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Vishay Siliconix DG642DJ
- Part No.:
- DG642DJ
- Manufacturer:
- Vishay Siliconix
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
DG642DJ.pdf
- Description:
- IC SWITCH SPDT X 1 8OHM 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,447
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Product details
Overview
DG642DJ from Vishay Siliconix is a single-pole double-throw (SPDT) analog switch optimized for wideband video and RF signal routing. It delivers 5 Ω typical on-resistance, 500 MHz bandwidth, -85 dB crosstalk at 5 MHz, 100 mA continuous current handling, and TTL-compatible digital control - enabling high-fidelity RGB switching in broadcast-grade video systems.
For engineers reviewing the DG642DJ datasheet, DG642DJ pinout, DG642DJ application, or DG642DJ equivalent, key selection criteria include bidirectional signal integrity up to ±5 V analog swing, fast 60 ns turn-on time, low 40 pF on-state capacitance, and compatibility with dual-supply (±3 V to ±15 V) or single-supply (V− = GND) configurations.
Technical Context
The DG642DJ uses Vishay's proprietary D/CMOS process to achieve simultaneous low RDS(on), high bandwidth, and TTL-level logic interface without external level-shifting. Its epitaxial layer prevents latchup, and source/drain terminals are fully interchangeable for flexible PCB layout.
It operates over -40 °C to +85 °C with supply rails from V+ = +5 V to +15 V and V− = -15 V to GND. Analog signals are clamped by internal diodes if exceeding V+ or V−, requiring external current limiting per datasheet Note a.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 500 MHz - supports full HD video (1080p60) and UHF RF routing without attenuation |
| RDS(on) | 5 Ω typ - minimizes insertion loss and distortion in 75 Ω video paths |
| Crosstalk | -85 dB at 5 MHz - ensures channel isolation critical for multi-source RGB/YPbPr switching |
| Switching Time | tON = 60 ns typ - enables sub-microsecond video frame synchronization |
| Analog Range | ±5 V (V− = -5 V, V+ = +12 V) - accommodates bipolar video signals without AC coupling |
| Supply Flexibility | Single- or dual-supply operation - simplifies power design in mixed-signal embedded systems |
| Current Rating | 100 mA continuous per S/D terminal - supports driving coax-coupled loads and active video buffers |
Pinout & Package
Package: 8-pin plastic DIP (JEDEC MS-012), 9.80–10.00 mm × 3.80–4.00 mm footprint, 0.101 mm gage plane, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D2) | Drain 2 / Switch Output 2 | Bidirectional analog output path for SPDT second throw; interchangeable with S2 |
| 2 (GND) | Ground Reference | Logic ground reference for TTL inputs; must be decoupled with 10 µF + 0.1 µF capacitors |
| 3 (S2) | Source 2 / Switch Input 2 | Bidirectional analog input path for SPDT second pole; interchangeable with D2 |
| 4 (S1) | Source 1 / Switch Input 1 | Bidirectional analog input path for SPDT first pole; interchangeable with D1 |
| 5 (IN) | Digital Control Input | TTL-compatible logic input (0.8 V low / 2.4 V high); controls SPDT state (0 = S1→D1, 1 = S2→D2) |
| 6 (D1) | Drain 1 / Switch Output 1 | Bidirectional analog output path for SPDT first throw; interchangeable with S1 |
| 7 (V+) | Positive Supply Rail | Accepts +5 V to +15 V; powers analog channel and internal regulator for TTL compatibility |
| 8 (V−) | Negative Supply Rail | Accepts -15 V to GND; enables bipolar analog signal handling and reduces on-capacitance |
Key Features
| Feature | Design Value |
|---|---|
| True bidirectional switching | Source and drain terminals electrically identical - eliminates routing constraints in differential or AC-coupled paths |
| On-chip voltage regulator | Maintains TTL logic thresholds across full V+ range (5–15 V) - removes need for external level shifters |
| Low charge injection | -40 pC - prevents vertical sync glitches in composite video and reduces DAC output step errors |
| High off-isolation | -63 dB at 5 MHz - suppresses leakage between active and inactive video sources during switching |
| Latchup immunity | Epitaxial layer construction - guarantees robust operation under transient overvoltage or ESD stress |
Applications
| RGB Video Multiplexer | RF Signal Selector |
|---|---|
Use Scenario: Selecting between three HDMI source outputs (PC, game console, media player) into a single display controller with minimal color skew. IC Role / Device Role / Timing Role: DG642DJ acts as the final-stage analog switch before the display's video ADC, routing red, green, and blue channels synchronously via parallel control lines. Use Value: 5 Ω RDS(on) and 500 MHz bandwidth preserve gamma accuracy and pixel clock integrity up to 165 MHz TMDS rates. | Use Scenario: Switching between two antenna feeds (GPS L1 and GLONASS G1) into a shared RF front-end in a dual-band navigation module. IC Role / Device Role / Timing Role: DG642DJ serves as a low-loss RF path selector, controlled by MCU GPIO, with V− tied to GND for single-supply operation. Use Value: -85 dB crosstalk prevents inter-band interference, while 40 pF CS(on) maintains impedance match to 50 Ω traces. |
| ATE Test Channel Router | Programmable Video Filter Bank |
Use Scenario: Routing DUT analog outputs to multiple measurement instruments (oscilloscope, spectrum analyzer, digitizer) in automated test equipment. IC Role / Device Role / Timing Role: DG642DJ functions as a reconfigurable signal path element in a matrix of switches, enabling non-blocking test resource allocation. Use Value: 100 mA current rating supports direct connection to instrument inputs without buffering; fast tON/tOFF enables <1 µs test sequence transitions. | Use Scenario: Selecting among four different RC filter cutoff frequencies in a real-time video enhancement ASIC evaluation board. IC Role / Device Role / Timing Role: DG642DJ connects discrete capacitor banks to a common op-amp integrator node, controlled by FPGA logic for dynamic bandwidth adjustment. Use Value: Low RDS(on) avoids filter Q-factor degradation; negligible charge injection prevents DC offset shifts during filter reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4682EUA+ | Higher RDS(on) (12 Ω typ), lower bandwidth (350 MHz), no negative supply support | Restricted to single-supply 3.3 V/5 V systems; unsuitable for ±5 V video swing | Choose when only 3.3 V logic and moderate bandwidth are required, and cost is prioritized over signal fidelity |
| ADG774ARZ | Lower bandwidth (200 MHz), higher crosstalk (-65 dB), but CMOS-only process yields lower leakage (<1 nA) | Better for low-power portable instrumentation; inadequate for HD video timing budgets | Prefer for battery-powered test gear where ultra-low standby current outweighs video performance needs |
Compared with MAX4682EUA+ and ADG774ARZ, the DG642DJ uniquely balances 500 MHz bandwidth, ±5 V analog capability, and TTL compatibility - making it the only option among the three qualified for broadcast video routing and high-speed RF multiplexing.
Availability
DG642DJ is available at Aetrix Electronics and suitable for RGB video multiplexing, RF signal selection, and ATE channel routing requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for DG642DJ 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 analog switching, power management, and precision sensing solutions.
The DG642DJ belongs to the DG64x family of wideband analog switches, engineered specifically for high-fidelity video, radar, satellite, and communications infrastructure where signal integrity, speed, and supply flexibility are non-negotiable.
FAQ
What is the maximum analog signal voltage range supported by the DG642DJ?
The DG642DJ supports an analog signal range of -5 V to +8 V when operated with V− = -5 V and V+ = +12 V, or 0 V to +8 V with V− = GND and V+ = +12 V. Signals exceeding V+ or V− are clamped by internal diodes, so forward current must be limited to 20 mA per datasheet Absolute Maximum Ratings.
Does the DG642DJ require external decoupling capacitors, and if so, what values are recommended?
Yes, the DG642DJ requires dedicated decoupling on both V+ and V− pins: a 10 µF tantalum bead capacitor plus a 0.1 µF ceramic capacitor placed as close as possible to each pin. This is mandatory to maintain 500 MHz bandwidth and prevent supply-induced crosstalk or switching instability.
Can the DG642DJ be used with a single positive supply, and how does that affect its analog performance?
Yes, the DG642DJ supports single-supply operation with V− tied to GND. However, this reduces analog swing to 0 V to +8 V and increases on-capacitance (CS(on) rises to 40 pF), lowering bandwidth margin. For ±5 V video or optimal linearity, dual-supply operation with V− ≈ -3 V is strongly recommended per Application Note 826.
Is the DG642DJ pinout compatible with other devices in the DG64x family, such as the DG641DJ or DG643DJ?
No, the DG642DJ has a unique 8-pin SOIC/DIP pinout distinct from the 16-pin DG641DJ (quad SPST) and DG643DJ (dual SPDT). Pin functions, count, and spacing differ - PCB layout and firmware control logic must be redesigned for cross-family substitution.
What is the guaranteed operating temperature range for the DG642DJ, and is extended temperature grade available?
The DG642DJ is rated for -40 °C to +85 °C ambient operation per its ordering information. Vishay does not offer extended temperature variants (e.g., -55 °C to +125 °C) for the DG642DJ; the DG64x family is specified exclusively for commercial/industrial grade use.
DG642DJ 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):
- 8Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 3V ~ 15V
- Voltage - Supply, Dual (V±):
- ±3V ~ 15V
- Switch Time (Ton, Toff) (Max):
- 100ns, 60ns
- -3db Bandwidth:
- 500MHz
- Charge Injection:
- 40pC
- Channel Capacitance (CS(off), CD(off)):
- 20pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 10nA
- Crosstalk:
- -85dB @ 5MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
DG642DJ FAQ
1.How can I place an order for DG642DJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG642DJ 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 DG642DJ reliable?
The price and inventory of DG642DJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG642DJ is usually 5 days.
3.What payment methods are accepted for DG642DJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG642DJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG642DJ?
DG642DJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG642DJ 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 DG642DJ?
For technical support, including DG642DJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG642DJ requirements.
6.How does Aetrix verify that DG642DJ is sourced from the original manufacturer or authorized distributors?
All DG642DJ 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 DG642DJ meets industry standards.
7.What is the process for return or replacement of DG642DJ?
All DG642DJ units undergo pre-shipment inspection (PSI). If there is an issue with DG642DJ, 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 DG642DJ part is unused and in its original packaging.
Return procedure for DG642DJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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