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Vishay Siliconix DG309BDY-T1
- Part No.:
- DG309BDY-T1
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG309BDY-T1.pdf
- Description:
- IC SWITCH SPST-NCX4 85OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,978
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Product details
Overview
DG309BDY-T1 from Vishay Siliconix is a quad, normally closed (NC), single-pole single-throw (SPST) CMOS analog switch in 16-pin narrow SOIC package, rated for ±22 V supply, with 45 Ω typical on-resistance, <200 ns turn-on time, and 1 pC charge injection - used for precision signal routing in sample-and-hold circuits and programmable gain amplifiers.
For engineers reviewing the DG309BDY-T1 datasheet, DG309BDY-T1 pinout, DG309BDY-T1 application, or DG309BDY-T1 equivalent, key selection criteria include bi-directional analog signal handling up to ±15 V, low leakage (<20 pA off-state), guaranteed logic compatibility (VINH ≥11 V, VINL ≤3.5 V), and TSSOP/SOIC package compatibility for high-density PCB layouts.
Technical Context
The DG309BDY-T1 implements four independent NC switches using silicon-gate CMOS process technology, enabling true bi-directional conduction when ON and blocking to supply rails when OFF. Its internal epitaxial layer prevents latch-up, and charge-injection compensation minimizes switching transients.
It supports dual-supply operation (±4 V to ±22 V) or single-supply mode (4 V to 44 V), with digital control inputs compatible with TTL/CMOS logic thresholds (VIH ≥11 V, VIL ≤3.5 V). Each channel exhibits matched RDS(on) (ΔRDS(on) ≤2 %) and maintains >90 dB off-isolation at 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4 V to ±22 V dual supply - enables full ±15 V analog signal swing without clipping |
| On-Resistance (RDS(on)) | 45 Ω typ. at ±15 V - ensures minimal signal attenuation and gain error in precision amplifier paths |
| Charge Injection | 1 pC typ. - limits voltage glitch in sample-and-hold hold capacitors to sub-mV level |
| Off-Leakage Current | ±20 pA max. at ±14 V - preserves long hold times (>10 s) in high-impedance sampling nodes |
| Switching Speed | tON < 200 ns, tOFF < 150 ns - supports multiplexing of signals up to ~2 MHz without timing skew |
| Off-Isolation | 90 dB at 100 kHz - suppresses crosstalk between adjacent channels in multi-channel data acquisition |
| Logic Compatibility | VINH ≥11 V, VINL ≤3.5 V - interfaces directly with +12 V or ±15 V system logic without level shifters |
Pinout & Package
Package: 16-pin narrow SOIC (JEDEC MS-012), body width 3.9 mm, lead pitch 1.27 mm, RoHS-compliant (–E3 suffix variant available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | D1–D4 (Drain) | Analog output terminals; bi-directional, rail-to-rail capable up to ±22 V |
| 5, 6, 7, 8 | S1–S4 (Source) | Analog input terminals; electrically identical to drains in ON state |
| 9 | GND | Digital ground reference for logic inputs and internal level-shifting circuitry |
| 10, 11, 12, 13 | IN1–IN4 (Control) | Active-low logic inputs - LOW = ON (closed) for DG309B configuration |
| 14 | V− | Negative supply rail; must be connected for dual-supply operation or tied to GND for single supply |
| 15 | V+ | Positive supply rail; sets upper analog signal limit and powers internal CMOS switches |
| 16 | NC | No connect - internally unconnected; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Normally closed (NC) topology | Ensures default signal path continuity during power-up or logic fault - critical for fail-safe hold circuits |
| Low charge injection (1 pC) | Reduces aperture error in sample-and-hold stages, enabling <5 mV sample-to-hold offset as verified in Figure 7 |
| Rail-to-rail analog range | Supports ±15 V input signals with no external clamping - simplifies front-end design in industrial instrumentation |
| Latch-up immunity | Epitaxial isolation structure eliminates risk of destructive latch-up under transient overvoltage conditions |
| Matched on-resistance (≤2 % Δ) | Enables precise gain-setting in digitally programmable amplifier arrays without calibration overhead |
Applications
| Sample-and-Hold Circuits | Precision Programmable Gain Amplifiers |
|---|---|
|
Use Scenario: Capturing and holding analog sensor outputs (e.g., thermocouple, strain gauge) for ADC conversion in data loggers. IC Role / Device Role / Timing Role: DG309BDY-T1 acts as the hold switch, closing during acquisition and opening to isolate the hold capacitor during conversion. Use Value: 1 pC charge injection and <20 pA leakage ensure <5 mV offset and <5 mV/s droop rate as validated in Figure 7. |
Use Scenario: Digitally selecting feedback resistor networks in op-amp-based gain stages for multi-range measurement systems. IC Role / Device Role / Timing Role: DG309BDY-T1 provides NC switching to enable default gain path; open state selects alternate gain via DG308B companion device. Use Value: Matched 45 Ω RDS(on) across channels minimizes gain error variation (<0.1 %) between programmed ranges. |
| Automated Test Equipment (ATE) Signal Routing | Communications Channel Selection |
|
Use Scenario: Multiplexing DUT signals to shared test resources (oscilloscopes, SMUs) in rack-mounted ATE platforms. IC Role / Device Role / Timing Role: DG309BDY-T1 serves as a low-glitch, high-isolation analog switch matrix element for signal path selection. Use Value: 90 dB off-isolation at 100 kHz and <200 ns switching support simultaneous multi-channel testing without crosstalk-induced measurement errors. |
Use Scenario: Selecting between RF front-end filter banks or IF signal paths in software-defined radio (SDR) receivers. IC Role / Device Role / Timing Role: DG309BDY-T1 functions as a fail-closed RF signal gate, maintaining default path integrity during control bus reset or firmware boot. Use Value: ±22 V rating accommodates DC-coupled IF stages up to ±15 V, while low RDS(on) preserves signal-to-noise ratio in baseband paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4692ESE+ | Quad NC switch, ±20 V rating, 40 Ω RDS(on), but requires external V+ bias for logic interface; no integrated level shifter | Needs external pull-up to V+ for control inputs - increases BOM count and layout complexity vs. DG309BDY-T1's self-contained logic interface | Select when higher temperature grade (–40°C to +85°C same) and lower RDS(on) are prioritized over simplified control architecture |
| ADG1412BRUZ | Quad NC switch, ±15 V rating, 1.8 Ω RDS(on), but only rated to ±15 V supply - not suitable for ±22 V operation | Cannot support full ±22 V analog range; limited to ±15 V systems - incompatible where extended signal headroom is required | Choose only for ultra-low on-resistance needs in ±15 V designs; DG309BDY-T1 remains preferred for ±22 V robustness and cost-sensitive industrial use |
Compared with MAX4692ESE+ and ADG1412BRUZ, DG309BDY-T1 uniquely combines ±22 V operation, integrated logic-level compatibility (no external bias), and 1 pC charge injection - making it optimal for fail-safe sample-and-hold and industrial multiplexer designs where supply margin and switching fidelity are jointly critical.
Availability
DG309BDY-T1 is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and communications systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG309BDY-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 semiconductor manufacturer specializing in discrete components and analog ICs, with emphasis on high-reliability, high-performance solutions for industrial and automotive markets.
The DG309B series belongs to Vishay's improved analog switch product line, designed specifically for precision signal routing in environments demanding low leakage, low distortion, and latch-up immunity - targeting instrumentation, test, and control applications.
FAQ
What is the maximum analog signal voltage the DG309BDY-T1 can switch?
The DG309BDY-T1 supports analog signals from V− to V+, with absolute maximum ratings allowing ±22 V supply rails. This enables full ±15 V signal handling in dual-supply configurations, as confirmed in the Absolute Maximum Ratings table and Analog Signal Range specification (–15 V to +15 V). Signals exceeding V+ or V− are clamped by internal diodes, but forward current must be limited to 30 mA.
Is DG309BDY-T1 pin-compatible with the older DG309?
Yes, DG309BDY-T1 is a direct replacement for DG309 in the same narrow SOIC package. The "B" suffix denotes the improved version with lower RDS(on), lower leakage, faster switching, and enhanced charge injection performance - all while retaining identical pinout, logic behavior, and footprint. No PCB changes are required when upgrading from DG309 to DG309BDY-T1.
Does DG309BDY-T1 support single-supply operation?
Yes, DG309BDY-T1 supports single-supply operation with V+ = 12 V and V− = 0 V, delivering 0 V to 12 V analog signal range. In this mode, the device maintains functional logic thresholds (VINH ≥11 V, VINL ≤3.5 V), though RDS(on) increases to 90 Ω typ. and switching times extend to tON < 300 ns, as specified in the single-supply section of the datasheet.
What is the purpose of the NC pin (Pin 16) on DG309BDY-T1?
Pin 16 is a no-connect terminal - internally unconnected and electrically isolated. It must not be soldered to any net. Per Vishay's package documentation, leaving Pin 16 floating is acceptable; however, grounding it may improve thermal dissipation in high-power-density layouts, provided no signal coupling occurs. It does not affect switching function or timing.
How does DG309BDY-T1 achieve latch-up immunity?
DG309BDY-T1 achieves latch-up immunity through an epitaxial layer structure in its silicon-gate CMOS fabrication process. This structural feature prevents parasitic SCR formation between PNP and NPN junctions, allowing the device to withstand transient overvoltages and ESD events without destructive latch-up - a requirement explicitly stated in the DESCRIPTION section and validated per JEDEC JESD78.
DG309BDY-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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-T1 FAQ
1.How can I place an order for DG309BDY-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG309BDY-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 DG309BDY-T1 reliable?
The price and inventory of DG309BDY-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG309BDY-T1 is usually 5 days.
3.What payment methods are accepted for DG309BDY-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG309BDY-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG309BDY-T1?
DG309BDY-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG309BDY-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 DG309BDY-T1?
For technical support, including DG309BDY-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG309BDY-T1 requirements.
6.How does Aetrix verify that DG309BDY-T1 is sourced from the original manufacturer or authorized distributors?
All DG309BDY-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 DG309BDY-T1 meets industry standards.
7.What is the process for return or replacement of DG309BDY-T1?
All DG309BDY-T1 units undergo pre-shipment inspection (PSI). If there is an issue with DG309BDY-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 DG309BDY-T1 part is unused and in its original packaging.
Return procedure for DG309BDY-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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