My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4644EUT+T
- Part No.:
- MAX4644EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4644EUT+T.pdf
- Description:
- IC SWITCH SPDT X 1 4OHM SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:6,113
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX4644EUT+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 handling - deployed in audio routing, battery-powered data acquisition, and sample-and-hold circuits.
For engineers reviewing the MAX4644EUT+T datasheet, MAX4644EUT+T pinout, MAX4644EUT+T application, or MAX4644EUT+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 SOT23-6 package compatibility with space-constrained portable designs.
Technical Context
This SPDT switch uses BiCMOS process technology to achieve low RON and high-speed switching while maintaining TTL/CMOS-compatible logic inputs (VIH = 2.4V, VIL = 0.8V at +5V). Its internal logic-level translators drive analog gates directly from V+ and GND, enabling bidirectional signal flow across COM–NO and COM–NC paths.
The device implements break-before-make switching with tBBM ≤ 8ns (typ) at +5V, ensuring no momentary short between NO and NC. ESD protection diodes are integrated between each analog pin and both V+ and GND, limiting analog-signal voltage to within ±0.3V of supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - supports direct integration into 1.8V, 3.3V, and 5V systems without level shifters |
| On-Resistance (RON) | 4Ω max at +5V - ensures minimal signal attenuation and voltage drop in precision analog paths |
| RON Flatness | 0.75Ω typ at +5V - maintains consistent gain and linearity across full 0V to V+ analog input range |
| Turn-On/Off Time | tON = 18ns typ, tOFF = 12ns typ at +5V - enables high-speed multiplexing in sampling and communications circuits |
| Leakage Current | <0.35nA over –40°C to +85°C - preserves accuracy in high-impedance sensor interfaces and sample-and-hold hold phases |
| Off-Isolation | –80dB at 1MHz - suppresses crosstalk between active and inactive signal paths in multi-channel routing |
| Charge Injection | 5pC - limits voltage glitch on hold capacitors, critical for sub-12-bit ADC front-end stability |
Pinout & Package
MAX4644EUT+T is housed in a RoHS-compliant 6-pin SOT23 package (top mark: AAHQ), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 115°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Digital control input | Active-high TTL/CMOS-compatible logic signal that selects NO (IN = HIGH) or NC (IN = LOW) |
| 2 - GND | Ground reference | Return path for analog signals and digital logic; must be low-impedance for leakage and noise control |
| 3 - NO | Analog output (normally open) | Connects to COM only when IN = HIGH; bidirectional signal path with 12pF off-capacitance |
| 4 - COM | Analog common terminal | Central bidirectional I/O node; carries full analog signal range (0V to V+) with 4Ω RON |
| 5 - NC | Analog output (normally closed) | Connects to COM only when IN = LOW; matched RON (0.1Ω typ vs. NO) enables channel balancing |
| 6 - V+ | Positive supply | +1.8V to +5.5V analog/digital power; requires local 0.1μF bypass to GND for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog operation | Supports 0V to V+ signal swing without clipping - essential for full-scale audio and sensor outputs |
| Break-before-make timing | tBBM ≤ 8ns ensures no overlap between NO and NC conduction - prevents short-circuit transients in power-sensitive systems |
| Low charge injection (5pC) | Minimizes hold capacitor voltage error in sample-and-hold stages, preserving DC accuracy |
| High off-isolation (–80dB @ 1MHz) | Reduces interference between adjacent channels in multi-source audio/video routing |
| TTL/CMOS logic compatibility | Valid at +5V supply (VIH = 2.4V, VIL = 0.8V) - simplifies interface with microcontrollers and FPGAs |
Applications
| Audio Signal Routing | Portable Data Acquisition |
|---|---|
Use Scenario: Switching between multiple microphone or line-level inputs in Bluetooth headsets and voice-controlled wearables. IC Role / Device Role / Timing Role: SPDT analog switch selecting one of two analog sources to a shared ADC or amplifier input. Use Value: 4Ω RON and 0.75Ω flatness preserve SNR and THD (0.018%) across full audio band; 18ns switching enables real-time source handoff. | Use Scenario: Multiplexing sensor outputs (thermistor, accelerometer, ambient light) into a low-power MCU's single ADC channel. IC Role / Device Role / Timing Role: Low-leakage (<0.35nA), rail-to-rail SPDT switch enabling accurate DC-coupled measurements from high-Z sensors. Use Value: Sub-nA leakage prevents bias current errors; +1.8V operation extends battery life in coin-cell-powered IoT nodes. |
| Sample-and-Hold Circuits | Communications Signal Switching |
Use Scenario: Controlling acquisition phase in precision instrumentation amplifiers feeding 12-bit SAR ADCs. IC Role / Device Role / Timing Role: Fast, low-charge-injection switch isolating hold capacitor during sampling and connecting it to signal source during acquisition. Use Value: 5pC charge injection limits hold-step error to <1LSB for 12-bit conversion at 1V full scale; 12ns tOFF minimizes aperture jitter. | Use Scenario: Selecting between RF front-end test signals and antenna paths in cellular baseband evaluation boards. IC Role / Device Role / Timing Role: High-isolation SPDT switch routing IF or baseband analog signals in LTE/Wi-Fi transceiver calibration loops. Use Value: –80dB off-isolation at 1MHz suppresses LO feedthrough; 34pF on-capacitance maintains bandwidth in 10MHz signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG849BCPZ-REEL7 | 3Ω RON max at +5V; 1.2nA leakage at +85°C; 10ns tON; LFCSP-6 package (2mm × 2mm) | Lower RON and faster switching, but higher leakage than MAX4644EUT+T at temperature extremes | Preferred for ultra-low-distortion audio where RON matching and speed outweigh leakage sensitivity |
| TS5A23157DCUR | 0.9Ω RON max at +5V; 10ns tON; 1.5nA leakage at +85°C; same SOT23-6 footprint | Superior RON and speed, but leakage exceeds MAX4644EUT+T by >4× at +85°C | Best for high-bandwidth, low-RON routing where thermal drift is managed externally |
Compared with ADG849BCPZ-REEL7 and TS5A23157DCUR, the MAX4644EUT+T offers the lowest leakage (<0.35nA) over –40°C to +85°C and guaranteed RON flatness (0.75Ω), making it optimal for precision, wide-temperature portable instrumentation where signal integrity trumps raw speed.
Availability
MAX4644EUT+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 industrial temperature ranges.
Supply support for MAX4644EUT+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX4644 belongs to Maxim's precision analog switch product line, engineered for low-leakage, low-RON, and fast-switching performance in portable and battery-sensitive systems.
FAQ
What is the maximum supply voltage rating for the MAX4644EUT+T?
The MAX4644EUT+T has an absolute maximum supply voltage (V+) rating of +6V. However, its specified operational range is +1.8V to +5.5V. Operation above +5.5V risks permanent damage, and functional performance is only guaranteed within the +1.8V to +5.5V range per the datasheet's Electrical Characteristics tables. The MAX4644EUT+T must never be biased beyond +6V, even transiently.
Does the MAX4644EUT+T support rail-to-rail analog signal switching?
Yes, the MAX4644EUT+T supports true rail-to-rail analog signal switching - its analog terminals (COM, NO, NC) operate from 0V to V+ with no degradation in RON or distortion. This is confirmed in the "Analog-Signal Range" parameter (0V to V+) and validated by typical RON vs. VCOM curves showing stable resistance across the full range. The MAX4644EUT+T achieves this using BiCMOS architecture with complementary switch elements.
What is the guaranteed RON flatness specification for the MAX4644EUT+T at +5V supply?
The guaranteed RON flatness for the MAX4644EUT+T at +5V supply is 1Ω maximum (with 0.75Ω typical), defined as the difference between maximum and minimum on-resistance measured over the full 0V to V+ analog signal range. This value is explicitly listed in the "ELECTRICAL CHARACTERISTICS-Single +5V Supply" table under RFLAT, and is critical for minimizing harmonic distortion in audio and precision measurement applications. The MAX4644EUT+T maintains this flatness across –40°C to +85°C.
Is the MAX4644EUT+T pin-compatible with the MAX4644EUA+T?
No, the MAX4644EUT+T (SOT23-6) is not pin-compatible with the MAX4644EUA+T (μMAX-8). Their pin counts, layouts, and terminal assignments differ: the SOT23-6 uses pins 1(IN), 2(GND), 3(NO), 4(COM), 5(NC), 6(V+), while the μMAX-8 adds two no-connect (N.C.) pins and relocates GND and V+. PCB layout, footprint, and routing must be redesigned when substituting between these packages. The MAX4644EUT+T requires its own dedicated SOT23-6 land pattern.
What is the typical charge injection value for the MAX4644EUT+T, and why does it matter?
The typical charge injection value for the MAX4644EUT+T is 5pC, measured at V+ = 5V and VCOM = 2.5V. This parameter quantifies the net charge transferred to the COM node during switching transitions, directly causing voltage glitches on hold capacitors in sample-and-hold circuits. At 5pC, the MAX4644EUT+T limits hold-step error to under 1LSB for 12-bit, 1V-full-scale systems with ≤500pF capacitance - a key reason it is selected for precision data acquisition. The MAX4644EUT+T's 5pC is guaranteed over temperature.
MAX4644EUT+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:
- SOT-6
MAX4644EUT+T FAQ
1.How can I place an order for MAX4644EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4644EUT+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 MAX4644EUT+T reliable?
The price and inventory of MAX4644EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4644EUT+T is usually 5 days.
3.What payment methods are accepted for MAX4644EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4644EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4644EUT+T?
MAX4644EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4644EUT+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 MAX4644EUT+T?
For technical support, including MAX4644EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4644EUT+T requirements.
6.How does Aetrix verify that MAX4644EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX4644EUT+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 MAX4644EUT+T meets industry standards.
7.What is the process for return or replacement of MAX4644EUT+T?
All MAX4644EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4644EUT+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 MAX4644EUT+T part is unused and in its original packaging.
Return procedure for MAX4644EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4644EUT+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…
