Vishay Siliconix DG641DY-E3

Overview

DG641DY-E3 from Vishay Siliconix is a quad single-pole single-throw (SPST) analog switch optimized for wideband video and RF signal routing. It delivers 500 MHz bandwidth, 5 Ω typical R_DS(on) (per channel), -87 dB crosstalk at 5 MHz, and TTL-compatible digital control with 50 ns turn-on time. It operates from ±3 V to ±15 V dual supplies and supports bidirectional signal flow in RGB, composite video, and ATE systems.

For engineers reviewing the DG641DY-E3 datasheet, DG641DY-E3 pinout, DG641DY-E3 application, or DG641DY-E3 equivalent, key selection criteria include guaranteed 500 MHz bandwidth into 50 Ω, low 10 pF on-state input capacitance, -40 °C to +85 °C industrial temperature range, SOIC-16 package compatibility, and verified performance in high-fidelity video multiplexing.

Technical Context

The DG641DY-E3 implements four independent SPST switches fabricated using Vishay's proprietary D/CMOS process, enabling true bidirectional analog signal conduction with matched R_DS(on) (≤2 Ω max mismatch) and negligible nonlinearity. Its on-chip regulator maintains TTL logic thresholds across full supply ranges (V+ = 15 V, V− = −3 V).

Each channel features symmetrical source/drain terminals, 14 V_p-p off-state blocking capability, and epitaxial layer latch-up protection. Dynamic performance is sustained by low 10 pF CS(on) and 4–12 pF CD(off)/CS(off), enabling flat frequency response up to 500 MHz with minimal group delay distortion.

Key Specifications

Pinout & Package

Package: 16-pin narrow SOIC (JEDEC MS-012), 3.9 mm × 9.9 mm body, 1.27 mm pitch, 1.75 mm max height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Compared with MAX4617ESE+ and ADG612BRUZ, the DG641DY-E3 provides superior 500 MHz bandwidth and guaranteed -40 °C to +85 °C operation-making it the preferred choice for military-grade radar, broadcast video, and high-reliability ATE systems demanding full-spec performance across temperature extremes.

Availability

DG641DY-E3 is available at Aetrix Electronics and suitable for RGB video multiplexing, automated test equipment (ATE) signal routing, and radar front-end switching requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DG641DY-E3 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-performance analog switching, power management, and sensing solutions.

The DG641DY-E3 belongs to Vishay's wideband analog switch product line, engineered specifically for high-fidelity video, RF, and precision instrumentation applications where bandwidth, crosstalk, and signal integrity are critical.

FAQ

What is the maximum analog signal voltage range supported by the DG641DY-E3?

The DG641DY-E3 supports analog signals from V− to V+, with absolute maximum ratings of V− = −19 V and V+ = +21 V. For standard operation, the recommended range is V− = −5 V to GND and V+ = +12 V, enabling ±5 V peak-to-peak signal handling. Exceeding V− by more than −0.3 V forward-biases internal diodes, so proper supply rail design is essential. The DG641DY-E3 datasheet specifies this limit under Absolute Maximum Ratings.

Does the DG641DY-E3 require external decoupling capacitors, and if so, what values are recommended?

Yes, the DG641DY-E3 requires dedicated decoupling on both V+ and V− pins due to its high-frequency operation and substrate-coupled architecture. Vishay recommends a 10 µF tantalum bead capacitor plus a 0.1 µF ceramic capacitor placed within 5 mm of each supply pin. This dual-capacitor approach suppresses both low-frequency supply sag and high-frequency ringing that would otherwise degrade the DG641DY-E3's 500 MHz bandwidth and crosstalk performance.

Can the DG641DY-E3 be operated from a single positive supply, and how does that affect its analog signal range?

Yes, the DG641DY-E3 supports single-supply operation with V− tied to GND and V+ set to +12 V or +15 V. In this configuration, the analog signal range is limited to 0 V to V+ − 0.3 V (e.g., 0–11.7 V at V+ = 12 V). To preserve full bidirectional capability, dual supplies (e.g., V+ = +15 V, V− = −3 V) are required-this enables true ±5 V signal handling without DC biasing networks. The DG641DY-E3 functional description confirms this flexibility in the Applications section.

How does the DG641DY-E3 achieve TTL compatibility across varying supply voltages?

The DG641DY-E3 integrates an on-chip voltage regulator that stabilizes internal logic thresholds regardless of V+ and V− values. This ensures consistent VINH = 2.4 V and VINL = 0.8 V levels even when V+ varies from +5 V to +21 V, eliminating the need for external level shifters. The regulator is part of the D/CMOS process architecture and is explicitly documented in the DG641DY-E3 Applications section as enabling "TTL input compatibility over the whole operating supply voltage range."

Is the DG641DY-E3 pinout compatible with other Vishay analog switches like the DG642 or DG643?

No, the DG641DY-E3 has a unique 16-pin SOIC pinout optimized for quad SPST topology, while DG642 (SOIC-8) and DG643 (SOIC-16) implement SPDT and dual-SPDT functions respectively. Their pin assignments differ fundamentally-for example, DG642 uses pins 1–4 for control and signal paths, whereas DG641DY-E3 dedicates pins 1–4 to inputs and 5–8 to outputs. Direct replacement is not possible without PCB redesign. The DG641DY-E3 pin configuration diagram in the datasheet confirms this distinct layout.