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Vishay Siliconix DG309BDY
- Part No.:
- DG309BDY
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG309BDY.pdf
- Description:
- IC SWITCH SPST-NCX4 85OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
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Product details
Overview
DG309BDY from Vishay Siliconix is a quad single-pole single-throw (SPST) analog switch with normally closed (NC) configuration, rated for ±22 V dual-supply operation and featuring 45 Ω typical on-resistance, <200 ns turn-on time, and 1 pC charge injection. It serves as a precision signal routing device in sample-and-hold circuits, programmable gain amplifiers, and low-distortion instrumentation front-ends.
For engineers reviewing the DG309BDY datasheet, DG309BDY pinout, DG309BDY application, or DG309BDY equivalent, key selection criteria include guaranteed ±22 V analog signal range, sub-200 ns switching speed, bi-directional signal handling, and TSSOP-16 package compatibility with space-constrained industrial and test equipment designs.
Technical Context
The DG309BDY implements four independent NC switches fabricated in Vishay's silicon gate CMOS process, enabling true bi-directional conduction when on and blocking to supply rails when off. Its internal epitaxial layer prevents latchup, and its charge injection compensation minimizes transients during switching.
Logic interface thresholds are fixed at VINH ≥ 11 V and VINL ≤ 3.5 V for robust noise immunity across -40 °C to +85 °C operation. The device supports both dual-supply (±4 V to ±22 V) and single-supply (4 V to 44 V) configurations, with leakage currents specified down to ±20 pA at room temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V (guaranteed full-range operation with ±15 V supplies) |
| On-Resistance (RDS(on)) | 45 Ω typical - enables <0.1% gain error in 10 kΩ impedance paths |
| Charge Injection | 1 pC - limits voltage glitch to <1 mV on 1 nF hold capacitors |
| Turn-On Time (tON) | <200 ns - supports >1 MHz sampling in data acquisition systems |
| Off-Leakage Current | ±20 pA max - preserves microvolt-level signal integrity over seconds |
| Supply Voltage Range | ±4 V to ±22 V - accommodates wide dynamic range sensor interfaces |
| Off-Isolation (OIRR) | 90 dB at 100 kHz - suppresses crosstalk between adjacent channels |
Pinout & Package
Package: 16-pin TSSOP (JEDEC MO-153, Vishay Doc #74417), 5.0 mm × 6.4 mm body, 0.65 mm pitch, lead-free (RoHS-compliant per -E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | D1–D4 (Drain) | Analog outputs - connect to load or downstream circuitry; bi-directional |
| 5, 6, 7, 8 | S1–S4 (Source) | Analog inputs - accept ±22 V signals; internally tied to NC path when logic low |
| 9 | GND | Logic reference and substrate tie - must be connected to system ground |
| 10 | V− | Negative supply rail - sets lower bound of analog signal range |
| 11, 12, 13, 14 | IN1–IN4 (Control) | CMOS-compatible digital inputs - high (≥11 V) opens switch, low (≤3.5 V) closes it |
| 15 | V+ | Positive supply rail - sets upper bound of analog signal range |
| 16 | NC | No connect - left unconnected per datasheet; no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| Normally closed (NC) topology | Ensures default signal continuity during power loss or control failure |
| ±22 V supply rating | Supports direct interfacing with high-voltage sensors and industrial transducers |
| 1 pC charge injection | Minimizes hold-step error in precision sample-and-hold applications |
| Bi-directional analog path | Enables flexible signal routing without polarity constraints in AC-coupled systems |
| Latchup-immune epitaxial process | Guarantees robust operation under transient overvoltage and ESD stress |
Applications
| Industrial Instrumentation | Test Equipment |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs into a shared ADC front-end. IC Role / Device Role / Timing Role: DG309BDY acts as a low-leakage, low-glitch analog multiplexer with NC default for fail-safe channel selection. Use Value: 20 pA max off-leakage preserves µV-level sensor resolution; 45 Ω RDS(on) ensures minimal gain error across 100 Ω–10 kΩ source impedances. | Use Scenario: Configuring programmable gain stages in automated test equipment (ATE) signal sources. IC Role / Device Role / Timing Role: DG309BDY provides digitally controlled feedback network switching in precision op-amp circuits. Use Value: <200 ns tON enables fast gain reconfiguration (<500 ns total settling); 90 dB off-isolation prevents inter-channel crosstalk during parallel testing. |
| Sample-and-Hold Circuits | Communications Systems |
Use Scenario: Capturing fast analog waveforms in oscilloscope input stages or RF demodulator IF chains. IC Role / Device Role / Timing Role: DG309BDY serves as the hold switch in a switched-capacitor topology with active discharge control. Use Value: 1 pC charge injection limits aperture error to <1 mV on 1 nF hold capacitors; NC state maintains hold path integrity during control latency. | Use Scenario: Routing differential analog signals in baseband filtering and modulation/demodulation paths. IC Role / Device Role / Timing Role: DG309BDY functions as a low-distortion signal path selector in multi-standard radio front-ends. Use Value: ±22 V rating accommodates wide-dynamic-range IF signals; 95 dB crosstalk rejection isolates adjacent channel paths in dense PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4674ETE+ | Single-supply only (1.8 V to 36 V), 60 Ω RDS(on), 2.5 pC charge injection | Lacks ±22 V dual-supply capability; optimized for battery-powered portable instruments | Select when single-rail operation and ultra-low quiescent current (1 µA) are prioritized over bipolar signal range |
| ADG1409BRUZ | Quad SPDT, 4.7 Ω RDS(on), 12 pC charge injection, ±15 V rating | SPDT architecture adds flexibility but increases complexity and cost; higher RDS(on) mismatch affects precision ratio-metric designs | Choose for bidirectional signal routing requiring make-before-break or break-before-make sequencing |
Compared with DG309BDY, MAX4674ETE+ offers lower supply voltage support but cannot handle ±22 V signals, while ADG1409BRUZ provides lower on-resistance and SPDT functionality at the expense of higher charge injection and reduced voltage margin-making DG309BDY optimal for high-voltage NC-switching where precision and fail-safe behavior are critical.
Availability
DG309BDY is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and precision sample-and-hold circuits requiring stable component supply and long-term obsolescence management.
Supply support for DG309BDY 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 DG309B series belongs to Vishay's improved analog switch product line, designed specifically for high-voltage, low-leakage, low-glitch signal routing in industrial, test, and instrumentation applications demanding reliability across extended temperature ranges.
FAQ
What is the maximum analog signal voltage the DG309BDY can switch?
The DG309BDY supports analog signals from V− to V+, with absolute maximum ratings allowing up to ±22 V across the supply rails. When operated with ±15 V supplies, it guarantees full ±15 V analog signal range per channel, enabling direct interfacing with high-output industrial sensors and transducers without external level-shifting circuitry. This specification is confirmed in the Absolute Maximum Ratings and Specification tables of Vishay Document #70047.
Does the DG309BDY require dual supplies, or can it operate from a single supply?
The DG309BDY supports both dual-supply (±4 V to ±22 V) and single-supply (4 V to 44 V) operation, as verified in the "SPECIFICATIONS (for Single Supply)" section of the datasheet. In single-supply mode with V+ = 12 V and V− = 0 V, it delivers 0 V to 12 V analog signal range and maintains functional logic thresholds (VINH ≥ 11 V, VINL ≤ 3.5 V). DG309BDY retains all core performance metrics-including on-resistance and leakage-within datasheet limits under either configuration.
What is the function of Pin 16 (NC) on the DG309BDY?
Pin 16 on the DG309BDY is designated NC (No Connect) and has no internal electrical connection, as explicitly stated in the Functional Block Diagram and Pin Configuration diagram of Vishay Document #70047. It must remain unconnected on the PCB; soldering or routing to this pin may compromise thermal performance or introduce parasitic coupling. This NC designation is consistent across all package variants (SOIC, TSSOP, DIP) of the DG309B family.
How does the DG309BDY differ from the DG308BDY in pinout and function?
The DG309BDY and DG308BDY share identical pinouts and package footprints but differ in switch logic: DG309BDY is normally closed (NC), conducting when control inputs are logic low, whereas DG308BDY is normally open (NO), conducting only when control inputs are logic high. This functional difference is confirmed in the Truth Table and DESCRIPTION section of Document #70047. Both devices use the same 16-pin TSSOP layout, enabling direct PCB replacement where fail-safe closure is required.
Is the DG309BDY RoHS compliant, and what does the -E3 suffix indicate?
Yes, the DG309BDY-T1-E3 variant is RoHS compliant, with the -E3 suffix denoting lead-free terminations per JEDEC J-STD-609. Vishay documentation confirms exemption from Pb-containing finishes, and the -E3 marking appears in the Ordering Information table of Document #70047 for all TSSOP-packaged DG309B parts. Standard DG309BDY (without -E3) uses leaded terminations and is not RoHS compliant unless otherwise specified.
DG309BDY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.7Ohm
- Voltage - Supply, Single (V+):
- 4V ~ 44V
- Voltage - Supply, Dual (V±):
- ±4V ~ 22V
- Switch Time (Ton, Toff) (Max):
- 200ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF, 5pF
- 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
DG309BDY FAQ
1.How can I place an order for DG309BDY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG309BDY 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 DG309BDY reliable?
The price and inventory of DG309BDY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG309BDY is usually 5 days.
3.What payment methods are accepted for DG309BDY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG309BDY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG309BDY?
DG309BDY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG309BDY 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 DG309BDY?
For technical support, including DG309BDY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG309BDY requirements.
6.How does Aetrix verify that DG309BDY is sourced from the original manufacturer or authorized distributors?
All DG309BDY 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 DG309BDY meets industry standards.
7.What is the process for return or replacement of DG309BDY?
All DG309BDY units undergo pre-shipment inspection (PSI). If there is an issue with DG309BDY, 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 DG309BDY part is unused and in its original packaging.
Return procedure for DG309BDY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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