Analog Devices Inc./Maxim Integrated DG445CY

Overview

DG445CY 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, <5nA off-leakage at +85°C, 10pC max charge injection, and operates from ±4.5V to ±20V or +10V to +30V supplies - enabling use in battery-powered test equipment and rail-to-rail audio switching.

For engineers reviewing the DG445CY datasheet, DG445CY pinout, DG445CY application, or DG445CY equivalent, key selection criteria include guaranteed on-resistance matching (4Ω max between channels), low power consumption (35µW max), ESD tolerance (2000V min), and compatibility with TTL/CMOS logic levels via VL pin.

Technical Context

The DG445CY implements four independent SPST switches with complementary control logic: INx = logic high enables conduction between Dx and Sx. Its silicon-gate 44V process ensures robust operation across wide supply ranges and temperature extremes (0°C to +70°C).

Switching performance is characterized by tON < 250ns and tOFF < 70ns under ±16.5V supplies, while rail-to-rail analog signal handling (±15V range) and low crosstalk (100dB at 1MHz) support high-fidelity signal integrity in multiplexed measurement paths.

Key Specifications

Pinout & Package

Package: 16-pin narrow SO (Small Outline) - surface-mount compatible with standard PCB assembly processes and IPC-7351B footprint standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1414BRUZ and TS5A23157DGSR, the DG445CY uniquely balances wide supply flexibility (±4.5V to ±20V or +10V to +30V), robust ESD protection, and guaranteed channel matching - making it the preferred choice for industrial test gear requiring field-reliable, multi-range analog switching.

Availability

DG445CY is available at Aetrix Electronics and suitable for test equipment signal routing, audio signal multiplexing, sample-and-hold circuits, and military radio front-ends requiring stable component supply across extended temperature and voltage operating conditions.

Supply support for DG445CY 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DG445CY belongs to Maxim's legacy analog switch family engineered for precision signal routing in demanding environments - emphasizing low leakage, tight R_ON matching, and wide supply adaptability.

FAQ

What is the maximum analog signal range supported by the DG445CY?

The DG445CY supports an analog signal range of ±15V when operated with dual supplies (e.g., V+ = +15V, V− = −15V). This rail-to-rail capability allows full utilization of sensor or DAC output spans without external level shifting. The DG445CY maintains specified performance across this range, including guaranteed on-resistance flatness of 9Ω max, ensuring consistent signal fidelity regardless of input voltage position.

Does the DG445CY require a separate logic supply voltage?

Yes, the DG445CY requires a dedicated VL pin for logic interface. VL can be tied to +5V for TTL compatibility or to V+ for CMOS-level inputs - providing design flexibility without external translators. This feature ensures reliable switching even when analog supply rails differ significantly from logic thresholds, and is explicitly required for proper operation of the DG445CY's internal control circuitry.

Can the DG445CY operate from a single supply, and what are the limitations?

Yes, the DG445CY supports single-supply operation from +10V to +30V by connecting V− to GND. However, the analog signal range becomes 0V to (V+ − 1V) due to internal level-shifting constraints. For example, at V+ = +12V, the usable analog range is 0V to +11V. The DG445CY's electrical specifications - including R_DS(ON), leakage, and switching times - remain valid under these conditions per its single-supply characterization data.

What is the thermal performance of the DG445CY at elevated temperatures?

The DG445CY is rated for operation from 0°C to +70°C and guarantees off-leakage current of less than 5nA at +85°C - exceeding its rated range for margin assurance. On-resistance increases predictably with temperature, remaining below 160Ω at +85°C under unipolar 12V supply. The DG445CY's 16-pin narrow SO package provides adequate thermal dissipation for typical 35µW power consumption, with no derating needed below +70°C ambient.

How does the DG445CY handle electrostatic discharge events?

The DG445CY is rated for 2000V minimum ESD tolerance per Method 3015.7, verified through standardized human-body-model testing. This robustness stems from integrated protection diodes on all analog and digital pins, clamping transient voltages to safe levels relative to V+ and V−. The DG445CY's ESD resilience makes it suitable for benchtop test equipment and field-deployable systems where operator handling or environmental static poses reliability risks.