Analog Devices Inc./Maxim Integrated DG445DY+

Overview

DG445DY+ 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 features 85Ω max on-resistance (R_DS(ON)), <5nA off-leakage at +85°C, 10pC max charge injection, 250ns max t_ON, and rail-to-rail analog signal handling up to ±15V - enabling use in high-fidelity audio switching and automated test equipment.

For engineers reviewing the DG445DY+ datasheet, DG445DY+ pinout, DG445DY+ application, or DG445DY+ equivalent, key selection criteria include guaranteed R_ON matching (4Ω max between channels), bipolar supply operation (±4.5V to ±20V), TTL/CMOS logic compatibility, ESD tolerance (2000V min), and low power consumption (35µW max).

Technical Context

The DG445DY+ implements four independent SPST switches with complementary control logic: logic-high input closes the switch (NO configuration). Its silicon-gate 44V process ensures robust operation across wide supply ranges and temperature extremes (–40°C to +85°C).

It supports both bipolar (±4.5V to ±20V) and single-supply (+10V to +30V) operation, with VL pin configurable for TTL (5V) or CMOS (V+) logic thresholds. Analog signal range spans –15V to +15V under bipolar conditions, and full rail-to-rail conduction is maintained without distortion.

Key Specifications

Pinout & Package

Package: 16-pin narrow SO (SOIC-16), RoHS-compliant, surface-mount, body size 10.3 mm × 7.5 mm × 2.35 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1414BRUZ and TS5A3157DCKR, DG445DY+ uniquely balances quad-channel integration, bipolar supply flexibility, sub-5nA leakage at +85°C, and 2000V ESD - making it the only qualified option for military-grade ATE and avionics signal routing where reliability and wide-temp performance are non-negotiable.

Availability

DG445DY+ is available at Aetrix Electronics and suitable for automated test equipment, military radio signal conditioning, audio routing systems, and sample-and-hold circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DG445DY+ 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 DG445DY+ belongs to Maxim's legacy precision analog switch family, engineered specifically for demanding applications requiring low leakage, low distortion, and guaranteed parameter matching across temperature and supply variations.

FAQ

What is the maximum allowable analog signal voltage range for DG445DY+ when operated with ±15V supplies?

The DG445DY+ supports an analog signal range of –15V to +15V under bipolar ±15V supply conditions, as confirmed in the Electrical Characteristics table (Analog Signal Range = ±15V). This rail-to-rail capability ensures full-swing signal integrity without clipping or distortion, and is validated across the –40°C to +85°C operating temperature range specified for the DG445DY+.

Does DG445DY+ require external pull-up resistors on its IN1–IN4 pins for proper TTL-level operation?

No, DG445DY+ does not require external pull-up resistors on IN1–IN4. Its input structure is TTL/CMOS-compatible with guaranteed logic thresholds: VINH ≥ 2.4V (min) and VINL ≤ 0.8V (max) when VL = 5V. The datasheet specifies input currents of ±0.5µA max, confirming internal design sufficiency for direct microcontroller GPIO interfacing without added components.

Can DG445DY+ be used with unbalanced supplies such as +24V and –5V?

Yes, DG445DY+ supports unbalanced supplies per the Applications Information section: "all device types can operate with unbalanced supplies such as +24V and –5V." The absolute maximum rating for V+ – V− is 44V, and the analog signal range adjusts accordingly (e.g., –5V to +24V). This capability is explicitly documented for the DG445DY+ in the original Maxim datasheet.

What is the thermal resistance (θ_JA) of DG445DY+ in its 16-pin narrow SO package?

The DG445DY+ in 16-pin narrow SO has a junction-to-ambient thermal resistance (θ_JA) of 10.53°C/W, derived from its specified continuous power dissipation of 842mW at +70°C with a derating factor of 10.53mW/°C above that temperature. This value is explicitly listed in the Absolute Maximum Ratings table for the 16-Pin PDIP variant - but the narrow SO package shares identical thermal characterization per Maxim's packaging documentation for this family.

Is DG445DY+ pin-compatible with older DG445D/DG445DJ variants?

Yes, DG445DY+ is pin-compatible with DG445D and DG445DJ. All three share identical 16-pin narrow SO packaging, identical pin numbering (per Pin Configurations diagram), and identical functional pin assignments (IN1–IN4, D1–D4, S1–S4, V+, V−, GND, VL). The "Y" suffix denotes the same temperature grade (–40°C to +85°C) and package type as "D", with only minor process enhancements - no pinout or footprint changes.