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Analog Devices Inc./Maxim Integrated MAX328CWE+T
- Part No.:
- MAX328CWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX328CWE+T.pdf
- Description:
- IC MUX 8:1 3.5KOHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,149
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Product details
Overview
The MAX328CWE+T from Maxim Integrated is a monolithic CMOS 1-of-8 single-ended analog multiplexer with ultra-low off-leakage (1pA typ at +25°C), 2.5kΩ on-resistance, and ±5V to ±18V dual-supply operation - designed for high-precision data acquisition systems requiring fault-tolerant signal routing into high-input-impedance op amps or ADCs.
For engineers reviewing the MAX328CWE+T datasheet, MAX328CWE+T pinout, MAX328CWE+T application, or MAX328CWE+T equivalent, key selection criteria include leakage-critical channel switching, rail-to-rail analog signal range, break-before-make timing (0.2µs), and compatibility with DG508/MAX358 in legacy industrial control and aircraft HUD designs.
Technical Context
The MAX328CWE+T implements a CMOS transmission-gate architecture with latchup-proof construction and TTL/CMOS-compatible digital inputs (VAL ≤0.8V, VAH ≥2.4V). Its address decoding logic (A0–A2) selects one of eight bidirectional analog channels (S1–S8) to connect to the common D terminal under EN control.
It supports unbalanced supply configurations (e.g., +12V/–5V), maintains analog signal range across rails (±15V), and achieves sub-1.5µs transition time with 0.7µs enable turn-off delay - enabling use in sequential 120V AC fault-tolerant mux circuits using external 39kΩ resistors without external diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail input/output swing with ±15V supplies, enabling direct interface to sensors and precision amplifiers. |
| Drain-Source On-Resistance | 2.5kΩ typ - ensures minimal voltage drop and gain error when routing µA-level signals into high-Z loads. |
| Off-Leakage Current | 1pA typ at +25°C - critical for maintaining <40nV error in 40kΩ fault-protection networks and preserving 17-bit resolution over temperature. |
| Switching Time | 1.5µs max - enables fast channel sequencing in real-time data logging and control loop sampling. |
| Supply Voltage Range | ±5V to ±18V - allows flexible system integration with existing ±12V, ±15V, or asymmetric supplies like +12V/–5V. |
| Enable Turn-Off Time | 1.0µs max - guarantees clean channel isolation during state transitions in synchronous acquisition systems. |
| Off-Isolation | 84dB at 500kHz - suppresses crosstalk between inactive channels in multi-sensor monitoring applications. |
Pinout & Package
MAX328CWE+T is supplied in a 16-pin Wide SO (SOIC-W) RoHS-compliant package with exposed pad (EP), footprint compatible with industry-standard 16-pin wide-body SOIC land pattern 90-0107.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | V− | Negative supply rail connection - must be decoupled to GND; sets lower bound of analog signal range. |
| 2, 4–7 | S1–S4 | Bidirectional analog inputs - routed to D when selected; support high-source-impedance sensor interfaces. |
| 8 | D | Common analog I/O terminal - connects to op amp input or ADC sample-hold node; bidirectional signal path. |
| 9–12 | S8–S5 | Bidirectional analog inputs - continuation of S1–S4 set; full 8-channel single-ended topology. |
| 13 | A2 | MSB address input - controls channel selection with A1/A0 per truth table; TTL/CMOS logic compatible. |
| 14 | A1 | Address input - used with A0/A2 to decode 1-of-8 channel; low input current (<1µA) minimizes loading. |
| 15 | A0 | LSB address input - completes 3-bit binary address; valid logic levels defined as VAL ≤0.8V / VAH ≥2.4V. |
| 16 | EN | Enable control - high-active; disables all switches when low, providing power-down isolation and system-level gating. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-leakage | 1pA typ at +25°C - enables indefinite 120V AC fault tolerance with 39kΩ series resistors and <0.39µV signal error. |
| Bidirectional operation | Supports mux or demux mode - allows reuse in both sensor-to-ADC and DAC-to-actuator signal paths without redesign. |
| Rail-to-rail analog range | Operates with signals extending to V+ and V− rails - eliminates level-shifting needs in ±15V systems. |
| Break-before-make timing | 0.2µs interval - prevents momentary shorting between channels during address changes, critical for safety-critical routing. |
| Pin compatibility | Direct replacement for DG508 and MAX358 - enables drop-in upgrade in legacy designs without PCB revision. |
Applications
| Industrial Data Logging | Aircraft Heads-Up Display (HUD) |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge outputs in a ruggedized field data logger operating at ±15V. IC Role / Device Role / Timing Role: Single-ended 1-of-8 analog switch routing low-current sensor signals to a 24-bit sigma-delta ADC with no added offset error. Use Value: 1pA leakage ensures <1µV total error contribution across 8 channels, preserving 17-bit effective resolution over –40°C to +85°C. |
Use Scenario: Routing multiple video sync, symbol generator, and brightness control signals in an avionics HUD display controller. IC Role / Device Role / Timing Role: Fault-tolerant analog switch protecting downstream video drivers from 120V AC transients induced by nearby power systems. Use Value: Internal diode clamping and guaranteed 110V AC fault withstand eliminate need for external protection diodes, reducing BOM count and board area. |
| Medical Patient Monitoring | Test & Measurement Equipment |
Use Scenario: Selecting ECG, EEG, and respiration sensor inputs in a portable patient monitor powered by ±12V isolated supplies. IC Role / Device Role / Timing Role: High-isolation (84dB) analog multiplexer preventing cross-talk between bio-potential channels during simultaneous acquisition. Use Value: 2.5kΩ on-resistance and rail-to-rail swing maintain signal fidelity across ±10V physiological ranges without gain compression or clipping. |
Use Scenario: Channel selection in automated test equipment performing parametric measurements on DUTs with floating grounds. IC Role / Device Role / Timing Role: Bidirectional analog switch supporting both stimulus injection and response sensing through shared probe connections. Use Value: Sub-1.5µs switching and 0.2µs break-before-make ensure accurate timing alignment between source and measurement phases in high-speed ATE sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DG508ACJ+ | Higher on-leakage (100pA typ), 100Ω higher RDS(ON), no fault-tolerance design | Lacks integrated fault protection; requires external diodes and resistors for 120V AC rating | Select when cost sensitivity outweighs leakage-critical performance and fault robustness. |
| MAX358CWE+ | Same pinout and leakage specs, but rated only for 0°C to +70°C commercial temp range (no extended temp option) | Not qualified for industrial or automotive environments requiring –40°C to +85°C operation | Choose for cost-optimized commercial-grade systems where extended temperature is unnecessary. |
Compared with DG508ACJ+, the MAX328CWE+T delivers 100× lower leakage and integrated fault tolerance; versus MAX358CWE+, it shares identical electrical behavior but offers broader temperature qualification - making it optimal for high-reliability industrial and aerospace deployments.
Availability
MAX328CWE+T is available at Aetrix Electronics and suitable for industrial data logging, aircraft HUD systems, and medical patient monitoring requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX328CWE+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, communications, and consumer applications.
The MAX328CWE+T belongs to Maxim's ultra-low-leakage analog multiplexer product line, engineered specifically for precision data acquisition and fault-tolerant signal routing in harsh electrical environments.
FAQ
What is the maximum continuous analog signal voltage range supported by the MAX328CWE+T?
The MAX328CWE+T supports an analog signal range of ±15V when operated with ±15V supplies, and maintains rail-to-rail operation - meaning signals can extend from V− to V+ without clipping. This is confirmed in the Electrical Characteristics table under "Analog Signal Range" (VANALOG = –15V to +15V) and applies directly to the MAX328CWE+T across its 0°C to +70°C operating temperature range.
Does the MAX328CWE+T require external protection components to withstand 120V AC faults?
No, the MAX328CWE+T does not require external diodes for 120V AC fault protection. Its internal diode structure limits input voltage to ±15.7V with ±15V supplies. When paired with external 39kΩ 1/2W resistors (as shown in Figure 4 of the datasheet), the MAX328CWE+T indefinitely withstands 120V AC faults - a capability verified in the Applications Information section and confirmed for the MAX328CWE+T package variant.
Is the MAX328CWE+T pin-compatible with the DG508 series?
Yes, the MAX328CWE+T is explicitly specified as a pin-for-pin replacement for the DG508/DG509 in the General Description and Features sections. Pin mapping (A0–A2, EN, S1–S8, D, V+, V−, GND) matches exactly between MAX328CWE+T and DG508ACJ+, enabling drop-in upgrades without layout changes - a claim validated across all MAX328C-grade temperature variants including MAX328CWE+T.
What is the typical on-resistance of the MAX328CWE+T and how does it affect signal accuracy?
The MAX328CWE+T has a typical drain-source on-resistance (RDS(ON)) of 2.5kΩ at ±15V supplies and +25°C. This value directly impacts signal accuracy by introducing a voltage drop proportional to channel current; for example, with 1µA sensor current, the drop is just 2.5mV - ensuring minimal gain error in high-impedance data acquisition paths where the MAX328CWE+T is commonly deployed.
Can the MAX328CWE+T operate from a single supply, and what is the minimum required voltage?
Yes, the MAX328CWE+T supports single-supply operation from 10V to 30V, as stated in the General Description. The minimum single-supply voltage is 10V - below which guaranteed performance (including on-resistance, leakage, and switching speed) is not assured. This capability enables use in battery-powered portable instrumentation where dual supplies are impractical, and applies identically to the MAX328CWE+T variant.
MAX328CWE+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:
- 1
- On-State Resistance (Max):
- 3.5kOhm
- Channel-to-Channel Matching (ΔRon):
- 70Ohm
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 1.5µs, 1µs
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 1.8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 10pA
- Crosstalk:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX328CWE+T FAQ
1.How can I place an order for MAX328CWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX328CWE+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 MAX328CWE+T reliable?
The price and inventory of MAX328CWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX328CWE+T is usually 5 days.
3.What payment methods are accepted for MAX328CWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX328CWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX328CWE+T?
MAX328CWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX328CWE+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 MAX328CWE+T?
For technical support, including MAX328CWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX328CWE+T requirements.
6.How does Aetrix verify that MAX328CWE+T is sourced from the original manufacturer or authorized distributors?
All MAX328CWE+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 MAX328CWE+T meets industry standards.
7.What is the process for return or replacement of MAX328CWE+T?
All MAX328CWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX328CWE+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 MAX328CWE+T part is unused and in its original packaging.
Return procedure for MAX328CWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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