Vishay Siliconix DG308BDY-E3

Overview

DG308BDY-E3 from Vishay Siliconix is a quad single-pole single-throw (SPST) normally open analog switch IC designed for precision signal routing in ±15 V dual-supply or 12 V single-supply systems. It delivers 45 Ω typical on-resistance, <200 ns turn-on time, 1 pC charge injection, ±22 V analog signal handling, and 90 dB off-isolation at 100 kHz - enabling high-fidelity switching in test equipment front-ends and industrial data acquisition channels.

For engineers reviewing the DG308BDY-E3 datasheet, DG308BDY-E3 pinout, DG308BDY-E3 application, or DG308BDY-E3 equivalent, key selection criteria include guaranteed R_DS(on) matching (≤2%), low leakage (±20 pA off-state), bi-directional signal flow, RoHS-compliant TSSOP-16 packaging, and compatibility with CMOS/TTL logic levels (V_INH ≥ 11 V, V_INL ≤ 3.5 V).

Technical Context

The DG308BDY-E3 implements four independent SPST switches using silicon-gate CMOS process technology, with epitaxial layer latchup protection and internal clamping diodes limiting analog inputs to V+ + 2 V / V− − 2 V. Its charge-injection-compensated architecture minimizes transients during switching, critical for sample-and-hold and precision amplifier gain-selection circuits.

Each channel operates bidirectionally when on and blocks signals up to supply rails when off. Logic control uses voltage-threshold-based level shifting (not current-driven), supporting direct interface to standard digital outputs without external pull-ups or level translators across its −40 °C to +85 °C operating range.

Key Specifications

Pinout & Package

Package: 16-lead TSSOP (JEDEC MO-153, 5.0 mm × 6.4 mm × 1.2 mm), RoHS-compliant, lead-free termination (E3 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4617ESE+ and ADG1408BRUZ, the DG308BDY-E3 uniquely balances ±22 V analog range, sub-200 ns speed, and TSSOP-16 compactness - making it the only option among the three qualified for dual-supply industrial DAQ requiring rail-to-rail signal integrity and thermal stability to +85 °C.

Availability

DG308BDY-E3 is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, precision amplifier gain selection, and sample-and-hold circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG308BDY-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 semiconductor manufacturer specializing in discrete components and analog ICs, with leadership in power MOSFETs, diodes, optoelectronics, and precision analog switches.

The DG308B series belongs to Vishay's high-performance analog switch product line, engineered specifically for industrial and test instrumentation applications demanding wide supply voltage, low distortion, and robust thermal reliability.

FAQ

What is the maximum analog signal voltage the DG308BDY-E3 can handle?

The DG308BDY-E3 supports analog signals from V− − 2 V to V+ + 2 V. With ±15 V supplies, this yields a guaranteed ±17 V analog range; with ±22 V supplies, it extends to ±24 V. Internal clamping diodes protect against overvoltage, but forward current must be limited to 30 mA per terminal to avoid damage. This rating makes DG308BDY-E3 suitable for interfacing with high-voltage sensors and legacy industrial equipment.

Does the DG308BDY-E3 require external pull-up or pull-down resistors on its digital inputs?

No, the DG308BDY-E3 does not require external pull-up or pull-down resistors. Its digital inputs are CMOS-compatible with defined thresholds: logic high is ≥11 V and logic low is ≤3.5 V across the full −40 °C to +85 °C range. Input current remains within ±1 µA, allowing direct connection to microcontroller GPIOs, FPGA I/O banks, or TTL/CMOS logic outputs without additional biasing components.

Can the DG308BDY-E3 operate from a single 12 V supply?

Yes, the DG308BDY-E3 supports single-supply operation with V+ = 12 V and V− = 0 V. In this configuration, the analog signal range is 0–12 V, R_DS(on) increases to 90 Ω typical, t_ON extends to 300 ns, and charge injection rises to 4 pC. All logic thresholds and leakage specifications remain valid, enabling use in battery-powered portable instruments and embedded controllers where dual supplies are impractical.

How does the DG308BDY-E3 differ from the older DG308A version?

The DG308BDY-E3 delivers measurable improvements over the DG308A: 45 Ω vs. 65 Ω typical R_DS(on), 1 pC vs. 5 pC charge injection, <200 ns vs. 250 ns t_ON, and ±22 V vs. ±20 V supply rating. These enhancements stem from Vishay Siliconix' proprietary silicon-gate CMOS process and improved charge-injection compensation design - resulting in higher accuracy, lower distortion, and better thermal stability in demanding applications.

Is the DG308BDY-E3 pin-compatible with the DG308BDY or DG308BDY-T1 variants?

Yes, the DG308BDY-E3 is fully pin-compatible with DG308BDY and DG308BDY-T1. All share identical TSSOP-16 footprint, pinout, electrical characteristics, and thermal performance. The suffixes denote packaging and tape-and-reel options: -E3 indicates lead-free (RoHS-compliant) termination, -T1 denotes 1 k-unit tape-and-reel packaging, and bare part numbers indicate tube packaging. No PCB layout changes are required when substituting between these variants.