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Analog Devices Inc./Maxim Integrated MAX335CWG+T
- Part No.:
- MAX335CWG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX335CWG+T.pdf
- Description:
- IC SW SPST-NOX8 150OHM 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,952
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Product details
Overview
MAX335CWG+T from Maxim Integrated is an 8-channel serial-controlled SPST analog switch IC with SPI-compatible interface, ±4.5V to ±20V dual-supply operation, 100Ω typical on-resistance, rail-to-rail ±15V analog signal handling, and daisy-chainable DOUT output. It serves as a programmable signal routing device in high-voltage industrial data acquisition systems.
For engineers reviewing the MAX335CWG+T datasheet, MAX335CWG+T pinout, MAX335CWG+T application, or MAX335CWG+T equivalent, key selection criteria include its wide analog voltage range, guaranteed break-before-make timing (15–25ns), low 2pF off-capacitance per channel, and compatibility with Motorola SPI mode CPOL=0/CPHA=0 for deterministic switch control in noise-sensitive environments.
Technical Context
The MAX335CWG+T implements an 8-bit shift register synchronized to SCLK's rising edge, with CS-latched update on rising edge while SCLK is low-ensuring deterministic switch state transitions. Its internal parallel register drives eight independent CMOS transmission gates, each with matched bidirectional conduction and constant RON across the full ±15V analog range.
Digital feedthrough is limited to 100nV·sec via integrated 100mV SCLK hysteresis and optimized charge injection (<70pC at ±15V), enabling clean switching of precision DC and low-frequency AC signals without external filtering in most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail signal routing with no clipping in ±15V systems |
| On-Resistance (RON) | 100Ω typ - ensures minimal voltage drop and signal attenuation in precision measurement paths |
| Off-Leakage Current | ±0.002nA max - preserves high-impedance sensor node integrity over temperature |
| Switch Turn-On/Off Time | 200–500ns - enables fast multiplexing in real-time process control sampling |
| Break-Before-Make Delay | 15–25ns - prevents momentary short-circuit during channel switching in power-sensitive circuits |
| SCLK Max Frequency | 2.1MHz - allows full 8-bit configuration in under 4µs for high-throughput scanning |
| Off Isolation | 90dB at 100kHz - suppresses crosstalk between inactive channels in dense signal routing |
Pinout & Package
MAX335CWG+T uses a 24-pin Wide SO (Small Outline) package with 300-mil body width, 1.27mm pitch, and surface-mount footprint compliant with JEDEC MS-013AC. Pin 1 is SCLK; pins 5–20 are NO/COM switch terminals (NO0–NO7, COM0–COM7); pins 2, 21, 23, 4, 24, 1, 3, 22 are V+, V−, VL, GND, CS, SCLK, DIN, DOUT respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Serial clock input | Edge-triggered master clock for shift register; requires 100mV hysteresis for noise immunity |
| 2 V+ | Positive supply | Bias for high-side switch transistors; supports up to +20V for extended dynamic range |
| 3 DIN | Serial data input | MSB-first 8-bit control word; each bit directly enables one SPST switch |
| 4 GND | Ground reference | Common return for logic and analog sections; isolated from V− in split-supply configurations |
| 5–20 NO0–NO7 / COM0–COM7 | Analog switch terminals | Bidirectional SPST paths; NO and COM interchangeable; 2pF off-capacitance minimizes loading |
| 21 V− | Negative supply | Bias for low-side transistors; supports down to −20V for bipolar signal handling |
| 22 DOUT | Serial data output | Shift-register output delayed by 8 clocks; enables daisy-chaining of multiple MAX335CWG+T devices |
| 23 VL | Logic supply/reset | +5V TTL-level interface; pulsed below +0.8V resets shift register and forces all switches OFF |
| 24 CS | Chip select | Active-low latch enable; rising edge updates switch states only when SCLK is low |
Key Features
| Feature | Design Value |
|---|---|
| SPI-compatible serial interface | Motorola SPI mode CPOL=0/CPHA=0 ensures plug-and-play integration with standard microcontroller peripherals |
| Rail-to-rail ±15V analog operation | Enables direct connection to industrial sensors, transducers, and DAC outputs without level-shifting circuitry |
| Daisy-chainable DOUT | Allows stacking of multiple MAX335CWG+T units on single SPI bus, reducing GPIO count and PCB routing complexity |
| Guaranteed break-before-make | 15–25ns delay prevents transient shorts during channel switching-critical for protecting downstream amplifiers and ADC inputs |
| Low charge injection (≤70pC) | Maintains DC accuracy in sample-and-hold and precision multiplexer applications without post-switch settling delays |
Applications
| Industrial Data Acquisition | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing 8 thermocouple or strain gauge inputs into a single high-resolution ADC in a PLC module. IC Role / Device Role / Timing Role: Serial-configurable SPST switch array providing isolated analog path selection with <500ns switching and 90dB channel isolation. Use Value: Eliminates mechanical relays and discrete analog mux ICs, reducing size, power, and failure rate while supporting ±15V sensor outputs directly. | Use Scenario: Reconfigurable signal routing between flight control computers, inertial measurement units, and telemetry transmitters in UAV avionics bays. IC Role / Device Role / Timing Role: Radiation-tolerant (per MIL-STD-883 option) analog switch enabling hot-swappable I/O mapping via firmware-controlled SPI writes. Use Value: Enables in-flight reconfiguration of sensor data paths without hardware changes-meeting DO-178C software-defined system requirements. |
| Process Control Networking | High-Voltage Test Equipment |
Use Scenario: Dynamic assignment of analog I/O channels across distributed I/O nodes in a PROFIBUS DP network with centralized controller. IC Role / Device Role / Timing Role: SPI-addressable analog switch acting as programmable patch panel, updated synchronously across multiple nodes using daisy-chained DOUT. Use Value: Reduces wiring complexity and enables remote calibration sequences by electronically rerouting test signals to calibration references. | Use Scenario: Automated test fixture sequencing 8 high-voltage (±15V) stimulus signals to DUT inputs during functional testing of power management ICs. IC Role / Device Role / Timing Role: Precision SPST switch delivering sub-100pC charge injection and <25ns break-before-make to prevent DUT latch-up during voltage step transitions. Use Value: Guarantees safe, glitch-free switching of high-energy analog stimuli-replacing electromechanical relays with 10M-cycle solid-state reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1408BRUZ | 8-channel SPST, ±15V rating, but parallel 3-wire interface (not serial); 4.7Ω RON; no daisy-chain capability | Requires 8 GPIOs for control vs. 3 for MAX335CWG+T; better for low-RON but less scalable in dense routing | Choose ADG1408BRUZ when ultra-low on-resistance dominates over pin count and routing flexibility |
| TMUX1308PWR | 8-channel SPST, single +3.3V supply only; 5.5Ω RON; SPI interface with auto-increment addressing; no negative supply support | Limited to unipolar 0–3.3V signals; unsuitable for ±15V industrial or avionics use cases | Choose TMUX1308PWR only for low-voltage, cost-sensitive consumer-grade multiplexing where dual supply is unnecessary |
Compared with ADG1408BRUZ and TMUX1308PWR, the MAX335CWG+T uniquely combines wide ±20V supply tolerance, true bidirectional rail-to-rail analog switching, and daisy-chainable serial control-making it the only viable option for high-voltage, space-constrained, firmware-reconfigurable signal routing in industrial and aerospace systems.
Availability
MAX335CWG+T is available at Aetrix Electronics and suitable for industrial data acquisition, avionics signal routing, and high-voltage test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX335CWG+T 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 high-reliability semiconductor solutions for industrial, automotive, and communications markets.
The MAX335CWG+T belongs to Maxim's high-voltage serial-switch product line, engineered specifically for robust, firmware-controlled analog signal routing in harsh environments where ±15V signal integrity and deterministic timing are non-negotiable.
FAQ
What is the absolute maximum analog signal voltage range supported by the MAX335CWG+T?
The MAX335CWG+T supports an absolute maximum analog signal range of ±20V referenced to V−, with guaranteed operation from ±4.5V to ±20V dual supplies. Its specified rail-to-rail analog signal handling is ±15V (VANALOG = −15V to +15V), meaning it reliably passes full-scale signals across that range without distortion or clipping when powered within rated supply limits. This makes the MAX335CWG+T suitable for interfacing directly with industrial sensors and actuators operating at ±12V or ±15V levels.
Does the MAX335CWG+T require external pull-up resistors on its digital interface lines?
No, the MAX335CWG+T does not require external pull-up resistors on DIN, SCLK, CS, or DOUT. Its digital inputs (DIN, SCLK, CS) have TTL-compatible thresholds referenced to VL, with VIH = 2.4V (at VL = +5V) and VIL = 0.8V, and input leakage current ≤ ±0.03µA-enabling direct connection to standard microcontroller GPIOs. DOUT is a buffered CMOS output capable of driving 0.8mA high or 1.6mA low, sufficient to drive the next device's DIN in a daisy chain without external termination.
How does the VL pin function beyond powering the logic interface in the MAX335CWG+T?
In addition to supplying the logic interface, the VL pin on the MAX335CWG+T provides a reset function: pulsing VL below +0.8V forces all internal switches OFF and clears the 8-bit shift register to zero. This hardware reset is independent of CS or SCLK activity and ensures deterministic power-up or fault-recovery behavior. When VL is tied to V+, the reset function is disabled-so proper VL decoupling and controlled ramp-up are essential in systems requiring guaranteed initial OFF state.
Can multiple MAX335CWG+T devices share the same SCLK and DIN lines while maintaining independent control?
Yes-multiple MAX335CWG+T devices can share SCLK and DIN while maintaining independent control using addressable serial interface topology. Each device's CS pin is driven by separate decoded logic (e.g., 3-to-8 decoder), allowing individual selection. When CS is low for a specific device, it accepts data on DIN/SCLK; other devices ignore the clock and data. DOUT is unused in this configuration. This method avoids daisy-chain latency and enables random-access switching across up to eight devices using only three shared signal lines plus N dedicated CS lines.
What is the guaranteed break-before-make timing specification for the MAX335CWG+T, and why is it critical?
The MAX335CWG+T guarantees a break-before-make delay of 15ns minimum to 25ns maximum between adjacent switch closures. This parameter ensures that one switch fully opens before another closes-preventing momentary shorts between analog signal paths. In applications like multiplexing sensor inputs to a shared amplifier or ADC, violating this timing could cause destructive current surges, signal corruption, or latch-up. The guaranteed spec eliminates need for external timing verification or guard-band firmware delays, simplifying design validation for safety-critical systems.
MAX335CWG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 8
- On-State Resistance (Max):
- 150Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 400ns, 400ns
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -100dB @ 100kHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
MAX335CWG+T FAQ
1.How can I place an order for MAX335CWG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX335CWG+T 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 MAX335CWG+T reliable?
The price and inventory of MAX335CWG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX335CWG+T is usually 5 days.
3.What payment methods are accepted for MAX335CWG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX335CWG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX335CWG+T?
MAX335CWG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX335CWG+T 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 MAX335CWG+T?
For technical support, including MAX335CWG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX335CWG+T requirements.
6.How does Aetrix verify that MAX335CWG+T is sourced from the original manufacturer or authorized distributors?
All MAX335CWG+T 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 MAX335CWG+T meets industry standards.
7.What is the process for return or replacement of MAX335CWG+T?
All MAX335CWG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX335CWG+T, 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 MAX335CWG+T part is unused and in its original packaging.
Return procedure for MAX335CWG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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