Vishay Siliconix DG303BDY-E3

Overview

DG303BDY-E3 from Vishay Siliconix is a dual SPDT CMOS analog switch IC designed for precision signal routing in instrumentation and process control systems. It supports ±15 V analog signal range, exhibits 30 Ω typical on-resistance, 150 ns turn-on time, and operates with dual supplies (±15 V) or single supply (V− = 0 V). It is used in programmable gain amplifiers requiring break-before-make switching.

For engineers reviewing the DG303BDY-E3 datasheet, DG303BDY-E3 pinout, DG303BDY-E3 application, or DG303BDY-E3 equivalent, key selection criteria include guaranteed rail-to-rail analog swing, low charge injection (8 pC), off-isolation of 62 dB at 500 kHz, and SOIC-14 packaging compatible with automated PCB assembly.

Technical Context

The DG303BDY-E3 implements two independent SPDT switches with break-before-make timing (50 ns typical) to prevent signal shorting during state transitions. Each switch conducts bidirectionally with no offset voltage and maintains low leakage (<±0.1 nA at 85 °C) across its full ±15 V analog range.

It uses Vishay's PLUS-40 CMOS process with epitaxial isolation to ensure latch-up immunity and supports logic-level compatibility (VINH ≥ 4 V, VINL ≤ 0.8 V) with both CMOS and quasi-TTL drivers. Power dissipation is 3.5 mW typical under active operation.

Key Specifications

Pinout & Package

Package: 14-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant lead (Pb)-free termination per DG303BDY-E3 ordering code. Body dimensions: 8.75 mm × 4.00 mm × 1.75 mm (D × E × A).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4677ESE+ and ADG1434BRUZ, DG303BDY-E3 delivers optimal balance of low on-resistance (30 Ω), low charge injection (8 pC), and industry-standard SOIC-14 footprint - making it preferred for cost-sensitive, high-accuracy dual-path routing where layout reuse and thermal stability matter.

Availability

DG303BDY-E3 is available at Aetrix Electronics and suitable for programmable gain amplifiers, instrumentation multiplexers, battery-powered data loggers, process control signal routers, and low-leakage sensor interface circuits requiring stable component supply across industrial temperature ranges (−40 °C to +85 °C).

Supply support for DG303BDY-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 emphasis on reliability, precision, and ruggedness for industrial and automotive markets.

The DG300B family-including DG303BDY-E3-is engineered for high-fidelity analog signal routing in instrumentation, process control, and communications equipment where low leakage, rail-to-rail operation, and latch-up immunity are mandatory.

FAQ

What is the maximum analog signal voltage range supported by DG303BDY-E3?

DG303BDY-E3 supports a full ±15 V analog signal range when operated with dual supplies (V+ = +15 V, V− = −15 V). This allows undistorted switching of rail-to-rail signals in bipolar systems. The device also supports single-supply operation (V− = 0 V), limiting the analog range to 0 V to +15 V. Absolute maximum analog voltage is clamped to V+ + 2 V and V− − 2 V by internal protection diodes.

Does DG303BDY-E3 require external pull-up or pull-down resistors on its digital control inputs?

No, DG303BDY-E3 does not require external pull-up or pull-down resistors. Its digital inputs are CMOS-compatible with defined logic thresholds: VINH ≥ 4 V for "high" and VINL ≤ 0.8 V for "low". Input leakage is extremely low (±1 µA max), so the driving source must only meet these voltage levels - no additional biasing is needed for proper switching behavior.

Can DG303BDY-E3 be used in single-supply systems with V− tied to ground?

Yes, DG303BDY-E3 supports single-supply operation by connecting V− to 0 V (GND). In this configuration, the analog signal range becomes 0 V to V+ (e.g., 0 V to +15 V), and logic inputs retain the same 0.8 V / 4 V thresholds. Note that RDS(on) increases slightly and switching speed decreases modestly compared to dual-supply operation - refer to Figure 5 and Typical Characteristics on page 8 of the datasheet for exact trade-offs.

What is the thermal performance of DG303BDY-E3 in SOIC-14 package?

In SOIC-14 package, DG303BDY-E3 has a power dissipation rating of 600 mW at 25 °C, derating linearly at 7.6 mW/°C above 75 °C. At full load (two switches conducting 10 mA each at 30 Ω), power dissipation remains below 10 mW - well within safe operating limits. Junction-to-ambient thermal resistance (θJA) is approximately 208 °C/W, allowing reliable operation up to +85 °C ambient without heatsinking.

Is DG303BDY-E3 pin-compatible with other members of the DG300B family like DG301BDJ-E3?

No, DG303BDY-E3 is not pin-compatible with DG301BDJ-E3. DG303BDY-E3 is a dual SPDT switch in SOIC-14 package with dedicated IN1/IN2 controls and four drain pins (D1–D4), whereas DG301BDJ-E3 is a single SPDT in 14-pin DIP with different pin mapping (e.g., shared IN, S1/S2, D1/D2). Pinouts differ significantly across DG300B variants - always verify against the specific functional block diagram for DG303B on page 2 of document 71402.