitable for unipolar sensor outputs and DAC interfaces in 3.3 V and 5 V systems.
Does the DG9431DY-T1 require external pull-up or pull-down resistors on its IN pin?
No, the DG9431DY-T1 does not require external pull-up or pull-down resistors on the IN pin. Its digital input is TTL/CMOS-compatible with defined thresholds: logic "0" ≤ 0.8 V and logic "1" ≥ 2.4 V at V+ = 3–5 V. The input leakage current is ≤1 µA across temperature, allowing direct connection to microcontroller GPIOs or logic gates without biasing. DG9431DY-T1 operates reliably with clean digital drive sources meeting these voltage levels.
Is the DG9431DY-T1 pin-compatible with the DG9431DV-T1 in TSOP-6 package?
No, the DG9431DY-T1 (SOIC-8) is not pin-compatible with the DG9431DV-T1 (TSOP-6). They share identical electrical functionality and truth table but differ in pin count, layout, and terminal mapping: DG9431DY-T1 uses pins 1–6 plus two NC pins (7,8), while DG9431DV-T1 uses only six pins in different physical order (IN, V+, GND, NO, COM, NC). PCB redesign is required when substituting between these packages. DG9431DY-T1 remains the SOIC-8 option for legacy layouts and higher-power thermal dissipation (400 mW vs. 300 mW).
What is the thermal performance of the DG9431DY-T1 in SOIC-8 package?
The DG9431DY-T1 in SOIC-8 has a power dissipation rating of 400 mW at ≤75 °C, with linear derating of 6.5 mW/°C above that temperature. At maximum ambient +85 °C, usable power drops to ~335 mW. Junction-to-ambient thermal resistance (θJA) is approximately 312.5 °C/W, calculated from 400 mW and 125 °C max junction temperature. For sustained operation near limits, DG9431DY-T1 benefits from copper pour and thermal vias under the exposed pad (if present) or adjacent GND traces to improve heat spreading.
How does the DG9431DY-T1 handle signal directionality and voltage polarity?
The DG9431DY-T1 is bidirectional: each switch conducts equally well in both directions when ON, and blocks up to the power supply level when OFF. It handles AC and DC signals symmetrically across COM–NO and COM–NC paths. No polarity restrictions apply-the device passes positive, negative, or bipolar signals within the 0 V to V+ range. However, signals exceeding V+ or GND activate internal clamping diodes, so external series resistance must limit forward current to ≤20 mA per Absolute Maximum Ratings. DG9431DY-T1 thus supports true analog multiplexing without signal inversion or polarity assumptions.
DG9431DY-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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-T1 FAQ
1.How can I place an order for DG9431DY-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG9431DY-T1 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-T1 reliable?
The price and inventory of DG9431DY-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG9431DY-T1 is usually 5 days.
3.What payment methods are accepted for DG9431DY-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG9431DY-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG9431DY-T1?
DG9431DY-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG9431DY-T1 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-T1?
For technical support, including DG9431DY-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG9431DY-T1 requirements.
6.How does Aetrix verify that DG9431DY-T1 is sourced from the original manufacturer or authorized distributors?
All DG9431DY-T1 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-T1 meets industry standards.
7.What is the process for return or replacement of DG9431DY-T1?
All DG9431DY-T1 units undergo pre-shipment inspection (PSI). If there is an issue with DG9431DY-T1, 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-T1 part is unused and in its original packaging.
Return procedure for DG9431DY-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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