Analog Devices Inc./Maxim Integrated DG509ACWE+

Overview

DG509ACWE+ from Maxim Integrated is a differential 4-channel (2-of-8) monolithic CMOS analog multiplexer with ±4.5V to ±18V dual-supply operation, break-before-make switching, and guaranteed latchup immunity during power-off signal presence. It features 500Ω typical on-resistance, <0.5nA off-leakage at ±10V, and 0.6μs channel switching time - deployed in aircraft heads-up displays and precision data-acquisition systems.

For engineers reviewing the DG509ACWE+ datasheet, DG509ACWE+ pinout, DG509ACWE+ application, or DG509ACWE+ equivalent, key selection criteria include its differential channel architecture, wide supply range compatibility, low leakage under high-voltage analog signals, and TTL/CMOS logic interface requirements for control system signal routing.

Technical Context

The DG509ACWE+ implements a fully symmetrical, bidirectional analog switch matrix with dedicated A0/A1 address decoding and EN enable control. Its internal CMOS design ensures matched on-resistance across all four differential pairs and maintains signal integrity over ±15V analog swings.

Break-before-make timing is guaranteed at ≤0.2μs, preventing momentary shorting between channels during switching. The device operates without latchup even when input signals remain present while V+ or V− supplies are ramped down or absent - critical for fault-tolerant industrial control interfaces.

Key Specifications

Pinout & Package

Package: 16-pin Wide SO (W16-2), RoHS-compliant, surface-mount, 7.5mm × 10.3mm body, 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG509ACWE+, MAX339CPE+ delivers lower on-resistance and broader supply tolerance but requires layout review for updated decoupling; ADG509AKRZ-REEL7 provides superior thermal range and ESD rating while maintaining pin-compatible footprint and functional equivalence for drop-in qualification.

Availability

DG509ACWE+ is available at Aetrix Electronics and suitable for aircraft HUDs, industrial data-acquisition systems, control system feedback loops, and test & measurement signal routing requiring stable component supply across long production lifecycles.

Supply support for DG509ACWE+ 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, and communications infrastructure.

The DG509ACWE+ belongs to Maxim's legacy monolithic CMOS analog switch family, engineered for high-voltage, fault-tolerant signal routing in mission-critical control and measurement systems.

FAQ

What is the maximum analog signal voltage range supported by the DG509ACWE+?

The DG509ACWE+ supports an analog signal range of ±15V when operated with ±15V supplies. Its absolute maximum ratings allow V+ up to +44V referenced to V−, but specified performance (including on-resistance and leakage) is guaranteed only within ±4.5V to ±18V supply operation. For DG509ACWE+, the usable analog swing remains ±15V under standard ±15V bias conditions.

Does the DG509ACWE+ require external pull-up or pull-down resistors on its address or enable pins?

No, the DG509ACWE+ does not require external pull-up or pull-down resistors on A0, A1, or EN pins. Its logic inputs are TTL- and CMOS-compatible with guaranteed recognition of 0.8V (low) and 2.4V (high) thresholds. Input leakage remains below ±30μA across temperature, allowing direct connection to microcontroller GPIOs or FPGA I/O banks without additional biasing components.

Can the DG509ACWE+ be used in single-supply configurations?

The DG509ACWE+ is designed for dual-supply operation (±4.5V to ±18V) and does not support true single-supply use. While some legacy applications have used asymmetric supplies (e.g., +15V/V− = GND), the datasheet specifies continuous operation only with both positive and negative rails. For single-supply designs, Maxim recommends the MAX338/MAX339 series instead of DG509ACWE+.

How does the break-before-make timing of the DG509ACWE+ affect system-level signal integrity?

The DG509ACWE+ guarantees a break-before-make interval of ≤0.2μs, preventing momentary conduction between previously selected and newly selected differential channel pairs. This eliminates transient short-circuits that could corrupt downstream amplifiers or ADC references - especially critical in high-gain, low-noise signal chains used in DG509ACWE+ deployments like aircraft HUDs and precision DAQ systems.

Is the DG509ACWE+ pin-compatible with older DG509A variants in wide SO packaging?

Yes, the DG509ACWE+ is a direct replacement for the industry-standard DG509A in 16-pin Wide SO packaging. It retains identical pinout, electrical behavior, and mechanical footprint per W16-2 package drawing. The "+" suffix denotes lead-free/RoHS compliance, with no functional or timing differences from non-+ versions - making DG509ACWE+ suitable for drop-in upgrades in existing DG509A designs.