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Analog Devices Inc./Maxim Integrated MAX382CWN
- Part No.:
- MAX382CWN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX382CWN.pdf
- Description:
- IC MUX 8:1 100OHM 18SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,405
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Product details
Overview
MAX382CWN from Maxim Integrated is an 8-channel, single-ended CMOS analog multiplexer with latchable digital inputs, designed for low-voltage signal routing in precision data-acquisition systems. It operates from a +2.7V to +16.5V single supply or ±3V to ±8V dual supplies, delivers ≤100Ω on-resistance (max), guarantees ≤4Ω channel-to-channel on-resistance matching, and supports TTL/CMOS logic compatibility - enabling reliable switching of ±4.5V analog signals in battery-powered test equipment.
For engineers reviewing the MAX382CWN datasheet, MAX382CWN pinout, MAX382CWN application, or MAX382CWN equivalent, this page provides verified electrical specifications, package-confirmed pin functions, real-world use scenarios in low-leakage signal paths, and two validated alternative parts with documented functional trade-offs for design continuity.
Technical Context
The MAX382CWN integrates parallel N- and P-channel MOSFET switches per channel, driven by internal address decoders and transparent/latched control logic. Its WR (Write) and RS (Reset) strobes enable µP-bus interfacing without continuous address holding, while EN (Enable) allows global channel disable for cascaded configurations.
It features guaranteed charge injection ≤10pC (max), off-leakage <2.5nA at +85°C, and ESD protection >2000V (HBM), all specified across 0°C to +70°C ambient. Analog signal range spans V− to V+, supporting ±4.5V operation with ±5V supplies and 0V–+5V with +5V single supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +2.7V to +16.5V single supply or ±3V to ±8V dual supply - enables direct integration into mixed-voltage industrial and portable systems without level-shifting. |
| On-Resistance (RON) | ≤100Ω max at TA = +25°C, V+ = +5V, V− = −5V - ensures minimal signal attenuation and gain error in precision sensor front-ends. |
| RON Matching | ≤4Ω max between channels - preserves amplitude consistency across multi-channel scanning in data loggers. |
| Charge Injection | ≤10pC max - limits voltage glitch on sample-and-hold capacitors, critical for 12-bit+ ADC accuracy. |
| Off-Leakage Current | <2.5nA at +85°C - maintains high-impedance integrity in battery-operated pH or thermocouple measurement circuits. |
| Logic Compatibility | TTL/CMOS-input thresholds (VIH ≥ 2.4V, VIL ≤ 0.8V) - allows direct connection to microcontrollers and FPGAs without interface buffers. |
| ESD Rating | >2000V HBM - meets IEC 61000-4-2 Level 2 for robustness in benchtop test instrumentation handling. |
Pinout & Package
MAX382CWN is housed in an 18-pin Wide SO (Small Outline) package, 0.300" wide, with gull-wing leads and standard JEDEC MS-013AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | WR | Write strobe input: latches current A0/A1/A2 address when rising edge occurs - enables µP-bus synchronization without address bus hold. |
| 2, 17 | A0, A1 | Binary address inputs: select one of eight NOx channels to connect to COM - supports sequential scanning via incrementing GPIO outputs. |
| 3 | EN | Enable input: disables all switches when low - used for power gating or fault isolation in multi-mux systems. |
| 4 | V− | Negative supply rail: tied to GND for single-supply operation; sets lower bound of analog signal range. |
| 5–8 | NO1–NO4 | Analog inputs/outputs: bidirectional, low-leakage terminals for signal sources - routed to COM when selected. |
| 9 | COM | Common analog terminal: single-ended output/input shared across all 8 channels - connects to ADC input or DAC output. |
| 10–13 | NO8–NO5 | Analog inputs/outputs: continuation of 8-channel set - NO5–NO8 complete full 1-of-8 selection matrix. |
| 14 | V+ | Positive supply rail: defines upper analog signal limit; must be ≥2.7V for guaranteed operation. |
| 15 | GND | Ground reference: return path for logic and analog sections - requires low-impedance PCB plane for noise immunity. |
| 16, 18 | A2, RS | A2: MSB address bit; RS: reset input - forces all switches open when low, overriding latched state for safe startup or fault recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement | Direct drop-in for DG428/DG429 and MAX368/MAX369 - eliminates PCB redesign when upgrading to lower leakage or wider supply range. |
| Latched vs. transparent mode | Configurable via WR/RS timing - supports both static channel selection (latched) and real-time µP control (transparent) in same hardware. |
| Low on-resistance flatness | ≤13Ω over ±4.5V signal range - minimizes THD and gain nonlinearity in audio routing applications. |
| Guaranteed break-before-make | tOPEN ≥ 100ns - prevents momentary shorting during channel transitions, protecting sensitive transducer outputs. |
| Single-supply usability | Operates down to +2.7V with full functionality - extends battery life in handheld multimeters and portable DAQ units. |
Applications
| Battery-Operated Test Equipment | Audio Signal Routing |
|---|---|
Use Scenario: Portable handheld DMMs performing automated multi-point resistance and continuity checks. IC Role / Device Role / Timing Role: 8-channel analog mux routes test probes to internal ohmmeter circuitry under µP control; WR strobe captures address during probe contact. Use Value: Low 2.5nA off-leakage at +85°C prevents false continuity readings; 100Ω RON ensures <0.1% measurement error on 1kΩ ranges. |
Use Scenario: Studio-grade mixer console selecting between 8 microphone preamp outputs before summing. IC Role / Device Role / Timing Role: Single-ended analog switch array routing mic-level signals (±2V) to common bus; EN pin mutes entire section during channel solo. Use Value: ≤10pC charge injection avoids audible pop/click during live switching; 13Ω RON flatness preserves frequency response flatness up to 20kHz. |
| Low-Voltage Data-Acquisition Systems | Sample-and-Hold Circuits |
Use Scenario: Industrial temperature logger sampling 8 RTD or thermocouple channels using a single 16-bit SAR ADC. IC Role / Device Role / Timing Role: Precision analog multiplexer feeding conditioned sensor signals to ADC input; RS pin resets all channels before each scan cycle. Use Value: ≤4Ω RON matching ensures consistent gain scaling across channels; <2.5nA leakage avoids drift in high-impedance sensor bridges. |
Use Scenario: High-speed data acquisition system capturing transient waveforms with 1MSPS sampling rate. IC Role / Device Role / Timing Role: Front-end signal selector driving hold capacitor; WR pulse synchronizes channel selection with ADC conversion start. Use Value: 100ns tON(EN) and 100ns tOPEN guarantee clean aperture timing; 10pC charge injection limits hold-step error to <1LSB at 16-bit resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX368CPN | No latchable inputs; requires continuous address drive; higher 200Ω RON (max); same 18-pin DIP package. | Suitable only where µP can maintain stable address lines; not viable for low-power sleep-mode operation. | Select MAX368CPN only if latch functionality is unnecessary and board space allows DIP footprint. |
| DG428DN | Same pinout and function but higher 500Ω RON (max); no guaranteed RON matching; 100nA off-leakage at +85°C. | Acceptable for non-precision DC-coupled switching but unsuitable for 12-bit+ data acquisition or low-leakage sensor interfaces. | Choose DG428DN only for cost-sensitive, non-critical signal routing where leakage and matching are not design constraints. |
Compared with MAX382CWN, MAX368CPN lacks latching and has double the on-resistance, limiting dynamic range; DG428DN offers identical pinout but sacrifices 20× higher leakage and unguaranteed matching - making MAX382CWN the sole choice for battery-powered, precision, or µP-bus-constrained designs.
Availability
MAX382CWN is available at Aetrix Electronics and suitable for battery-operated test equipment, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for MAX382CWN 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX382/MAX384 product line was engineered specifically for low-leakage, low-on-resistance analog multiplexing in portable and precision measurement systems - emphasizing latchable control, wide supply flexibility, and guaranteed matching for multi-channel integrity.
FAQ
What is the maximum analog signal voltage range supported by the MAX382CWN?
The MAX382CWN supports analog signals from V− to V+. With ±5V dual supplies, this yields a ±4.5V range; with +5V single supply (V− = GND), it supports 0V to +4.5V. The absolute maximum is limited by the supply rails - never exceed V+ − V− > 17V. Operation outside these bounds risks permanent damage per Absolute Maximum Ratings.
Does the MAX382CWN require external pull-up resistors on its logic inputs?
No, the MAX382CWN does not require external pull-ups. Its logic inputs (A0, A1, A2, EN, WR, RS) have TTL/CMOS-compatible thresholds (VIH ≥ 2.4V, VIL ≤ 0.8V) and internally biased input structures that accept direct connection to microcontroller GPIOs or FPGA outputs without external biasing components.
Can the MAX382CWN operate with unbalanced supplies like +10V and −5V?
Yes, the MAX382CWN supports unbalanced supplies such as +10V and −5V, provided the total differential (V+ − V−) does not exceed 17V and each rail stays within its absolute rating (V+ ≤ +17V, V− ≥ −17V). This configuration extends the analog signal range to −5V to +10V, useful in hybrid power-rail systems.
How does the WR (Write) strobe function differ from standard address decoding in the MAX382CWN?
The WR strobe in the MAX382CWN captures and holds the current A0/A1/A2 address state on its rising edge, enabling latched operation. Unlike standard decoders that respond continuously to address changes, the MAX382CWN retains channel selection even if address lines float or change - reducing µP bus loading and enabling low-power modes where GPIOs may be tri-stated.
Is the MAX382CWN pin-compatible with the MAX382EWN or MAX382EPN variants?
Yes, the MAX382CWN is fully pin-compatible with MAX382EWN (−40°C to +85°C) and MAX382EPN (0°C to +70°C, 18-pin DIP), sharing identical pinout, electrical behavior, and functional timing. Only temperature grade and package (Wide SO vs. DIP) differ - allowing direct substitution where thermal or mechanical constraints permit.
MAX382CWN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 4Ohm (Max)
- Voltage - Supply, Single (V+):
- 2.7V ~ 16.5V
- Voltage - Supply, Dual (V±):
- ±3V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 150ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 11pF, 40pF
- Current - Leakage (IS(off)) (Max):
- 200pA
- Crosstalk:
- -92dB @ 100kHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-SOIC
MAX382CWN FAQ
1.How can I place an order for MAX382CWN through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX382CWN 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 MAX382CWN reliable?
The price and inventory of MAX382CWN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX382CWN is usually 5 days.
3.What payment methods are accepted for MAX382CWN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX382CWN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX382CWN?
MAX382CWN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX382CWN 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 MAX382CWN?
For technical support, including MAX382CWN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX382CWN requirements.
6.How does Aetrix verify that MAX382CWN is sourced from the original manufacturer or authorized distributors?
All MAX382CWN 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 MAX382CWN meets industry standards.
7.What is the process for return or replacement of MAX382CWN?
All MAX382CWN units undergo pre-shipment inspection (PSI). If there is an issue with MAX382CWN, 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 MAX382CWN part is unused and in its original packaging.
Return procedure for MAX382CWN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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