Analog Devices Inc./Maxim Integrated DG419DY+T

Overview

DG419DY+T from Maxim Integrated is a precision SPDT analog switch with guaranteed 3Ω max on-resistance matching, 4Ω max on-resistance flatness, and <5nA off-leakage at +85°C. It operates from ±4.5V to ±20V bipolar or +10V to +30V single supply, supports rail-to-rail signal handling, and delivers <175ns turn-on time. Used in audio routing, test equipment, and battery-operated systems requiring low charge injection (10pC max) and high ESD tolerance (2000V min).

For engineers reviewing the DG419DY+T datasheet, DG419DY+T pinout, DG419DY+T application, or DG419DY+T equivalent, key selection criteria include guaranteed R_DS(ON) match between SPDT channels, bipolar/single-supply flexibility, low temperature drift of leakage current, and compatibility with TTL/CMOS logic levels at VL = 5V.

Technical Context

The DG419DY+T implements a monolithic CMOS SPDT switch architecture with separate normally closed (S1) and normally open (S2) source terminals controlled by a single digital input (IN). Its silicon-gate 44V process enables operation across wide supply ranges while maintaining guaranteed on-resistance matching and flatness only under bipolar-supply conditions.

Charge injection is minimized via matched transistor geometry and layout symmetry, yielding ≤10pC typical across the full analog range. Off-isolation rejection ratio reaches 68dB at 1MHz, and break-before-make timing ensures no signal shorting during channel switching - critical for sample-and-hold and multiplexed sensor interfaces.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount, body width 3.9mm, lead pitch 1.27mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRMZ and TS5A23157DCUR, the DG419DY+T uniquely balances wide supply range (±4.5V to ±20V), guaranteed 3Ω R_DS(ON) match, and industrial-temperature leakage performance - making it the preferred choice for DC-precision, multi-rail test and control systems where voltage headroom and channel consistency are non-negotiable.

Availability

DG419DY+T is available at Aetrix Electronics and suitable for test equipment multiplexing, battery-operated modems, and sample-and-hold circuits requiring stable component supply across extended temperature and voltage ranges.

Supply support for DG419DY+T 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 DG419DY+T belongs to Maxim's precision analog switch family engineered for DC-accurate signal routing in demanding environments - emphasizing guaranteed matching, low leakage, and robust operation across wide supply and temperature ranges.

FAQ

What supply voltage ranges does the DG419DY+T support?

The DG419DY+T supports bipolar supplies from ±4.5V to ±20V and single supplies from +10V to +30V. When using a single supply, connect V− to ground. The device's 44V silicon-gate process enables reliable operation across this full range, with analog signal handling extending from V− to V+ in all configurations. DG419DY+T performance specifications such as R_DS(ON) match and flatness are guaranteed only under bipolar-supply conditions.

How does the DG419DY+T achieve guaranteed 3Ω on-resistance matching between S1 and S2?

The DG419DY+T achieves guaranteed 3Ω R_DS(ON) matching through matched transistor sizing, symmetric layout, and process trimming validated across temperature and voltage extremes. This specification is tested and guaranteed for devices operating with bipolar supplies (e.g., ±15V) and applies specifically to the S1 and S2 channels relative to the common drain D. DG419DY+T's matching performance is independent of external resistor networks and requires no calibration.

Is the DG419DY+T pin-compatible with older DG419 variants like DG419DJ or DG419CJ?

Yes, the DG419DY+T shares identical 8-pin SOIC pinout and electrical behavior with other DG419 variants including DG419DJ and DG419CJ. All share the same pin functions (S1, S2, D, V+, V−, GND, VL, IN), thermal characteristics, and switching timing. The "DY" suffix denotes −40°C to +85°C operation in SOIC package, making DG419DY+T a direct replacement for DG419DJ in industrial applications requiring extended temperature range.

What is the maximum allowable voltage difference between V+ and V− for the DG419DY+T?

The DG419DY+T has an absolute maximum V+–V− rating of 44V. This limit is independent of individual rail voltages - for example, V+ = +24V and V− = −15V (39V difference) is within specification, while V+ = +30V and V− = −20V (50V difference) exceeds it. Exceeding 44V risks permanent damage. DG419DY+T's guaranteed parameters (e.g., R_DS(ON), leakage) are specified up to ±20V supplies, corresponding to a 40V difference.

Can the DG419DY+T be used with 3.3V logic control signals?

No - the DG419DY+T requires VL to be set to either +5V (for TTL compatibility) or tied to V+ (for CMOS-level compatibility). Its logic input threshold is referenced to VL, and 3.3V signals applied directly to IN will not reliably drive the switch when VL = 5V. To interface with 3.3V microcontrollers, use a level shifter or configure VL = V+ and ensure V+ ≥ 4.5V so that 3.3V meets the minimum VIH requirement (0.7 × VL). DG419DY+T does not support native 3.3V logic supply.