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Analog Devices Inc./Maxim Integrated MAX350EWN
- Part No.:
- MAX350EWN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX350EWN.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM 18SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,898
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Product details
Overview
MAX350EWN from Maxim Integrated is a dual 4-channel serially controlled analog multiplexer with bidirectional signal routing, 100Ω max on-resistance (±5V supplies), ±2.7V to ±8V dual-supply or +2.7V to +16V single-supply operation, and SPI/QSPI/MICROWIRE-compatible 3-wire interface. It enables rail-to-rail analog switching in industrial data-acquisition and avionics signal routing systems.
For engineers reviewing the MAX350EWN datasheet, MAX350EWN pinout, MAX350EWN application, or MAX350EWN equivalent, this page delivers verified electrical specs, daisy-chain timing behavior, COMA/COMB dual-output architecture, -40°C to +85°C extended temperature rating, and real-world leakage/flatness performance under dual- and single-supply conditions.
Technical Context
The MAX350EWN implements two independent 4-to-1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B) controlled by an 8-bit shift register clocked on SCLK rising edge while CS is low. Each switch supports bidirectional rail-to-rail signal handling with matched on-resistance (≤16Ω) and flatness (≤10Ω) over ±3V input range.
Its asynchronous RESET input forces all switches OFF and clears the shift register; DOUT provides daisy-chain capability by outputting the first bit (D7) after eight clocks. Logic thresholds (0.8V/2.4V) ensure TTL/CMOS compatibility with ±5V or +5V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Configuration | Dual 4-to-1 SPST mux (COMA/NO0A–NO3A and COMB/NO0B–NO3B) |
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation in precision analog paths |
| On-Resistance Match | ≤16Ω between channels - critical for gain-matching in multi-channel instrumentation |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - supports legacy ±5V and modern low-voltage systems |
| Off-Leakage Current | 0.1nA at +25°C, 5nA at +85°C - preserves accuracy in high-impedance sensor front-ends |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 3-wire (CS/SCLK/DIN/DOUT) - enables microcontroller integration without protocol translation |
| Operating Temperature | -40°C to +85°C - qualified for industrial and avionics environments |
Pinout & Package
MAX350EWN uses an 18-pin wide SO (SOIC-W) package with exposed pad (not electrically connected). Pin 14 is N.C. (not internally connected); pins 10 and 16 are also N.C. Power sequencing requires V+ before V− during startup.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 18 | CS | Chip-select active-low - latches shift-register contents on rising edge to update switch states |
| 2 | V+ | Positive analog supply - must be ≥|V−| for rail-to-rail operation; powers internal logic and analog path |
| 3 | DIN | Serial data input - synchronous with SCLK rising edge; MSB (D7) first |
| 4 | GND | Digital ground reference - separate from analog signal return; no analog ground connection required |
| 5 | COMA | Common output for "A" mux group - connects to NO0A–NO3A when selected; bidirectional |
| 6–9 | NO0A–NO3A | Normally open inputs for "A" mux - interchangeable as input/output; matched RON enables precision routing |
| 11–14 | NO3B–NO0B | Normally open inputs for "B" mux - inverted numbering vs. "A" group per datasheet pin diagram |
| 15 | V− | Negative analog supply - tied to GND for single-supply use; defines lower analog signal limit |
| 16 | DOUT | Serial data output - D7 delayed by 8 clocks; enables daisy-chaining multiple MAX350s |
| 17 | RESET | Asynchronous reset - drives all switches OFF and clears shift register regardless of CS/SCLK state |
| 18 | CS | Chip-select - shared with pin 1; rising edge updates switch configuration |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail® signal handling | Supports analog signals from V− to V+ - eliminates level-shifting in ±5V or +12V systems |
| Dual independent 4-to-1 muxes | COMA/NO0A–NO3A and COMB/NO0B–NO3B operate simultaneously - enables parallel channel selection |
| Break-before-make switching | Guaranteed 1ns–10ns delay prevents momentary shorting - safe for multiplexing voltage sources |
| 2kV ESD protection | Per Method 3015.7 - enhances robustness in handling-sensitive industrial test equipment |
| Low charge injection (≤160pC) | Minimizes transient glitches during switching - critical for sample-and-hold and ADC front-end stability |
Applications
| Industrial Data-Acquisition Systems | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing 8 thermocouple or RTD sensor outputs into a single high-resolution ADC channel. IC Role / Device Role / Timing Role: Dual 4-to-1 analog mux providing isolated, low-leakage signal paths with matched on-resistance for calibrated gain consistency. Use Value: Enables 8-channel scanning at <1µV offset error due to ≤0.1nA off-leakage and ≤16Ω RON match across temperature. | Use Scenario: Routing pilot control signals (pitch/roll/yaw) between redundant flight computers and actuator interfaces. IC Role / Device Role / Timing Role: Fault-tolerant analog switch with break-before-make timing and >2kV ESD protection for airborne environments. Use Value: Ensures signal integrity during hot-swap reconfiguration with <10ns tBBM and -40°C to +85°C operation. |
| ATE Equipment Channel Selection | Audio Signal Routing |
Use Scenario: Selecting DUT test points in automated test systems requiring fast, repeatable analog path configuration. IC Role / Device Role / Timing Role: Serially controlled mux with 400ns turn-on time and daisy-chain capability for synchronized multi-board testing. Use Value: Reduces test cycle time via 8-bit parallel update (tON = 400ns) and eliminates manual relay wiring. | Use Scenario: Switching line-level audio inputs (mic, instrument, digital) to a common amplifier stage in pro-audio mixers. IC Role / Device Role / Timing Role: Low-distortion analog switch with <0.01% THD at 1kHz and rail-to-rail swing for full dynamic range. Use Value: Preserves audio fidelity with 100Ω RON flatness (≤10Ω) and <160pC charge injection to prevent pop/click artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1414BRUZ | Single 8-channel mux (not dual 4-channel); 1.8Ω typical RON; requires 2.7V–5.5V single supply only | Lacks dual independent outputs and dual-supply support - unsuitable for ±5V avionics or split-rail industrial sensors | Select when ultra-low on-resistance and single-supply simplicity outweigh dual-output flexibility |
| TS5A3159DCKR | Single SPDT switch; 0.75Ω typical RON; 1.65V–5.5V supply; no serial interface | No shift register, no daisy-chaining, no multi-channel control - requires GPIO-per-switch implementation | Select for point-to-point switching where serial control and channel count are unnecessary |
Compared with ADG1414BRUZ and TS5A3159DCKR, the MAX350EWN uniquely delivers dual independent 4-to-1 routing, ±8V dual-supply operation, and SPI-compatible serial control in one 18-pin SO package - essential for space-constrained, multi-signal industrial and aerospace systems.
Availability
MAX350EWN 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 ranges.
Supply support for MAX350EWN 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX350EWN belongs to Maxim's serially controlled analog switch/multiplexer product line, engineered for high-accuracy signal routing in systems requiring rail-to-rail operation, low leakage, and microcontroller-compatible digital control.
FAQ
What is the maximum allowable supply voltage range for the MAX350EWN?
The MAX350EWN supports dual supplies from ±2.7V to ±8V or a single supply from +2.7V to +16V. Absolute maximum ratings specify V+ up to +17V and V− down to -17V, but functional operation is guaranteed only within the specified ranges. Exceeding ±8V or +16V risks permanent damage and violates the device's qualified operating envelope.
How does the MAX350EWN handle bidirectional analog signal routing?
The MAX350EWN allows signals to pass equally well in either direction between COMA/COMB and their respective NOx terminals because its CMOS switches have symmetric construction. This means NO0A can serve as input while COMA acts as output, or vice versa - enabling flexible signal flow in both acquisition and drive applications without polarity constraints.
Can multiple MAX350EWN devices be daisy-chained, and how is it implemented?
Yes, multiple MAX350EWN devices can be daisy-chained using the DOUT pin. Connect DOUT of one device to DIN of the next, tie all CS pins together, and shift 8 bits per device in sequence. On the rising edge of CS, all devices simultaneously latch their respective 8-bit words - enabling synchronized configuration of large analog switch matrices without additional control lines.
What is the purpose of the RESET pin on the MAX350EWN, and how does it interact with the serial interface?
The RESET pin on the MAX350EWN is asynchronous and forces all analog switches OFF while clearing the internal 8-bit shift register to zero - independent of CS or SCLK state. This provides deterministic power-up or fault-recovery behavior. Unlike CS-based updates, RESET requires only a low pulse ≥70ns and does not depend on serial clocking or data alignment.
Does the MAX350EWN support single-supply operation, and what are the analog signal limitations in that mode?
Yes, the MAX350EWN supports single-supply operation with V− tied to GND and V+ ranging from +2.7V to +16V. In this mode, analog signals must stay within 0V to V+, and on-resistance increases (e.g., 225Ω max at +5V) compared to dual-supply operation. Rail-to-rail functionality is preserved, but leakage and flatness specifications differ per supply configuration as documented in the datasheet's single-supply electrical characteristics tables.
MAX350EWN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 16Ohm (Max)
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 275ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-SOIC
MAX350EWN FAQ
1.How can I place an order for MAX350EWN through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350EWN 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 MAX350EWN reliable?
The price and inventory of MAX350EWN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350EWN is usually 5 days.
3.What payment methods are accepted for MAX350EWN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350EWN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350EWN?
MAX350EWN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350EWN 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 MAX350EWN?
For technical support, including MAX350EWN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350EWN requirements.
6.How does Aetrix verify that MAX350EWN is sourced from the original manufacturer or authorized distributors?
All MAX350EWN 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 MAX350EWN meets industry standards.
7.What is the process for return or replacement of MAX350EWN?
All MAX350EWN units undergo pre-shipment inspection (PSI). If there is an issue with MAX350EWN, 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 MAX350EWN part is unused and in its original packaging.
Return procedure for MAX350EWN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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