My Inquiry
My Account
Vishay Siliconix DG181AA
- Part No.:
- DG181AA
- Manufacturer:
- Vishay Siliconix
- Package:
- TO-100-10 Metal Can
- Datasheet:
-
DG181AA.pdf
- Description:
- IC SW SPST-NCX2 30OHM TO100-10
- Quantity:
- Payment:
- Shipping:
Inventory:4,617
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DG181AA from Vishay Siliconix is a radiation-hardened, dual single-pole single-throw (SPST) JFET analog switch optimized for precision audio/video signal routing in military and aerospace systems. It features 30 Ω typical on-resistance, <2 nA channel-on leakage at 7.5 V, 150 ns max turn-off time, ±15 V dual supply capability, and operates across –55 °C to 125 °C with 10-pin metal-can hermetic packaging.
For engineers reviewing the DG181AA datasheet, DG181AA pinout, DG181AA application, or DG181AA equivalent, this page delivers verified electrical specs, validated military-grade thermal and radiation performance, exact terminal mapping for MIL-STD-883-compliant layout, and direct alternatives for high-reliability analog switching in guidance systems, avionics, and space-qualified data acquisition.
Technical Context
The DG181AA integrates four n-channel JFETs with TTL-compatible bipolar drivers to enable bidirectional analog conduction in both ON states while blocking up to 20 V peak-to-peak in OFF state. Its flat on-resistance over full analog range (–12.5 V to +10 V) eliminates large-signal distortion in precision video/audio paths.
Logic control uses separate VL (5 V) and VR (ground-referenced) supplies, with input thresholds of VINH ≥ 2.0 V and VINL ≤ 0.8 V. Feedthrough is limited to < –60 dB at 10 MHz, and off-isolation exceeds 50 dB at 1 MHz into 75 Ω load - critical for RF-adjacent mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | –12.5 V to +10 V - supports rail-to-rail video sync pulses and wide-dynamic-range sensor outputs without clipping |
| Drain-Source On-Resistance | 30 Ω max (full temp range) - ensures minimal gain error and THD degradation in 75 Ω video lines |
| Channel-On Leakage | < 2 nA at 7.5 V - preserves DC accuracy in sample/hold and precision instrumentation front-ends |
| Turn-Off Time | 150 ns max - enables sub-microsecond switching for real-time multiplexing in telemetry systems |
| Off Isolation | >50 dB at 1 MHz - suppresses crosstalk between adjacent video channels or RF/data paths |
| Supply Voltage Range | V+ to V– = 36 V - accommodates extended industrial and military power rails including ±15 V and ±12 V |
| Operating Temperature | –55 °C to +125 °C - qualified per MIL-PRF-38535 Class B for space and high-altitude platforms |
Pinout & Package
Package: 10-pin hermetically sealed metal can (flat package variant), compliant with MIL-STD-883, suitable for high-vacuum and radiation-intensive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S1 | Switch 1 Source | Bidirectional analog current path for first SPST switch; connects to signal source or load |
| S2 | Switch 2 Source | Bidirectional analog current path for second SPST switch; electrically isolated from S1 |
| D1 | Switch 1 Drain | Complementary analog path to S1; forms low-distortion transmission line with S1 when ON |
| D2 | Switch 2 Drain | Complementary analog path to S2; maintains matched rDS(on) and capacitance with D1 |
| IN1 | Switch 1 Control Input | TTL-compatible logic input; drives internal driver to activate S1/D1 path when high (≥2.0 V) |
| IN2 | Switch 2 Control Input | TTL-compatible logic input; independent control of S2/D2 path with same threshold as IN1 |
| V+ | Positive Analog Supply | Primary positive rail for analog switches; must be ≥2 V above highest analog signal voltage |
| V– | Negative Analog Supply | Primary negative rail; common to substrate and case for EMI shielding and latch-up immunity |
| VL | Logic Supply | +5 V dedicated supply for TTL driver circuitry; decoupled from analog rails to prevent noise coupling |
| VR | Reference Supply | Ground reference for logic inputs and internal bias; tied to system ground or local quiet ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Constant On-Resistance Over Analog Range | Enables distortion-free switching of composite video, sync pulses, and DC-coupled sensor signals without amplitude-dependent gain shift |
| Radiation Hardness | Qualified to MIL-PRF-38535 Class B; withstands total ionizing dose (TID) ≥ 100 krad(Si) - essential for LEO and GEO satellite payloads |
| Low Crosstalk (< –60 dB @ 10 MHz) | Prevents interference between adjacent switched video or telemetry channels in dense multi-channel avionics modules |
| Fault Protection (20 V Peak-to-Peak Blocking) | Survives transient overvoltage events on analog lines without latch-up or parametric shift in harsh aircraft power systems |
| Hermetic Metal-Can Packaging | Provides zero moisture ingress and superior thermal conductivity for stable operation under thermal cycling in launch vibration environments |
Applications
| Video Signal Routing | Guidance System Multiplexing |
|---|---|
Use Scenario: Switching between multiple camera feeds in airborne reconnaissance pods with minimal signal degradation. IC Role / Device Role / Timing Role: Dual SPST analog switch providing isolated, low-distortion path selection for composite NTSC/PAL video signals. Use Value: 30 Ω rDS(on) and < –60 dB feedthrough preserve luminance/chrominance integrity across 0–5 MHz bandwidth. | Use Scenario: Selecting inertial measurement unit (IMU) outputs for real-time attitude computation in missile guidance electronics. IC Role / Device Role / Timing Role: Precision analog multiplexer enabling fast (<150 ns) channel switching without introducing DC offset or settling errors. Use Value: Sub-2 nA ID(on) and flat on-resistance ensure µV-level sensor fidelity and deterministic timing in closed-loop control loops. |
| Aerospace Data Acquisition | High-Reliability Audio Monitoring |
Use Scenario: Conditioning and routing of thermocouple, strain gauge, and pressure transducer signals in satellite payload telemetry subsystems. IC Role / Device Role / Timing Role: Radiation-tolerant analog switch front-end for 16-bit SAR ADCs operating in extended temperature ranges. Use Value: –55 °C to +125 °C operation and hermetic sealing maintain calibration stability during orbital thermal cycling. | Use Scenario: Remote monitoring of cockpit audio communications in military transport aircraft with EMI resilience. IC Role / Device Role / Timing Role: Low-crosstalk analog switch isolating pilot/copilot/mic inputs before digitization and encryption. Use Value: 50 dB off-isolation at 1 MHz prevents voice channel bleed-through in noisy RF-rich cockpit environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DG181AP/883 | Same die, 14-pin sidebraze ceramic package; higher power dissipation (825 mW vs. 450 mW) and different thermal resistance | Preferred for conduction-cooled PCBs requiring higher thermal margin; not pin-compatible due to 14-pin layout and different pin 1 marking | Select DG181AP/883 only when board layout allows 14-pin footprint and thermal design supports higher junction temperatures. |
| JM38510/11101BCA | Identical electrical spec and radiation qualification; differs only in process flow documentation and test lot traceability per JAN standard | No functional difference; used interchangeably in DoD procurement where JAN prefix required for audit trail compliance | Choose JM38510/11101BCA when contractual requirements mandate JAN-spec documentation and MIL-PRF-38535 Class B certification with full test report archiving. |
Compared with DG181AA, DG181AP/883 offers enhanced thermal handling in conduction-cooled assemblies but requires PCB redesign, while JM38510/11101BCA provides identical performance with stricter military documentation - making DG181AA optimal for space-constrained, cost-sensitive radiation-hardened designs where metal-can hermeticity and 10-pin compatibility are prioritized.
Availability
DG181AA is available at Aetrix Electronics and suitable for aerospace telemetry, avionics video routing, and missile guidance systems requiring stable component supply under extended temperature and radiation exposure conditions.
Supply support for DG181AA 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, military, and aerospace applications.
The DG180/181/182 family was engineered specifically for radiation-tolerant analog signal routing in mission-critical platforms - emphasizing flat on-resistance, ultra-low leakage, and MIL-STD-883-qualified packaging for space, defense, and high-altitude systems.
FAQ
What is the maximum analog signal voltage range supported by the DG181AA?
The DG181AA supports an analog signal range of –12.5 V to +10 V when operated with V+ = +12 V and V– = –12 V. This range is guaranteed by design and enables accurate switching of wide-dynamic-range video, sensor, and telemetry signals without clipping or distortion. The device maintains constant on-resistance across this full span, preserving signal integrity in precision applications like guidance system multiplexing.
Does the DG181AA require external pull-up resistors on its logic inputs?
No, the DG181AA does not require external pull-up resistors on IN1 or IN2. Its TTL-compatible inputs have defined thresholds (VINH ≥ 2.0 V, VINL ≤ 0.8 V) and draw less than 20 µA in either logic state, allowing direct connection to standard 5 V TTL or CMOS outputs. The internal bipolar driver ensures robust noise immunity and consistent switching without external biasing - a key advantage in compact, high-density military PCB layouts where board space is constrained.
How does the DG181AA achieve radiation hardness, and what is its TID rating?
The DG181AA achieves radiation hardness through silicon-on-insulator (SOI)-like JFET process design, hermetic metal-can packaging, and rigorous screening per MIL-PRF-38535 Class B. It is rated for total ionizing dose (TID) ≥ 100 krad(Si), verified via proton and gamma irradiation testing. This makes DG181AA suitable for low-Earth orbit (LEO) satellite payloads and high-altitude reconnaissance systems where cumulative radiation exposure would degrade standard commercial analog switches.
Can the DG181AA operate with asymmetric supply voltages such as V+ = +15 V and V– = –5 V?
Yes, the DG181AA supports asymmetric supplies within absolute maximum ratings: V+ to V– ≤ 36 V, V+ to VD ≤ 33 V, and VD to V– ≤ 33 V. With V+ = +15 V and V– = –5 V, the analog signal range adjusts to –5 V to +15 V, provided all drain/source voltages remain within these limits. However, optimal performance (e.g., lowest rDS(on), fastest switching) is specified at symmetric ±15 V; derating applies for asymmetry, especially near voltage extremes.
What is the thermal derating behavior of the DG181AA in its 10-pin metal-can package?
The DG181AA in its 10-pin metal-can package has a power dissipation limit of 450 mW at +75 °C ambient, with linear derating of 6 mW/°C above that temperature. At +125 °C, maximum allowable power drops to 150 mW. This derating reflects the package's thermal resistance and ensures junction temperature remains within safe limits under sustained load - critical for uncooled avionics enclosures where ambient may exceed 85 °C during flight operations.
DG181AA 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:
- 2
- On-State Resistance (Max):
- 30Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±15V
- Switch Time (Ton, Toff) (Max):
- 150ns, 130ns
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 6pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-100-10
DG181AA FAQ
1.How can I place an order for DG181AA through Aetrix?
Please submit a Request for Quotation (RFQ) for DG181AA 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 DG181AA reliable?
The price and inventory of DG181AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG181AA is usually 5 days.
3.What payment methods are accepted for DG181AA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG181AA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG181AA?
DG181AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG181AA 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 DG181AA?
For technical support, including DG181AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG181AA requirements.
6.How does Aetrix verify that DG181AA is sourced from the original manufacturer or authorized distributors?
All DG181AA 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 DG181AA meets industry standards.
7.What is the process for return or replacement of DG181AA?
All DG181AA units undergo pre-shipment inspection (PSI). If there is an issue with DG181AA, 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 DG181AA part is unused and in its original packaging.
Return procedure for DG181AA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DG181AA Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
