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Analog Devices Inc./Maxim Integrated MAX4644EUA+T
- Part No.:
- MAX4644EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4644EUA+T.pdf
- Description:
- IC SWITCH SPDT X 1 4OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:504
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Product details
Overview
The MAX4644EUA+T from Maxim Integrated is a single-pole/double-throw (SPDT) CMOS analog switch operating from a single +1.8V to +5.5V supply, delivering 4Ω max on-resistance at +5V, 18ns typical turn-on time, and rail-to-rail analog-signal range - used for precision signal routing in low-voltage data-acquisition systems and battery-powered audio/video equipment.
For engineers reviewing the MAX4644EUA+T datasheet, MAX4644EUA+T pinout, MAX4644EUA+T application, or MAX4644EUA+T equivalent, key selection criteria include guaranteed RON flatness (≤0.75Ω), break-before-make timing (≤8ns), <0.35nA leakage over –40°C to +85°C, and μMAX-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4644EUA+T implements a BiCMOS SPDT switch architecture with TTL/CMOS-compatible digital control inputs and bidirectional analog signal paths. Its internal logic-level translators convert IN logic states into full-rail gate drive for NMOS/PMOS pass transistors, enabling rail-to-rail operation without external level shifting.
ESD protection diodes are integrated between each analog terminal (COM, NO, NC) and both V+ and GND, defining absolute maximum analog voltage limits as –0.3V to (V+ + 0.3V). Leakage current stems primarily from reverse-biased ESD diodes, not channel conduction, and is specified ≤±0.25nA over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - supports direct interface with Li-ion battery, 3.3V logic, and 5V legacy systems without level shifters. |
| On-Resistance (RON) | 4Ω max at +5V - ensures minimal signal attenuation and gain error in precision instrumentation front-ends. |
| RON Flatness | 0.75Ω typ at +5V - maintains consistent gain across full analog input range (0V to V+), critical for audio and video fidelity. |
| Turn-On/Off Time | 18ns / 12ns typ at +5V - enables high-speed multiplexing in sampling systems up to ~25MHz effective switching rate. |
| Leakage Current | ±0.25nA max over –40°C to +85°C - preserves accuracy in high-impedance sample-and-hold and sensor interfaces. |
| Off-Isolation | –80dB at 1MHz - suppresses crosstalk between active and inactive signal paths in multi-channel routing. |
| Charge Injection | 5pC - limits voltage glitch on high-Z hold capacitors, reducing settling error in ADC input stages. |
Pinout & Package
The MAX4644EUA+T is housed in an 8-pin μMAX® package (package code U8+1, outline 21-0036), measuring 3.0mm × 3.0mm × 0.8mm with exposed pad for thermal enhancement. Pin 1 is marked with a dot; pin 1 orientation aligns with top-marking "-".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Digital Control Input | Active-high TTL/CMOS-compatible logic input controlling switch state; drives internal level translators. |
| 2 (GND) | Analog/Digital Ground | Common reference for analog signals and digital logic; must be low-impedance to minimize noise coupling. |
| 3 (NO) | Analog Normally Open Terminal | Connects to COM only when IN = high; bidirectional path with 12pF off-capacitance. |
| 4 (COM) | Analog Common Terminal | Central signal node routed to either NO or NC; supports rail-to-rail ±20mA continuous current. |
| 5 (NC) | Analog Normally Closed Terminal | Connects to COM only when IN = low; exhibits same RON and leakage specs as NO. |
| 6 (N.C.) | No Connection | Internally unconnected pin; must remain floating or grounded per layout best practices. |
| 7 (N.C.) | No Connection | Internally unconnected pin; no electrical function; avoid routing traces to this pad. |
| 8 (V+) | Positive Supply Input | Single power rail for analog and digital sections; requires 0.1μF ceramic bypass capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Analog Operation | Supports input signals from GND to V+ without clipping - eliminates need for external biasing in portable audio codecs. |
| Break-Before-Make Switching | Guaranteed ≤8ns tBBM prevents momentary shorting between NO and NC - essential for fault-tolerant communication line switching. |
| Low THD & Crosstalk | 0.018% THD and –82dB crosstalk at 1MHz - preserves signal integrity in stereo audio and composite video routing. |
| Ultra-Low Quiescent Power | <0.01μW supply current - extends battery life in always-on sensor nodes and wearable medical devices. |
| Guaranteed RON Matching | 0.1Ω typ match between NO and NC channels - enables precise differential signal switching without gain mismatch. |
Applications
| Battery-Operated Equipment | Audio Signal Routing |
|---|---|
Use Scenario: Signal path selection in handheld ultrasound probes powered by single-cell Li-ion batteries (2.7V–4.2V). IC Role / Device Role / Timing Role: SPDT analog switch routing transducer receive signals to ADC while isolating transmit paths during pulse-echo cycles. Use Value: 4Ω RON and rail-to-rail operation preserve small-signal SNR; <0.35nA leakage prevents baseline drift in high-gain LNA stages. | Use Scenario: Stereo channel muting and source selection in Bluetooth speaker ICs with 3.3V supply. IC Role / Device Role / Timing Role: Low-distortion analog switch enabling seamless crossfading between AUX-in and Bluetooth DAC outputs. Use Value: 0.018% THD and –82dB crosstalk prevent audible artifacts; 18ns switching allows sub-millisecond mute transitions. |
| Low-Voltage Data-Acquisition Systems | Sample-and-Hold Circuits |
Use Scenario: Multiplexing thermocouple and RTD inputs into a 16-bit SAR ADC in industrial IoT sensor nodes. IC Role / Device Role / Timing Role: Precision SPDT switch selecting between differential sensor pairs before programmable gain amplifier (PGA) input. Use Value: 0.75Ω RON flatness minimizes gain nonlinearity; 5pC charge injection reduces hold-mode settling error. | Use Scenario: Holding sampled voltage on 10pF capacitor in high-speed oscilloscope front-end with 100MS/s sampling. IC Role / Device Role / Timing Role: Fast-switching SPDT isolating hold capacitor from input during acquisition phase and connecting it to ADC during conversion. Use Value: 12ns tOFF ensures clean hold-node disconnection; low leakage (<0.25nA) limits droop to <1LSB over 1μs hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG774ACRZ-REEL7 | 4.5Ω RON max at +5V; 2.5ns faster tON; requires dual supply (±1.8V) or level-shifter for single-supply use. | Optimized for RF/microwave test equipment where ultra-low capacitance (9pF COFF) matters more than leakage. | Select when speed >1GHz bandwidth needed and dual-supply infrastructure exists. |
| TS5A23157DCUR | 0.9Ω RON at +3.3V but degrades to 12Ω at +1.8V; 10nA leakage at +85°C - 30× higher than MAX4644EUA+T. | Suitable for cost-sensitive consumer audio docks where moderate THD (0.03%) is acceptable. | Select for 3.3V-only systems prioritizing low RON over leakage-critical precision. |
Compared with ADG774ACRZ-REEL7 and TS5A23157DCUR, the MAX4644EUA+T uniquely balances ultra-low leakage, guaranteed RON flatness, and single-supply operation down to +1.8V - making it optimal for battery-powered precision measurement where signal integrity and power efficiency are co-constrained.
Availability
The MAX4644EUA+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 across extended temperature ranges (–40°C to +85°C).
Supply support for MAX4644EUA+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 high-performance analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.
The MAX4644 belongs to Maxim's precision analog switch product line, engineered specifically for low-voltage, low-leakage, high-fidelity signal routing in portable and measurement-grade electronics.
FAQ
What is the maximum supply voltage rating for the MAX4644EUA+T?
The MAX4644EUA+T has an absolute maximum supply voltage (V+) of +6V. However, functional operation is specified only from +1.8V to +5.5V. Operating above +5.5V risks permanent damage and violates the device's guaranteed performance specifications. The +6V rating is a stress limit, not an operational condition - sustained use beyond +5.5V voids reliability guarantees and may degrade RON, leakage, or switching speed in the MAX4644EUA+T.
Does the MAX4644EUA+T support rail-to-rail analog signal swing?
Yes, the MAX4644EUA+T supports true rail-to-rail analog signal operation: analog inputs and outputs can swing from GND to V+ across the full –40°C to +85°C temperature range. This capability is enabled by its BiCMOS process and internal level-translator architecture, eliminating the need for external biasing networks. Signal integrity remains preserved within datasheet-specified RON, flatness, and THD limits throughout the entire range - a key design advantage of the MAX4644EUA+T in portable audio and sensor interfaces.
What is the guaranteed break-before-make time for the MAX4644EUA+T?
Break-before-make (tBBM) is guaranteed at ≤8ns over the full –40°C to +85°C temperature range and +4.5V to +5.5V supply. This specification ensures no overlap between NO and NC conduction paths during switching transitions, preventing momentary shorts that could damage downstream circuitry or corrupt signals. The value is measured under standard load conditions (RL = 300Ω, CL = 35pF) and is independent of signal amplitude - a critical safety feature embedded in the MAX4644EUA+T's internal timing control logic.
Can the MAX4644EUA+T operate reliably at +1.8V supply?
Yes, the MAX4644EUA+T is fully specified and guaranteed for operation at +1.8V supply, including RON (30Ω typ), leakage (<0.35nA), and switching times (tON = 22ns typ). While TTL/CMOS logic compatibility is only assured at +5V, the analog switch functionality remains robust down to +1.8V - enabling direct integration with ultra-low-power microcontrollers and energy-harvesting systems. All parametric limits in the datasheet apply across the full +1.8V to +5.5V range for the MAX4644EUA+T.
What package type does the MAX4644EUA+T use, and is it RoHS-compliant?
The MAX4644EUA+T uses the 8-pin μMAX® package (outline 21-0036), with dimensions 3.0mm × 3.0mm × 0.8mm and an exposed thermal pad. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction per EU Directive 2011/65/EU. The package drawing code is U8+1, and land pattern number is 90-0092 - verified on Maxim's official packaging resource page. This compact, thermally enhanced package supports high-density PCB layouts required in modern portable electronics using the MAX4644EUA+T.
MAX4644EUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 4Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 15ns, 5ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -82dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4644EUA+T FAQ
1.How can I place an order for MAX4644EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4644EUA+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 MAX4644EUA+T reliable?
The price and inventory of MAX4644EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4644EUA+T is usually 5 days.
3.What payment methods are accepted for MAX4644EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4644EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4644EUA+T?
MAX4644EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4644EUA+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 MAX4644EUA+T?
For technical support, including MAX4644EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4644EUA+T requirements.
6.How does Aetrix verify that MAX4644EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX4644EUA+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 MAX4644EUA+T meets industry standards.
7.What is the process for return or replacement of MAX4644EUA+T?
All MAX4644EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4644EUA+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 MAX4644EUA+T part is unused and in its original packaging.
Return procedure for MAX4644EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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