Vishay Siliconix DG333ALDW

Overview

DG333ALDW from Vishay Siliconix is a precision quad SPDT analog switch IC designed for high-accuracy signal routing in instrumentation and portable systems. It features 25 Ω typical on-resistance, <1 μA supply current, ±22 V dual-supply operation, and 175 ns turn-on time. Used in battery-powered test equipment where low leakage (0.25 nA max) and micro-power operation are critical.

For engineers reviewing the DG333ALDW datasheet, DG333ALDW pinout, DG333ALDW application, or DG333ALDW equivalent, key selection criteria include rail-to-rail analog range, break-before-make timing, charge injection (≤10 pC), on-resistance matching (<2 Ω), and SOIC-20 wide-body package compatibility with legacy layouts.

Technical Context

The DG333ALDW implements four independent SPDT switches fabricated in Vishay's HVSG-2 CMOS process, enabling bidirectional conduction, latchup immunity via epitaxial isolation, and operation from single (5–40 V) or dual (±4 to ±22 V) supplies. Its logic interface accepts TTL/CMOS levels (VINH ≥2.4 V, VINL ≤0.8 V) and supports break-before-make switching with 5 ns minimum delay.

It delivers precision analog performance through low distortion (flat RDS(on) Δ<3 Ω over ±10 V), minimal transients (improved charge injection compensation), and ultra-low off-leakage (0.25 nA max at 85°C). The DG333ALDW variant adds VL pin for separate logic supply control, reducing total power to <1 μW typ. when VL = 5 V.

Key Specifications

Pinout & Package

Package: 20-pin wide-body SOIC (SO-20W), 7.62 mm × 15.4 mm body, 1.27 mm pitch, JEDEC MS-013 compliant. Pin 15 is NC (no connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG333ALDW, MAX4617ESE+ trades precision and voltage range for smaller footprint, while ADG1434BRUZ prioritizes on-resistance and speed at the cost of micro-power capability and logic supply flexibility - making DG333ALDW optimal for battery-critical, high-voltage, low-distortion designs.

Availability

DG333ALDW is available at Aetrix Electronics and suitable for portable instrumentation, audio signal routing, and switched-capacitor networks requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DG333ALDW 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 switches, MOSFETs, and precision resistors for industrial and medical applications.

The DG333A/DG333AL family was engineered for high-accuracy analog signal routing in test equipment and portable instrumentation, emphasizing low leakage, rail-to-rail operation, and micro-power logic control.

FAQ

What is the maximum analog signal voltage range supported by the DG333ALDW?

The DG333ALDW supports analog signals from V− to V+, with absolute maximum ratings of ±22 V dual supply or 40 V single supply. Under normal operation, it handles continuous analog voltages up to the applied supply rails - e.g., ±15 V signals with ±15 V supplies - and clamps excursions beyond rails via internal diodes, provided forward current remains within 30 mA limits.

How does the VL pin on the DG333ALDW reduce power consumption?

The VL pin on the DG333ALDW allows independent biasing of the logic interface at 5 V, decoupling it from the analog supply rails. This enables the device to draw <1 μA logic supply current (IL) and <1 μA positive supply current (I+) when VL = 5 V, achieving <1 μW typical total power - critical for battery-operated systems where the DG333ALDW replaces higher-power alternatives like the DG333A.

Is pin 15 of the DG333ALDW functional or should it be left unconnected?

Pin 15 of the DG333ALDW is explicitly designated as NC (no connection) in the Vishay datasheet. It is not bonded internally and must remain unconnected on the PCB. Connecting pin 15 to any net - including GND or V− - may cause unpredictable behavior or violate absolute maximum ratings, as confirmed in the ordering information and pin diagram sections of document 70803.

Does the DG333ALDW support break-before-make timing, and what is its guaranteed minimum value?

Yes, the DG333ALDW guarantees break-before-make operation with a minimum time delay (tD) of 5 ns, measured from the 50% point of the control signal transition to the 50% point of the output disconnect event. This parameter is tested per Figure 3 in the datasheet and ensures no overlap between switch closure states, preventing transient shorts in multiplexed sensor or audio routing applications.

Can the DG333ALDW operate from a single 5 V supply, and what are the resulting performance trade-offs?

Yes, the DG333ALDW supports single-supply operation from 5 V to 40 V. At 5 V, analog signal range is limited to 0 V to 5 V, on-resistance increases to 75 Ω max (vs. 45 Ω at ±15 V), and turn-on time degrades to 90 ns typ. Leakage and charge injection remain unchanged. These trade-offs are documented in the "Specifications (Unipolar Supplies)" table on page 4 of datasheet 70803.