Vishay Siliconix DG441BDY

Overview

DG441BDY from Vishay Siliconix is a monolithic quad SPST CMOS analog switch optimized for high-speed, low-error analog and audio signal routing in dual- or single-supply systems. It delivers 45 Ω typical on-resistance, 120 ns typical turn-on time, and –1 pC charge injection-enabling precision sample-and-hold, data acquisition, and communication system switching.

For engineers reviewing the DG441BDY datasheet, DG441BDY pinout, DG441BDY application, or DG441BDY equivalent, key selection criteria include guaranteed on-resistance matching (≤4 Ω), sub-nA off-leakage (±0.01 nA), TTL/CMOS-compatible logic thresholds, and SOIC-16 package compatibility with industrial temperature range (–40 °C to +85 °C).

Technical Context

The DG441BDY implements four independent bidirectional analog switches controlled by active-low logic inputs (IN1–IN4), each conducting equally well in both directions when ON and blocking signals beyond supply rails when OFF. Its silicon-gate process includes an epitaxial layer to prevent latchup, and internal clamping diodes protect against overvoltage on S/D/IN pins.

It supports dual-supply operation (±15 V) with full analog signal range of ±15 V, or single-supply mode (0–12 V) with 0–12 V analog swing. Logic interface thresholds are fixed at VINL ≤ 0.8 V and VINH ≥ 2.4 V, ensuring robust noise immunity across temperature.

Key Specifications

Pinout & Package

Package: 16-pin narrow-body SOIC (JEDEC MS-012), 3.80–4.00 mm body width, 1.27 mm lead pitch, RoHS-compliant, surface-mountable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG441BDY, MAX4617ESE+ trades speed and on-resistance for lower charge injection, while ADG1412BRUZ delivers superior R_DS(on) and speed at the cost of higher quiescent power and loss of single-supply flexibility-making DG441BDY the balanced choice for industrial DAQ and audio routing where supply simplicity and moderate performance coexist.

Availability

DG441BDY is available at Aetrix Electronics and suitable for data acquisition, audio signal routing, sample-and-hold circuits, and communication system front-ends requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for DG441BDY 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 MOSFETs, diodes, optoelectronics, and precision analog switches, with emphasis on high-reliability, high-performance components for industrial and automotive markets.

The DG441B family was designed specifically for high-fidelity analog signal switching in measurement, instrumentation, and communications systems-prioritizing low distortion, low leakage, and robust supply flexibility over raw speed or ultra-low R_DS(on).

FAQ

What is the maximum analog signal voltage range supported by the DG441BDY?

The DG441BDY supports a full analog signal range of ±15 V when operated with dual supplies (V+ = +15 V, V– = –15 V). In single-supply mode (V– = 0 V), it handles 0 V to 12 V analog signals. Exceeding these limits triggers internal clamping diodes, so input signals must stay within (V–) –2 V to (V+) +2 V to avoid forward-biasing protection structures. This range is confirmed in the Absolute Maximum Ratings and Specification tables of Vishay Document 72625.

Does the DG441BDY require external pull-up or pull-down resistors on its digital control inputs?

No, the DG441BDY does not require external pull-up or pull-down resistors on IN1–IN4. Its TTL/CMOS-compatible inputs have defined logic thresholds (VINL ≤ 0.8 V for "0", VINH ≥ 2.4 V for "1") and specify input currents of ±1 µA max across temperature-low enough to be driven directly by standard logic outputs. External resistors are unnecessary unless system-level noise immunity or fail-safe default states demand them, which is outside the device's intrinsic requirements.

Can the DG441BDY be used with a single 5 V supply?

Yes, the DG441BDY operates with a single 5 V supply (V+ = 5 V, V– = 0 V), though its analog signal range is reduced to 0–5 V and on-resistance increases to 160 Ω typ. (vs. 45 Ω at ±15 V). The logic interface remains compatible, and all timing parameters-including 120 ns t_ON-are maintained per specification. This configuration is validated in the Single-Supply Specifications table of Document 72625 and suits low-voltage portable instrumentation.

How does the DG441BDY handle bidirectional signal flow in its analog channels?

The DG441BDY's analog switches are fully bidirectional: when ON, current flows equally well from source (Sx) to drain (Dx) or drain to source, with identical R_DS(on), capacitance, and leakage in both directions. This is inherent to its CMOS transmission-gate architecture and explicitly stated in the datasheet description ("conducts equally well in both directions"). No directionality is imposed-designers may assign either terminal as input or output based on PCB layout and signal chain topology.

Is the DG441BDY pin-compatible with the original DG441 or DG441B variants in SOIC-16?

Yes, the DG441BDY is pin-compatible with all DG441B variants in the 16-pin narrow SOIC package, including DG441BDY-E3 and DG441BDY-T1-E3. Pin numbering, function mapping (IN1–IN4, S1–S4, D1–D4, V+, V–, GND, NC), and mechanical footprint match exactly per Vishay's Ordering Information table and Package Drawing 71261. No PCB redesign is needed when upgrading from earlier DG441B SOIC versions.