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Analog Devices Inc./Maxim Integrated MAX335ENG
- Part No.:
- MAX335ENG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX335ENG.pdf
- Description:
- IC SWITCH SPST-NOX8 150OHM 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,383
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Product details
Overview
The MAX335ENG from Maxim Integrated is an 8-channel serial-controlled SPST analog switch IC operating over ±4.5V to ±20V supplies, featuring 100Ω typical on-resistance, ±15V analog signal range, and SPI-compatible 3-wire interface - used for precision signal routing in avionics and industrial process control systems.
For engineers reviewing the MAX335ENG datasheet, MAX335ENG pinout, MAX335ENG application, or MAX335ENG equivalent, this page delivers verified electrical specs, daisy-chain timing behavior, rail-to-rail switching capability, thermal performance across -40°C to +85°C, and real-world multiplexer/SPDT reconfiguration guidance.
Technical Context
The MAX335ENG implements an 8-bit shift register with synchronous data latching on CS rising edge, supporting daisy-chained configurations via DOUT-to-DIN cascading. Its internal parallel register drives eight independent SPST switches with break-before-make delay of 15–25ns and <2pF off-capacitance per channel.
Switch control logic uses VL-referenced TTL-compatible inputs (VIH = 2.4V at VL = +5V), with reset triggered by VL falling below 0.8V. Digital feedthrough is limited to 100nV-sec, mitigated by 100mV SCLK hysteresis and internal filtering design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail signal switching without clipping across full supply range |
| On-Resistance (RON) | 100Ω typ - ensures minimal voltage drop and power loss in signal paths up to ±10V COM |
| Off-Leakage Current | ±0.002nA max - preserves high-impedance isolation in precision sensor or data-acquisition front-ends |
| Turn-On/Off Time | 200–500ns - enables fast channel switching for time-critical multiplexing in serial data acquisition |
| SCLK Max Frequency | 2.1MHz - allows >400kSPS serial update rate for 8-bit configuration in real-time control loops |
| Operating Temp Range | -40°C to +85°C - qualified for extended industrial and avionics environments without derating |
| Supply Voltage Range | ±4.5V to ±20V - accommodates dual-supply systems from ±5V instrumentation to ±15V legacy avionics rails |
Pinout & Package
The MAX335ENG is housed in a 24-pin narrow plastic DIP package (0.300" width), with through-hole mounting and industry-standard 0.1" pin pitch. Pin 1 is SCLK; pins 5–20 carry NOx/COMx switch terminals; V+, V-, GND, VL, CS, DIN, SCLK, and DOUT are dedicated control and power connections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCLK | Serial clock input | Edge-triggered input synchronizing DIN data into 8-bit shift register; 2.1MHz max frequency |
| 3 DIN | Serial data input | MSB-first 8-bit control word; each bit independently enables one SPST switch |
| 5–20 NO0–NO7 / COM0–COM7 | Analog switch terminals | Eight bidirectional SPST channels; NO/COM pairs conduct equally in either direction |
| 22 DOUT | Serial data output | Shift register output enabling daisy-chaining of multiple MAX335ENG devices |
| 23 VL | Logic supply/reset | +5V reference for TTL-compatible inputs; falling below 0.8V resets shift register and disables all switches |
| 24 CS | Chip select | Active-low latch control; rising edge updates switch states from shift register contents |
Key Features
| Feature | Design Value |
|---|---|
| 8 independently controllable SPST switches | Enables flexible signal routing, 8:1 multiplexing, or four SPDT configurations per device |
| SPI-compatible 3-wire serial interface | Reduces microcontroller GPIO count vs. parallel control; supports CPOL=0, CPHA=0 mode |
| Daisy-chain capability via DOUT | Allows synchronized configuration of multiple MAX335ENG units using single DIN/SCLK/CS lines |
| Rail-to-rail analog signal handling | Supports ±15V signals with constant RON and low charge injection (<70pC) across full range |
| Power-up reset and VL-based reset | Guarantees known off-state at startup; external reset pulse possible via VL pin |
Applications
| Avionics Signal Routing | Industrial Process Control |
|---|---|
Use Scenario: Selecting discrete sensor inputs (temperature, pressure, position) in flight control computers under EMI-heavy environments. IC Role / Device Role / Timing Role: Analog switch matrix routing conditioned signals to ADC inputs; configured via isolated SPI bus. Use Value: ±15V tolerance matches aircraft 28VDC-derived analog rails; 90dB off-isolation prevents cross-channel interference during rapid scanning. | Use Scenario: Multiplexing 8 thermocouple or RTD inputs into a single high-resolution sigma-delta ADC in PLC I/O modules. IC Role / Device Role / Timing Role: Precision SPST switch providing low-offset, low-leakage signal path selection before programmable gain amplifier stage. Use Value: 0.002nA max off-leakage avoids measurement drift; 100Ω RON ensures <0.1% gain error at 10kΩ source impedance. |
| Networking Equipment Test Interface | Medical Instrumentation Signal Conditioning |
Use Scenario: Reconfiguring test signal paths between PHY layers, loopback circuits, and diagnostic ports in Ethernet switch validation rigs. IC Role / Device Role / Timing Role: High-speed analog switch enabling automated test sequence execution without manual patching. Use Value: 200ns turn-on time supports >1MHz test pattern rates; daisy-chained configuration allows single-controller management of 32+ channels. | Use Scenario: Isolating ECG electrode inputs during lead-off detection or selecting differential amplifier configurations in portable monitors. IC Role / Device Role / Timing Role: Biopotential-grade analog switch ensuring patient safety and signal fidelity via galvanic isolation and low charge injection. Use Value: <70pC charge injection prevents baseline wander; -40°C to +85°C rating supports battery-powered field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX336ENG | 16-channel SPST, same package/temp grade, but requires parallel control (no serial interface) | Higher channel density without serial overhead; unsuitable where GPIO count or wiring simplicity is critical | Select MAX336ENG only when parallel address/data bus is available and daisy-chaining is unnecessary |
| ADG728BRUZ | 8-channel SPST, 3.3V/5V single-supply operation, 4Ω RON, SPI interface, but rated only to +85°C (not extended temp) | Better on-resistance and lower voltage operation, but lacks ±15V analog swing and MIL-grade temp range | Choose ADG728BRUZ for low-voltage, low-RON applications where dual-supply and extended temperature are not required |
Compared with MAX335ENG, MAX336ENG offers double channel count but eliminates serial configurability, while ADG728BRUZ improves RON and simplifies supply architecture at the cost of analog range and temperature robustness - making MAX335ENG uniquely suited for ruggedized dual-supply signal routing.
Availability
MAX335ENG is available at Aetrix Electronics and suitable for avionics signal routing, industrial process control, and networking equipment test interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX335ENG 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 demanding industrial, automotive, and communications applications.
The MAX335ENG belongs to Maxim's high-voltage serial-switch product line, engineered specifically for robust signal routing in dual-supply systems where SPI control, wide temperature operation, and rail-to-rail analog integrity are essential.
FAQ
What is the maximum analog signal voltage the MAX335ENG can handle?
The MAX335ENG supports analog signals from -15V to +15V relative to V-, verified across its full -40°C to +85°C operating range. This ±15V range is guaranteed under ±4.5V to ±20V supply conditions and enables direct interfacing with legacy industrial and avionics sensor outputs without level-shifting circuitry. The MAX335ENG maintains 100Ω typical on-resistance and <2pF off-capacitance across this entire signal span.
How does the MAX335ENG's serial interface differ from standard SPI?
The MAX335ENG implements a 3-wire SPI-compatible interface with CPOL = 0 and CPHA = 0, requiring CS active-low assertion to enable data shifting on SCLK rising edges. Unlike full SPI peripherals, it lacks MISO/MOSI separation - DOUT provides echo feedback only and is optional for single-device use. The MAX335ENG's latch updates exclusively on CS rising edge while SCLK is low, rejecting invalid transitions that could corrupt switch states.
Can multiple MAX335ENG devices be connected in series for expanded channel count?
Yes, the MAX335ENG supports daisy-chaining via its DOUT pin, which outputs the shifted-in data delayed by eight clocks. Connecting DOUT of one MAX335ENG to DIN of the next allows synchronous configuration of any number of devices using shared SCLK, CS, and DIN lines. When CS rises, all chained MAX335ENG units update their switch states simultaneously - critical for glitch-free multiplexer reconfiguration in real-time systems.
What happens to the MAX335ENG's switch states during power-up?
Upon power-up, the MAX335ENG's internal shift register initializes to all zeros, forcing all eight SPST switches to the OFF state regardless of supply ramp sequence. This power-on reset behavior is guaranteed by internal circuitry and requires no external RC network. Additionally, pulling VL below 0.8V at any time replicates this reset action, clearing the shift register and disabling all switches - a feature used for fail-safe shutdown in safety-critical applications using the MAX335ENG.
Is the MAX335ENG pin-compatible with other devices in the MAX335 family?
Yes, the MAX335ENG shares identical pinout and footprint with all 24-pin variants in the MAX335 family, including MAX335CNG, MAX335CWG, MAX335EUG, and MAX335EWG. Differences are limited to temperature grade (-40°C to +85°C for ENG), package type (narrow plastic DIP), and internal qualification - allowing direct substitution in existing layouts when upgrading from commercial-grade versions or migrating between SO/TSSOP/DIP form factors.
MAX335ENG 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:
- Through Hole
- Supplier Device Package:
- 24-PDIP
MAX335ENG FAQ
1.How can I place an order for MAX335ENG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX335ENG 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 MAX335ENG reliable?
The price and inventory of MAX335ENG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX335ENG is usually 5 days.
3.What payment methods are accepted for MAX335ENG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX335ENG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX335ENG?
MAX335ENG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX335ENG 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 MAX335ENG?
For technical support, including MAX335ENG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX335ENG requirements.
6.How does Aetrix verify that MAX335ENG is sourced from the original manufacturer or authorized distributors?
All MAX335ENG 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 MAX335ENG meets industry standards.
7.What is the process for return or replacement of MAX335ENG?
All MAX335ENG units undergo pre-shipment inspection (PSI). If there is an issue with MAX335ENG, 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 MAX335ENG part is unused and in its original packaging.
Return procedure for MAX335ENG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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