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Analog Devices Inc./Maxim Integrated MAX335EWG
- Part No.:
- MAX335EWG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX335EWG.pdf
- Description:
- IC SW SPST-NOX8 150OHM 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,592
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Product details
Overview
The MAX335EWG from Maxim Integrated is a serial-controlled, 8-channel SPST analog switch IC operating over ±4.5V to ±20V supplies, featuring 100Ω on-resistance, ±15V analog signal range, and SPI-compatible three-wire interface. It enables precise signal routing in avionics and industrial process control systems where rail-to-rail switching and daisy-chain expandability are required.
For engineers reviewing the MAX335EWG datasheet, MAX335EWG pinout, MAX335EWG application, or MAX335EWG equivalent, key selection criteria include its -40°C to +85°C extended temperature rating, 24-pin wide SO package, 200ns typical turn-on time, and guaranteed break-before-make delay of 15–25ns for glitch-free channel sequencing.
Technical Context
The MAX335EWG implements an 8-bit shift register synchronized to SCLK's rising edge, with CS-controlled latching that updates all eight SPST switches simultaneously. Its internal logic translator supports VL = +4.5V to V+ and enables TTL-level compatibility when VL = +5V.
Switch control is bit-mapped: D7–D0 directly enable/disable NO7–NO0 relative to their COMx terminals, with no inter-channel coupling-crosstalk is -100dB at 100kHz. Digital feedthrough is limited to 100nV-sec via integrated SCLK hysteresis (100mV typ), supporting clean analog switching even with fast digital edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail signal routing across full supply range without clipping |
| On-Resistance | 100Ω (typ) at ±10V - ensures minimal insertion loss and voltage drop in precision signal paths |
| Turn-On/Off Time | 200ns / 90ns (typ) - enables high-speed multiplexing in data acquisition systems |
| SCLK Max Frequency | 2.1MHz - allows >400kSPS serial configuration update rate for dynamic reconfiguration |
| Off Isolation | 90dB at 100kHz - prevents crosstalk between inactive channels in sensitive measurement circuits |
| Channel Crosstalk | -100dB at 100kHz - maintains signal integrity in multi-channel differential applications |
| Break-Before-Make Delay | 15–25ns - guarantees no short-circuit transients during channel switching |
Pinout & Package
The MAX335EWG is housed in a 24-pin wide SO (Small Outline) package with standard 0.300" body width and 1.27mm pitch, optimized for industrial PCB layouts requiring thermal and mechanical robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Serial clock input | Synchronizes DIN data into 8-bit shift register on rising edge; supports up to 2.1MHz operation |
| 3 DIN | Serial data input | Accepts 8-bit control word; D7 controls NO7, D0 controls NO0 |
| 22 DOUT | Serial data output | Shift register output delayed by 8 clocks; enables daisy-chaining multiple MAX335EWG devices |
| 24 CS | Chip select | Latch enable: rising edge updates all 8 switches simultaneously after full 8-bit load |
| 5–20 NO0–NO7 / COM0–COM7 | Analog switch terminals | Eight independent SPST switches; bidirectional conduction with matched on-resistance |
| 2 V+, 21 V- | Analog power supplies | Support ±4.5V to ±20V operation; define analog signal swing limits |
| 23 VL | Logic supply/reset | Sets input thresholds; pulsed below 0.8V resets shift register and forces all switches OFF |
Key Features
| Feature | Design Value |
|---|---|
| SPI-compatible serial interface | Three-wire (SCLK/DIN/CS) operation compatible with Motorola SPI mode CPOL=0, enabling direct connection to microcontroller SPI peripherals |
| Daisy-chain capability | DOUT output allows cascading of unlimited MAX335EWG units using single SCLK/DIN/CS bus-reduces GPIO count and simplifies firmware |
| Rail-to-rail analog switching | ±15V signal handling with 100Ω RON ensures low distortion and flat frequency response across full input range |
| Guaranteed break-before-make | 15–25ns delay prevents momentary shorting during channel transitions-critical for fault-tolerant avionics and test equipment |
| Extended temperature operation | -40°C to +85°C rating validated per MAX335EWG ordering code-supports deployment in harsh industrial and aerospace environments |
Applications
| Avionics Signal Routing | Industrial Process Control |
|---|---|
Use Scenario: Multiplexing sensor inputs (e.g., pressure, temperature, inertial) to a central ADC in flight control systems. IC Role / Device Role / Timing Role: SPST switch array controlled via isolated SPI bus; sequenced under real-time OS scheduler. Use Value: Eliminates mechanical relays; 90dB off-isolation prevents cross-channel interference in safety-critical measurements. | Use Scenario: Dynamic reconfiguration of analog I/O modules in PLC backplanes handling 4–20mA loops and thermocouple inputs. IC Role / Device Role / Timing Role: Serial-configured analog switch matrix enabling hot-swappable module detection and signal path validation. Use Value: 200ns turn-on time supports <1ms diagnostic cycle times; ±20V supply tolerance accommodates field wiring transients. |
| Test Equipment Multiplexing | Medical Instrumentation |
Use Scenario: High-density signal routing in automated test equipment (ATE) switching matrices for semiconductor device characterization. IC Role / Device Role / Timing Role: 8× SPST element in modular switching card; daisy-chained with 7 other MAX335EWG for 64-channel control. Use Value: -100dB crosstalk preserves signal fidelity during nanovolt-level measurements; 2pF off-capacitance minimizes settling time. | Use Scenario: Patient-connected analog front-end in portable ECG monitors requiring galvanic isolation and low-leakage switching. IC Role / Device Role / Timing Role: Low-noise analog switch selecting between lead configurations (I, II, III, aVR, aVL, aVF) under microcontroller command. Use Value: 0.002nA max off-leakage current ensures patient safety compliance; 100Ω RON maintains gain accuracy in instrumentation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX336EWG | 16-channel SPST, same package and interface, but higher 125Ω RON and 350ns tON | Better channel density for space-constrained designs; trade-off is slower switching and higher on-loss | Select MAX336EWG only when 16 channels are needed and 125Ω RON is acceptable in signal path |
| ADG728BRUZ | 8-channel, parallel CMOS control (no serial interface), 4.5Ω RON, 3V–5.5V single supply only | Lower on-resistance ideal for precision DC-coupled paths, but lacks daisy-chain capability and bipolar supply support | Choose ADG728BRUZ for low-RON, low-voltage, non-daisy-chain applications where SPI interface is unnecessary |
Compared with MAX335EWG, MAX336EWG offers double channel count at the cost of speed and on-resistance, while ADG728BRUZ delivers ultra-low RON but abandons serial control and bipolar operation-making MAX335EWG the optimal balance for scalable, rugged, rail-to-rail serial switching.
Availability
The MAX335EWG is available at Aetrix Electronics and suitable for avionics signal routing, industrial process control, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX335EWG 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX335EWG belongs to Maxim's serial-controlled analog switch product line, engineered specifically for systems needing remote, low-pin-count, daisy-chainable switching of bipolar analog signals in harsh environments.
FAQ
What is the maximum supply voltage range supported by the MAX335EWG?
The MAX335EWG operates with analog supply voltages from ±4.5V to ±20V, enabling rail-to-rail analog signal handling up to ±15V. Its VL logic supply accepts +4.5V to V+, allowing flexible interfacing with 3.3V or 5V controllers. This wide range makes MAX335EWG suitable for industrial and avionics applications where supply rails vary significantly.
How does the MAX335EWG handle reset functionality?
The MAX335EWG implements hardware reset via the VL pin: pulsing VL below +0.8V forces all eight switches OFF and clears the internal 8-bit shift register to zero. This function is independent of CS or SCLK activity and provides deterministic power-up or fault-recovery behavior. The MAX335EWG datasheet specifies this as a guaranteed feature-not just a typical condition.
Can multiple MAX335EWG devices be connected in series for expanded channel count?
Yes, the MAX335EWG supports true daisy-chaining via its DOUT pin, which outputs the shifted-in data after an 8-clock delay. By connecting DOUT of one MAX335EWG to DIN of the next-and tying all CS and SCLK lines together-a single SPI bus can configure dozens of switches. This architecture is explicitly verified in the MAX335EWG timing diagrams and application circuits.
What is the guaranteed break-before-make timing for the MAX335EWG?
The MAX335EWG guarantees a break-before-make delay of 15ns to 25ns, measured from the turn-off edge of one switch to the turn-on edge of the next during sequential channel updates. This parameter is production-tested and specified in the Electrical Characteristics table-not derived or estimated-ensuring glitch-free switching critical in medical and avionics signal paths.
Does the MAX335EWG support SPI Mode 0 (CPOL=0, CPHA=0)?
Yes, the MAX335EWG is explicitly designed for SPI Mode 0: data is sampled on the rising edge of SCLK, and CS must be held low during the entire 8-bit shift sequence. The datasheet confirms CPOL=0 compatibility and warns against CPOL=1/CPHA=1 configurations, which fail to update the output latch correctly. This makes MAX335EWG interoperable with most ARM and PIC microcontrollers' default SPI settings.
MAX335EWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
MAX335EWG FAQ
1.How can I place an order for MAX335EWG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX335EWG 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 MAX335EWG reliable?
The price and inventory of MAX335EWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX335EWG is usually 5 days.
3.What payment methods are accepted for MAX335EWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX335EWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX335EWG?
MAX335EWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX335EWG 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 MAX335EWG?
For technical support, including MAX335EWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX335EWG requirements.
6.How does Aetrix verify that MAX335EWG is sourced from the original manufacturer or authorized distributors?
All MAX335EWG 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 MAX335EWG meets industry standards.
7.What is the process for return or replacement of MAX335EWG?
All MAX335EWG units undergo pre-shipment inspection (PSI). If there is an issue with MAX335EWG, 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 MAX335EWG part is unused and in its original packaging.
Return procedure for MAX335EWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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