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Analog Devices Inc./Maxim Integrated MAX350C/D
- Part No.:
- MAX350C/D
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- Die
- Datasheet:
-
MAX350C/D.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM DIE
- Quantity:
- Payment:
- Shipping:
Inventory:1,805
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Product details
Overview
The MAX350C/D from Maxim Integrated is a dual 4-channel serially controlled analog multiplexer, implementing two independent 4-to-1 muxes (COMA/NO0A–NO3A and COMB/NO0B–NO3B) with bidirectional rail-to-rail signal handling, 100Ω max on-resistance at ±5V supplies, <16Ω channel matching, and SPI/QSPI/MICROWIRE-compatible 3-wire interface - used in precision data-acquisition systems requiring low-leakage (<0.1nA @ +25°C) and high off-isolation (>90dB).
For engineers reviewing the MAX350C/D datasheet, MAX350C/D pinout, MAX350C/D application, or MAX350C/D equivalent, this page delivers verified electrical specs, daisy-chain timing behavior, dual/single-supply operating ranges (±2.7V to ±8V or +2.7V to +16V), reset-controlled power-up state, and real-world analog routing use cases.
Technical Context
The MAX350C/D operates as two independent 4-bit shift-register-controlled SPST switch arrays, each with dedicated common (COMA/COMB) and normally open (NO0A–NO3A / NO0B–NO3B) terminals. Its internal logic decodes 8-bit serial data (D7–D0) where bits D7–D4 control mux A and D3–D0 control mux B - enabling simultaneous or independent channel selection.
It features asynchronous RESET that forces all switches OFF and clears the shift register, plus CS-synchronized latching on rising edge to update analog paths. The device supports daisy-chaining via DOUT-to-DIN cascading, with V+ referenced DOUT output level and TTL/CMOS-compatible digital inputs at ±5V or +5V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Configuration | Dual independent 4-to-1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B) |
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and gain error in precision sensor/ADC front-ends |
| On-Resistance Match | ≤16Ω between channels - critical for matched gain paths in differential or ratiometric measurement systems |
| Analog Signal Range | Rail-to-rail: (V− − 2V) to (V+ + 2V) - supports full-scale operation with ±5V, ±3V, or single +5V/+3V supplies |
| Off-Leakage Current | 0.1nA max at +25°C - preserves accuracy in high-impedance pH, thermocouple, or photodiode interfaces |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 3-wire (SCLK, DIN, DOUT) with CS-latched update - enables microcontroller integration without parallel bus overhead |
| Power Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - accommodates industrial, avionics, and battery-powered designs |
Pinout & Package
MAX350C/D is offered in 18-pin plastic DIP and SO packages (per Ordering Information). Pin functions are validated per Maxim's MAX350 functional diagram and Pin Description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low latch enable: rising edge updates switch states from shift register contents |
| RESET | Asynchronous Reset | Active-low: forces all switches OFF and clears internal shift register to zero |
| DOUT | Serial Data Output | Shift register Q8 output - enables daisy-chaining of multiple MAX350s with V+-referenced logic high |
| V− | Negative Analog Supply | Connect to GND for single-supply operation; required for bipolar signal handling |
| GND | Digital Ground Reference | Reference for digital I/O only; analog signals float between V+ and V− |
| DIN | Serial Data Input | MSB-first (D7 first) data input synchronized to SCLK rising edge |
| V+ | Positive Analog Supply | Supplies analog path and sets DOUT logic-high level; range +2.7V to +16V |
| SCLK | Serial Clock Input | Rising-edge clock for DIN data capture; hysteresis >100mV prevents noise-induced misreads |
| COMA, COMB | Mux Outputs / Common Terminals | Bidirectional analog nodes - either may serve as input or output depending on signal flow direction |
| NO0A–NO3A, NO0B–NO3B | Mux Inputs / Normally Open Terminals | Bidirectional analog nodes - conduct equally well in either direction when enabled |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-to-1 mux architecture | Enables simultaneous routing of two separate analog signal streams (e.g., dual ADC inputs or redundant sensor paths) |
| 100Ω max on-resistance with ≤16Ω matching | Minimizes channel-to-channel gain mismatch in multi-channel instrumentation amplifiers or calibration circuits |
| Rail-to-rail analog signal handling | Supports full dynamic range of ±10V sensors or +0–+5V industrial transducers without level-shifting circuitry |
| Asynchronous RESET with zero-power default | Guarantees known OFF state at power-up or fault recovery - eliminates undefined analog shorts during boot |
| >2kV ESD protection (HBM) | Withstands handling and board-level ESD events without latch-up or parameter shift - reduces system-level protection components |
Applications
| Industrial Process Monitoring | Avionics Sensor Multiplexing |
|---|---|
Use Scenario: Scanning 8 thermocouple or RTD inputs into a single high-resolution ADC in PLC or DCS systems. IC Role / Device Role / Timing Role: Dual 4-to-1 analog mux providing isolated, low-leakage signal routing with deterministic turn-on time (≤400ns). Use Value: Enables cost-effective channel expansion without adding ADCs; rail-to-rail support handles wide sensor voltage spans. | Use Scenario: Routing redundant air-data sensor outputs (pitot/static pressure, angle-of-attack) to flight control computers. IC Role / Device Role / Timing Role: Fault-tolerant analog switch array with asynchronous RESET for immediate isolation during sensor failure detection. Use Value: Eliminates mechanical relays; <0.1nA leakage prevents drift in high-impedance sensor bridges. |
| ATE Signal Path Switching | Audio Channel Routing |
Use Scenario: Configurable test head interface switching between DUT pins and precision source-measure units (SMUs). IC Role / Device Role / Timing Role: Low-on-resistance, matched-switch mux ensuring consistent stimulus/load conditions across test channels. Use Value: 16Ω RON match minimizes calibration drift; SPI interface allows fast reconfiguration between test sequences. | Use Scenario: Dynamic routing of line-level audio sources (mic preamp, DAC output, Bluetooth codec) to amplifier inputs in pro-audio mixers. IC Role / Device Role / Timing Role: Bidirectional analog switch supporting both input and output signal paths with <90dB off-isolation. Use Value: Prevents crosstalk between active channels; rail-to-rail operation preserves full audio dynamic range. |
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, single 3.3V/5V supply only; 4Ω RON; no daisy-chain DOUT | Higher channel count but lacks dual independent mux structure and asynchronous RESET | Choose ADG732BRUZ for high-density, low-RON single-supply systems where daisy-chaining isn't needed. |
| TMUX1308PWR | 8-channel, single 1.8–5.5V supply; 5.5Ω RON; I²C interface; no dual-mux partitioning | Lower voltage operation and I²C compatibility, but no COMA/COMB separation or RESET pin | Choose TMUX1308PWR for battery-powered, low-voltage microcontroller systems requiring I²C control. |
Compared with ADG732BRUZ and TMUX1308PWR, the MAX350C/D uniquely provides dual independent 4-to-1 muxes with asynchronous RESET, daisy-chain capability, and bipolar supply support - making it optimal for industrial and avionics applications requiring fault containment and flexible analog routing.
Availability
MAX350C/D is available at Aetrix Electronics and suitable for industrial process monitoring, avionics sensor interfacing, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance over 0°C to +70°C.
Supply support for MAX350C/D 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 markets.
The MAX350C/D belongs to Maxim's serially controlled analog switch/multiplexer product line, engineered for high-reliability signal routing in environments demanding low leakage, rail-to-rail operation, and robust digital control - especially where dual independent mux paths and fail-safe RESET are essential.
FAQ
What is the maximum allowable analog signal range for the MAX350C/D when operated from ±5V supplies?
The MAX350C/D supports rail-to-rail analog signals from (V− − 2V) to (V+ + 2V). With ±5V supplies, this yields a usable analog range of −7V to +7V. This extended range accommodates signal overshoot and ensures reliable conduction even with transient excursions beyond the supply rails - critical in industrial sensor interfaces where EMI-induced spikes occur.
Does the MAX350C/D support daisy-chaining, and how is it implemented?
Yes, the MAX350C/D supports daisy-chaining via its DOUT pin, which outputs the same data shifted in eight clocks earlier. To daisy-chain, connect DOUT of one MAX350C/D to DIN of the next, tie all CS pins together, and shift an N×8-bit stream. On the rising edge of CS, all devices simultaneously update their switch states - enabling synchronized configuration of multiple MAX350C/D units with a single microcontroller GPIO.
What happens to the switch states of the MAX350C/D during power-up?
At power-up, all switches of the MAX350C/D are guaranteed OFF and the internal shift register resets to zero. This behavior is ensured by internal power-on-reset circuitry and does not require external RESET assertion. It prevents unintended analog shorts or signal contention during system initialization - a key safety feature in medical and avionics applications.
Can the MAX350C/D operate from a single +5V supply, and what impact does this have on performance?
Yes, the MAX350C/D operates from a single +5V supply (V− tied to GND). In this mode, on-resistance increases to 175Ω max (vs. 100Ω at ±5V), and analog signal range becomes 0V to +5V. Off-isolation remains >90dB and leakage stays <0.1nA @ +25°C. This configuration is ideal for cost-sensitive, low-voltage embedded systems where bipolar signal handling is unnecessary.
How does the RESET pin function on the MAX350C/D, and is it necessary to use it in every design?
The RESET pin on the MAX350C/D is active-low and asynchronously forces all switches OFF and clears the internal shift register to zero - regardless of CS or clock state. While not mandatory (power-up default is safe), using RESET is recommended in safety-critical systems to guarantee known analog isolation after fault conditions, brownouts, or software crashes. It requires only a pull-up resistor and momentary active-low pulse.
MAX350C/D 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
MAX350C/D FAQ
1.How can I place an order for MAX350C/D through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350C/D 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 MAX350C/D reliable?
The price and inventory of MAX350C/D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350C/D is usually 5 days.
3.What payment methods are accepted for MAX350C/D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350C/D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350C/D?
MAX350C/D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350C/D 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 MAX350C/D?
For technical support, including MAX350C/D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350C/D requirements.
6.How does Aetrix verify that MAX350C/D is sourced from the original manufacturer or authorized distributors?
All MAX350C/D 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 MAX350C/D meets industry standards.
7.What is the process for return or replacement of MAX350C/D?
All MAX350C/D units undergo pre-shipment inspection (PSI). If there is an issue with MAX350C/D, 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 MAX350C/D part is unused and in its original packaging.
Return procedure for MAX350C/D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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