Analog Devices Inc./Maxim Integrated DG403CY

Overview

DG403CY from Maxim Integrated is a dual, single-pole/double-throw (SPDT) high-speed analog switch with two normally open and two normally closed channels, 20Ω typical on-resistance, 150ns max tON, and ±4.5V to ±20V bipolar or +10V to +30V single-supply operation - used in precision sample-and-hold circuits and audio signal routing where low charge injection (15pC max) and rail-to-rail signal handling are critical.

For engineers reviewing the DG403CY datasheet, DG403CY pinout, DG403CY application, or DG403CY equivalent, key selection criteria include guaranteed on-resistance matching (2Ω max), off-leakage <5nA at +85°C, break-before-make delay (10–20ns), TTL/CMOS logic compatibility, and 16-pin plastic DIP package suitability for through-hole test equipment and military radio interfaces.

Technical Context

The DG403CY implements dual SPDT switching using silicon-gate CMOS process technology, supporting bidirectional analog conduction with rail-to-rail signal range (±15V typical). Its control architecture accepts TTL/CMOS-level inputs referenced to VL = +5V while operating from independent analog supplies (V+, V−).

Each channel features matched on-resistance (ΔrDS(ON) ≤ 2Ω) and flat on-resistance over signal range (rFLAT(ON) ≤ 3Ω), enabling precise gain-matching in multiplexer-based instrumentation. Break-before-make timing prevents signal shorting during state transitions, critical in guidance and control systems.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (0°C to +70°C operating range), through-hole mount, 0.3-inch width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG403BRZ and TS5A23157DCUR, the DG403CY uniquely supports ±15V rail-to-rail analog signals with guaranteed 2Ω on-resistance matching and <5nA hot-temperature leakage - making it irreplaceable in military radios and guidance systems where supply headroom and thermal stability are non-negotiable.

Availability

DG403CY is available at Aetrix Electronics and suitable for test equipment, guidance and control systems, and audio signal routing requiring stable component supply across extended temperature validation cycles and long-lifecycle production programs.

Supply support for DG403CY 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 precision analog, mixed-signal, and high-reliability ICs for industrial, automotive, and defense applications.

The DG403CY belongs to Maxim's legacy high-speed analog switch family, engineered for demanding signal-routing tasks in military radios, PBX systems, and battery-operated instrumentation where rail-to-rail operation and thermal leakage stability are essential.

FAQ

What is the maximum analog signal voltage range supported by the DG403CY?

The DG403CY supports analog signals from V− to V+, with guaranteed operation across ±15V when powered from ±15V supplies. Absolute maximum ratings allow V+ − V− up to 44V, but signal range remains bounded by the applied supply rails. This rail-to-rail capability eliminates level-shifting circuitry in DG403CY-based designs for heads-up displays and communications systems.

Does the DG403CY require a separate logic supply, and what voltage is needed?

Yes, the DG403CY requires VL = +5V for TTL-compatible logic inputs. The VL pin must be decoupled to GND and cannot be tied to V+ unless V+ = +5V. This allows independent scaling of analog and logic domains - a key feature enabling DG403CY integration into systems with ±15V analog rails and +5V digital control buses.

How does the break-before-make timing of the DG403CY prevent signal corruption?

The DG403CY guarantees 10–20ns break-before-make delay between complementary switch pairs (e.g., S1/D1 and S1/D2), ensuring the normally open and normally closed paths never conduct simultaneously. This prevents momentary shorts in guidance and control systems where DG403CY routes redundant sensor outputs, preserving system integrity during state transitions.

Can the DG403CY operate from a single +24V supply, and how does that affect signal range?

Yes, the DG403CY operates from +10V to +30V single supply. With V+ = +24V and V− = 0V, the analog signal range becomes 0V to +24V - fully rail-to-rail. GND serves as the reference, and VL must still be +5V. This configuration is widely used in DG403CY-based PBX and battery-operated systems where negative supply generation is impractical.

What is the thermal performance of DG403CY leakage current at elevated temperatures?

The DG403CY guarantees off-leakage current <5nA at +85°C for both source and drain terminals - a 5× improvement over earlier DG403 variants. At +25°C, leakage is typically <0.5nA. This stability enables DG403CY deployment in military radios and avionics where sustained operation above 70°C must not degrade signal integrity in high-impedance sample-and-hold nodes.