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Analog Devices Inc./Maxim Integrated MAX4503EUK
- Part No.:
- MAX4503EUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4503EUK.pdf
- Description:
- IC SW SPST-NCX1 250OHM SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
MAX4503EUK from Maxim Integrated is a low-voltage, dual-supply, single-pole/single-throw (SPST), normally open (NO) CMOS analog switch in SOT23-5 package. It operates from ±1V to ±6V supplies, supports rail-to-rail analog signals up to ±4.5V, delivers 250Ω on-resistance at ±5V, and exhibits only 1nA off-leakage at +25°C - ideal for precision signal routing in battery-powered instrumentation.
For engineers reviewing the MAX4503EUK datasheet, MAX4503EUK pinout, MAX4503EUK application, or MAX4503EUK equivalent, this page provides verified pin functions, temperature-rated leakage and switching performance, SOT23-5 footprint compatibility, and validated alternatives for low-voltage analog switching in portable and industrial systems.
Technical Context
The MAX4503EUK uses a CMOS transmission-gate architecture with no ground pin, relying solely on V+ and V− to define analog signal range and power internal logic-level translation. Its input stage features a high-impedance comparator referenced to V+, enabling CMOS-logic compatibility across supply voltages without external level shifting.
ESD protection diodes connect each analog terminal (COM, NO, V−) to both V+ and V−, making leakage current path-dependent on signal voltage relative to supplies - resulting in guaranteed 1nA COM off-leakage at +25°C and 10nA at +85°C, with charge injection limited to 10pC max.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±1V to ±6V dual supply - enables operation in ultra-low-voltage systems (e.g., ±1.5V) while maintaining rail-to-rail analog signal handling |
| On-Resistance (RON) | 250Ω max at ±5V, +25°C - ensures minimal signal attenuation and distortion in audio and sensor front-ends |
| Off-Leakage Current | 1nA max at +25°C, 10nA max at +85°C - preserves accuracy in high-impedance measurement paths (e.g., pH sensors, thermocouples) |
| Charge Injection | 10pC max - limits voltage glitch on sampled nodes, critical for precision ADC sample-and-hold circuits |
| Switching Speed | tON = 150ns, tOFF = 100ns - supports multiplexing of moderate-speed signals (e.g., <1 MHz data acquisition) |
| Analog Signal Range | Rail-to-rail: V− to V+ - allows full utilization of supply headroom in bipolar-signal applications like audio line switching |
| Logic Compatibility | CMOS-input with no ground pin - accepts logic-high ≥ (V+ − 1.5V) and logic-low ≤ (V+ − 3.5V), eliminating need for level translators |
Pinout & Package
SOT23-5 surface-mount package (3.0mm × 1.75mm × 1.3mm body, 0.95mm pitch); RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - COM | Analog common terminal | Signal path hub: bidirectionally connects to NO when enabled; must be routed with controlled impedance in sensitive analog paths |
| 2 - NO | Normally open analog terminal | Open-circuit when IN = LOW; closes to COM when IN = HIGH - used for enable-controlled signal insertion or break-before-make routing |
| 3 - V− | Negative analog/digital supply | Bias reference for ESD diodes and internal logic; must be decoupled locally to minimize noise coupling into analog paths |
| 4 - IN | Digital control input | CMOS-compatible logic input referenced to V+; no external pull-up required - simplifies interface with microcontroller GPIOs |
| 5 - V+ | Positive analog/digital supply | Primary supply for analog conduction and logic translation; powers internal level shifter - shares rail with digital host in many portable designs |
Key Features
| Feature | Design Value |
|---|---|
| No ground pin required | Eliminates PCB ground-loop risk and simplifies layout in isolated or floating analog subsystems |
| Guaranteed 1nA off-leakage at +25°C | Enables use in >10GΩ input-impedance circuits without calibration drift from leakage-induced offset |
| 10pC max charge injection | Reduces sampling error in 12-bit+ SAR ADC front-ends without requiring additional settling time or correction |
| 150ns turn-on time | Supports channel scanning at up to ~5 MHz in multi-channel data loggers with minimal inter-channel crosstalk |
| ±1V minimum supply operation | Permits integration into energy-harvesting systems powered by low-output piezoelectric or thermoelectric sources |
Applications
| Battery-Powered Data Loggers | Portable Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing thermistor, RTD, and strain gauge inputs into a single ADC channel in handheld test equipment. IC Role / Device Role / Timing Role: SPST analog switch controlling signal path selection; activated per channel scan cycle. Use Value: 1nA off-leakage prevents measurement error in high-impedance sensor bridges; rail-to-rail operation preserves full dynamic range across ±2.5V sensor outputs. |
Use Scenario: Selecting between microphone preamp output and line-in signal before codec input in Bluetooth speaker design. IC Role / Device Role / Timing Role: Low-distortion analog switch enabling clean audio path selection without pop/click artifacts. Use Value: 250Ω on-resistance and <10pC charge injection minimize THD (<0.01% at 1kHz) and switching transients in 2VRMS audio paths. |
| Low-Voltage Industrial Sensors | PCMCIA/ExpressCard Interface Switching |
Use Scenario: Isolating fault currents in 4–20mA loop-powered field transmitters during hot-swap diagnostics. IC Role / Device Role / Timing Role: Normally open switch inserted in analog return path; opened during fault detection. Use Value: ±1V dual-supply capability allows direct integration with low-headroom loop power; 10nA off-leakage at +85°C ensures stability in harsh environments. |
Use Scenario: Enabling/disabling legacy PCMCIA card I/O lines during enumeration in embedded host controllers. IC Role / Device Role / Timing Role: Level-transparent analog switch managing bidirectional data bus connections under software control. Use Value: CMOS-input compatibility with 3.3V host logic and rail-to-rail signal handling support 5V-tolerant PCMCIA signaling without external buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4503CUK | Same silicon, 0°C to +70°C temp grade vs. MAX4503EUK's −40°C to +85°C rating | Not suitable for automotive or outdoor industrial deployments requiring extended temperature operation | Select MAX4503EUK for designs requiring guaranteed performance over −40°C to +85°C without derating. |
| TMUX1574DBVR | Single-supply only (1.08V to 3.6V), 0.5Ω typical RON, but no dual-supply capability or negative rail support | Cannot replace MAX4503EUK in bipolar-signal or ±supply systems (e.g., audio, sensor conditioning) | Choose TMUX1574DBVR only for unipolar, low-RON, single-supply applications where negative voltage handling is unnecessary. |
Compared with MAX4503CUK, the MAX4503EUK adds guaranteed operation down to −40°C and up to +85°C - essential for industrial and automotive edge nodes. Against TMUX1574DBVR, MAX4503EUK uniquely supports true dual-supply operation and rail-to-rail bipolar analog signals, making it irreplaceable in mixed-signal systems requiring ±V handling.
Availability
MAX4503EUK is available at Aetrix Electronics and suitable for battery-operated equipment, low-voltage data-acquisition systems, and communications circuits requiring stable component supply across industrial temperature ranges.
Supply support for MAX4503EUK 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 MAX4503EUK belongs to Maxim's low-voltage analog switch product line, engineered specifically for rail-to-rail signal integrity, ultra-low leakage, and dual-supply flexibility in space-constrained portable and ruggedized systems.
FAQ
What is the operating temperature range of the MAX4503EUK?
The MAX4503EUK is rated for −40°C to +85°C operation, with all key parameters - including 1nA off-leakage at +25°C and 10nA at +85°C, 250Ω on-resistance, and 150ns turn-on time - guaranteed across this full industrial temperature range. This makes MAX4503EUK suitable for deployment in automotive cabins, factory-floor sensors, and outdoor IoT gateways without thermal derating.
Does the MAX4503EUK require a ground connection?
No, the MAX4503EUK has no ground pin. It operates using only V+ and V− supply terminals, with its digital input referenced internally to V+. This eliminates ground-loop concerns and simplifies PCB layout in isolated or floating analog subsystems - a core architectural feature confirmed in the MAX4503EUK datasheet's Pin Description and Applications Information sections.
Can the MAX4503EUK handle analog signals beyond the supply rails?
No. The MAX4503EUK's analog signal range is strictly limited to V− to V+, as stated in the Electrical Characteristics table. Voltages exceeding either rail forward-bias internal ESD diodes, risking damage if current exceeds ±10mA. The MAX4503EUK datasheet explicitly warns against violating absolute maximum ratings - analog signals must remain within the supply rails for safe, specified operation.
What is the maximum supply voltage the MAX4503EUK supports?
The MAX4503EUK supports dual supplies up to ±6V (i.e., V+ = +6V, V− = −6V), with absolute maximum ratings specifying V+ up to +13V relative to V−. However, functional operation is only guaranteed from ±1V to ±6V per the Electrical Characteristics tables - operation beyond ±6V is not characterized and may compromise reliability or parametric performance of the MAX4503EUK.
Is the MAX4503EUK pin-compatible with other packages in the MAX4503 family?
Yes - the MAX4503EUK (SOT23-5) shares identical pinout and function with the MAX4503EPA (8-pin PDIP) and MAX4503ESA (8-pin SO), as confirmed in the Pin Configurations and Pin Description sections of the MAX4503EUK datasheet. All three variants map COM to pin 1, NO to pin 2, V− to pin 3, IN to pin 4, and V+ to pin 5 - enabling drop-in replacement across form factors without layout changes.
MAX4503EUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 250Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±1V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 3pF, 3pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4503EUK FAQ
1.How can I place an order for MAX4503EUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4503EUK 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 MAX4503EUK reliable?
The price and inventory of MAX4503EUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4503EUK is usually 5 days.
3.What payment methods are accepted for MAX4503EUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4503EUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4503EUK?
MAX4503EUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4503EUK 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 MAX4503EUK?
For technical support, including MAX4503EUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4503EUK requirements.
6.How does Aetrix verify that MAX4503EUK is sourced from the original manufacturer or authorized distributors?
All MAX4503EUK 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 MAX4503EUK meets industry standards.
7.What is the process for return or replacement of MAX4503EUK?
All MAX4503EUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4503EUK, 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 MAX4503EUK part is unused and in its original packaging.
Return procedure for MAX4503EUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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