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Analog Devices Inc./Maxim Integrated MAX349EPN+
- Part No.:
- MAX349EPN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX349EPN+.pdf
- Description:
- IC MULTIPLEXER 8X1 18DIP
- Quantity:
- Payment:
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Inventory:2,013
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Product details
Overview
The MAX349EPN+ from Maxim Integrated is an 8-channel, serially controlled, bidirectional analog multiplexer with SPI/QSPI/MICROWIRE interface, 100Ω max on-resistance (±5V supplies), ±2.7V to ±8V dual or +2.7V to +16V single supply operation, and rail-to-rail signal handling - used in industrial data-acquisition systems for low-leakage, high-isolation analog channel selection.
For engineers reviewing the MAX349EPN+ datasheet, MAX349EPN+ pinout, MAX349EPN+ application, or MAX349EPN+ equivalent, this page delivers verified electrical specs, daisy-chainable serial timing, -40°C to +85°C extended temperature performance, and precise switch-level design meaning for analog routing in ATE and avionics signal paths.
Technical Context
The MAX349EPN+ implements an 8-bit shift register architecture where DIN data is clocked in on SCLK rising edges while CS is low; DOUT provides daisy-chain capability by outputting the same data delayed by eight clocks. All eight switches update synchronously on the rising edge of CS, independent of SCLK state.
It supports break-before-make switching with 2ns typical delay, 100Ω matched on-resistance (≤16Ω mismatch), and flat on-resistance (≤10Ω variation) over ±3V signal range. Off-isolation exceeds -90dB at 100kHz, and channel crosstalk is < -90dB under matched 50Ω/15pF conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal voltage drop and gain error in precision signal paths up to ±3V swing. |
| On-Resistance Match (∆RON) | 16Ω max between channels - enables accurate ratiometric measurements across selected inputs without calibration. |
| Off-Leakage Current | 0.1nA at +25°C, 5nA at +85°C - preserves integrity of high-impedance sensor nodes and low-current measurement circuits. |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - supports flexible system-level power architecture including battery-powered and industrial rails. |
| Turn-On/Off Time | 400ns/300ns typical - enables fast channel scanning in time-critical data acquisition at >1MHz effective sample rates. |
| Off-Isolation | >90dB at 100kHz - prevents signal coupling between unselected channels in multi-signal routing applications. |
| ESD Protection | >2kV per Method 3015.7 - sustains robustness during board handling and system integration without external protection. |
Pinout & Package
MAX349EPN+ is supplied in an 18-pin plastic DIP package (0.3-inch width), RoHS-compliant, with through-hole mounting and operating temperature range of -40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Serial clock input | Synchronizes DIN data sampling on rising edge; supports up to 2.1MHz clock rate for high-throughput configuration. |
| 2 V+ | Positive analog supply | Accepts +2.7V to +16V (single) or +4.5V to +5.5V (dual); powers analog switch core and digital interface logic. |
| 3 DIN | Serial data input | Accepts 8-bit control word; MSB-first (D7 first) for deterministic switch-state programming. |
| 4 GND | Digital ground reference | Reference for all digital I/O; analog signals are rail-to-rail referenced only to V+ and V-, not GND. |
| 5 COM | Common analog terminal | Bidirectional mux output; connects to any enabled NOx channel; interchangeable with NO pins as input/output. |
| 6–13 NO0–NO7 | Normally open analog terminals | Eight independent bidirectional analog inputs/outputs; each connects to COM when corresponding bit = 1 in shift register. |
| 15 V- | Negative analog supply | Accepts -2.7V to -8V (dual) or 0V (single supply); sets lower analog signal limit and switch bias point. |
| 16 DOUT | Serial data output | Shift register output; enables daisy-chaining multiple MAX349EPN+ devices using single SCLK/DIN/CS bus. |
| 17 RESET | Asynchronous reset input | Active-low; forces all switches OFF and clears internal shift register to 00000000 on assertion. |
| 18 CS | Chip-select input | Active-low; latches 8-bit configuration into analog switch control on rising edge; gates serial data flow. |
Key Features
| Feature | Design Value |
|---|---|
| SPI/QSPI/MICROWIRE-compatible interface | Three-wire serial protocol with guaranteed timing margins (tDS ≥17ns, tDH ≥0ns at +25°C) for reliable microcontroller integration. |
| 8 independently controllable SPST switches | Each NOx–COM path functions as a discrete bidirectional switch; no shared conduction path - avoids channel interaction during partial selection. |
| Rail-to-Rail® signal handling | Supports analog signals from V- to V+ (e.g., -5V to +5V or 0V to +12V), enabling full dynamic range utilization in mixed-supply systems. |
| Asynchronous RESET input | Hardware-initiated fail-safe recovery: clears latch state and disables all channels within nanoseconds, critical for safety-critical routing. |
| ±2.7V to ±8V dual / +2.7V to +16V single supply | Eliminates need for level-shifting circuitry when interfacing with legacy ±5V, modern 3.3V, or high-voltage industrial analog subsystems. |
Applications
| Industrial Data-Acquisition Systems | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing outputs from 8 RTD or thermocouple front-ends into a single ADC channel in a modular PLC rack. IC Role / Device Role / Timing Role: Analog multiplexer providing low-leakage, matched-path switching with simultaneous channel update via CS edge. Use Value: Enables 8:1 analog consolidation without gain/offset drift from on-resistance mismatch or temperature-induced leakage drift. | Use Scenario: Selecting between redundant inertial measurement unit (IMU) analog outputs for flight control arbitration logic. IC Role / Device Role / Timing Role: Fault-tolerant analog switch with asynchronous RESET for immediate channel isolation during sensor fault detection. Use Value: Guarantees sub-500ns channel reconfiguration and >90dB off-isolation to prevent erroneous cross-coupling in safety-critical feedback loops. |
| ATE Equipment Channel Selection | Audio Signal Routing |
Use Scenario: Routing DUT analog stimulus/response signals among multiple test instruments in a semiconductor ATE platform. IC Role / Device Role / Timing Role: High-isolation, low-charge-injection multiplexer supporting daisy-chained configuration for synchronized multi-site testing. Use Value: Delivers <0.2pC charge injection and <10Ω on-resistance flatness - preserving waveform fidelity for precision AC parametric tests. | Use Scenario: Switching line-level audio inputs (±2Vpp) between microphone preamps and codec inputs in a professional audio mixer ASIC. IC Role / Device Role / Timing Role: Bidirectional rail-to-rail analog switch with TTL/CMOS-compatible digital interface for FPGA-controlled routing. Use Value: Supports ±5V analog swing with 100Ω RON and <–90dB crosstalk - preventing audible inter-channel bleed in multi-track recording paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG708BRUZ | 8-channel CMOS mux, 3.5Ω on-resistance (±5V), but only supports +1.8V to +5.5V single supply; no dual-supply capability. | Not suitable for ±5V or higher analog signal ranges; limited to low-voltage portable audio or sensor interfaces. | Select ADG708BRUZ only when system uses ≤5.5V single supply and requires ultra-low RON; MAX349EPN+ remains preferred for industrial dual-rail designs. |
| TMUX6208RUMR | 8-channel mux with 3.1Ω RON, ±16.5V supply support, but requires 1.8V–5.5V logic supply separate from analog rails; no integrated RESET. | Lacks asynchronous hardware reset and daisy-chain DOUT - increases firmware complexity for fault recovery and multi-device sync. | Choose TMUX6208RUMR for ultra-low RON in high-voltage test equipment; retain MAX349EPN+ when RESET, SPI compatibility, and supply flexibility are mandatory. |
Compared with ADG708BRUZ and TMUX6208RUMR, the MAX349EPN+ uniquely combines extended dual-supply operation, hardware RESET, and daisy-chainable serial interface - making it optimal for ruggedized, multi-device, wide-swing analog routing where reliability and configurability outweigh ultra-low on-resistance requirements.
Availability
MAX349EPN+ is available at Aetrix Electronics and suitable for industrial data-acquisition systems, avionics signal routing, and ATE equipment requiring stable component supply across extended temperature and dual-supply environments.
Supply support for MAX349EPN+ 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, automotive, and communications applications.
The MAX349EPN+ belongs to Maxim's serially controlled analog switch/multiplexer product line, engineered for high-reliability, low-leakage, rail-to-rail analog signal routing in harsh-temperature and mixed-supply environments.
FAQ
What is the maximum analog signal range supported by the MAX349EPN+?
The MAX349EPN+ supports rail-to-rail analog signals from V− to V+, enabling operation from −5V to +5V with dual ±5V supplies or 0V to +12V with a +12V single supply. Its specified analog signal range is guaranteed from (V− − 2V) to (V+ + 2V), allowing safe margin beyond supply rails for transient handling.
Does the MAX349EPN+ support daisy-chaining with other MAX349EPN+ devices?
Yes, the MAX349EPN+ supports daisy-chaining via its DOUT pin, which outputs the same serial data stream delayed by eight clock cycles. Multiple MAX349EPN+ devices can share SCLK, DIN, and CS lines, with DOUT of one device connected to DIN of the next - enabling synchronized configuration of up to N devices with a single 8×N-bit serial word.
What is the function of the RESET pin on the MAX349EPN+?
The RESET pin on the MAX349EPN+ is an asynchronous active-low input that forces all eight switches to the OFF state and clears the internal 8-bit shift register to 00000000. This provides deterministic hardware-level recovery without requiring serial communication, essential for fail-safe analog path isolation in safety-critical systems.
Can the MAX349EPN+ operate with a single +3.3V supply?
Yes, the MAX349EPN+ operates with a single +3.3V supply (within +2.7V to +16V range). At +3.3V, typical on-resistance rises to ~400Ω (vs. 100Ω at ±5V), and timing parameters such as tON increase to ~700ns. Logic thresholds remain compatible: VIH = 2.4V min, VIL = 0.8V max - ensuring reliable interface with standard 3.3V microcontrollers.
How does the MAX349EPN+ ensure channel-to-channel isolation during switching?
The MAX349EPN+ achieves <−90dB channel-to-channel crosstalk and >90dB off-isolation at 100kHz by combining low-capacitance construction (CCOM(OFF) = 10pF, CNO(OFF) = 10pF), break-before-make timing (2ns typical), and matched on-resistance. These features minimize capacitive coupling and transient feedthrough between adjacent channels during dynamic reconfiguration.
MAX349EPN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX349EPN+ FAQ
1.How can I place an order for MAX349EPN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX349EPN+ 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 MAX349EPN+ reliable?
The price and inventory of MAX349EPN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX349EPN+ is usually 5 days.
3.What payment methods are accepted for MAX349EPN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX349EPN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX349EPN+?
MAX349EPN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX349EPN+ 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 MAX349EPN+?
For technical support, including MAX349EPN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX349EPN+ requirements.
6.How does Aetrix verify that MAX349EPN+ is sourced from the original manufacturer or authorized distributors?
All MAX349EPN+ 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 MAX349EPN+ meets industry standards.
7.What is the process for return or replacement of MAX349EPN+?
All MAX349EPN+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX349EPN+, 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 MAX349EPN+ part is unused and in its original packaging.
Return procedure for MAX349EPN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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