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Analog Devices Inc./Maxim Integrated MAX337EWI+T
- Part No.:
- MAX337EWI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX337EWI+T.pdf
- Description:
- IC MUX DUAL 8:1 400OHM 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,485
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Product details
Overview
MAX337EWI+T from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed to route one of eight differential inputs (NO1A–NO8A and NO1B–NO8B) to two independent bidirectional outputs (COMA and COMB), controlled by a 3-bit binary address (A0–A2) and enable input (EN). It features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, 3.5pC typical charge injection, ±4.5V to ±20V dual-supply or +4.5V to +30V single-supply operation, and rail-to-rail signal handling - ideal for precision data acquisition in automated test equipment.
For engineers reviewing the MAX337EWI+T datasheet, MAX337EWI+T pinout, MAX337EWI+T application, or MAX337EWI+T equivalent, key selection criteria include guaranteed low leakage across temperature, TTL/CMOS-compatible control logic, ESD protection >2000V (Method 3015.7), break-before-make timing (10–50ns), and compatibility with DG506/DG507 replacement requirements in high-accuracy signal routing systems.
Technical Context
The MAX337EWI+T implements a dual 8:1 analog multiplexing architecture using BiCMOS process technology, supporting fully bidirectional, rail-to-rail signal paths with matched on-resistance (≤10Ω between channels). Its address decoder accepts A0–A2 inputs and enables channel selection only when EN is high, with all digital inputs TTL/CMOS-compatible over full supply and temperature ranges.
It operates from ±4.5V to ±20V dual supplies or +4.5V to +30V single supply (V− tied to GND), delivering stable switching performance with <500ns transition time and <750ns enable turn-on/off times across −40°C to +85°C. Charge injection (3.5pC typ) and off-isolation (−82dB) are specified and tested to ensure minimal signal corruption in precision sampling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8-channel (independent A/B banks), each with 3-bit address decoding and shared enable |
| On-Resistance (max) | 400Ω at TA = +25°C, VCOM = ±10V - ensures minimal voltage drop and gain error in sensor/DAQ signal paths |
| NO-Off Leakage (max) | 0.02nA at +25°C - preserves accuracy in high-impedance measurement circuits (e.g., pH sensors, strain gauges) |
| Charge Injection (typ) | 3.5pC - limits settling error and droop in sample-and-hold and ADC front-end designs |
| Supply Range | +4.5V to +30V single supply or ±4.5V to ±20V dual supply - supports industrial ±15V and battery-powered +5V/+12V systems |
| ESD Protection | >2000V per Method 3015.7 - enhances robustness during board handling and system integration |
| Transition Time (max) | 500ns - enables reliable multiplexing at up to ~1MHz channel-switching rates in dynamic test systems |
Pinout & Package
MAX337EWI+T is housed in a 28-pin Wide SO (W28+6) package, RoHS-compliant and lead-free (+T suffix), with 1.27mm pitch, 17.9mm × 7.5mm body size, and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply voltage input | Accepts +4.5V to +30V; powers internal logic and switch driver circuitry |
| V− | Negative supply voltage input | Accepts −4.5V to −20V; tied to GND for single-supply operation |
| GND | Logic ground reference | Reference for TTL/CMOS inputs; must be low-impedance to minimize noise coupling |
| EN | Active-high enable input | Disables all switches when low; required high for any channel conduction |
| A0, A1, A2 | 3-bit binary address inputs | Selects one of eight channels per bank (A or B); TTL/CMOS-compatible (0.8V/2.4V thresholds) |
| COMA, COMB | Bidirectional analog outputs | Common connection points for respective 8-channel banks; support rail-to-rail signal swing |
| NO1A–NO8A, NO1B–NO8B | Bidirectional analog inputs/outputs | 16 total analog terminals; electrically identical and interchangeable with COMA/COMB |
| N.C. | No internal connection | Pins 2, 3, 13 (MAX337) - must remain unconnected; no pull-up/down or routing required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - essential for full-scale sensor output utilization |
| Guaranteed low charge injection (3.5pC typ) | Minimizes voltage glitch on hold capacitors, reducing calibration overhead in precision ADC interfaces |
| Matched on-resistance (≤10Ω) | Ensures consistent gain and offset across channels - critical for multi-sensor scanning systems |
| Plug-in upgrade for DG506/DG507 | Pin-compatible replacement with improved leakage, ESD, and charge injection - simplifies legacy design refresh |
| Break-before-make switching (10–50ns) | Prevents momentary shorting between channels - avoids signal crosstalk and power rail disturbance |
Applications
| Automated Test Equipment (ATE) | Precision Data Acquisition Systems |
|---|---|
Use Scenario: Multiplexing multiple DUT sensor outputs (thermocouples, RTDs) into a shared high-resolution ADC. IC Role / Device Role / Timing Role: Dual-bank analog switch enabling synchronized sampling of differential sensor pairs while maintaining isolation between banks. Use Value: Low 20pA off-leakage prevents loading of high-Z sensor sources; 400Ω RON ensures <0.01% gain error at 10kΩ source impedance. |
Use Scenario: Channel-scanning in portable environmental monitors measuring CO₂, humidity, and VOCs via electrochemical and NDIR sensors. IC Role / Device Role / Timing Role: Low-charge-injection analog mux selecting sensor outputs to a low-noise instrumentation amplifier and SAR ADC. Use Value: 3.5pC charge injection limits hold-step error to <1LSB in 18-bit systems; rail-to-rail support accommodates ±10V sensor spans. |
| Medical Instrumentation | Industrial Process Control |
Use Scenario: Routing EEG/ECG electrode signals through programmable gain stages before digitization in patient monitoring units. IC Role / Device Role / Timing Role: High-isolation (−82dB off-isolation), low-leakage switch isolating biopotential inputs from shared analog front-end. Use Value: Sub-pA leakage preserves microvolt-level signal integrity; >2000V ESD rating protects against clinical environment discharge events. |
Use Scenario: Consolidating analog inputs from multiple 4–20mA transmitters (pressure, flow, level) into a PLC analog input module. IC Role / Device Role / Timing Role: Robust, wide-supply analog multiplexer interfacing field transmitters to isolated ADCs under harsh industrial conditions. Use Value: ±20V dual-supply operation tolerates common-mode transients; 500ns transition time supports >1kHz scan rates in closed-loop control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX337CWI+ | Same functionality and pinout, but rated for 0°C to +70°C (vs. −40°C to +85°C for MAX337EWI+T) | Suitable for commercial-grade instruments; not qualified for extended industrial or automotive ambient ranges | Select MAX337CWI+ only if operating temperature stays within 0°C–70°C and cost sensitivity outweighs thermal margin needs. |
| ADG507AKRZ | Pin-compatible dual 8:1 mux, but higher 600Ω max RON, 25pA max off-leakage, and no guaranteed charge injection spec | Better suited for general-purpose routing where ultra-low leakage or precision sampling is non-critical | Choose ADG507AKRZ when lower cost is prioritized over sub-20pA leakage and 3.5pC charge injection guarantees. |
Compared with MAX337CWI+, MAX337EWI+T provides extended temperature reliability for industrial deployments; versus ADG507AKRZ, it delivers superior leakage control and verified charge injection - making it the preferred choice for metrology-grade data acquisition where signal fidelity is non-negotiable.
Availability
MAX337EWI+T is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, and medical instrumentation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX337EWI+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX336/MAX337 family was engineered for low-leakage, low-charge-injection analog signal routing in precision measurement systems - targeting applications where signal integrity, temperature stability, and replacement compatibility with legacy DG-series muxes are critical.
FAQ
What is the maximum operating temperature range for MAX337EWI+T?
The MAX337EWI+T is rated for operation from −40°C to +85°C, validated across its full electrical specifications including on-resistance, leakage current, and switching timing. This extended industrial temperature range makes it suitable for deployment in factory-floor automation, outdoor instrumentation, and vehicle-mounted test systems where ambient conditions exceed commercial-grade limits.
Does MAX337EWI+T support single-supply operation?
Yes, MAX337EWI+T supports single-supply operation from +4.5V to +30V. In this configuration, the V− pin must be connected to GND. The device maintains rail-to-rail analog signal handling (0V to V+), TTL/CMOS-compatible logic thresholds, and full specification compliance - enabling simplified power design in battery-powered or +12V/+24V industrial systems.
Is MAX337EWI+T pin-compatible with the DG507?
Yes, MAX337EWI+T is explicitly designed as a plug-in upgrade for the industry-standard DG507. Pin assignments, functional block diagram, and truth table match identically - allowing direct PCB replacement without layout changes. Key improvements include lower leakage (<20pA vs. ~100pA), reduced charge injection (3.5pC vs. ~15pC), and enhanced ESD protection (>2000V vs. unspecified).
What is the significance of the 'W' and '+T' in MAX337EWI+T?
The 'W' denotes the 28-pin Wide SO package (W28+6 outline), while '+T' indicates tape-and-reel packaging with lead(Pb)-free, RoHS-compliant construction. This format supports automated SMT assembly and meets global environmental compliance requirements without compromising thermal or electrical performance relative to tray-packaged variants.
Can MAX337EWI+T be used in differential signal routing applications?
Yes, MAX337EWI+T is inherently suited for differential routing: its dual 8-channel architecture provides two independent banks (A and B), each with dedicated COM and NO pins. By assigning complementary signals (e.g., IN+ and IN−) to corresponding NOxA/NOxB channels and routing them to COMA/COMB, designers achieve matched-path switching with ≤10Ω RON matching - preserving common-mode rejection in precision instrumentation.
MAX337EWI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 400Ohm
- Channel-to-Channel Matching (ΔRon):
- 5Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 20V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 500ns, 500ns
- -3db Bandwidth:
- -
- Charge Injection:
- 3.5pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 20pA
- Crosstalk:
- -86dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
MAX337EWI+T FAQ
1.How can I place an order for MAX337EWI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX337EWI+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 MAX337EWI+T reliable?
The price and inventory of MAX337EWI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX337EWI+T is usually 5 days.
3.What payment methods are accepted for MAX337EWI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX337EWI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX337EWI+T?
MAX337EWI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX337EWI+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 MAX337EWI+T?
For technical support, including MAX337EWI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX337EWI+T requirements.
6.How does Aetrix verify that MAX337EWI+T is sourced from the original manufacturer or authorized distributors?
All MAX337EWI+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 MAX337EWI+T meets industry standards.
7.What is the process for return or replacement of MAX337EWI+T?
All MAX337EWI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX337EWI+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 MAX337EWI+T part is unused and in its original packaging.
Return procedure for MAX337EWI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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