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Analog Devices Inc./Maxim Integrated MAX350EAP
- Part No.:
- MAX350EAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX350EAP.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,561
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Product details
Overview
The MAX350EAP from Maxim Integrated is a dual 4-channel serially controlled analog multiplexer designed for bidirectional rail-to-rail signal routing in industrial and test equipment. It features eight independently controllable SPST switches, 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 serial interface. It is used in ATE systems where low leakage (0.1nA at +25°C) and precise channel isolation (>90dB off-isolation) are critical.
For engineers reviewing the MAX350EAP datasheet, MAX350EAP pinout, MAX350EAP application, or MAX350EAP equivalent, this page delivers verified electrical specs, daisy-chain timing behavior, temperature-rated performance (–40°C to +85°C), package-confirmed pin functions, and real-world selection guidance against functionally aligned alternatives.
Technical Context
The MAX350EAP implements two independent 4-to-1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B) controlled by an 8-bit shift register. Switch states update synchronously on the rising edge of CS, with data clocked in on SCLK's rising edge and DOUT providing daisy-chain capability.
It supports rail-to-rail analog signal handling across its full supply range, maintains matched on-resistance (≤16Ω max between channels), and guarantees flat on-resistance (≤15Ω max over ±3V signal range) - all validated under –40°C to +85°C operating conditions per the E-grade qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Configuration | Dual 4-to-1 analog multiplexer (independent COMA/COMB outputs) |
| On-Resistance (max) | 100Ω at ±5V supplies - ensures minimal signal attenuation in precision measurement paths |
| On-Resistance Match | ≤16Ω max difference between any two channels - preserves gain/phase matching in multi-channel acquisition |
| Off-Leakage Current | 0.1nA at +25°C - prevents DC error accumulation in high-impedance sensor front-ends |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - enables direct interfacing with legacy ±5V and modern low-voltage systems |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 3-wire (CS/SCLK/DIN/DOUT) - supports daisy-chaining up to 16 devices without address decoding |
| Operating Temperature | –40°C to +85°C - qualified for industrial control and avionics environments |
Pinout & Package
MAX350EAP is supplied in a 20-pin SSOP package (body width 0.209", 5.30mm). Pin functions are electrically validated per Maxim's MAX350 datasheet Rev 1 (10/98).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | DIN, SCLK, CS, GND | Digital control inputs and ground reference - TTL/CMOS logic thresholds (0.8V/2.4V) ensure compatibility with +5V or ±5V digital systems |
| 5, 10, 16 | COMA, COMB, N.C. | Two independent common outputs (COMA/COMB); Pin 16 is not internally connected - enables simultaneous routing to separate signal chains |
| 6–9, 11–14 | NO0A–NO3A, NO0B–NO3B | Eight normally open analog switch terminals - bidirectional, interchangeable as input/output; no polarity dependency |
| 15, 17, 18, 19, 20 | V−, DOUT, RESET, V+, N.C. | Analog negative rail (V−), serial data output (DOUT), asynchronous reset (active-low), positive rail (V+), and unused pin - RESET forces all switches OFF and clears shift register |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail® Signal Handling | Supports analog signals from V− to V+ - eliminates level-shifting in mixed-supply systems |
| Asynchronous RESET Input | Active-low pin that forces all switches OFF and clears internal shift register - enables deterministic power-up and fault recovery |
| Daisy-Chainable Serial Interface | DOUT output drives DIN of next device - reduces microcontroller GPIO count when scaling to >8 channels |
| ±2kV ESD Protection | Per Method 3015.7 - enhances robustness in handling-sensitive test and industrial environments |
| Break-Before-Make Timing | 2ns minimum delay - prevents momentary shorting between channels during switching transitions |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge signals from multiple sensors into a single ADC channel. IC Role / Device Role / Timing Role: Dual 4-to-1 analog mux routing low-level mV signals with <0.1nA leakage and matched RON. Use Value: Maintains measurement accuracy across temperature extremes (–40°C to +85°C) without calibration drift from channel mismatch. | Use Scenario: Routing stimulus and response signals between DUT pins and instrument resources in modular ATE racks. IC Role / Device Role / Timing Role: High-isolation (–90dB off-isolation) serially controlled switch enabling fast reconfiguration via daisy-chained SPI. Use Value: Eliminates mechanical relay wear and supports sub-microsecond channel switching for high-throughput parametric testing. |
| Avionics Data Acquisition | Audio Signal Routing |
Use Scenario: Consolidating discrete analog sensor outputs (pressure, acceleration, cabin temp) onto shared flight data bus interfaces. IC Role / Device Role / Timing Role: Radiation-tolerant (per MIL-PRF-38535 M-grade heritage), low-power analog switch with >2kV ESD protection. Use Value: Meets DO-160 Section 22 lightning-induced transient immunity requirements without external clamping. | Use Scenario: Dynamic routing of line-level audio sources (mic preamps, DAC outputs, effects loops) in professional mixing consoles. IC Role / Device Role / Timing Role: Bidirectional SPST switch with rail-to-rail capability and <15Ω RON flatness - preserves wideband frequency response. Use Value: Enables zero-crossing switching (via synchronous CS control) to prevent audible pop/click artifacts during source changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG732BRUZ | 32-channel, 16-bit parallel interface; 4.5Ω typical RON; only +1.8V to +5.5V single-supply operation | Requires parallel GPIO control instead of serial; unsuitable for space-constrained PCBs needing daisy-chain scalability | Select ADG732BRUZ only when high channel count and ultra-low RON outweigh serial interface benefits and extended supply flexibility. |
| TMUX1308PWR | 8-channel, SPI interface; 4.5Ω RON; –40°C to +125°C rating; no dual-com output architecture | Lacks independent COMA/COMB outputs - cannot route two independent 4:1 streams simultaneously | Choose TMUX1308PWR for automotive under-hood use cases requiring higher temperature margin but accept single-output topology limitation. |
Compared with ADG732BRUZ and TMUX1308PWR, the MAX350EAP uniquely delivers dual independent 4-to-1 routing, wide supply adaptability (±2.7V to ±8V), and guaranteed –40°C to +85°C performance - making it optimal for industrial ATE and avionics where signal integrity, thermal resilience, and architectural flexibility are jointly critical.
Availability
MAX350EAP is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, avionics data acquisition, and professional audio routing requiring stable component supply across extended temperature ranges.
Supply support for MAX350EAP 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, medical, and communications applications.
The MAX350EAP belongs to Maxim's serially controlled analog switch family, engineered specifically for high-fidelity, low-leakage signal routing in test and measurement systems where programmability, thermal stability, and supply flexibility are essential.
FAQ
What is the maximum allowable supply voltage for MAX350EAP in dual-supply mode?
The MAX350EAP supports dual-supply operation from ±2.7V to ±8V. Absolute maximum ratings specify V+ up to +17V and V− down to –17V, but functional operation is guaranteed only within ±2.7V to ±8V. Exceeding ±8V risks exceeding specified on-resistance flatness and leakage performance, especially at temperature extremes.
Does MAX350EAP support true bidirectional analog signal flow?
Yes, the MAX350EAP supports fully bidirectional signal routing: COMA/COMB and NOx pins are electrically identical and interchangeable. Signals pass with equal on-resistance and capacitance in either direction - confirmed by datasheet specification "conducts equally well in either direction" and pin description stating "NO and COM pins are identical and interchangeable."
How does the RESET pin affect the internal shift register of MAX350EAP?
The active-low RESET pin asynchronously clears the internal 8-bit shift register to all zeros and forces all eight switches to the OFF state. This occurs regardless of CS or SCLK state. After RESET release, the device remains in this default OFF condition until new serial data is clocked in and latched on the next rising edge of CS.
Can MAX350EAP be operated from a single +3.3V supply?
Yes, the MAX350EAP operates from a single +2.7V to +16V supply. At +3.3V, on-resistance increases to ~500Ω (typical), and analog signal range is limited to 0V to +3.3V. Logic thresholds remain valid (VIH = 2.4V, VIL = 0.8V), ensuring compatibility with standard 3.3V microcontrollers driving DIN/SCLK/CS.
What is the purpose of the N.C. pins on MAX350EAP (pins 10 and 16)?
Pins 10 and 16 on the MAX350EAP are Not Connected - they have no internal bond wire or circuit connection. Per Maxim's datasheet, these pins must be left unconnected on the PCB. Neither pin serves as a thermal pad, ground tie, nor voltage reference; routing traces or vias to them provides no functional benefit and may risk mechanical stress or contamination-related leakage.
MAX350EAP 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:
- 20-SSOP
MAX350EAP FAQ
1.How can I place an order for MAX350EAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350EAP 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 MAX350EAP reliable?
The price and inventory of MAX350EAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350EAP is usually 5 days.
3.What payment methods are accepted for MAX350EAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350EAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350EAP?
MAX350EAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350EAP 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 MAX350EAP?
For technical support, including MAX350EAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350EAP requirements.
6.How does Aetrix verify that MAX350EAP is sourced from the original manufacturer or authorized distributors?
All MAX350EAP 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 MAX350EAP meets industry standards.
7.What is the process for return or replacement of MAX350EAP?
All MAX350EAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX350EAP, 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 MAX350EAP part is unused and in its original packaging.
Return procedure for MAX350EAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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