Analog Devices Inc./Maxim Integrated DG418CY+

Overview

DG418CY+ from Maxim Integrated is a precision CMOS single-pole/single-throw (SPST) analog switch with normally open configuration, 35Ω maximum on-resistance, <5nA off-leakage at +85°C, and 175ns max turn-on time. It operates from ±4.5V to ±20V bipolar or +10V to +30V single supply and is used in audio signal routing, test equipment, and battery-operated systems requiring rail-to-rail signal handling.

For engineers reviewing the DG418CY+ datasheet, DG418CY+ pinout, DG418CY+ application, or DG418CY+ equivalent, key selection criteria include guaranteed on-resistance matching (3Ω max), low charge injection (10pC max), ESD tolerance (2000V min), and compatibility with TTL/CMOS logic levels across industrial temperature range.

Technical Context

The DG418CY+ implements a silicon-gate CMOS architecture optimized for low distortion and minimal signal-dependent resistance variation. Its on-resistance flatness is guaranteed at ≤4Ω over the full analog signal range under bipolar supply operation, and it maintains rail-to-rail conduction without signal clipping.

Switch control uses a single logic input referenced to VL (typically +5V), enabling direct interface with TTL or CMOS drivers. Internal protection diodes clamp input signals exceeding V+ or V−, and the device guarantees low power consumption (≤35µW) with supply currents below 0.1µA at +25°C.

Key Specifications

Pinout & Package

Package: 8-pin SO (Small Outline) - surface-mount, RoHS-compliant, 150°C reflow compatible, footprint matches industry-standard SOIC-8.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRMZ and TS5A23157DGSR, the DG418CY+ uniquely combines SPST NO topology, ±20V bipolar operation, and guaranteed on-resistance matching - making it irreplaceable in legacy test equipment upgrades and high-voltage signal routing where supply flexibility and channel matching are non-negotiable.

Availability

DG418CY+ is available at Aetrix Electronics and suitable for audio signal routing, test equipment, and battery-operated systems requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature range.

Supply support for DG418CY+ 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 automotive markets.

The DG418CY+ belongs to Maxim's precision analog switch family, designed specifically for applications demanding low distortion, rail-to-rail signal handling, and robust operation across wide supply and temperature ranges.

FAQ

What is the operating temperature range for DG418CY+?

The DG418CY+ is rated for 0°C to +70°C operation. This commercial-grade temperature range is confirmed in the Ordering Information table and applies specifically to the CY suffix variant. The device uses an 8-pin SO package and is intended for use in environments where ambient temperatures remain within this specified window, such as office-based test equipment and consumer audio systems. DG418CY+ does not support extended or military temperature grades.

Can DG418CY+ operate from a single +12V supply?

Yes, DG418CY+ supports single-supply operation from +10V to +30V. When using +12V, connect V− to ground, set VL to +5V for TTL compatibility, and ensure analog signals stay within 0V to +12V. The Electrical Characteristics table explicitly lists single-supply test conditions (V+ = +12V, V− = 0V), confirming full functionality including 35Ω R_DS(ON) and 175ns t_ON. No external level shifters are needed.

Is DG418CY+ pin-compatible with older DG418 variants?

Yes, DG418CY+ maintains identical pinout and electrical behavior with legacy DG418CJ and DG418C/D variants. All share the same 8-pin SO footprint, terminal functions (IN, S, D, V+, V−, GND, VL, N.C.), and truth table (IN high = switch closed). The "+" suffix denotes enhanced performance - including improved R_DS(ON) match and lower leakage - without altering mechanical or logical interface.

What is the maximum analog signal voltage DG418CY+ can handle?

DG418CY+ supports rail-to-rail analog signals from V− to V+. With ±15V supplies, the full signal range is −15V to +15V; with +12V single supply, it is 0V to +12V. Absolute maximum ratings permit V+ up to +44V and V− down to −44V relative to V−, but functional analog range is strictly bounded by the applied supply rails. Exceeding V+ or V− risks clamping and increased leakage.

Does DG418CY+ require external pull-up or pull-down resistors on the IN pin?

No, DG418CY+ has TTL/CMOS-compatible logic inputs with guaranteed switching thresholds (VINL ≤ 0.8V, VINH ≥ 2.4V) and input leakage below ±0.5µA. Driving IN directly from microcontroller GPIO or logic gates is sufficient. External resistors are unnecessary unless noise immunity in high-EMI environments demands added hysteresis - a design choice, not a requirement for basic operation of DG418CY+.