Vishay Siliconix DG403BDJ

Overview

DG403BDJ from Vishay Siliconix is a quad SPST analog switch with break-before-make switching action, ±15 V analog signal range, 23 Ω typical on-resistance, 100 ns turn-on time, and TTL/CMOS-compatible digital control-used in stereo source selection, dual-slope integrators, and switched-capacitor filters.

For engineers reviewing the DG403BDJ datasheet, DG403BDJ pinout, DG403BDJ application, or DG403BDJ equivalent, this page delivers verified electrical parameters, package mapping to 16-pin plastic DIP, functional pin roles, real-world use cases, and two confirmed alternative parts for audio routing and precision analog switching designs.

Technical Context

The DG403BDJ implements four independent SPST switches arranged in two NO/NC pairs, with guaranteed break-before-make timing (5–12 ns delay) between complementary switch groups. Its silicon-gate CMOS process enables ±15 V analog rail operation and low 40 pA channel-on leakage at room temperature.

Switching is controlled by two logic inputs (IN1, IN2) that drive complementary output states: when IN1 = 1 and IN2 = 0, SW1/SW2 are ON and SW3/SW4 are OFF; reversal toggles the active pair. Input thresholds are specified at ≤0.8 V (low) and ≥2.4 V (high) across -40 °C to +85 °C.

Key Specifications

Pinout & Package

DG403BDJ is housed in a 16-pin plastic dual-in-line (DIP) package per JEDEC MS-012, with 2.54 mm lead pitch, 10.0 mm body width, and through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad SPST analog switching applications.

Compared with DG403BDJ, MAX4633ESE+ offers lower on-resistance but sacrifices bipolar voltage headroom and switching safety, while ADG403BRZ matches voltage and safety specs but trades speed and resistance for packaging convenience-making DG403BDJ optimal for DIP-based, ±15 V, high-fidelity analog routing.

Availability

DG403BDJ is available at Aetrix Electronics and suitable for stereo audio routing, dual-slope integrators, and switched-capacitor filter design requiring stable component supply across industrial, test equipment, and embedded instrumentation programs.

Supply support for DG403BDJ 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, analog switches, and power management devices with emphasis on reliability and high-voltage performance.

The DG403BDJ belongs to the DG40xB series of low-power, high-speed CMOS analog switches designed for precision signal routing in battery-powered, audio, test, and telecom equipment where rail-to-rail analog handling and switching integrity are critical.

FAQ

What is the maximum analog signal voltage supported by DG403BDJ?

DG403BDJ supports an analog signal range of ±15 V, with absolute maximum ratings allowing up to ±22 V on V+ and V− rails. Signals exceeding V+ or V− are clamped by internal diodes, so external limiting is required beyond those limits. The device maintains flat on-resistance and low leakage across the full ±15 V span, making DG403BDJ suitable for professional audio and industrial sensor interfaces.

Does DG403BDJ require separate analog and digital ground connections?

DG403BDJ has a single GND pin (Pin 12) serving as the reference for digital control inputs, but best practice requires separation of analog and digital grounds in PCB layout. While the IC does not enforce dual-ground topology, mixing noisy digital return currents with sensitive analog paths degrades off-isolation and increases crosstalk. For optimal performance in DG403BDJ-based sample-and-hold or audio circuits, use star grounding or split-plane techniques with local decoupling near V+ and V− pins.

How does the break-before-make function operate in DG403BDJ?

In DG403BDJ, break-before-make is implemented between the two SPST switch pairs: when IN1 and IN2 toggle state, SW1/SW2 disconnect before SW3/SW4 connect (or vice versa), with a guaranteed 5–12 ns delay. This prevents momentary shorting between independent signal sources-critical in stereo selector and dual-integrator applications. The timing is process-guaranteed and does not require external timing circuitry, unlike discrete MOSFET solutions.

Can DG403BDJ be used with a single +12 V supply instead of dual ±15 V rails?

Yes, DG403BDJ supports single-supply operation from +5 V to +44 V. With V+ = +12 V and V− = GND, the analog signal range becomes 0 V to +12 V. However, the ±15 V specification assumes symmetric rails; using single supply reduces dynamic range and may increase R_DS(on) nonlinearity near the top rail. DG403BDJ remains fully functional, but designers should consult the R_ON vs. analog voltage curve in the datasheet for accuracy-critical uses.

What is the thermal derating behavior of DG403BDJ above 75 °C?

DG403BDJ's power dissipation must be derated by 6 mW/°C above 75 °C for the 16-pin plastic DIP package. At 125 °C ambient, maximum allowable power drops to 150 mW (450 mW − 6 mW × 50 °C). This reflects junction-to-ambient thermal resistance limitations. To maintain reliability in high-temperature environments, ensure adequate PCB copper area, avoid stacking heat-generating components nearby, and verify junction temperature using I²R losses and ambient conditions in the final DG403BDJ application.