Analog Devices Inc./Maxim Integrated DG528DJ

Overview

DG528DJ from Maxim Integrated is a monolithic, single-ended 1-of-8 CMOS analog multiplexer with on-board address latches, break-before-make switching, ±4.5V to ±20V dual-supply or +5V to +30V single-supply operation, and TTL/CMOS-compatible digital inputs - used in microprocessor-controlled data-acquisition systems for reliable channel selection under dynamic bus control.

For engineers reviewing the DG528DJ datasheet, DG528DJ pinout, DG528DJ application, or DG528DJ equivalent, key selection considerations include its latchable address interface, 400Ω max rDS(ON) at ±15V, -40°C to +85°C industrial temperature range, 18-pin plastic DIP package, and compatibility with legacy DG528/DG529 designs requiring stable analog signal routing without external latching logic.

Technical Context

The DG528DJ implements an 8-channel analog switch matrix controlled by three address bits (A2/A1/A0), enable (EN), write strobe (WR), and reset (RS). Its internal structure uses parallel N- and P-channel MOSFETs per switch, with level-shifted digital inputs referenced to GND and guaranteed TTL thresholds (VAL ≤0.8V, VAH ≥2.4V) across temperature.

It supports transparent mode (WR low, RS high), latched mode (WR high), and full-channel reset (RS low). Break-before-make timing is guaranteed at 0.2µs min, and charge injection is limited to 4pC - critical for precision sampling in data-acquisition front-ends where signal integrity and settling time must be preserved across channel transitions.

Key Specifications

Pinout & Package

Package: 18-pin plastic DIP (0.300" wide), JEDEC MS-001, body dimensions 0.390" × 0.250" × 0.200", lead pitch 0.100".

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG528DJ, ADG528AKRZ offers superior temperature resilience and lower on-resistance but requires SOIC layout adaptation, while DG528DN delivers identical performance in a surface-mount form factor - making DG528DJ the optimal choice for industrial retrofits and through-hole-based DAQ modules needing zero-layout change.

Availability

DG528DJ is available at Aetrix Electronics and suitable for data-acquisition systems, automatic test equipment, and avionics subsystems requiring stable component supply with long-term industrial temperature support and legacy pin compatibility.

Supply support for DG528DJ 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The DG528DJ belongs to Maxim's legacy precision analog switch family, designed specifically for microprocessor-controlled data-acquisition systems requiring latchable addressing, robust supply flexibility, and guaranteed break-before-make behavior in harsh environments.

FAQ

What is the maximum analog signal voltage range supported by the DG528DJ?

The DG528DJ supports an analog signal range of ±15V when operated with ±15V supplies, or 0V to +15V with a single +15V supply. Its absolute maximum ratings allow V+ up to +44V and V- down to -44V relative to GND, but functional analog swing is constrained by the supply rails. For asymmetric supplies like +15V/-5V, the usable range extends from -5V to +15V - confirmed in the Electrical Characteristics table under VANALOG parameter.

Does the DG528DJ require external latching logic when interfaced with a microprocessor bus?

No, the DG528DJ does not require external latching logic because it integrates on-board address latches controlled by the WR (write) and RS (reset) strobes. When WR transitions high, the current A2/A1/A0 state is captured and held indefinitely until the next WR pulse or RS assertion. This feature is explicitly documented in the Detailed Description section and Truth Table 1, enabling direct µP-bus interfacing without 74-series latch ICs.

What is the guaranteed break-before-make interval for the DG528DJ, and why is it important?

The DG528DJ guarantees a minimum break-before-make interval of 0.2µs, measured as the open time between deactivation of one channel and activation of the next. This prevents momentary shorting of input signals during switching - a critical requirement in data-acquisition systems where shorted sensor outputs could damage transducers or corrupt measurements. The value is specified in the Electrical Characteristics table under tOPEN parameter.

Can the DG528DJ operate from a single +5V supply, and how does performance change?

Yes, the DG528DJ operates from a single +5V supply (V+ = +5V, V- = GND), with guaranteed functionality across its full -40°C to +85°C range. At +5V, switching delays approximately double compared to ±15V operation, but break-before-make action remains preserved. Digital thresholds stay within TTL-compatible levels (VAL ≤0.8V, VAH ≥2.4V), and rDS(ON) increases to ~600Ω - all confirmed in the "Operation with Supply Voltages Other Than ±15V" section.

Is the DG528DJ pin-compatible with the ADG528 series, and what are the key compatibility notes?

Yes, the DG528DJ is pin and electrically compatible with the ADG528 series, as stated in the Features section: "Pin and Electrically Compatible with the Industry-Standard DG528/DG529 and ADG528/ADG529." This includes identical pin functions, supply connections, timing behavior, and logic thresholds. However, ADG528 variants may offer tighter rDS(ON) specs or lower charge injection - differences that affect precision but not physical or functional interchangeability in most legacy designs.