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Analog Devices Inc./Maxim Integrated MAX4645EUT-T
- Part No.:
- MAX4645EUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4645EUT-T.pdf
- Description:
- IC SWITCH SPST-NOX1 2.5OHM SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:4,851
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Product details
Overview
MAX4645EUT-T from Maxim Integrated is a single-pole, single-throw (SPST), normally open (NO) CMOS analog switch optimized for low-distortion signal routing. It delivers 2.5Ω typical on-resistance at +5V supply, 0.4Ω max on-resistance flatness over rail-to-rail signal range (0V to V+), and 8ns turn-off time - enabling high-fidelity audio switching and precision data-acquisition paths in battery-powered instrumentation.
For engineers reviewing the MAX4645EUT-T datasheet, MAX4645EUT-T pinout, MAX4645EUT-T application, or MAX4645EUT-T equivalent, this device is selected for low-voltage (1.8V–5V) operation, sub-nA leakage (<0.25nA at +25°C), and fast switching in space-constrained analog front-ends where mechanical relay replacement is required.
Technical Context
The MAX4645EUT-T implements a CMOS transmission-gate architecture with matched P/N-channel devices, enabling true rail-to-rail analog signal handling (VCOM, VNO = GND to V+). Its logic input is TTL/CMOS-compatible (VIH = 2.4V, VIL = 0.8V at +5V), and internal ESD protection supports ±2kV HBM without external components.
Switching dynamics are characterized by 12ns tON and 8ns tOFF (at V+ = 5V, CL = 35pF, RL = 300Ω), while charge injection is tightly controlled at 5pC (typ) - critical for sample-and-hold accuracy. Off-isolation reaches –75dB at 1MHz, ensuring minimal crosstalk in multi-channel routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 2.5Ω typ at +5V - ensures minimal voltage drop and signal attenuation in precision analog paths |
| On-Resistance Flatness | 0.4Ω max - maintains consistent gain and linearity across full 0V–V+ signal swing |
| Turn-Off Time (tOFF) | 8ns typ - enables high-speed multiplexing in >10MHz sampling systems |
| Off-Leakage Current | ±0.25nA max at +25°C - preserves DC accuracy in high-impedance sensor interfaces |
| Rail-to-Rail Signal Range | GND to V+ - supports full-scale signal routing without clipping in single-supply systems |
| Supply Voltage Range | +1.8V to +5.5V - allows direct integration into Li-ion (3.3V/3.7V) and USB-powered designs |
| Total Harmonic Distortion | 0.014% typ - meets fidelity requirements for audio-grade signal switching |
Pinout & Package
MAX4645EUT-T is housed in a 5-pin SOT23 package (JEDEC MO-178AA, 2.9mm × 1.6mm × 1.1mm), with pin 1 marked by embossed dot or alphanumeric code nearest pin 5. The package is RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Logic control input | Active-high digital enable: logic high connects COM to NO; logic low opens the switch |
| 2 - GND | Ground reference | Return path for logic and analog signals; must be low-impedance to minimize noise coupling |
| 3 - COM | Analog common terminal | Input/output node shared between switch path and system signal chain |
| 4 - NO | Normally open analog terminal | Only conducts when IN = high; isolated from COM when disabled |
| 5 - V+ | Positive supply | Single power rail powering both analog switch core and logic interface (1.8V–5.5V) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports full 0V to V+ signal range without distortion or clipping - essential for single-supply data acquisition |
| TTL/CMOS logic compatibility | Accepts standard 0.8V/2.4V logic thresholds at +5V supply - eliminates level-shifting in mixed-signal microcontroller interfaces |
| Low charge injection (5pC typ) | Minimizes voltage glitch on sampled nodes - critical for accurate hold-phase stability in SAR ADC front-ends |
| –75dB off-isolation at 1MHz | Suppresses crosstalk between active and inactive channels in multi-input audio/video routers |
| Guaranteed RON flatness (0.4Ω max) | Ensures <0.1% gain variation across signal range - required for calibrated sensor signal conditioning |
Applications
| Audio Signal Routing | Portable Data Acquisition |
|---|---|
Use Scenario: Switching between microphone inputs and line-level sources in Bluetooth headsets or voice-controlled IoT edge nodes. IC Role / Device Role / Timing Role: SPST analog switch controlling signal path selection under MCU GPIO control with <15ns timing resolution. Use Value: 0.014% THD and rail-to-rail operation preserve voice fidelity; 2.5Ω RON avoids gain mismatch between channels. |
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge outputs into a single 16-bit sigma-delta ADC in handheld test equipment. IC Role / Device Role / Timing Role: Low-leakage (±0.25nA) analog switch isolating high-impedance sensors during channel scanning. Use Value: Sub-nA leakage prevents DC offset errors; 0.4Ω RON flatness ensures consistent measurement accuracy across full temperature range. |
| Sample-and-Hold Circuits | Relay Replacement |
Use Scenario: Sampling analog sensor outputs at 100kSPS in battery-powered environmental monitors using discrete S/H topology. IC Role / Device Role / Timing Role: Fast-switching (12ns tON) gate for holding capacitor charging phase with minimal charge injection error. Use Value: 5pC charge injection limits hold-step error to <1LSB in 16-bit systems; 1.8V operation extends battery life. |
Use Scenario: Replacing electromechanical relays in automated test equipment (ATE) fixture I/O matrices requiring >1M cycle reliability. IC Role / Device Role / Timing Role: Solid-state SPST switch providing zero-bounce, millisecond-scale reconfiguration without coil drive circuitry. Use Value: 50mA continuous current rating supports 24V/100mA signal routing; 8ns tOFF enables rapid test sequence changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG801BRMZ-REEL | Lower RON (0.3Ω typ at 3V) but higher leakage (±1nA) and no 1.8V support | Better for low-RON precision DAC output switching; unsuitable for ultra-low-leakage sensor muxing | Select ADG801BRMZ-REEL only when RON <0.5Ω is mandatory and leakage >0.5nA is acceptable |
| TS5A23157DCUR | Higher RON (0.9Ω min at 3V), wider temp range (–40°C to +125°C), and dual SPDT configuration | Preferred for automotive body electronics requiring extended temperature operation and dual-path routing | Choose TS5A23157DCUR when dual-channel functionality or AEC-Q100 qualification is required |
Compared with ADG801BRMZ-REEL and TS5A23157DCUR, the MAX4645EUT-T uniquely balances 2.5Ω RON, ±0.25nA leakage, and 1.8V operation - making it optimal for portable medical sensors and battery-powered test gear where all three parameters are simultaneously constrained.
Availability
MAX4645EUT-T is available at Aetrix Electronics and suitable for battery-powered systems, audio signal routing, low-voltage data-acquisition systems, sample-and-hold circuits, and relay replacement applications requiring stable component supply and long-term sourcing continuity.
Supply support for MAX4645EUT-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 RF ICs for industrial, communications, computing, and consumer applications.
The MAX4645EUT-T belongs to Maxim's precision analog switch product line, engineered specifically for low-voltage, low-distortion signal routing in portable and space-constrained instrumentation.
FAQ
What is the maximum supply voltage rating for MAX4645EUT-T?
The MAX4645EUT-T has an absolute maximum supply voltage (V+) of +6V, but its specified operating range is +1.8V to +5.5V. Operation above +5.5V risks exceeding safe operating area limits and may cause permanent damage. For reliable long-term use, maintain V+ within 4.5V–5.5V when targeting 2.5Ω RON performance per the datasheet.
Does MAX4645EUT-T support rail-to-rail analog signals?
Yes, the MAX4645EUT-T supports true rail-to-rail analog signal operation: the COM and NO terminals accept and pass signals from GND to V+ without clipping or distortion. This capability is enabled by its CMOS transmission-gate design and is verified across the full –40°C to +85°C temperature range.
What is the logic polarity of MAX4645EUT-T?
The MAX4645EUT-T is a normally open (NO) switch with active-high logic control: applying a logic high (≥2.4V at +5V supply) to the IN pin closes the switch (COM ↔ NO), while logic low (≤0.8V) opens it. This matches standard microcontroller GPIO outputs without inversion logic.
Can MAX4645EUT-T operate from a 1.8V supply?
Yes, the MAX4645EUT-T is fully specified for 1.8V single-supply operation. At 1.8V, RON rises to 30Ω (typ) over temperature, tON/tOFF increase to 40ns/20ns (typ), and VIH/VIL shift to 1.2V/0.6V - all guaranteed per the datasheet's +1.8V electrical characteristics table.
Is MAX4645EUT-T pin-compatible with MAX4646EUT-T?
No, MAX4645EUT-T and MAX4646EUT-T are functionally complementary but not pin-compatible: MAX4645EUT-T is NO and MAX4646EUT-T is NC, sharing identical pinout and package (SOT23-5), but their truth tables are inverted. Swapping them requires logic inversion in the control signal to maintain functional equivalence.
MAX4645EUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 2.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 15ns, 10ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 17pF, 17pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4645EUT-T FAQ
1.How can I place an order for MAX4645EUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4645EUT-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 MAX4645EUT-T reliable?
The price and inventory of MAX4645EUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4645EUT-T is usually 5 days.
3.What payment methods are accepted for MAX4645EUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4645EUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4645EUT-T?
MAX4645EUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4645EUT-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 MAX4645EUT-T?
For technical support, including MAX4645EUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4645EUT-T requirements.
6.How does Aetrix verify that MAX4645EUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4645EUT-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 MAX4645EUT-T meets industry standards.
7.What is the process for return or replacement of MAX4645EUT-T?
All MAX4645EUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4645EUT-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 MAX4645EUT-T part is unused and in its original packaging.
Return procedure for MAX4645EUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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