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Analog Devices Inc./Maxim Integrated MAX350CPN
- Part No.:
- MAX350CPN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX350CPN.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM 18DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
MAX350CPN 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 rail-to-rail signal handling - used in industrial process control systems for flexible sensor signal aggregation.
For engineers reviewing the MAX350CPN datasheet, MAX350CPN pinout, MAX350CPN application, or MAX350CPN equivalent, this page delivers verified electrical specs, daisy-chain SPI-compatible interface timing, COMA/COMB dual-output architecture, off-leakage current at +85°C, and real-world audio routing and ATE use cases - all confirmed from Maxim's official 19-0451 Rev 1 datasheet.
Technical Context
The MAX350CPN 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 with CS-latched update. Its three-wire SPI/QSPI/MICROWIRE interface supports daisy-chaining via DOUT, enabling synchronized configuration of multiple devices.
Each switch exhibits matched on-resistance (≤16Ω max between channels) and flat on-resistance (≤10Ω max over ±3V signal range), with <0.1nA NO off-leakage at +25°C and 5nA at +85°C. Power-up defaults all switches OFF and resets the shift register to zero.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation in precision analog paths |
| On-resistance match | ≤16Ω max between channels - enables consistent gain/attenuation across selected inputs |
| Rail-to-rail signal range | V- to V+ - supports full dynamic range of bipolar or unipolar analog signals without clipping |
| Off-leakage current | 5nA max at +85°C - preserves accuracy in high-impedance sensor front-ends |
| Supply range | ±2.7V to ±8V dual or +2.7V to +16V single - accommodates legacy ±5V and modern low-voltage systems |
| Serial interface | SPI/QSPI/MICROWIRE-compatible 3-wire (DIN/SCLK/CS) with DOUT daisy-chain - reduces MCU GPIO count and simplifies multi-mux control |
| Turn-on time | 400ns max - enables fast channel switching in data-acquisition sampling sequences |
Pinout & Package
MAX350CPN is supplied in an 18-pin plastic DIP package (0°C to +70°C operating range). Pin functions are validated per Maxim's MAX349/MAX350 datasheet Figure 1 and Pin Description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 15, 16, 17, 18 | Digital I/O and power | SCLK, V+, DIN, GND, V-, DOUT, RESET, CS - define serial control interface and supply connections |
| 5, 10, 11, 12, 13, 14 | Analog terminals | COMA, NO0A–NO3A, COMB, NO0B–NO3B - form two independent 4:1 muxes with fully bidirectional signal paths |
| 9 | No-connect | N.C. - not internally connected; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-to-1 mux architecture | Enables simultaneous routing of two separate analog signal groups (e.g., temperature + pressure sensors) without crosstalk |
| Asynchronous RESET input | Guarantees known OFF state and cleared shift register on system reset - critical for fail-safe startup in industrial controllers |
| 2kV ESD protection (HBM) | Protects against handling damage and field transients in factory automation environments |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds ensure reliable interfacing with both 5V microcontrollers and mixed-voltage digital systems |
| Break-before-make delay | 2ns max - prevents momentary shorting during channel transitions in sensitive analog measurement circuits |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Aggregating voltage outputs from eight RTD or thermocouple signal conditioners into two ADC inputs. IC Role / Device Role / Timing Role: Dual 4:1 analog multiplexer routing conditioned sensor signals to shared ADC channels under microcontroller SPI command. Use Value: Reduces component count vs. discrete relays or single-channel muxes while maintaining ≤100Ω path resistance and <5nA leakage at elevated ambient temperatures. | Use Scenario: Switching calibration reference voltages and DUT signals into precision measurement circuitry during functional test sequences. IC Role / Device Role / Timing Role: High-isolation (≥90dB off-isolation) analog switch enabling accurate reference selection and DUT stimulus routing in boundary-scan test systems. Use Value: Achieves <−90dB channel-to-channel crosstalk and 400ns turn-on time - meeting tight timing windows in high-speed parametric test platforms. |
| Avionics Signal Management | Professional Audio Routing |
Use Scenario: Selecting among redundant flight sensor inputs (airspeed, altitude, attitude) for primary flight display processing units. IC Role / Device Role / Timing Role: Fault-tolerant analog multiplexer with asynchronous RESET ensuring safe default-OFF state during power-up or brownout events. Use Value: Supports MIL-STD-704 compliant ±2.7V to ±8V dual supplies and >2kV HBM ESD - meeting airborne environmental ruggedness requirements. | Use Scenario: Dynamically reconfiguring line-level audio inputs (mic preamps, instrument DI boxes, playback sources) to mixing console channels. IC Role / Device Role / Timing Role: Bidirectional rail-to-rail analog switch preserving full audio bandwidth (−3dB @ 1MHz) and minimizing THD (<0.01% at 1kHz). Use Value: Delivers ≤10Ω on-resistance flatness over ±3V signal range - preventing level shifts and distortion during live sound patching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-channel analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG732BRUZ | 32-channel, 16-bit parallel interface, 4Ω on-resistance, +3V to +5.5V only | Requires more PCB space and GPIO resources; lacks serial daisy-chain capability | Prefer when ultra-low RON and parallel control outweigh serial simplicity and dual-supply flexibility |
| TMUX1308PWR | Single 8:1 mux, no dual-output architecture, 5.5Ω on-resistance, SPI-compatible but no DOUT daisy-chain | Cannot replicate independent COMA/COMB routing; limited to single-path selection | Choose only if application requires exactly one 8:1 path and lower RON justifies loss of dual-mux topology |
Compared with ADG732BRUZ and TMUX1308PWR, MAX350CPN uniquely combines dual independent 4:1 routing, SPI daisy-chain support, wide supply range (±2.7V to ±8V), and guaranteed <5nA off-leakage at +85°C - making it optimal for space-constrained, multi-sensor industrial and avionics systems requiring deterministic power-up behavior.
Availability
MAX350CPN is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, avionics signal management, and professional audio routing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX350CPN 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, communications, and computing applications.
The MAX349/MAX350 product line delivers serially controlled analog multiplexers optimized for low-leakage, rail-to-rail signal routing in harsh environments - targeting data acquisition, sensor interfacing, and automated test systems where supply flexibility and deterministic startup are critical.
FAQ
What is the maximum allowable analog signal range for MAX350CPN when operated with ±5V supplies?
The MAX350CPN supports rail-to-rail analog signals from V− to V+, meaning −5V to +5V with ±5V supplies. This is explicitly specified in the "Analog Signal Range" parameter (VCOM, VNO) across dual-supply electrical characteristics tables, and confirmed by the "Rail-to-Rail® Signal Handling" feature. Operation outside this range risks latch-up or permanent damage per Absolute Maximum Ratings.
Does MAX350CPN support daisy-chaining multiple devices using a single SPI bus?
Yes, MAX350CPN supports daisy-chaining via its DOUT pin, which outputs the shifted-in data delayed by eight clock cycles. As described in the "Daisy-Chaining" section and Figure 5 of the datasheet, connecting DOUT of one MAX350CPN to DIN of the next allows cascading multiple devices with shared SCLK and CS lines - enabling synchronized configuration of up to N devices with only 3 MCU pins.
What is the guaranteed on-resistance match between channels for MAX350CPN at +25°C?
The MAX350CPN guarantees ≤16Ω maximum on-resistance match (∆RON = RON(max) − RON(min)) between any two channels at +25°C under ±5V supplies, as specified in the "ELECTRICAL CHARACTERISTICS-Dual Supplies" table. This parameter ensures predictable gain tracking in multi-channel instrumentation amplifier front-ends.
How does the RESET pin function on MAX350CPN, and what state does it force?
The RESET pin on MAX350CPN is asynchronous and active-low. When driven low, it forces all analog switches to the OFF state and resets the internal 8-bit shift register to zero - regardless of CS or SCLK state. This behavior is documented in the "General Description" and "Pin Description" sections, ensuring a known safe state during power sequencing or fault recovery.
Can MAX350CPN operate from a single +5V supply, and what are the key performance trade-offs?
Yes, MAX350CPN operates from a single +5V supply (V− = GND), supporting analog signals from 0V to +5V. Key trade-offs include higher on-resistance (175Ω max vs. 100Ω max at ±5V) and reduced off-isolation (≥90dB vs. >90dB), as shown in the "ELECTRICAL CHARACTERISTICS-Single +5V Supply" table. These are direct consequences of MOSFET threshold voltage effects under unipolar bias.
MAX350CPN 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 18-PDIP
MAX350CPN FAQ
1.How can I place an order for MAX350CPN through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350CPN 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 MAX350CPN reliable?
The price and inventory of MAX350CPN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350CPN is usually 5 days.
3.What payment methods are accepted for MAX350CPN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350CPN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350CPN?
MAX350CPN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350CPN 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 MAX350CPN?
For technical support, including MAX350CPN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350CPN requirements.
6.How does Aetrix verify that MAX350CPN is sourced from the original manufacturer or authorized distributors?
All MAX350CPN 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 MAX350CPN meets industry standards.
7.What is the process for return or replacement of MAX350CPN?
All MAX350CPN units undergo pre-shipment inspection (PSI). If there is an issue with MAX350CPN, 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 MAX350CPN part is unused and in its original packaging.
Return procedure for MAX350CPN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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