Analog Devices Inc./Maxim Integrated DG442CJ

Overview

DG442CJ from Maxim Integrated is a quad, normally-open (NO), single-pole/single-throw (SPST) analog switch IC designed for precision signal routing in bipolar or single-supply systems. It delivers 85Ω max on-resistance, 4Ω max on-resistance matching between channels, <5nA off-leakage at +85°C, 10pC max charge injection, and rail-to-rail analog signal handling from ±15V supplies - enabling use in test equipment front-ends and audio multiplexing.

For engineers reviewing the DG442CJ datasheet, DG442CJ pinout, DG442CJ application, or DG442CJ equivalent, key selection criteria include guaranteed r_DS(ON) flatness (9Ω max), TTL/CMOS logic compatibility, dual-supply operation (±4.5V to ±20V), low power consumption (1.65mW), and ESD tolerance (2000V per Method 3015.7).

Technical Context

The DG442CJ implements four independent SPST switches with active-high digital control inputs (IN1–IN4), each connecting source (Sx) to drain (Dx) when asserted. Its silicon-gate 44V process ensures robust operation across wide supply ranges and temperature extremes.

Switching is bidirectional and symmetrical, with t_ON < 250ns and t_OFF < 170ns under ±15V conditions. On-resistance matching (4Ω max) and flatness (9Ω max) are guaranteed only under bipolar-supply operation, reflecting its design for precision instrumentation where channel consistency is critical.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (0°C to +70°C operating range). Exposed pad not present - this variant uses through-hole leadframe construction without thermal EP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG442BRZ and TS5A3154DCUR, the DG442CJ uniquely combines guaranteed r_FLAT(ON), ±15.5V rail-to-rail operation, and <5nA leakage at +85°C - making it irreplaceable in high-accuracy, wide-supply instrumentation where channel-to-channel consistency is non-negotiable.

Availability

DG442CJ is available at Aetrix Electronics and suitable for test equipment signal routing, audio multiplexer front-ends, and portable data logger analog mux applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for DG442CJ 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The DG442CJ belongs to Maxim's precision analog switch family, engineered for applications demanding low distortion, tight channel matching, and robust operation in harsh electrical environments - especially where legacy industry-standard pinouts and performance must be maintained.

FAQ

What is the maximum analog signal voltage range supported by the DG442CJ?

The DG442CJ supports a rail-to-rail analog signal range up to ±15.5V when operated from ±16.5V supplies, and up to +12V with a +12V single supply (V− = 0V). This range is defined by the absolute maximum ratings and verified in the Electrical Characteristics tables for both dual- and single-supply configurations. The DG442CJ maintains specified on-resistance and leakage performance across this full range, making it suitable for industrial sensor interfaces and test equipment.

Does the DG442CJ require external pull-up or pull-down resistors on its digital inputs?

No, the DG442CJ does not require external pull-up or pull-down resistors on IN1–IN4. Its digital inputs are TTL/CMOS-compatible with guaranteed logic thresholds: VINL ≤ 0.8V (low) and VINH ≥ 2.4V (high) over temperature. Input current is limited to ±5nA at +25°C, so direct connection to microcontroller GPIO or FPGA outputs is fully supported without additional biasing components - simplifying layout and reducing BOM count for the DG442CJ.

Can the DG442CJ be used in a single-supply configuration with V− tied to ground?

Yes, the DG442CJ can operate in single-supply mode by connecting V− to ground (0V) and applying +10V to +30V to V+. In this configuration, the analog signal range extends from 0V to V+ − 0.5V (e.g., 0V to +11.5V with +12V supply), and specifications such as r_DS(ON) (100Ω max), charge injection (10pC max), and off-leakage (<5nA at +85°C) remain valid. The DG442CJ's datasheet explicitly confirms single-supply operation and provides dedicated electrical characteristics for this mode.

What is the thermal performance of the DG442CJ in the 16-pin plastic DIP package?

In the 16-pin plastic DIP package, the DG442CJ has a continuous power dissipation rating of 842mW at +70°C ambient, with a derating factor of 10.53mW/°C above that temperature. Its junction-to-ambient thermal resistance (θ_JA) is approximately 119°C/W. This thermal profile supports reliable operation in convection-cooled industrial enclosures, and the DG442CJ's low 1.65mW typical power consumption further minimizes self-heating during normal switching duty cycles.

Is the DG442CJ pin-compatible with the original industry-standard DG442?

Yes, the DG442CJ is a plug-in upgrade for the legacy DG442 and maintains identical pinout, footprint, and logic behavior. Maxim's redesign retains the same 16-pin DIP configuration, terminal assignments (IN1–IN4, S1–S4, D1–D4, V+, V−, GND, N.C.), and NO (normally open) functionality. Key improvements - including 4Ω r_DS(ON) matching and <5nA off-leakage at +85°C - are implemented without altering mechanical or electrical interface requirements for the DG442CJ.