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Analog Devices Inc./Maxim Integrated MAX4643EUA+
- Part No.:
- MAX4643EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4643EUA+.pdf
- Description:
- IC SW SPST-NO/NCX2 4OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
MAX4643EUA+ from Maxim Integrated is a dual SPST analog switch IC with one normally open (NO) and one normally closed (NC) channel, operating from +1.8V to +5.5V single supply. It delivers 4Ω max on-resistance at +5V, 0.6Ω RON matching, 1Ω RON flatness, <20ns switching times, and <0.35nA leakage over –40°C to +85°C - ideal for precision signal routing in battery-powered audio and data-acquisition systems.
For engineers reviewing the MAX4643EUA+ datasheet, MAX4643EUA+ pinout, MAX4643EUA+ application, or MAX4643EUA+ equivalent, this page provides verified electrical specs, µMAX package details, truth-table–confirmed break-before-make timing, rail-to-rail analog signal handling, and real-world substitution guidance for low-voltage analog switching designs.
Technical Context
The MAX4643EUA+ integrates two independent CMOS SPST switches with complementary control logic: IN1 drives NO1 (open when high), IN2 drives NC2 (closed when high). Its internal level translators ensure TTL/CMOS-compatible input thresholds only at +5V supply, while rail-to-rail analog operation supports ±0.3V headroom relative to V+ and GND across the full supply range.
Each switch features ESD protection diodes between analog pins and V+/GND, defining leakage paths; off-isolation (–80dB at 1MHz) and crosstalk (–97dB at 1MHz) are measured with standardized 50Ω terminations per Figure 5, and break-before-make timing (7ns typ) is guaranteed only for the MAX4643 variant per Note 4 and truth table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - enables direct interface with Li-ion, 3.3V, and 5V logic without level shifters |
| RON (max) | 4Ω at +5V - ensures minimal signal attenuation and gain error in precision sensor or audio paths |
| RON Matching | 0.6Ω max between channels - critical for matched-gain instrumentation amplifier front-ends |
| tON/tOFF | 18ns/12ns typ - supports >25MHz switching in sample-and-hold or multiplexed ADC applications |
| Leakage Current | <0.35nA over –40°C to +85°C - preserves accuracy in high-impedance pH or thermocouple circuits |
| Analog Signal Range | Rail-to-rail (0V to V+) - allows full-scale signal passage without clipping in unipolar systems |
| Break-Before-Make | 7ns typ (MAX4643 only) - prevents momentary shorting in power-switching or relay-replacement circuits |
Pinout & Package
The MAX4643EUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SOIC-8 footprints but with 50% smaller area and improved thermal resistance (4.5mW/°C derating above +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | NO1, NC2 | Normally open and normally closed analog terminals - bidirectional; NO1 conducts when IN1 = high, NC2 conducts when IN2 = high |
| 2, 6 | IN1, IN2 | Logic inputs - CMOS/TTL compatible only at +5V; threshold scales with V+ per Figure 6 |
| 3, 7 | GND | Ground reference - must be low-impedance return path for analog and digital currents |
| 4 | COM1 | Common terminal for NO1 - connects to load/sensor; bidirectional current path up to ±50mA |
| 8 | V+ | Positive supply - requires 0.1µF ceramic bypass capacitor to GND for stable switching performance |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog operation | Supports 0V to V+ signal swing without distortion - eliminates need for external biasing in single-supply systems |
| Guaranteed RON flatness | 1Ω max variation over full analog range - maintains consistent gain/attenuation in variable-gain amplifiers |
| Low charge injection | 2pC typ - minimizes voltage glitch on sampled nodes in precision ADC front-ends |
| High off-isolation | –80dB at 1MHz - suppresses coupling between active and inactive channels in multi-signal routing |
| Ultra-low quiescent power | <0.01µW - extends battery life in always-on portable medical or IoT sensors |
Applications
| Battery-Powered Audio Routing | Low-Voltage Data Acquisition |
|---|---|
Use Scenario: Selecting between microphone and line-in inputs in a handheld voice recorder powered by a 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Dual SPST switch providing isolated signal paths with break-before-make timing to prevent pop/click artifacts during source switching. Use Value: 4Ω RON and rail-to-rail operation preserve SNR and dynamic range; <0.35nA leakage avoids DC offset drift in AC-coupled preamps. | Use Scenario: Multiplexing eight thermistor inputs into a single 16-bit SAR ADC in an industrial temperature monitor. IC Role / Device Role / Timing Role: Precision analog switch enabling low-error signal selection with matched RON to minimize channel-to-channel gain mismatch. Use Value: 0.6Ω RON matching and 1Ω flatness reduce measurement nonlinearity; 2pC charge injection prevents settling errors in high-impedance sensor paths. |
| Sample-and-Hold Circuits | Communications Signal Switching |
Use Scenario: Capturing fast transient waveforms in a portable oscilloscope frontend using a 1Msps sampling rate. IC Role / Device Role / Timing Role: High-speed switch isolating hold capacitor from input during acquisition phase with sub-20ns tON/tOFF. Use Value: 18ns/12ns typical switching ensures aperture time stability; –97dB crosstalk prevents feedthrough from adjacent clock or digital lines. | Use Scenario: Routing RF IF signals (up to 10MHz) between transceiver chains and test points in a cellular baseband module. IC Role / Device Role / Timing Role: Low-distortion analog switch enabling clean signal path reconfiguration without harmonic generation. Use Value: 0.018% THD and –80dB off-isolation maintain signal integrity; 7pF off-capacitance minimizes impedance discontinuity at IF frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG741BRMZ | 4.5Ω RON max at +5V; 10ns tON; no break-before-make guarantee; MSOP-8 package | Lacks MAX4643EUA+'s integrated NO/NC pairing - requires two discrete switches for same function | Select when faster switching dominates over channel complementarity and BMB timing assurance |
| TS5A23157DGSR | 0.9Ω RON at +3.3V; 10ns tON; no NC/NO combination; 10-pin VSSOP package | Higher channel count (dual SPDT) but no native break-before-make - unsuitable for relay-replacement where contact sequencing is critical | Select for lower RON in 3.3V systems where NO/NC duality and guaranteed BMB are not required |
Compared with ADG741BRMZ and TS5A23157DGSR, the MAX4643EUA+ uniquely provides factory-guaranteed break-before-make timing and integrated NO/NC topology in a space-saving µMAX package - making it the only choice for compact, sequenced analog path switching in battery-constrained designs.
Availability
MAX4643EUA+ is available at Aetrix Electronics and suitable for battery-operated equipment, audio/video signal routing, low-voltage data-acquisition systems, sample-and-hold circuits, and communications circuits requiring stable component supply across industrial temperature ranges.
Supply support for MAX4643EUA+ 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX464x family was designed specifically for low-voltage, high-fidelity analog signal routing in portable and space-constrained systems - emphasizing rail-to-rail operation, ultra-low leakage, and guaranteed switching characteristics under varying supply conditions.
FAQ
What is the guaranteed on-resistance specification for MAX4643EUA+ at +3V supply?
The MAX4643EUA+ guarantees 8Ω maximum on-resistance at +3V supply (V+ = +2.7V to +3.3V), with typical RON of 6Ω. This value is tested per Electrical Characteristics Table for +3V Supply, ensuring predictable insertion loss in 3.3V systems such as USB-powered instrumentation. The MAX4643EUA+ maintains rail-to-rail analog signal handling even at this reduced supply voltage.
Does MAX4643EUA+ support true break-before-make switching, and is it specified in the datasheet?
Yes, MAX4643EUA+ provides guaranteed break-before-make (BBM) timing of 7ns typical (10ns max), explicitly documented in the Dynamic Characteristics table under "Break-Before-Make (MAX4643 only)". This feature is intrinsic to the MAX4643 variant's internal logic design and ensures no overlap between NO1 and NC2 conduction - critical for preventing short-circuits in power-path or relay-replacement applications.
Can MAX4643EUA+ operate with a +1.8V supply, and what are the trade-offs?
Yes, MAX4643EUA+ operates down to +1.8V supply, with typical RON of 30Ω over temperature. However, logic input thresholds (VIH/VIL) scale with V+, so CMOS/TTL compatibility is not assured below +5V. At +1.8V, switching times increase (~22ns tON) and RON flatness degrades - the MAX4643EUA+ remains functional but optimized for precision only above +2.7V per Electrical Characteristics tables.
What is the maximum continuous current rating for the analog terminals of MAX4643EUA+?
The MAX4643EUA+ supports ±50mA continuous current on NO_, NC_, and COM_ terminals, and ±20mA on any terminal including IN_ and GND. These ratings are defined in Absolute Maximum Ratings and apply across –40°C to +85°C. Exceeding them risks permanent damage; for sustained 50mA loads, thermal derating per the µMAX package's 4.5mW/°C spec must be observed above +70°C ambient.
Is the MAX4643EUA+ pinout compatible with other devices in the MAX464x family?
Yes, MAX4643EUA+ shares identical 8-pin µMAX pinout with MAX4641EUA+ and MAX4642EUA+, including pin-for-pin mapping of IN1/IN2, COM1/COM2, NO1/NC2, GND, and V+. Functional differences (NO/NO, NC/NC, NO/NC) are implemented internally - allowing drop-in replacement in PCB layouts, though logic control sequencing must match the target switch type's truth table.
MAX4643EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 4Ohm
- Channel-to-Channel Matching (ΔRon):
- 200mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 15ns, 8ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 7pF, 7pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -97dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4643EUA+ FAQ
1.How can I place an order for MAX4643EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4643EUA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4643EUA+ reliable?
The price and inventory of MAX4643EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4643EUA+ is usually 5 days.
3.What payment methods are accepted for MAX4643EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4643EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4643EUA+?
MAX4643EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4643EUA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4643EUA+?
For technical support, including MAX4643EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4643EUA+ requirements.
6.How does Aetrix verify that MAX4643EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4643EUA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4643EUA+ meets industry standards.
7.What is the process for return or replacement of MAX4643EUA+?
All MAX4643EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4643EUA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4643EUA+ part is unused and in its original packaging.
Return procedure for MAX4643EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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