The Analog Devices/Maxim Integrated MAX4782EGE+ is a dual SP4T analog switch designed for precision signal routing in battery-powered and portable electronics. This interface IC integrates two independent single-pole, four-throw (SP4T) switch configurations within a compact 16-pin QFN package measuring 4mm × 4mm with an exposed thermal pad, offering a space-efficient solution for multi-channel signal path management in handheld instruments, test equipment, and communication systems.
Operating from a single supply voltage between 1.6V and 3.6V, the MAX4782EGE+ provides an exceptionally low on-resistance of just 1Ω maximum, which translates to minimal signal attenuation and accurate analog transmission across audio, sensor, and low-frequency data acquisition channels. The channel-to-channel matching specification of 300mΩ supports differential and balanced signal routing where consistent impedance between paths is necessary to maintain signal integrity. Fast switching times of 25ns turn-on and 15ns turn-off enable rapid channel reconfiguration in dynamic scanning applications and multiplexed measurement systems.
The device exhibits a leakage current specification of 2nA maximum in the off state, contributing to low power consumption and high isolation when channels are inactive. Crosstalk performance reaches -80dB at 1MHz, providing effective separation between adjacent signal paths in multi-channel audio mixers, video routing, and RF front-end switching where interference suppression is necessary. The charge injection specification of -110pC indicates the transient disturbance introduced during switching events, a parameter relevant to high-precision analog applications such as sample-and-hold circuits and data converters where switching artifacts can affect measurement accuracy.
Channel capacitance values of 38pF for source-off capacitance and 158pF for drain-off capacitance define the frequency-dependent behavior of the switch. These parameters influence bandwidth and signal coupling in AC applications, making the MAX4782EGE+ suitable for audio frequency signal routing, low-speed data multiplexing, and sensor interface switching where bandwidth requirements fall within the range supported by these capacitance levels.
The 4:1 multiplexer/demultiplexer configuration allows each of the two independent circuits to route one common terminal to any of four selectable channels, or conversely, to select one of four inputs to a single output. This topology is directly applicable to channel expansion in data acquisition systems, input source selection in portable instrumentation, and signal path switching in battery management systems where multiple analog signals must be monitored or routed through a single ADC or signal conditioning path.
Qualified for operation across the industrial temperature range of -40°C to 85°C, the MAX4782EGE+ is compatible with embedded systems, automotive peripherals, and outdoor equipment where extended temperature tolerance is required. The surface-mount QFN package with exposed pad facilitates thermal dissipation and supports automated assembly processes in high-volume manufacturing environments.
The part is designated as obsolete by the manufacturer, indicating that it is no longer in active production, though existing inventory remains available. The device is compliant with RoHS3 directives and REACH regulations, and carries a Moisture Sensitivity Level (MSL) of 1, allowing unlimited floor life after package opening without requiring dry storage or baking procedures prior to reflow soldering. The ECCN classification of EAR99 indicates the component is generally unrestricted for export under U.S. regulations, and the HTSUS code 8542.39.0001 defines its tariff classification for import and customs purposes.
MAX4782EGE+ (1)
Finding a Practical MAX4782EGE+ Analog Devices/Maxim Replacement for Obsolete Dual SP4T Switching Designs
When the Analog Devices Inc./Maxim Integrated MAX4782EGE+ becomes difficult to source, replacement selection is not just a part-number substitution task. The device is a low-voltage, low-on-resistance, dual SP4T analog switch in a 16-QFN package, so a substitute must be checked for signal range, Ron, leakage, charge injection, switching speed, control logic behavior, package footprint, and long-term availability.
Common replacement or alternative part numbers to evaluate include
MAX4782EGE+T
,
MAX4782EGE+T
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16QFN
12304
MAX4782ETE+
,
MAX4782ETE+
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16TQFN
3126
TS3A5018RSVR
, TMUX1309RSVR, TMUX1109RUMR,
TS3A5018RSVR
Texas Instruments
IC SWITCH SPDT X 4 10OHM 16UQFN
59465
ADG709BRUZ
, and ADG709BCPZ-REEL7. Some are closer procurement equivalents, while others are functional alternatives that may require PCB, firmware, or analog performance review.
ADG709BRUZ
Analog Devices Inc.
IC SWITCH SP4TX2 4.5OHM 16TSSOP
3234
A suitable MAX4782EGE+ replacement should first preserve the required 4:1 multiplexer/demultiplexer function across two independent circuits. After that, the selection should focus on whether the system depends on the original 1Ω maximum on-resistance, 1.6V to 3.6V single-supply operation, 25ns/15ns switching speed, and 16-QFN mechanical layout.
What the MAX4782EGE+ Analog Devices/Maxim Device Contributes to the Original Circuit
The MAX4782EGE+ is a dual 4:1 analog multiplexer/demultiplexer switch. It provides two SP4T switch circuits, each routing one common terminal to one of four selectable channels. Its key electrical characteristic is the low 1Ω maximum on-state resistance, which makes it suitable for low-voltage signal paths where series resistance affects gain accuracy, settling behavior, or load drive.
| Specification | MAX4782EGE+ Engineering Relevance |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Function | Dual SP4T analog switch / 2-circuit 4:1 multiplexer-demultiplexer |
| Supply Voltage | 1.6V to 3.6V single supply; suitable for low-voltage portable and embedded systems |
| On-State Resistance | 1Ω max; supports low-loss signal routing and low voltage drop |
| Ron Matching | 300mΩ; helps maintain channel-to-channel consistency |
| Switching Time | Ton 25ns max, Toff 15ns max; useful for fast channel selection |
| Charge Injection | -110pC; affects transient behavior during switching |
| Off Leakage | 2nA max; relevant for high-impedance sensor or sampling nodes |
| Crosstalk | -80dB at 1MHz; supports channel isolation in mixed-signal routing |
| Package | 16-VQFN exposed pad, 16-QFN 4mm x 4mm |
| Temperature Range | -40°C to +85°C |
| Status | Obsolete; replacement planning should consider lifecycle and availability |
The original part is often used in battery-powered equipment, portable instrumentation, audio or baseband routing, sensor multiplexing, and low-voltage data-acquisition front ends. Its low Ron is often the main reason it was chosen instead of a generic CMOS multiplexer such as a 4052-family device.
For replacement decisions, the most restrictive parameters are usually package compatibility, supply-voltage range, Ron, and signal integrity. A higher-Ron substitute may work in high-impedance signal paths but may be unsuitable where the switch drives low-impedance loads or forms part of a precision gain path. Similarly, a part with a 2.7V minimum supply cannot replace MAX4782EGE+ in a 1.8V-only design without power-rail changes.
Candidate Equivalent and Alternative Parts for MAX4782EGE+ Analog Devices/Maxim Designs
| Part Number | Manufacturer | Key Specifications | Product Features | Typical Applications | Why It Can Replace MAX4782EGE+ | Main Differences or Limitations | Recommended Usage |
|---|---|---|---|---|---|---|---|
|
MAX4782EGE+T
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16QFN
12304
| Analog Devices Inc./Maxim Integrated | Dual SP4T, 1Ω max Ron, 1.6V to 3.6V supply, 16-QFN 4mm x 4mm | Same base device, tape-and-reel ordering option | Existing MAX4782EGE+ production builds, service repair, controlled BOM substitutions | Closest procurement equivalent when the same device is available in alternate packaging quantity | Availability may still be limited because the base product is obsolete | First choice when no schematic or PCB change is allowed |
|
MAX4782ETE+
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16TQFN
3126
| Analog Devices Inc./Maxim Integrated | Dual SP4T, low-Ron MAX4782 family device, low-voltage single-supply operation | Same functional family with alternate package option | Redesigns that can preserve the same switch architecture while modifying layout | Maintains the MAX4782 electrical behavior more closely than second-source alternatives | Package and footprint must be verified against the original 16-QFN 4mm x 4mm layout | Good for board revisions where electrical equivalence matters more than drop-in footprint |
|
TS3A5018RSVR
Texas Instruments
IC SWITCH SPDT X 4 10OHM 16UQFN
59465
| Texas Instruments | Dual SP4T analog switch, low-voltage operation, higher Ron than MAX4782EGE+ | Low-power CMOS analog switching, compact package options | Portable systems, audio routing, signal selection, general analog multiplexing | Provides the same dual 4:1 switching topology | Ron is typically much higher than 1Ω; pinout and package are not guaranteed compatible | Suitable when load impedance is high and some insertion resistance is acceptable |
| TMUX1309RSVR | Texas Instruments | Dual 4:1 multiplexer, 1.62V to 5.5V supply range, low-leakage CMOS switch | Wide single-supply range, modern lifecycle, logic-compatible control | Low-voltage signal routing, sensor multiplexing, mixed-signal systems | Covers the low-voltage operating range close to MAX4782EGE+ and offers the same dual 4:1 function | Higher Ron than MAX4782EGE+; PCB and logic-control verification required | Strong option for new designs needing longer lifecycle support |
| TMUX1109RUMR | Texas Instruments | Precision dual 4:1 multiplexer, 1.08V to 5.5V supply range, low leakage | Precision-oriented analog switch with broad supply support | Precision sensing, data acquisition, battery-powered analog front ends | Wider supply range and low leakage can support sensitive analog nodes | Ron and dynamic behavior differ from MAX4782EGE+; package is not a drop-in replacement | Best when leakage and low-voltage operation matter more than ultra-low Ron |
|
ADG709BRUZ
Analog Devices Inc.
IC SWITCH SP4TX2 4.5OHM 16TSSOP
3234
| Analog Devices | Dual 4:1 CMOS multiplexer, 2.7V to 5.5V single supply, TSSOP-16 | Low-voltage analog multiplexer with ADI support | Instrumentation, communication systems, signal routing | Same dual 4:1 functional architecture | Minimum supply is higher than MAX4782EGE+; TSSOP package requires PCB redesign | Suitable for 3.0V or 3.3V systems where layout changes are possible |
| ADG709BCPZ-REEL7 | Analog Devices | Dual 4:1 CMOS multiplexer, 2.7V to 5.5V supply, LFCSP package | Compact ADI alternative to TSSOP version | Space-constrained analog routing, multiplexed signal inputs | Functionally comparable dual 4:1 switching structure | Not suitable for 1.8V-only systems; package and pinout differ | Useful for compact redesigns operating from 2.7V or higher |
The
MAX4782EGE+T
is the most direct route when the goal is to preserve the existing circuit without engineering changes.
MAX4782EGE+T
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16QFN
12304
MAX4782ETE+
may be attractive when staying within the same Maxim device family is preferred, but it should be treated as a layout-level substitution unless the exact footprint and pinout are confirmed.
MAX4782ETE+
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16TQFN
3126
TS3A5018RSVR
and TMUX1309RSVR are more realistic for redesigns than emergency drop-in replacement. They provide the same switching concept, but their on-resistance and package differences can affect gain error, RC settling time, and PCB routing.
TS3A5018RSVR
Texas Instruments
IC SWITCH SPDT X 4 10OHM 16UQFN
59465
TMUX1109RUMR is more precision-oriented, especially where low leakage and supply flexibility are useful. It is not a direct electrical clone of MAX4782EGE+, but it can be a better fit for sensor interfaces or measurement paths where leakage matters more than minimum series resistance.
ADG709BRUZ
and ADG709BCPZ-REEL7 are practical Analog Devices alternatives for 2.7V to 5.5V systems. They should not be selected for designs that rely on MAX4782EGE+ operation down to 1.6V unless the power architecture is changed.
ADG709BRUZ
Analog Devices Inc.
IC SWITCH SP4TX2 4.5OHM 16TSSOP
3234
Engineering Trade-Off Comparison for MAX4782EGE+ Analog Devices/Maxim Replacement Selection
| Evaluation Factor | MAX4782EGE+T | MAX4782ETE+ | TS3A5018RSVR | TMUX1309RSVR | TMUX1109RUMR | ADG709BRUZ | ADG709BCPZ-REEL7 |
|---|---|---|---|---|---|---|---|
| Electrical Compatibility | Highest; same base device | High if package variant matches circuit needs | Moderate; same function but higher Ron | Moderate to high for low-voltage systems | Good for precision low-voltage systems | Good only at 2.7V or higher | Good only at 2.7V or higher |
| Mechanical Compatibility | Best candidate for existing 16-QFN layout | Requires package verification | Requires PCB review | Requires PCB review | Requires PCB review | Requires TSSOP layout | Requires LFCSP layout |
| Performance Difference | No meaningful circuit-level difference expected | Usually close within same family | Higher insertion resistance may affect low-impedance paths | Higher Ron but modern switch behavior | Lower-leakage focus; Ron differs | Different Ron, supply range, and dynamic behavior | Similar to
ADG709BRUZ
Analog Devices Inc.
IC SWITCH SP4TX2 4.5OHM 16TSSOP
3234
|
| Reliability and Lifecycle | Same obsolete product family risk | Same product family risk | Better if active supply is available | Better for new designs if active | Better for new precision designs | Depends on ADI lifecycle status | Depends on ADI lifecycle status |
| Package Availability | Existing QFN format | Alternate package | Compact TI package options | Compact TI package options | Compact precision package | TSSOP-16, easier hand inspection | Compact LFCSP, better density |
| Cost Considerations | May carry obsolete-part pricing | May vary by availability | Often competitive for general switching | Often attractive for redesigns | May cost more than general-purpose muxes | Moderate, depending on sourcing | Moderate, depending on sourcing |
| Best Application Fit | No-change repair or production continuation | Same-family redesign | Audio, portable, high-impedance analog routing | New low-voltage multiplexing designs | Precision sensing and data acquisition | 3.3V instrumentation with PCB redesign | Compact 3.3V analog routing |
| Main Advantage | Closest equivalent | Preserves MAX4782 family behavior | Same dual SP4T concept from another supplier | Wider modern supply flexibility | Low-voltage and low-leakage operation | Established ADI dual mux option | Compact ADI package option |
| Main Limitation | Obsolete availability | Not necessarily footprint-compatible | Ron may be too high for some MAX4782EGE+ circuits | Not a 1Ω-class substitute | Not optimized as a direct low-Ron clone | Cannot support 1.6V operation | Cannot support 1.6V operation |
For a no-redesign replacement,
MAX4782EGE+T
should be checked first because it preserves the original Analog Devices/Maxim electrical and mechanical assumptions. If the system can tolerate a board revision,
MAX4782EGE+T
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16QFN
12304
MAX4782ETE+
may keep the design close to the original MAX4782 family while allowing package flexibility.
MAX4782ETE+
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 1OHM 16TQFN
3126
For new product revisions, TMUX1309RSVR is often a balanced functional alternative because it supports low-voltage single-supply operation and the same dual 4:1 architecture. TMUX1109RUMR is more suitable when leakage, low-voltage sensing, and precision input behavior outweigh the need for 1Ω on-resistance.
ADG709BRUZ
and ADG709BCPZ-REEL7 are reasonable choices in 3.0V or 3.3V systems, but they are not suitable replacements for designs that depend on 1.6V to 1.8V operation.
ADG709BRUZ
Analog Devices Inc.
IC SWITCH SP4TX2 4.5OHM 16TSSOP
3234
TS3A5018RSVR
can be considered where the signal path impedance is high enough that additional Ron does not create unacceptable gain error or settling delay.
TS3A5018RSVR
Texas Instruments
IC SWITCH SPDT X 4 10OHM 16UQFN
59465
Before approving any MAX4782EGE+ replacement, verify pinout, logic truth table, analog signal voltage range, Ron over supply and temperature, leakage at operating temperature, switching transients, package land pattern, and qualification status. For quotations and availability on MAX4782EGE+ alternatives, request pricing through IC-Components.com or email Info@IC-Components.com.
