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Analog Devices Inc./Maxim Integrated MAX394CWP
- Part No.:
- MAX394CWP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX394CWP.pdf
- Description:
- IC SWITCH SPDT X 4 35OHM 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,169
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Product details
Overview
MAX394CWP from Analog Devices is a precision quad SPDT analog switch optimized for low-voltage, rail-to-rail signal routing in portable and test equipment. It operates from ±2.7V to ±8V bipolar or +2.7V to +15V single supply, delivers <35Ω max on-resistance with <2Ω channel matching, <4Ω flatness over signal range, and break-before-make switching (10ns typ). It enables high-fidelity audio routing and multiplexing in battery-powered instrumentation.
For engineers reviewing the MAX394CWP datasheet, MAX394CWP pinout, MAX394CWP application, or MAX394CWP equivalent, this page provides verified electrical specifications, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts - all grounded in Analog Devices' official MAX394 datasheet Rev 3 (1/21) and package documentation W26-1.
Technical Context
The MAX394CWP integrates four independent CMOS SPDT switches fabricated using Maxim's low-voltage silicon-gate process. Each switch features matched on-resistance (<2Ω), guaranteed flat RON (Δ4Ω max), and ultra-low charge injection (<10pC), enabling precision signal path control without distortion or settling error.
It supports TTL/CMOS-compatible logic inputs (0.8V–2.4V at ≤+8V supplies; up to +4V at higher V+), rail-to-rail analog signal handling (V− to V+), and operates across 0°C to +70°C. Dynamic performance includes tON <130ns and tOFF <75ns, with ESD robustness >2000V per Method 3015.7.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (max) | <35Ω at ±4.5V supplies - ensures minimal signal attenuation and gain error in precision analog paths |
| On-Resistance Match | <2Ω between channels - enables accurate differential signal switching and ratiometric measurements |
| Charge Injection | <10pC - prevents voltage glitches and settling errors in sample-hold or multiplexed ADC front-ends |
| Off-Leakage Current | <2.5nA at +85°C - preserves signal integrity in high-impedance sensor interfaces and battery-monitoring circuits |
| Supply Range | ±2.7V to ±8V or +2.7V to +15V - supports both dual-rail precision systems and single-supply portable designs |
| Logic Compatibility | TTL/CMOS input thresholds (0.8V/2.4V) - allows direct interfacing with microcontrollers and FPGAs without level shifters |
| ESD Rating | >2000V HBM - enhances reliability in benchtop test equipment and field-deployable instruments |
Pinout & Package
MAX394CWP is housed in a 20-pin Wide SO (SOIC-W) package per package code W26-1, with 0.3" body width and standard 1.27mm pitch. Pin 15 is not internally connected (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 (Pins 1,10,11,20) | Logic control inputs | Enable/disable individual SPDT switches; TTL/CMOS compatible with defined VIH/VIL thresholds |
| NO1–NO4 (Pins 2,9,12,19) | Normally open switch terminals | Connect to COM when corresponding IN = logic high; isolated otherwise |
| COM1–COM4 (Pins 3,8,13,18) | Common analog signal poles | Carry routed analog signals; support rail-to-rail operation from V− to V+ |
| NC1–NC4 (Pins 4,7,14,17) | Normally closed switch terminals | Connected to COM when corresponding IN = logic low; open otherwise |
| V+ (Pin 16) | Positive power supply | Accepts +2.7V to +15V (single) or ±2.7V to ±8V (dual); must be applied before analog/logic signals |
| V− (Pin 5) | Negative power supply | Required for bipolar operation; absolute max V+ − V− = 17V |
| GND (Pin 6) | Ground reference | System ground connection; substrate tied to V+ per chip topography |
| N.C. (Pin 15) | No internal connection | Must be left unconnected; no electrical function or thermal role |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports input/output signals spanning full V− to V+ range - eliminates clipping in wide-dynamic-range audio and sensor applications |
| Break-before-make switching | Guaranteed 10ns typical delay prevents momentary short-circuits during channel transitions - critical for fault-tolerant multiplexing |
| Ultra-low quiescent current | <1μA total with all inputs high/low - extends battery life in portable instruments and handheld testers |
| Guaranteed flat on-resistance | Δ4Ω max over full analog signal range - maintains consistent gain and linearity across signal amplitude |
| Pin compatibility with MAX333/MAX333A | Enables drop-in replacement in legacy designs without PCB revision - reduces redesign cost and time-to-market |
Applications
| Audio Signal Routing | Portable Instrument Multiplexing |
|---|---|
|
Use Scenario: Switching between multiple microphone inputs or headphone outputs in a handheld audio analyzer. IC Role / Device Role / Timing Role: Quad SPDT analog switch managing bidirectional audio paths with minimal THD and crosstalk. Use Value: <35Ω RON and <10pC charge injection preserve signal fidelity; rail-to-rail operation supports ±5V op-amp stages without level shifting. |
Use Scenario: Selecting among four sensor inputs (thermocouple, RTD, strain gauge, pH electrode) in a battery-powered field tester. IC Role / Device Role / Timing Role: Low-leakage analog multiplexer routing high-impedance sensor signals to a shared ADC front-end. Use Value: <2.5nA off-leakage at +85°C prevents measurement drift; <2Ω channel matching enables precise ratiometric calibration. |
| Test Equipment Channel Selection | Heads-Up Display Signal Conditioning |
|
Use Scenario: Configuring signal paths in automated test equipment (ATE) for DUT stimulus/response routing. IC Role / Device Role / Timing Role: Precision analog switch providing fast, glitch-free channel selection under microcontroller control. Use Value: tON/tOFF <130ns/75ns enables high-throughput test sequencing; >2000V ESD protects against lab handling damage. |
Use Scenario: Routing video sync, RGB, and brightness control signals in an avionics HUD with strict EMI and reliability requirements. IC Role / Device Role / Timing Role: Robust analog switch handling mixed-signal timing-critical paths in safety-critical displays. Use Value: Break-before-make architecture prevents signal contention; wide temperature range (0°C to +70°C) ensures stable operation in cockpit environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX333ACPP | Same pinout, but rated for 0°C to +70°C only; slightly higher RON (45Ω max) and lower ESD rating (1500V) | Suitable for cost-sensitive industrial controls where extended temp or ESD margin is non-critical | Use when footprint compatibility is mandatory and performance margins allow minor RON/ESD trade-offs |
| ADG1414BRUZ | 16-pin TSSOP, 4-channel SPDT, 1.8Ω typical RON, but requires ≥±4.5V or +9V min supply; no single-supply operation below +9V | Better matching and lower RON, but incompatible with +3.3V or ±3V systems where MAX394CWP excels | Select for high-precision, high-voltage systems needing superior on-resistance flatness and lower leakage |
Compared with MAX333ACPP, MAX394CWP offers tighter RON matching and higher ESD tolerance; compared with ADG1414BRUZ, it supports lower supply voltages and single-supply operation down to +2.7V - making it uniquely suited for portable and low-power analog routing.
Availability
MAX394CWP is available at Aetrix Electronics and suitable for test equipment, portable instrumentation, communications systems, and heads-up display designs requiring stable component supply and long-term manufacturability.
Supply support for MAX394CWP 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 (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX394 belongs to Maxim's precision analog switch product line, designed specifically for low-distortion, low-leakage, rail-to-rail signal routing in portable, test, and instrumentation applications where signal integrity and power efficiency are critical.
FAQ
What supply voltage ranges does the MAX394CWP support?
The MAX394CWP supports bipolar supplies from ±2.7V to ±8V and single supplies from +2.7V to +15V. Its rail-to-rail analog signal capability allows input/output signals to swing fully between V− and V+, making it ideal for both precision dual-rail systems and compact single-supply portable devices. Absolute maximum V+ − V− is 17V.
Is the MAX394CWP pin-compatible with other Maxim analog switches?
Yes, the MAX394CWP is pin-compatible with the MAX333 and MAX333A in the same 20-pin Wide SO package. This allows direct substitution in existing designs without PCB layout changes, provided operating conditions (voltage, temperature, signal range) remain within MAX394CWP specifications.
What is the maximum on-resistance specification for MAX394CWP at room temperature?
At +25°C and ±4.5V supplies, the MAX394CWP guarantees a maximum on-resistance of 35Ω. Typical RON is 20Ω under those conditions. The device also guarantees <2Ω matching between channels and Δ4Ω flatness over the full analog signal range - critical for precision multiplexing.
How does the MAX394CWP handle logic-level inputs across different supply voltages?
The MAX394CWP logic inputs are TTL/CMOS compatible: for supplies ≤+8V, VIH is guaranteed ≥0.8V and VIL ≤2.4V; for supplies >+8V, input thresholds scale to ~0.8V to ~4V. Input current remains <±1.0μA across temperature, ensuring low loading on driving logic sources.
What is the significance of break-before-make switching in the MAX394CWP?
Break-before-make switching in the MAX394CWP ensures that the normally open (NO) and normally closed (NC) paths are never simultaneously conductive during state transitions. With a typical delay of 10ns, it prevents momentary shorts between signal sources - essential for protecting sensitive circuitry in test equipment and multi-source routing applications.
MAX394CWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 15V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 130ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF, 12pF
- Current - Leakage (IS(off)) (Max):
- 200pA
- Crosstalk:
- -88dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MAX394CWP FAQ
1.How can I place an order for MAX394CWP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX394CWP 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 MAX394CWP reliable?
The price and inventory of MAX394CWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX394CWP is usually 5 days.
3.What payment methods are accepted for MAX394CWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX394CWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX394CWP?
MAX394CWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX394CWP 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 MAX394CWP?
For technical support, including MAX394CWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX394CWP requirements.
6.How does Aetrix verify that MAX394CWP is sourced from the original manufacturer or authorized distributors?
All MAX394CWP 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 MAX394CWP meets industry standards.
7.What is the process for return or replacement of MAX394CWP?
All MAX394CWP units undergo pre-shipment inspection (PSI). If there is an issue with MAX394CWP, 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 MAX394CWP part is unused and in its original packaging.
Return procedure for MAX394CWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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