Vishay Siliconix DG405BDY

Overview

DG405BDY from Vishay Siliconix is a low-power, high-speed CMOS analog switch configured as two independent SPST switches in a 16-pin SOIC package. It supports ±15 V analog signal range, exhibits 23 Ω typical on-resistance (R_DS(on)), and achieves 100 ns typical turn-on time (t_ON). It is used in stereo audio source selection circuits where bidirectional signal integrity and low charge injection are critical.

For engineers reviewing the DG405BDY datasheet, DG405BDY pinout, DG405BDY application, or DG405BDY equivalent, this device serves as a drop-in upgrade to legacy DG405 analog switches with improved leakage (40 pA ID(on)), single-supply capability, TTL/CMOS compatibility, and guaranteed break-before-make switching behavior in its SPST-pair configuration.

Technical Context

The DG405BDY integrates two matched SPST analog switches fabricated using Vishay Siliconix's high-voltage silicon-gate process, enabling 44 V supply rating and stable R_DS(on) flatness across the full ±15 V analog range. Each switch conducts equally in both directions when on and blocks up to 30 V peak-to-peak when off.

It features logic-compatible control inputs (V_IN low ≤ 0.8 V, high ≥ 2.4 V), operates from dual supplies (±15 V typical) or single supply, and delivers low dynamic parameters: 100 ns t_ON, 60 ns t_OFF, and 60 pC typical charge injection - critical for precision sample-and-hold and switched-capacitor filter applications.

Key Specifications

Pinout & Package

Package: 16-pin narrow SOIC (JEDEC MS-012, body width 3.9 mm, pitch 1.27 mm). RoHS-compliant, lead (Pb)-free terminations with "-E3" suffix.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG405BDY, MAX4617ESE+ offers smaller footprint but halves channel density and increases on-resistance, while ADG1419BRUZ provides superior R_DS(on) and integrated SPDT functionality at higher cost and power - DG405BDY balances channel count, speed, leakage, and cost for mid-performance analog routing.

Availability

DG405BDY is available at Aetrix Electronics and suitable for audio routing, test equipment multiplexing, dual-slope integrators, and switched-capacitor filters requiring stable component supply across industrial temperature ranges (−40 °C to +85 °C).

Supply support for DG405BDY 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 and analog ICs, with leadership in high-voltage, high-reliability switching solutions.

The DG405BDY belongs to the DG40xB series of high-speed CMOS analog switches designed for precision signal routing in portable, test, and industrial systems where low power, low leakage, and rail-to-rail analog performance are essential.

FAQ

What is the maximum supply voltage rating for DG405BDY?

The DG405BDY supports a maximum V+ to V− differential voltage of 44 V. This allows operation with supply rails such as +22 V / −22 V or +30 V / −14 V, provided each terminal stays within absolute maximum ratings - e.g., digital inputs must remain between (V−) − 0.3 V and (V+) + 0.3 V. Exceeding these limits risks permanent damage.

Does DG405BDY support single-supply operation?

Yes, DG405BDY supports true single-supply operation: V+ can be set from 5 V to 22 V while V− is tied to GND. In this mode, the analog signal range is 0 V to (V+ − 0.3 V), and logic thresholds scale accordingly (e.g., V_IN high ≥ 2.4 V remains valid). The device maintains specified R_DS(on) and leakage performance under single-supply conditions.

What is the guaranteed break-before-make timing for DG405BDY?

The DG405BDY guarantees break-before-make timing as part of its SPST-pair architecture - confirmed in the functional block diagram and truth table. While exact t_D is not specified for DG405B (unlike DG403B's 5–12 ns), the internal layout and silicon-gate process ensure no overlap between switch OFF and subsequent ON states, preventing signal shorting during state transitions.

How does DG405BDY compare to the legacy DG405 in terms of performance?

DG405BDY is a direct performance upgrade over the original DG405: it delivers 23 Ω typical R_DS(on) (vs. 45 Ω), 100 ns t_ON (vs. 150 ns), and 40 pA ID(on) leakage (vs. 100 pA), all while maintaining pin compatibility and identical SOIC-16 footprint. It also adds lead-free "-E3" termination and improved thermal derating (600 mW SOIC power dissipation).

Can DG405BDY handle bipolar analog signals up to ±15 V?

Yes, DG405BDY is explicitly rated for ±15 V analog signal range with guaranteed performance - including flat 23 Ω R_DS(on) and sub-nA leakage across that full range. Internal clamp diodes protect against overvoltage, but sustained signals beyond (V−) − 0.3 V or (V+) + 0.3 V must be externally limited to avoid forward-biasing those diodes and exceeding 30 mA current rating.