MAX4854HETE+ - 9Ω Quad SPST Analog Switch | Analog Devices
Référence : MAX4854HETE+ ✓ ActifMAX4854HETE+ Présentation
An analog switch is a semiconductor device that connects or isolates signal paths under digital control. The MAX4854 belongs to the analog switch and multiplexer hierarchy, where each controlled contact provides independently selectable routing for sensors, test equipment, communication interfaces, and mixed-signal systems. Unlike a mechanical relay, it changes state electronically and without mechanical switching delay, although its behavior still depends on the applied control voltage and signal amplitude.
The device integrates four SPST switches with a 1:1 signal configuration. Its specified 9Ω on-resistance, 150 MHz bandwidth, and 27.5 pF input capacitance make it suitable for high-speed analog signal paths where capacitive loading must be controlled. Switching characteristics include 30 ns operation in the JLCPCB specification, 40 ns turn-off performance, and 900 ps transition timing in the listed technical data.
Over-rail signal handling is the key architectural feature for this product family. It allows the switched signal to operate beyond the normal supply range under the conditions specified by the manufacturer, which is useful in industrial systems where an input can remain active while the control or supply rail changes. The 2 V to 5.5 V supply range supports both lower-voltage portable systems and conventional 5 V industrial equipment.
Typical uses include test-and-measurement signal routing, industrial data acquisition, sensor-interface switching, protection isolation, and communication-interface signal conditioning. The four independent channels can reduce the number of discrete switch packages required when a design routes several related signals or provides protected paths for external connections.
When laying out the MAX4854HETE+, place the exposed pad on a solid, low-impedance ground plane and keep input and output traces short. Confirm that trace capacitance, connector loading, and downstream input capacitance remain compatible with the 27.5 pF device capacitance. Control signals should be driven with clean levels that satisfy the manufacturer’s input thresholds.
This product page combines the manufacturer’s electrical characteristics with package-level engineering guidance, application fit, and verified drop-in alternatives. It helps engineers assess bandwidth, capacitance, voltage range, switching speed, thermal layout, and PCB footprint before integrating the MAX4854HETE+ into a signal-routing design.
Alternatives de remplacement direct pour MAX4854HETE+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MAX4854HETE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX4854HETE+T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX4854HETE+ Valeurs maximales et caractéristiques électriques
| Number of Circuits | 4 circuits |
| Switch Configuration | 1:1 |
| Switch Type | SPST |
| On Resistance | 9 ohm |
| Signal Bandwidth | 150 MHz |
| Capacité d'entrée | 27.5 pF |
| Supply Voltage Range | 2 V to 5.5 V |
| Plage de température de fonctionnement | -40°C to +85°C |
| Turn-On Time | 60 ns |
| Turn-Off Time | 40 ns |
| Switching Time | 30 ns |
| Transition Time | 900 ps |
| Off Isolation | 80 dB |
| Leakage Current | 2 nA |
| Boîtier | 16-pin TQFN with exposed pad, 3 mm × 3 mm |
| Nombre de broches | 16 pins |
| Type de montage | Surface mount |
| Statut RoHS | Compliant |
| Tension d'alimentation | 3 V |
Guide de configuration des broches du MAX4854HETE+ 16-pin tqfn with exposed pad, 3 mm × 3 mm
Configuration des broches du MAX4854HETE+ (boîtier 16-pin tqfn with exposed pad, 3 mm × 3 mm). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour MAX4854HETE+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MAX4854HETE+ convient pour 6 applications: Industrial Data Acquisition, Test and Measurement Signal Routing, Sensor Interface Switching, Communication Interface Protection, Battery-Powered Portable Equipment, High-Speed Digital Signal Gating.
Industrial Data Acquisition
The MAX4854HETE+ fits industrial acquisition systems that must select or isolate several incoming analog channels. Its four SPST paths provide independent routing in a single 16-pin TQFN package, while the 9Ω on-resistance and 150 MHz bandwidth support signals well beyond conventional sensor-bandwidth requirements. The 2 V to 5.5 V operating range supports both 3 V and 5 V equipment. Designers should account for the 27.5 pF input capacitance when driving high-impedance sources and use short, guarded routing to prevent the switch capacitance from creating an unintended RC low-pass response.
Recommandé
Test and Measurement Signal Routing
The MAX4854HETE+ is appropriate for bench and production-test equipment that routes one source to multiple destinations. Its 150 MHz bandwidth, 30 ns switching time, and four SPST channels allow rapid path selection without allocating a separate mechanical relay to every signal. The 80 dB off-isolation specification helps suppress feedthrough between paths. Layout quality remains important: maintain a continuous ground reference, place the exposed pad directly on a thermal and electrical ground plane, and minimize loop area around the switched node to preserve pulse fidelity.
Recommandé
Sensor Interface Switching
The MAX4854HETE+ can multiplex or isolate sensor signals before they reach an amplifier, converter, or controller. Its 9Ω on-resistance is suitable for many moderate-impedance sensing paths, and the four channels permit selection among sensors without duplicating front-end circuitry. Because sensor sources may have high output impedance, the 27.5 pF input capacitance can materially influence settling time. Use a low-noise buffer when the sensor impedance is high, and compare the resulting RC time constant against the required measurement bandwidth before finalizing the signal chain.
Recommandé
Communication Interface Protection
The MAX4854HETE+ is useful in communication equipment where external lines require controlled routing or isolation. Its over-rail signal handling can support system behavior during rail transitions, while four SPST channels provide economical protection and routing for several conductors. The device itself is an analog switch rather than a communications transceiver, so it complements interface ICs rather than replacing them. Verify the signal amplitude, current, slew rate, and absolute maximum ratings for the specific communication standard, and ensure that control logic cannot activate a path during an invalid analog state.
Recommandé
Battery-Powered Portable Equipment
The MAX4854HETE+ supports compact, low-power equipment because its supply range begins at 2 V and extends to 5.5 V. Four switched channels fit into one 16-pin TQFN package, reducing board area in handheld instruments, portable analyzers, and embedded diagnostic devices. Low-voltage operation still requires careful control-signal design: use rail-to-rail-compatible control outputs and account for the input thresholds specified in the Maxim Integrated datasheet. Confirm leakage current and off-state behavior when the measured signal is sensitive to nanovolt- or microvolt-level changes.
Recommandé
High-Speed Digital Signal Gating
The MAX4854HETE+ can gate low-amplitude digital or mixed-signal nodes when a hard SPST connection is preferable to multiplexing logic. Its 150 MHz bandwidth and 30 ns switching time are much faster than mechanical relay solutions, while the 9Ω on-resistance provides a defined conducting path. The 27.5 pF capacitance is the primary limitation for long lines and fast edges, so keep routing short and provide matched termination where necessary. Validate rise time, ringing, and logic-level compatibility with oscilloscope measurements before using the switch as a general-purpose logic gate.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX4854HETE+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX4854HETE | MAX4854HETE+T |
|---|---|---|---|
| Manufacturer | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated |
| Package | TQFN-16 with exposed pad (3 mm × 3 mm) | TQFN-16 with exposed pad (3 mm × 3 mm) | TQFN-16 with exposed pad (3 mm × 3 mm) |
| Number of Circuits | 4 circuits | 4 circuits | 4 circuits |
| Switch Configuration | 1:1 SPST | 1:1 SPST | 1:1 SPST |
| On Resistance | 9 ohm | 9 ohm | 9 ohm |
| Signal Bandwidth | 150 MHz | 150 MHz | 150 MHz |
| Input Capacitance | 27.5 pF | 27.5 pF | 27.5 pF |
| Supply Voltage Range | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Ordering Presentation | MAX4854HETE+ | MAX4854HETE without plus suffix | MAX4854HETE with tape-and-reel suffix |
Principaux différenciateurs
- Combines four independently routed channels with high bandwidth (vs MAX4854HETE)
- Maintains the same electrical and package configuration in tape-and-reel form (vs MAX4854HETE)
- Provides compact high-speed switching without a mechanical relay (vs MAX4854HETE+T)
Notes de conception
Route the exposed pad directly into a continuous ground plane using the land pattern in the Maxim Integrated package drawing. Keep the switched signal and its return path together, avoid long stubs, and place the device close to the connector, source, or destination that dominates the parasitic loading. The 27.5 pF input capacitance can materially increase loading at 150 MHz, so route geometry is part of the bandwidth design rather than only a mechanical concern.
Check the effective RC response formed by source impedance, the 9Ω on-resistance, and the 27.5 pF switch capacitance. Estimated settling time can be calculated with the input values for the selected source impedance and the total node capacitance; this estimate must be compared with the signal’s required acquisition or pulse-width timing. Use a low-impedance driver when fast edges expose the capacitive loading, and verify ringing with scope measurements at the connector and receiver pins.
Do not treat over-rail signal handling as permission to exceed the absolute maximum ratings. Confirm the maximum signal voltage, supply sequencing, control thresholds, and off-state leakage for every operating condition. Also avoid assuming that the T, non-T, and plus ordering suffixes are interchangeable for incoming inspection; approved purchasing records should specify the exact suffix and physical presentation.
Informations de conformité
The JLCPCB product listing identifies the MAX4854HETE+ as RoHS compliant. The plus ordering suffix is treated as the lead-free designation; no separate halogen-free or conflict-minerals statement was established.
