My Inquiry
My Account
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:6,548
Please send an inquiry. Send us your inquiry, and we will respond immediately.
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, 12ns turn-on time, and rail-to-rail analog signal handling - enabling precise switching in battery-powered audio, data-acquisition, and sample-and-hold circuits.
For engineers reviewing the MAX4645EUT+T datasheet, MAX4645EUT+T pinout, MAX4645EUT+T application, or MAX4645EUT+T equivalent, key selection criteria include guaranteed RON flatness over voltage/temperature, sub-nA leakage at +25°C, TTL/CMOS logic compatibility, -75dB off-isolation at 1MHz, and SOT23-5 package constraints for space-constrained PCB layouts.
Technical Context
The MAX4645EUT+T uses complementary MOSFET architecture to achieve rail-to-rail conduction with minimal distortion (0.014% THD). Its control logic directly drives the gate of the transmission FET pair without level-shifting, ensuring fast 12ns tON/8ns tOFF response under +5V supply.
On-resistance variation is tightly controlled via matched FET sizing and process trimming, yielding ≤0.4Ω flatness across 0V to V+ signal range. Internal ESD protection diodes clamp COM/NO terminals to V+ and GND, supporting safe operation with signals exceeding supply rails by ±0.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 2.5Ω typical at V+ = 5V - ensures minimal signal attenuation and voltage drop in precision analog paths |
| On-Resistance Flatness | 0.4Ω max over full signal range - maintains consistent gain and linearity across input voltage swing |
| Turn-On / Turn-Off Time | 12ns / 8ns at V+ = 5V - supports high-speed multiplexing in data-acquisition and communications systems |
| Off-Leakage Current | ±0.25nA max at +25°C - preserves accuracy in high-impedance sample-and-hold and sensor interfaces |
| Off-Isolation | -75dB at 1MHz - suppresses crosstalk between inactive channels in multi-signal routing applications |
| Supply Voltage Range | +1.8V to +5.5V - enables direct integration into Li-ion, coin-cell, and mixed-voltage embedded systems |
| Logic Compatibility | TTL/CMOS - simplifies interface with microcontrollers, FPGAs, and standard digital logic without level shifters |
Pinout & Package
MAX4645EUT+T is housed in a 5-pin SOT23 package (JEDEC MO-178AA), with 1.6mm × 2.9mm footprint and 0.95mm height. Pin 1 is marked by lettering nearest the device corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Logic Control Input | Active-high TTL/CMOS-compatible enable signal; drives internal switch gate directly |
| 2 - NO | Normally Open Terminal | Analog path connects to COM only when IN = HIGH; floating when disabled |
| 3 - GND | Ground Reference | Return path for logic and analog circuitry; must be low-impedance for leakage and noise control |
| 4 - COM | Common Analog Terminal | Shared I/O node; connects to NO when enabled, isolated otherwise |
| 5 - V+ | Positive Supply | Single power rail for analog and logic sections; supports 1.8V–5.5V operation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Signal Handling | Supports analog inputs from GND to V+ without clipping or distortion - critical for full-scale ADC/DAC interfacing |
| Low Charge Injection (5pC) | Minimizes voltage glitch on sampled nodes - essential for high-resolution sample-and-hold and switched-capacitor circuits |
| Guaranteed RON at 3V & 5V | 3.5Ω max at 3V, 2.5Ω max at 5V - enables predictable performance across battery discharge profiles |
| Low THD (0.014% typ) | Preserves signal fidelity in audio and instrumentation paths - avoids harmonic contamination in sensitive measurements |
| 100% Production Tested Leakage | ±0.25nA off-leakage verified at +85°C and correlated at +25°C - ensures reliability in long-duration monitoring systems |
Applications
| Audio Signal Routing | Portable Data Acquisition |
|---|---|
|
Use Scenario: Selecting between multiple microphone or line-level inputs in a handheld recorder or voice-controlled IoT device. IC Role / Device Role: SPST analog switch providing low-noise, low-distortion signal path selection before ADC. Use Value: 0.014% THD and rail-to-rail operation preserve dynamic range; 2.5Ω RON avoids gain error in high-Z sensor interfaces. |
Use Scenario: Multiplexing thermistor, RTD, or bridge sensor outputs into a single SAR ADC channel in field-deployed condition monitors. IC Role / Device Role: Low-leakage analog switch isolating inactive sensors to prevent loading and measurement drift. Use Value: ±0.25nA off-leakage ensures <1µV error in 10MΩ sensor bridges; 12ns switching enables rapid channel scanning. |
| Sample-and-Hold Circuits | Battery-Powered Relay Replacement |
|
Use Scenario: Capturing transient analog waveforms in portable oscilloscopes or power quality analyzers using switched-capacitor hold stages. IC Role / Device Role: Precision switch controlling charge transfer to hold capacitor with minimal injection error. Use Value: 5pC charge injection limits hold-step error to <5mV on 1nF capacitors - enabling 12-bit+ effective resolution. |
Use Scenario: Replacing electromechanical relays in automated test equipment (ATE) fixtures or industrial PLC I/O modules. IC Role / Device Role: Solid-state SPST switch delivering faster cycling, zero bounce, and no contact wear. Use Value: 12ns/8ns switching enables >10MHz test sequencing; 50mA continuous current supports solenoid driver bias paths. |
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 | 2.3Ω RON (typ), 0.3Ω flatness, but only rated for +1.8V to +5.5V with 100mA peak current - lacks guaranteed 0.25nA leakage spec at +25°C | Higher bandwidth (−3dB @ 200MHz) but higher THD (0.025%) - better for RF sampling, less ideal for precision DC-coupled acquisition | Select ADG801BRMZ-REEL when ultra-low RON and speed outweigh leakage-critical DC accuracy requirements. |
| TS5A23157DCKR | 0.9Ω RON (typ) at 3V, but 1.5Ω flatness and −55dB off-isolation at 1MHz - no guaranteed RON spec below 3V | Lower supply current (I+ = 0.1µA vs. 0.1nA for MAX4645EUT+T) - suitable for always-on sensor nodes where leakage dominates battery life | Choose TS5A23157DCKR for cost-sensitive, high-speed, low-RON applications where leakage tolerance exceeds ±1nA. |
Compared with ADG801BRMZ-REEL and TS5A23157DCKR, the MAX4645EUT+T provides tighter leakage control and flatter RON across temperature - making it preferred for precision, low-power, DC-coupled analog signal routing where measurement integrity is non-negotiable.
Availability
MAX4645EUT+T is available at Aetrix Electronics and suitable for battery-powered systems, audio/video signal routing, and low-voltage data-acquisition systems requiring stable component supply across extended temperature ranges (−40°C to +85°C).
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 precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX4645EUT+T belongs to Maxim's high-performance analog switch family, engineered specifically for low-distortion, low-leakage, rail-to-rail signal routing in space- and power-constrained portable systems.
FAQ
What is the maximum allowable analog signal voltage range for MAX4645EUT+T?
The MAX4645EUT+T supports rail-to-rail analog signals from GND to V+, with absolute maximum ratings allowing COM/NO voltages up to (V+ + 0.3V) or as low as −0.3V relative to GND. This means at V+ = 5V, the device safely handles signals from −0.3V to +5.3V, leveraging internal clamping diodes - critical for robustness in mismatched signal chain interfaces.
Does MAX4645EUT+T require external bypass capacitors?
While not strictly required, a 0.1µF ceramic capacitor from V+ to GND is recommended for MAX4645EUT+T to improve noise margin and suppress switching transients from propagating to adjacent circuitry. This simple addition stabilizes supply impedance during fast 12ns transitions and is especially valuable in mixed-signal PCB layouts shared with ADCs or PLLs.
How does MAX4645EUT+T perform at 1.8V supply voltage?
At +1.8V supply, the MAX4645EUT+T remains fully functional with RON ≈ 30Ω (typ) and tON/tOFF ≈ 40ns/20ns (typ), maintaining TTL/CMOS logic compatibility. Its guaranteed operation down to 1.8V makes MAX4645EUT+T suitable for ultra-low-power coin-cell or energy-harvesting systems where supply headroom is minimal.
Is MAX4645EUT+T pin-compatible with MAX4646EUT+T?
No - MAX4645EUT+T (normally open) and MAX4646EUT+T (normally closed) share identical pinouts in the SOT23-5 package, but their logic polarity and default states differ. Swapping them requires inverting the control signal and verifying system-level behavior, as MAX4645EUT+T conducts only when IN = HIGH, while MAX4646EUT+T conducts when IN = LOW.
What is the thermal resistance (θJA) of MAX4645EUT+T in SOT23-5 package?
The MAX4645EUT+T in SOT23-5 has a junction-to-ambient thermal resistance (θJA) of 140°C/W, derived from its 571mW maximum power dissipation at +70°C ambient and 7.1mW/°C derating above that temperature. This value assumes standard JEDEC 2-layer board conditions and confirms suitability for continuous operation in compact, unventilated enclosures up to +85°C ambient.
MAX4645EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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.
MAX4645EUT+T Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
