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Analog Devices Inc./Maxim Integrated MAX323CUA+
- Part No.:
- MAX323CUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX323CUA+.pdf
- Description:
- IC SWITCH SPST-NOX2 60OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:207
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Product details
Overview
MAX323CUA+ from Analog Devices is a precision dual normally open (NO) single-pole single-throw (SPST) analog switch IC operating from +2.7V to +16V single supply. It delivers 60Ω max on-resistance, <2Ω channel-to-channel RON matching, and 150ns max turn-on time. Designed for low-leakage signal routing in battery-powered instrumentation and audio/video switching paths.
For engineers reviewing the MAX323CUA+ datasheet, MAX323CUA+ pinout, MAX323CUA+ application, or MAX323CUA+ equivalent, key selection criteria include guaranteed RON flatness (<6Ω), 5pC max charge injection, 100pA max off-leakage at +25°C, and µMAX-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX323CUA+ implements two independent SPST switches with TTL/CMOS-compatible logic inputs and bidirectional analog signal paths. Its internal architecture ensures break-before-make operation is not implemented-unlike the MAX325-making it suitable for non-overlapping signal routing where simultaneous conduction must be avoided.
It operates across 0°C to +70°C ambient, supports rail-to-rail analog signals (0V to V+), and maintains low leakage (<2.5nA at +85°C) via integrated protection diodes. Power consumption remains below 5μW, enabling use in always-on sensor interfaces and portable test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +16V - enables direct interface with 3.3V, 5V, and 12V systems without level-shifting |
| Max On-Resistance (RON) | 60Ω at +25°C, 5V supply - ensures minimal signal attenuation and gain error in precision ADC/DAC paths |
| RON Matching | <2Ω between channels - critical for matched gain/phase in differential or dual-path signal conditioning |
| Charge Injection | ≤5pC - limits voltage glitch in sample-and-hold and multiplexed data acquisition circuits |
| Off-Leakage Current | ≤100pA at +25°C - preserves accuracy in high-impedance sensor front-ends and battery-monitoring nodes |
| Switching Speed | tON ≤150ns, tOFF ≤100ns - supports multiplexing of audio-band and medium-speed control signals |
| ESD Rating | >2000V per Method 3015.7 - provides robust handling during board assembly and field service |
Pinout & Package
MAX323CUA+ uses the 8-pin µMAX package (pin pitch 0.65mm, body size 3.05mm × 3.05mm × 0.95mm), optimized for high-density PCB layouts and thermal performance in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NO1 | Normally open analog terminal of Switch 1 - connects to COM1 only when IN1 = logic high |
| 2 | COM1 | Common analog node for Switch 1 - bidirectional path between NO1 and circuit load/source |
| 3 | IN2 | Logic input controlling Switch 2 - active-high, TTL/CMOS compatible at 5V supply |
| 4 | GND | Analog and digital ground reference - must be low-impedance return for leakage-sensitive applications |
| 5 | NO2 | Normally open analog terminal of Switch 2 - connects to COM2 only when IN2 = logic high |
| 6 | COM2 | Common analog node for Switch 2 - isolated from COM1; enables dual independent signal paths |
| 7 | IN1 | Logic input controlling Switch 1 - referenced to GND; drives internal CMOS transmission gate |
| 8 | V+ | Positive supply rail - powers internal bias circuitry and defines analog signal range (0V to V+) |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance flatness | <6Ω variation over full 0V–V+ analog range - minimizes harmonic distortion in audio routing |
| Guaranteed low charge injection | ≤5pC - prevents step errors in precision sample-and-hold and switched-capacitor filters |
| Single-supply operation | +2.7V to +16V range - eliminates need for dual supplies in mixed-voltage embedded systems |
| TTL/CMOS logic compatibility | Valid at 5V supply with VINH ≥2.4V, VINL ≤0.8V - simplifies interface with microcontrollers and FPGAs |
| Ultra-low power consumption | <5μW quiescent - extends battery life in portable medical monitors and handheld test gear |
Applications
| Battery-Operated Instrumentation | Audio Signal Routing |
|---|---|
|
Use Scenario: Multiplexing sensor outputs in portable gas analyzers with 10-year battery life requirements. IC Role / Device Role / Timing Role: Dual SPST switch isolating thermistor and electrochemical sensor paths before ADC sampling. Use Value: 100pA max off-leakage prevents DC offset drift; 5μW power enables continuous background monitoring. |
Use Scenario: Channel selection in professional headset amplifiers supporting stereo + mic inputs. IC Role / Device Role / Timing Role: Bidirectional analog switch routing line-level audio between codec and jack detection circuitry. Use Value: 60Ω RON and <6Ω flatness preserve frequency response; 5pC charge injection avoids pop/click artifacts. |
| Test Equipment Multiplexing | Guidance System Signal Conditioning |
|
Use Scenario: Automated calibration sequence in handheld multimeters switching between voltage, current, and resistance ranges. IC Role / Device Role / Timing Role: Precision analog switch enabling reconfigurable front-end gain and attenuation networks. Use Value: <2Ω RON matching ensures consistent scaling across ranges; 150ns switching supports fast auto-ranging. |
Use Scenario: Isolating inertial measurement unit (IMU) analog outputs in UAV flight controllers during power-up sequencing. IC Role / Device Role / Timing Role: Normally open switch preventing backfeed from unpowered subsystems into powered IMU rails. Use Value: 2000V ESD rating withstands harsh electromagnetic environments; rail-to-rail analog range accommodates ±5V sensor outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX323CSA+ | Same electrical specs; SO-8 package (4.9mm × 3.9mm) vs. µMAX-8 (3.05mm × 3.05mm) | Preferred for manual assembly or thermal dissipation >330mW required | Select MAX323CSA+ when board layout allows larger footprint and higher power derating is needed. |
| ADG1419BRMZ | Lower RON (0.9Ω typ), but dual-supply only (±5V/±15V); no single +3.3V/+5V operation | Requires dual supply rails and level shifters for microcontroller logic interfacing | Choose ADG1419BRMZ only if ultra-low RON is mandatory and system already supports dual supplies. |
Compared with MAX323CSA+, the MAX323CUA+ saves 39% board area while maintaining identical analog performance; versus ADG1419BRMZ, it eliminates dual-supply complexity but trades 59× higher RON for single-supply simplicity and lower system cost.
Availability
MAX323CUA+ is available at Aetrix Electronics and suitable for battery-operated instrumentation, audio signal routing, and test equipment multiplexing requiring stable component supply across extended production lifecycles.
Supply support for MAX323CUA+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX323CUA+ belongs to the MAX32x family of precision single-supply analog switches, engineered for low-leakage, low-distortion signal routing in portable and space-constrained systems where power efficiency and signal integrity are critical.
FAQ
What is the maximum analog signal voltage range supported by the MAX323CUA+?
The MAX323CUA+ supports analog signals from 0V to V+, where V+ is the positive supply rail. When V+ = 5V, the full analog range is 0V to 5V; at V+ = 12V, it extends to 0V to 12V. This rail-to-rail capability eliminates external level-shifting in most single-supply systems and is confirmed in the Electrical Characteristics table under "Analog Signal Range" with VCOM/VNO/VNC = 0 to V+.
Does the MAX323CUA+ support break-before-make switching?
No, the MAX323CUA+ does not implement break-before-make timing. It is a dual normally open (NO) switch with independent control inputs (IN1, IN2). Break-before-make behavior is exclusive to the MAX325 variant, as explicitly stated in the Features section and Pin Configurations diagram. Using MAX323CUA+ for overlapping switch control requires external timing coordination.
Can the MAX323CUA+ operate from a 3.3V supply while maintaining TTL logic compatibility?
TTL compatibility is guaranteed only at +5V supply, per the datasheet's Logic Levels section. At 3.3V, logic thresholds shift: VINH must reach ≥3.3V and VINL ≤0V for reliable switching. Driving inputs rail-to-rail (0V/3.3V) is required-not TTL levels (0.8V/2.4V)-to ensure correct operation and minimize power consumption in the MAX323CUA+.
What is the thermal derating specification for the MAX323CUA+ µMAX package?
The MAX323CUA+ µMAX package has a thermal derating factor of 4.10mW/°C above +70°C, with a maximum continuous power dissipation of 330mW at +70°C. This means usable power drops linearly: at +85°C, max dissipation is 330mW − (15°C × 4.10mW/°C) = 268.5mW. This value is specified in the Absolute Maximum Ratings table under "Continuous Power Dissipation."
How does the MAX323CUA+ compare to the MAX323CPA+ in terms of performance and packaging?
The MAX323CUA+ and MAX323CPA+ share identical electrical specifications-including RON, leakage, switching speed, and supply range-but differ only in package: µMAX-8 (3.05mm × 3.05mm) vs. plastic DIP-8 (9.91mm × 6.10mm). The MAX323CUA+ offers 83% smaller footprint and superior thermal resistance for high-density designs, while the CPA+ version eases hand-soldering and prototyping.
MAX323CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 60Ohm
- Channel-to-Channel Matching (ΔRon):
- 800mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 9pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX323CUA+ FAQ
1.How can I place an order for MAX323CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX323CUA+ 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 MAX323CUA+ reliable?
The price and inventory of MAX323CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX323CUA+ is usually 5 days.
3.What payment methods are accepted for MAX323CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX323CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX323CUA+?
MAX323CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX323CUA+ 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 MAX323CUA+?
For technical support, including MAX323CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX323CUA+ requirements.
6.How does Aetrix verify that MAX323CUA+ is sourced from the original manufacturer or authorized distributors?
All MAX323CUA+ 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 MAX323CUA+ meets industry standards.
7.What is the process for return or replacement of MAX323CUA+?
All MAX323CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX323CUA+, 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 MAX323CUA+ part is unused and in its original packaging.
Return procedure for MAX323CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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