DG442DJ+ - Quad SPST 85Ω Analog Switch | Vishay Intertechnology
N.º de pieza: DG442DJ+ ✗ Fin de vidaDG442DJ+ Descripción general
An analog switch is a semiconductor-controlled routing component that connects or disconnects analog signal paths. The DG442DJ belongs to the monolithic CMOS analog-switch hierarchy, where SPST describes one switch path per circuit and quad describes four independent channels. Unlike a multiplexer, each DG442 channel can operate independently rather than sharing a common internal signal path.
Key features include four independent SPST switch circuits, an 85 Ω on-resistance, and 1:1 signal routing. The package is a 16-pin PDIP, allowing through-hole assembly and straightforward prototyping. The available product information identifies the DG441 and DG442 families as drop-in replacements for the popular DG201A and DG202 series, which helps engineers evaluate PCB reuse and upgrade paths.
Internally, the DG442 uses a monolithic CMOS implementation to provide consistent switching behavior across the four channels. Each channel has a corresponding control input and common ground and power connections. Designers should consult the manufacturer datasheet for the exact control truth table, input and supply limits, switching timing, off-impedance, leakage, and absolute maximum ratings before finalizing a design.
Typical uses include analog test systems, instrumentation, signal-conditioning modules, data-acquisition equipment, and industrial control circuits where multiple analog paths must be routed independently. Its four-channel arrangement can reduce component count when a design needs four SPST functions rather than four separate single switch packages.
The primary design consideration is confirming that the DG442DJ+ control polarity and timing satisfy the receiving circuit. Because the verified source data does not provide a complete pin table, engineers should verify every connection against the manufacturer datasheet before PCB release. Input signals must also remain within the specified voltage limits.
This page consolidates verified distributor information, compatible replacement data, package details, selection guidance, and practical design notes into one engineering-focused resource for the DG442DJ+.
Alternativas directas para DG442DJ+ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con DG442DJ+ (mismo factor de forma y huella) — difiere en Switch Configuration.
DG442DJ-E3
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
DG445DJ+
✅ Sustitución directaConsulte el precio
Ver hoja de datos →ADG442BNZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ALD4202MPCL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
DG442DJ+ Valores máximos y características eléctricas
| Switch Configuration | 4 independent SPST circuits |
| Number of Channels | 4 circuits |
| On-Resistance | 85 ohm |
| Signal-to-Noise Ratio | 1:1 |
| Technology | Monolithic CMOS |
| Encapsulado | 16-pin PDIP |
| Tipo de montaje | Through-hole |
| Rango de temperatura de funcionamiento | 0 C to +70 C |
| Logic Compatibility | TTL and CMOS compatible |
| Control Inputs | 4 control inputs |
| Legacy Compatibility | Drop-in replacement for DG201A and DG202 series devices |
Guía de configuración de pines de DG442DJ+ 16-pin pdip
Configuración de pines para DG442DJ+ (encapsulado 16-pin pdip). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para DG442DJ+.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
DG442DJ+ es adecuado para 6 aplicacións: Analog Test and Measurement Systems, Data Acquisition Signal Conditioning, Industrial Control Signal Routing, Audio Signal Path Switching, Legacy DG201A and DG202 Board Upgrade, Precision DC Signal Routing.
Analog Test and Measurement Systems
The DG442DJ+ fits instrumentation that routes four analog signals independently, with its quad-SPST architecture providing four switch functions in one 16-pin PDIP package. The documented 85 Ω on-resistance is suitable for many general-purpose signal paths where insertion resistance does not dominate measurement accuracy. Using four integrated channels can reduce board area and component count, while TTL- and CMOS-compatible control inputs simplify interfacing with test controllers. Because the verified data does not provide leakage, charge-injection, switching-time, or input-voltage limits, engineers should verify those parameters before using the device in precision measurement front ends.
Recomendado
Data Acquisition Signal Conditioning
The DG442DJ+ can route sensor or conditioning signals in a multi-channel acquisition system because it provides four independent SPST paths and an 85 Ω on-resistance. Independent control allows each channel to be connected or disconnected according to the measurement sequence, while the 16-pin PDIP format simplifies through-hole prototyping and repair. The trade-off is that the supplied data confirms only a 0 C to +70 C operating range, so enclosure temperature, source impedance, and leakage-induced errors must be considered. Designers should also confirm the permitted analog voltage range and switching-time limits in the manufacturer datasheet.
Recomendado
Industrial Control Signal Routing
The DG442DJ+ is appropriate for non-extreme industrial control boards that need to connect or isolate several low-frequency analog control paths. Its four independent SPST switches can replace multiple single-channel packages, while the 85 Ω on-resistance provides a documented basis for initial signal-loss estimation. The through-hole PDIP package also supports prototype and repair workflows. However, the verified 0 C to +70 C rating limits use in hot industrial environments, and the source data does not establish surge, isolation, or safety ratings. A replacement should be selected only after verifying transient voltages and environmental requirements.
Recomendado
Audio Signal Path Switching
The DG442DJ+ can implement channel selection or mute functions in modest audio systems because it offers four independent SPST paths with an 85 Ω on-resistance. Its monolithic CMOS implementation and TTL- and CMOS-compatible controls permit straightforward digital control from common logic families. Audio designers must account for insertion loss, off-impedance, leakage, and switching transients, none of which are quantified in the supplied source excerpt. The device should therefore be treated as a general-purpose routing element rather than automatically suitable for low-noise or high-fidelity audio without validation against the full datasheet and the target source impedance.
Recomendado
Legacy DG201A and DG202 Board Upgrade
The DG442DJ+ is explicitly presented as part of the DG441 and DG442 family of drop-in replacements for the popular DG201A and DG202 series, making it relevant to legacy board modernization. The 16-pin PDIP package supports a direct replacement strategy when pin assignments, control polarity, and electrical limits match. The provided source does not include the exact legacy-to-modern parameter changes, so engineers should compare revision-controlled datasheets and inspect whether loads, control signals, or supply rails changed. This comparison is essential because a family-level compatibility statement does not replace a complete worst-case electrical review.
Recomendado
Precision DC Signal Routing
The DG442DJ+ may be used to connect and isolate precision DC signals when the application can tolerate the documented 85 Ω on-resistance and when off-leakage and thermal effects meet the error budget. Four independently controlled SPST channels make it useful for switched-reference or programmable-path arrangements. The verified excerpts do not specify off-leakage current, charge injection, input bias current, or common-mode performance, all of which can dominate DC accuracy. Engineers should therefore calculate the total resistance divider and leakage error and confirm the complete electrical limits from the manufacturer datasheet before deployment.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para DG442DJ+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | DG442DJ-E3 | DG445DJ+ | ADG442BNZ | ALD4202MPCL |
|---|---|---|---|---|---|
| Package | PDIP-16 | PDIP-16 | PDIP-16 | PDIP-16 | PDIP-16 |
| Brand | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Analog Devices | Microchip Technology |
Diferenciadores clave
- Established legacy-family replacement path (frente a DG442DJ-E3)
- Documented 85 ohm on-resistance (frente a ADG442BNZ)
- Four independent SPST circuits in one package (frente a ALD4202MPCL)
- TTL- and CMOS-compatible controls (frente a DG445DJ+)
Notas de diseño
Do not approve a DG442DJ+ replacement from package compatibility alone. Verify the control truth table, control-input thresholds, power rails, analog signal limits, off leakage, charge injection, and switching time against the manufacturer datasheet. The verified source establishes a four-channel SPST architecture and 85 Ω on-resistance, but it does not provide the complete pin table or absolute maximum ratings.
Place the switch close to the signal source and destination to minimize PCB capacitance and susceptibility to injected noise. Keep analog traces away from high-current switching nodes, provide a stable ground reference, and use the complete datasheet grounding recommendations. Account for the 85 Ω on-resistance when calculating divider error and consider add-on amplifier input bias current where the switch is placed directly at a high-impedance node.
Determine each switched path’s worst-case current from the complete datasheet limits rather than assuming that the 85 Ω value applies without qualification. Include on-state dissipation, source current, control-signal current, and system supply requirements in the power budget. The verified excerpts do not state supply-voltage limits or absolute maximum current ratings, so those values must be obtained before schematic release.
The source results contain both Vishay Siliconix and Analog Devices/Maxim Integrated listings for DG442DJ, while another result describes the device as obsolete with remaining inventory. Do not mix legacy Intersil, Vishay, Maxim, or ADI documentation without checking revision and qualification status. Procurement should require the exact DG442DJ+ suffix, manufacturer, condition, and traceable lot information.
Información de cumplimiento
The verified web results do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for DG442DJ+. Compliance must be confirmed using the current manufacturer product page or material declaration.