DG441CY+ - Quad SPST 85Ω Analog Switch | Analog Devices
MPN: DG441CY+ ✓ ActiveDG441CY+ Overview
An analog switch is a solid-state semiconductor device that uses control logic to connect or disconnect signals without mechanically moving electrical contacts. The DG441 belongs to the analog switch and multiplexer hierarchy: analog switch IC, multiplexer/demultiplexer IC, interface IC, and integrated circuit. Compared with mechanical relays, an integrated analog switch can operate faster, consume less space, and avoid mechanical contact wear, although its voltage and current ratings remain more restrictive.
The manufacturer data sheet identifies four independent SPST switches, on-resistance matching of no more than 4 Ω, on-resistance flatness of no more than 9 Ω across the signal range, and equal conduction behavior in either direction. It also specifies low charge injection of no more than 10 pC, low power consumption of 1.65 mW, and ESD tolerance of at least 2,000 V. The distributor listing identifies the DG441CY+ as a 4-circuit, 1:1 switch with 85 Ω maximum on-resistance in a 16-SOIC package.
The SPST topology provides one signal path per switch, while the normally closed state establishes the conduction path before a control input changes state. This makes the device useful for controlled grounding, signal isolation, test-point routing, sample-and-hold paths, and peripheral selection. The low on-resistance matching and flatness reduce gain or timing errors when multiple channels must conduct with consistent resistance.
Typical uses include test and measurement systems, data-acquisition equipment, battery-powered instruments, audio and communications equipment, and industrial control systems. The compact 16-SOIC package simplifies board integration, while the quad-channel configuration can implement several switched signal paths in one device. System designers should still verify signal amplitude, bandwidth, leakage, control logic levels, and switch lifetime against the manufacturer data sheet.
The principal design consideration is off-state isolation. Although the normally closed switches provide a defined default path, leakage and capacitance can still couple adjacent signals. Keep sensitive routing paths short, use an appropriate ground reference, and control the switches with logic levels compatible with the supply voltage. This page combines verified manufacturer and distributor information, package details, comparison data, and practical replacement guidance for engineers evaluating the DG441CY+.
Drop-in alternatives for DG441CY+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DG441CY+ (same form factor and footprint) — differing in ESD Tolerance, Maximum On-Resistance, Number of Switches, Package, Switch Configuration.
DG441DY+
✅ Drop-InContact for price
View Datasheet →DG441CY+ Maximum Ratings & Electrical Characteristics
| Product Type | Quad SPST analog switch IC |
| Number of Switches | 4 switches |
| Switch Configuration | 1:1 multiplexer/demultiplexer |
| Contact Type | SPST normally closed |
| Maximum On-Resistance | 85 Ω |
| On-Resistance Matching | 4 Ω maximum |
| On-Resistance Flatness | 9 Ω maximum over the signal range |
| Charge Injection | 10 pC maximum |
| Power Consumption | 1.65 mW |
| ESD Tolerance | 2,000 V minimum |
| Bidirectional Conduction | Equal conduction in either direction |
| Package | 16-pin narrow SOIC |
| Mounting Type | Surface mount |
| RoHS Status | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
DG441CY+ 16-pin narrow soic Pin Configuration Guide
Pin configuration for DG441CY+ (16-pin narrow soic package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for DG441CY+.
Refer to the datasheet for full pin configuration.
Typical Applications
DG441CY+ is suitable for 6 applications: Data Acquisition Signal Routing, Battery-Powered Test Instruments, Audio Signal Selection, Communications Interface Isolation, Industrial Control Signal Multiplexing, Automated Test Fixture Routing.
Data Acquisition Signal Routing
The DG441CY+ fits data-acquisition front ends that require several independently controlled analog paths. Its four SPST switches occupy one 16-pin narrow SOIC package, while the distributor specification identifies a 1:1 configuration and 85 Ω maximum on-resistance. Using one device can reduce routing complexity when a sensor or reference signal must be connected to different acquisition channels. The on-resistance matching within 4 Ω and flatness within 9 Ω help limit channel-dependent attenuation variation. Designers should still account for off-state leakage, control timing, and the normally closed resting path before finalizing the input architecture.
Recommended
Battery-Powered Test Instruments
The DG441CY+ is appropriate for compact, battery-powered test instruments where four SPST signal paths must be switched in a limited board area. The manufacturer data sheet specifies low power consumption of 1.65 mW, while the integrated quad arrangement avoids four separate single-switch packages. A normally closed path can define the default connection for a measurement input or safe-state reference. Because no high-current rating is supplied in the verified excerpts, the device should primarily handle low-level measurement signals. Validate control-logic levels, leakage over the intended temperature range, and the effect of the 85 Ω maximum on-resistance on source impedance.
Recommended
Audio Signal Selection
The DG441CY+ can route low-level audio signals in test equipment or source-selection circuits where four independently controlled paths are useful. Its equal conduction in either direction permits flexible signal orientation, and the 4 Ω maximum on-resistance matching reduces gain variation between channels. The 16-pin narrow SOIC package supports compact analog boards, while the 10 pC maximum charge-injection figure helps limit control-transition disturbance. Care is still required around very low-noise and wideband audio nodes because switch resistance, leakage, capacitance, and clocking edges can affect distortion and channel isolation.
Recommended
Communications Interface Isolation
The DG441CY+ is suitable for communications equipment that needs to isolate or cross-connect several low-voltage interface lines. Four independent SPST switches provide flexible routing in a single 16-SOIC device, and bidirectional conduction supports signal paths that do not have a fixed source and destination. The manufacturer-reported 2,000 V minimum ESD tolerance adds useful protection margin, although it does not replace system-level surge protection. Engineers should verify signal bandwidth, off-state capacitance, leakage, and control logic against the communication standard implemented by the host equipment.
Recommended
Industrial Control Signal Multiplexing
The DG441CY+ can multiplex control or diagnostic signals in industrial systems where multiple low-voltage nodes must share a downstream resource. Its quad SPST organization allows four paths to be selected independently, while the specified 85 Ω maximum on-resistance provides a defined series resistance for typical control-level signals. The normally closed configuration can also establish a default route during reset. Industrial qualification details and extended-temperature limits were not present in the verified excerpts, so the operating environment must be checked against the manufacturer documentation before deployment in safety-related or high-temperature equipment.
Recommended
Automated Test Fixture Routing
The DG441CY+ fits automated test fixtures that require several stimulus or return paths to be switched with a defined default state. Four SPST channels in one 16-SOIC package simplify routing and reduce board area, while the controlled on-resistance matching and flatness improve consistency across repeated measurements. The normally closed behavior is useful when a default connection is required before the fixture controller asserts its command. Test engineers must account for the switch resistance in the measurement path, check leakage for high-impedance nodes, and keep the analog route physically separated from noisy digital and switching circuitry.
Recommended
Recommended Products Summary
Engineering reference data for DG441CY+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DG441DY+ |
|---|---|---|
| Package | 16-pin narrow SOIC | 16-pin narrow SOIC |
| Brand | Analog Devices | Analog Devices |
| Number of Switches | 4 switches | 4 switches |
| Switch Type | SPST normally closed | SPST normally closed |
| Multiplexer Configuration | 1:1 | 1:1 |
| On-Resistance Matching | 4 Ω maximum | 4 Ω maximum |
| Charge Injection | 10 pC maximum | 10 pC maximum |
| Power Consumption | 1.65 mW | 1.65 mW |
| Lifecycle Status | Active | Active |
Key Differentiators
- Four integrated normally closed channels (vs DG441DY+)
- Defined channel resistance variation (vs DG441DY+)
- Low switching disturbance and consumption (vs DG441DY+)
Design Notes
Route each switched signal on a compact trace and keep the analog package away from switching nodes, clock edges, and high-current return paths. The verified on-resistance matching of 4 Ω maximum and flatness of 9 Ω maximum can reduce channel variation, but PCB leakage and coupling can still dominate at high source impedances. Use a ground reference appropriate to the signal amplitude and avoid placing sensitive routes directly beneath digital or power-conversion circuitry.
Include the maximum 85 Ω on-resistance when calculating divider attenuation, source impedance, and settling behavior. Account for the normally closed resting path and the 10 pC maximum charge injection when control transitions must not disturb a sampled or held signal. For high-frequency paths, verify the manufacturer's off capacitance, bandwidth, and isolation data from the official DG441-DG442 data sheet because those values were not included in the supplied excerpts.
Do not treat the DG441CY+ as a power switch or load relay. The supplied material does not establish a high-current or high-voltage switching rating, so it should remain within the manufacturer's signal-switching limits. Also confirm control polarity, supply requirements, and the specific terminal assignments in the official package drawing before assembling a DG441DY+ replacement into an existing PCB.
Compliance Information
The supplied verified excerpts do not provide definitive compliance declarations for the exact DG441CY+ orderable suffix. Obtain the current Analog Devices product-compliance documentation before asserting RoHS, REACH, lead-free, halogen-free, or conflict-minerals compliance.
