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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:4,060
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Product details
Overview
The MAX335EWG+ from Maxim Integrated is a serial-controlled, 8-channel SPST analog switch IC designed for high-voltage signal routing in industrial and avionics systems. It features ±4.5V to ±20V dual-supply operation, 100Ω typical on-resistance, rail-to-rail ±15V analog signal handling, and SPI-compatible three-wire serial interface with daisy-chain capability. It operates across –40°C to +85°C and uses a 24-pin wide SO package.
For engineers reviewing the MAX335EWG+ datasheet, MAX335EWG+ pinout, MAX335EWG+ application, or MAX335EWG+ equivalent, this device is selected for precision analog multiplexing, serial data acquisition, differential switching, and reset-controlled channel isolation where high-voltage tolerance and deterministic timing are critical.
Technical Context
The MAX335EWG+ implements an 8-bit shift register synchronized to SCLK's rising edge, with CS-controlled latching on its rising edge while SCLK is low-ensuring deterministic update timing. Its internal parallel register drives eight independent CMOS SPST switches, each bidirectional and symmetric with constant RON over full analog range.
Digital I/O thresholds scale with VL (4.5V to V+), supporting TTL-level compatibility at VL = +5V (VIH = 2.4V, VIL = 0.8V). The DOUT output enables cascaded configuration, and VL < 0.8V triggers hardware reset-clearing the shift register and forcing all switches OFF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail signal routing without clipping in ±15V systems |
| On-Resistance (RON) | 100Ω typ - ensures minimal voltage drop and signal distortion in precision analog paths |
| Switch Turn-On/Off Time | 200ns / 90ns typ - enables fast channel selection for real-time data acquisition |
| Off-Leakage Current | ±0.002nA typ - preserves signal integrity in high-impedance sensor or reference circuits |
| SCLK Max Frequency | 2.1MHz - allows up to 262.5k switch updates/sec with 8-bit serial load |
| Power Supply Range | ±4.5V to ±20V - accommodates legacy industrial and avionics power rails |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial and commercial environments |
Pinout & Package
MAX335EWG+ uses a 24-pin Wide SO (Small Outline) package with 300-mil body width, gull-wing leads, and standard JEDEC MO-026AC footprint. Pin 1 is SCLK; pin 24 is CS; pins 5–20 carry NOx/COMx terminals (x = 0–7); V+, V−, GND, VL, DIN, SCLK, DOUT, and CS complete the interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Serial clock input | Rising-edge synchronous shift register clock; 2.1MHz max; 100mV hysteresis reduces noise sensitivity |
| 2 V+ | Positive analog supply | Accepts +4.5V to +20V; powers analog switch core and level translators |
| 3 DIN | Serial data input | MSB-first 8-bit control word; each bit independently enables one SPST switch |
| 4 GND | Ground reference | Common return for digital logic and analog substrate; tied to V− in single-supply mode |
| 5–20 NO0–NO7 / COM0–COM7 | Analog switch terminals | Eight independent SPST channels; bidirectional, symmetric conduction; no polarity constraints |
| 21 V− | Negative analog supply | Accepts –4.5V to –20V; defines lower analog rail and switch threshold reference |
| 22 DOUT | Serial data output | Shift register Q8 output; enables daisy-chaining of multiple MAX335EWG+ devices |
| 23 VL | Logic supply/reset | +5V nominal; sets TTL-compatible input thresholds; <0.8V forces hardware reset |
| 24 CS | Chip select | Active-low latch enable; rising edge (with SCLK low) commits shift register to analog switches |
Key Features
| Feature | Design Value |
|---|---|
| 8 independently controlled SPST switches | Enables flexible reconfigurable signal routing without external decoding logic |
| SPI-compatible 3-wire serial interface | Reduces microcontroller GPIO count; eliminates parallel bus wiring and address decoding |
| Daisy-chain capability via DOUT | Supports synchronized multi-device control with single SCLK/CS/DIN lines |
| Hardware reset via VL pin | Guarantees known OFF state at power-up or fault recovery without software intervention |
| ±15V analog signal handling | Eliminates external level-shifting for industrial sensor, actuator, and test equipment interfaces |
Applications
| Industrial Data Acquisition | Avionics Signal Routing |
|---|---|
|
Use Scenario: Multiplexing 8 thermocouple or strain gauge inputs into a single ADC channel in a programmable logic controller. IC Role / Device Role / Timing Role: Serial-configured SPST switch array providing channel isolation and rail-to-rail analog path selection under microcontroller control. Use Value: Enables compact, low-noise analog front-end design with deterministic 200ns channel switching and <0.002nA off-leakage to preserve measurement accuracy. |
Use Scenario: Routing discrete flight-control signals (e.g., flap position, rudder command) between redundant sensor buses and flight computers. IC Role / Device Role / Timing Role: High-reliability analog switch with hardware reset and ±20V tolerance, ensuring fail-safe OFF state during power transients. Use Value: Delivers guaranteed channel isolation (>90dB off-isolation), break-before-make timing (15ns), and -40°C to +85°C operation required for certified avionics subsystems. |
| Test Equipment Multiplexing | Differential Multiplexer Systems |
|
Use Scenario: Building an 8×1 analog multiplexer in automated test equipment to route DUT signals to shared oscilloscope or spectrum analyzer inputs. IC Role / Device Role / Timing Role: Digitally addressed analog switch with daisy-chain support, enabling scalable channel expansion across multiple PCBs. Use Value: Provides consistent 100Ω RON and <2pF off-capacitance across all channels-minimizing frequency-dependent insertion loss and crosstalk (<100dB). |
Use Scenario: Constructing a 4:2 differential multiplexer for balanced audio or instrumentation amplifier inputs using paired NO/COM terminals. IC Role / Device Role / Timing Role: Configurable SPST array supporting differential pair formation (e.g., NO0/NO4 → COM0/COM4) with simultaneous update via CS. Use Value: Achieves matched channel timing (tON/tOFF tracking within 10ns) and identical RON for common-mode rejection in precision differential measurements. |
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; higher channel count but 120Ω RON, 250ns tON | Better suited for dense multiplexing; less ideal where lowest on-resistance or fastest switching is critical | Select MAX336EWG+ only when 16 channels are needed and 20% higher RON is acceptable. |
| ADG1408BRUZ | 8-channel SPST, ±15V rating, but parallel 3-wire interface (no daisy-chain), 4.5Ω RON, –40°C to +125°C | Superior RON and temperature range, but requires more GPIOs and lacks serial scalability | Choose ADG1408BRUZ for ultra-low distortion in precision instrumentation where layout space permits parallel control. |
Compared with MAX335EWG+, MAX336EWG+ offers double the channel density at the cost of higher on-resistance and slower switching, while ADG1408BRUZ delivers significantly lower RON and wider temperature range but sacrifices serial scalability and increases board routing complexity.
Availability
MAX335EWG+ is available at Aetrix Electronics and suitable for industrial data acquisition, avionics signal routing, and test equipment multiplexing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
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 industrial, communications, and automotive markets, with emphasis on robustness and integration.
The MAX335EWG+ belongs to Maxim's serial-controlled analog switch product line, engineered for high-voltage signal routing in space-constrained, noise-sensitive systems where deterministic digital control and analog fidelity are jointly essential.
FAQ
What is the absolute maximum supply voltage rating for MAX335EWG+?
The MAX335EWG+ supports V+/V− supplies from ±4.5V to ±20V. Exceeding ±20V violates Absolute Maximum Ratings and may cause permanent damage. Operation at ±15V is typical for analog signal routing, and the device tolerates transient overvoltage up to ±22V per the datasheet's stress limits.
Does MAX335EWG+ support true SPI mode with CPOL=1 and CPHA=1?
No. The MAX335EWG+ requires CPOL=0 (SCLK idle low) and does not correctly update its latch under CPOL=1/CPHA=1 configurations. The datasheet explicitly states that only CPOL=0 operation ensures reliable switch state updates on the rising edge of CS when SCLK is low.
How does the VL pin function beyond powering logic inputs?
The VL pin serves dual roles: it sets input logic thresholds (VIH/VIL) and acts as a hardware reset. When VL drops below 0.8V, the internal shift register clears to zero and all eight switches force OFF-providing a deterministic power-up or fault-recovery state independent of software.
Can MAX335EWG+ be used in single-supply configurations?
Yes. The MAX335EWG+ operates with V− tied to GND and V+ = +10V to +30V, provided VL is referenced accordingly. In this mode, VL must equal V+ to maintain proper level translation; however, VL then loses its reset functionality since it cannot be pulsed below 0.8V relative to V−.
What is the purpose of the DOUT pin if only one MAX335EWG+ is used?
Even with a single MAX335EWG+, DOUT provides data echo for verification-allowing the host controller to read back the last shifted byte. This supports error detection in noisy environments and simplifies firmware validation without requiring additional monitoring circuitry.
MAX335EWG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- 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:
- -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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