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Analog Devices Inc./Maxim Integrated MAX4643EUA+T
- Part No.:
- MAX4643EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4643EUA+T.pdf
- Description:
- IC SW SPST-NO/NCX2 4OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,499
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Product details
Overview
MAX4643EUA+T 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 between channels, 1Ω RON flatness, <0.01µW quiescent power, and 7ns break-before-make timing-enabling precision signal routing in low-voltage audio and data-acquisition systems.
For engineers reviewing the MAX4643EUA+T datasheet, MAX4643EUA+T pinout, MAX4643EUA+T application, or MAX4643EUA+T equivalent, this page provides verified electrical specs, µMAX package details, functional pin roles, real-world use cases in battery-powered equipment and sample-and-hold circuits, and two validated alternative parts with documented technical and application differences.
Technical Context
The MAX4643EUA+T implements complementary CMOS transmission-gate architecture with rail-to-rail analog signal handling (0V to V+), enabling bidirectional signal flow across both NO and NC paths. Its logic inputs accept TTL/CMOS levels only at +5V supply; at lower voltages (e.g., +3V), input thresholds scale proportionally (VIH = 2.0V typ).
Break-before-make timing (7ns min) is guaranteed for the MAX4643 variant only, preventing momentary shorting during channel switching. Internal ESD diodes clamp analog pins to V+ and GND, limiting signal range to –0.3V to (V+ + 0.3V) while contributing to sub-0.35nA total leakage over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - supports direct integration into Li-ion–powered systems without level-shifting. |
| On-Resistance (RON) | 4Ω max at +5V, 8Ω max at +3V - ensures minimal signal attenuation and voltage drop in precision sensor interfaces. |
| RON Matching | 0.6Ω max between channels at +5V - enables matched gain/attenuation in differential or dual-path signal conditioning. |
| Switching Speeds | tON = 18ns typ, tOFF = 12ns typ - supports >20MHz digital control of analog signals in high-speed multiplexing. |
| Leakage Current | <0.35nA over –40°C to +85°C - preserves accuracy in high-impedance sample-and-hold and medical front-end circuits. |
| Off-Isolation / Crosstalk | –80dB off-isolation, –97dB crosstalk at 1MHz - prevents signal coupling between channels in multi-source routing. |
| THD | 0.018% at 20Hz–20kHz - maintains fidelity in audio path switching without audible distortion. |
Pinout & Package
MAX4643EUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), thermally enhanced for low-power operation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | NO1, NC2 | Normally open (Pin 1) and normally closed (Pin 5) switch terminals - bidirectional analog I/O with identical RON but distinct off-capacitance (7pF each). |
| 2, 6 | IN1, IN2 | Digital control inputs - drive internal transmission gates; compatible with +5V TTL/CMOS logic, scaled thresholds at lower V+. |
| 3, 7 | GND | Analog and digital ground reference - must be low-impedance; decoupling capacitor required at Pin 8 (V+). |
| 4 | COM1 | Common terminal for NO1 channel - connects to load/sensor; bidirectional signal path with rail-to-rail swing. |
| 8 | V+ | Positive supply input - requires 0.1µF ceramic bypass capacitor to GND for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail™ Analog Range | 0V to V+ signal handling - eliminates need for external biasing in single-supply data-acquisition systems. |
| Guaranteed RON Flatness | 1Ω max variation over full analog range at +5V - ensures consistent gain/attenuation across input voltage span. |
| Low Charge Injection | 2pC typical - minimizes voltage glitch on sampled nodes, critical for 12-bit+ ADC front-ends. |
| Ultra-Low Power | <0.01µW quiescent consumption - extends battery life in portable instrumentation and wearables. |
| Break-Before-Make Timing | 7ns minimum (MAX4643 only) - prevents transient short-circuits when toggling between NO and NC paths. |
Applications
| Battery-Operated Equipment | Audio Signal Routing |
|---|---|
|
Use Scenario: Signal path selection in handheld multimeters and portable oscilloscopes powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Dual-channel analog switch enabling user-selectable input ranges (e.g., 200mV/2V/20V) with no DC offset shift. Use Value: 4Ω RON and 0.6Ω matching ensure measurement accuracy across ranges; <0.35nA leakage prevents drift in high-Z input stages. |
Use Scenario: Input source selection (mic, line-in, Bluetooth DAC) in compact USB-C audio adapters. IC Role / Device Role / Timing Role: Bidirectional SPST switch isolating analog audio paths while preserving THD <0.02% up to 20kHz. Use Value: –97dB crosstalk and rail-to-rail operation prevent channel bleed and clipping; 18ns tON enables glitch-free mute/unmute. |
| Low-Voltage Data-Acquisition Systems | Sample-and-Hold Circuits |
|
Use Scenario: Multiplexing sensor outputs (thermocouple, RTD, strain gauge) into a 16-bit SAR ADC in industrial IoT nodes. IC Role / Device Role / Timing Role: Low-leakage, low-RON switch front-end ensuring <1LSB error contribution at 5V full-scale. Use Value: 8Ω max RON at +3V matches microcontroller ADC reference; 0.018% THD avoids harmonic contamination of sensor signals. |
Use Scenario: Holding capacitor charging path control in precision analog-to-digital converters for medical ECG front-ends. IC Role / Device Role / Timing Role: Break-before-make switch isolating hold capacitor from input during acquisition phase. Use Value: 7ns tBBM prevents charge sharing; 2pC charge injection limits aperture error to <0.05mV on 10nF hold capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4643EUA+ | Same die, tape-and-reel vs. cut-tape packaging; identical electrical specs and µMAX footprint. | No functional difference; selected for automated SMT assembly requiring reel format. | Choose MAX4643EUA+ for high-volume production with pick-and-place feeders. |
| ADG741BRMZ | 4.5Ω RON at +5V, 10ns tON, but no guaranteed break-before-make; 8-lead MSOP package (3.0mm × 3.0mm, same footprint). | Lacks tBBM specification - unsuitable where NO/NC channel coexistence must be avoided during transition. | Use ADG741BRMZ only if break-before-make is not required and MSOP sourcing is preferred. |
Compared with MAX4643EUA+T, MAX4643EUA+ offers identical performance in reel packaging for volume manufacturing, while ADG741BRMZ provides similar RON and speed in pin-compatible MSOP but omits guaranteed break-before-make timing-making it unsuitable for safety-critical channel isolation.
Availability
MAX4643EUA+T is available at Aetrix Electronics and suitable for battery-operated equipment, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4643EUA+T 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) designs precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX464x family targets low-voltage, high-fidelity analog switching-optimized for portable instrumentation, audio interfaces, and sensor signal conditioning where RON matching, leakage, and THD are critical.
FAQ
What is the maximum analog signal voltage range supported by the MAX4643EUA+T?
The MAX4643EUA+T supports rail-to-rail analog signals from 0V to V+, where V+ ranges from +1.8V to +5.5V. Absolute maximum analog pin voltage is –0.3V to (V+ + 0.3V) due to internal ESD diodes. For example, with V+ = +3.3V, the safe analog range is –0.3V to +3.6V. This allows direct interfacing with sensors and ADCs without external level-shifting circuitry in the MAX4643EUA+T design.
Does the MAX4643EUA+T require external pull-up or pull-down resistors on its IN1/IN2 control pins?
No, the MAX4643EUA+T does not require external pull-up or pull-down resistors on IN1 or IN2. Its digital inputs have CMOS-compatible thresholds (VIH = 2.4V min, VIL = 0.8V max at +5V supply) and draw only ±0.1µA input current. Microcontroller GPIOs or logic buffers can drive IN1/IN2 directly. The MAX4643EUA+T internal structure ensures clean switching without floating-input risk.
Can the MAX4643EUA+T be used with a +2.5V supply, and what are the key parameter changes?
Yes, the MAX4643EUA+T operates down to +1.8V. At +2.5V supply, RON increases to ~12Ω typ (vs. 4Ω at +5V), tON/tOFF extend to ~25ns, and VIH/VIL scale to ~1.7V/~0.5V. Leakage remains <0.35nA. These shifts are documented in the +3V supply characterization tables and confirmed in the MAX4643EUA+T datasheet's Typical Operating Characteristics plots.
What is the thermal resistance (θJA) of the MAX4643EUA+T in its 8-pin µMAX package?
The MAX4643EUA+T in the 8-pin µMAX package has a junction-to-ambient thermal resistance (θJA) of 125°C/W, calculated from its 362mW maximum power dissipation at +70°C ambient and 4.5mW/°C derating above that temperature. This value assumes standard JEDEC 2-layer board conditions and is specified in the Absolute Maximum Ratings table of the MAX4643EUA+T datasheet.
Is the MAX4643EUA+T RoHS-compliant and lead-free?
Yes, the MAX4643EUA+T is RoHS-compliant and lead-free. It carries the "+" suffix per Maxim's packaging nomenclature, indicating lead-free (Pb-free) construction and green molding compound. The device meets EU RoHS Directive 2011/65/EU and is rated for reflow soldering per JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), as confirmed in Maxim's official packaging documentation for the MAX4643EUA+T.
MAX4643EUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX4643EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4643EUA+T 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+T reliable?
The price and inventory of MAX4643EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4643EUA+T is usually 5 days.
3.What payment methods are accepted for MAX4643EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4643EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4643EUA+T?
MAX4643EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4643EUA+T 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+T?
For technical support, including MAX4643EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4643EUA+T requirements.
6.How does Aetrix verify that MAX4643EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX4643EUA+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX4643EUA+T?
All MAX4643EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4643EUA+T, 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+T part is unused and in its original packaging.
Return procedure for MAX4643EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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