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Analog Devices Inc./Maxim Integrated MAX379CWG+TG035
- Part No.:
- MAX379CWG+TG035
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX379CWG+TG035.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
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Inventory:2,147
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Product details
Overview
MAX379CWG+TG035 from Maxim Integrated is a 4-channel differential (2-of-8) fault-protected analog multiplexer with ±60V continuous input tolerance under ±15V supplies, series N/P/N FET protection architecture, <2mW power dissipation, and break-before-make switching. It serves as a high-reliability signal routing device in industrial data acquisition front ends where sensor overvoltage and power-loss scenarios are common.
For engineers reviewing the MAX379CWG+TG035 datasheet, MAX379CWG+TG035 pinout, MAX379CWG+TG035 application, or MAX379CWG+TG035 equivalent, this page delivers verified specifications, validated package mapping to 24-pin Wide SO, confirmed differential channel operation, real-world fault-protection behavior under power-off conditions, and two technically documented alternative parts for design continuity.
Technical Context
The MAX379CWG+TG035 implements a three-FET series structure (N–P–N) per channel that actively blocks fault currents at nanoamp levels when V+ or V− is absent, unlike first-generation current-limited muxes. Its digital interface accepts TTL/CMOS logic thresholds (0.8V/2.4V) without pull-ups and guarantees break-before-make timing of 25–200ns.
Under ±15V supplies, it supports ±60V continuous analog input on enabled or disabled channels, limits ON-resistance to 2.0–3.5kΩ across ±10V input range, and maintains sub-50nA OFF-state leakage even at ±60V overvoltage - all while operating from ±4.5V to ±18V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | 4-channel differential (2-of-8), dual-output (OUTA/OUTB) |
| Fault Protection | ±75V input with supplies off; ±60V continuous with ±15V supplies |
| ON Resistance | 2.0–3.5kΩ @ ±10V input, +25°C - defines voltage error in precision signal paths |
| Leakage Current | <50nA OFF-state at ±60V - prevents loading of high-Z sensors or reference sources |
| Supply Range | ±4.5V to ±18V - enables operation from single +9V to +22V or asymmetrical rails like +15V/−5V |
| Switching Speed | tA = 0.5–1.0μs; tON–tOFF = 25–200ns - ensures clean channel isolation during reconfiguration |
| Logic Compatibility | TTL/CMOS inputs (0.8V/2.4V thresholds) - eliminates need for level-shifting or pull-up resistors |
Pinout & Package
MAX379CWG+TG035 is housed in a 24-pin Wide SO (Small Outline) package, 0.300-inch body width, with gull-wing leads and standard JEDEC MO-153 footprint. Pin 1 is marked by a beveled corner; substrate may float or connect to V+ per JI CMOS configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | IN1A, IN2A, IN3A, IN4A, IN1B, IN2B, IN3B, IN4B | Differential input pairs - each A/B pair routed independently to OUTA/OUTB |
| 9, 10 | OUTA, OUTB | Differential outputs - support balanced signal routing and noise rejection |
| 11 | EN | Active-high enable - disables all channels when low; TTL/CMOS compatible |
| 12, 13 | A0, A1 | Binary address inputs - select one of four differential channels (00–11) |
| 14 | GND | Analog/digital ground reference - forms isolation barrier between digital and analog sections |
| 15, 16 | V+, V− | Split analog supply rails - define output swing limits and fault-protection thresholds |
| 17–24 | N.C. | No-connect pins - electrically isolated; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Fault-protected architecture | Series N–P–N FET structure limits input fault current to <100nA even at ±75V with supplies off |
| Dual differential outputs | Independent OUTA/OUTB pins enable true differential signal routing without external inversion |
| Power-loss safety | All channels auto-disable when V+/V− are removed - prevents back-driving and sensor damage |
| Overvoltage shutdown | ON channel turns OFF if input exceeds +13.5V or −12V - clamps output to safe range |
| Low charge injection | <5pC differential charge injection - minimizes transient errors in precision sampling systems |
Applications
| Industrial Data Acquisition | Avionics Test Equipment |
|---|---|
Use Scenario: Multiplexing thermocouple, strain gauge, and 4–20mA loop signals into a shared ADC front end under noisy, high-voltage field conditions. IC Role / Device Role / Timing Role: Fault-protected differential signal router with break-before-make switching and ±60V input tolerance. Use Value: Eliminates need for external protection diodes or preamplifiers; enables direct connection of ±75V-tolerant sensors during power-down. |
Use Scenario: Routing calibrated test signals between multiple aircraft subsystems (e.g., flight control, navigation, comms) during ground verification. IC Role / Device Role / Timing Role: High-isolation differential multiplexer ensuring signal integrity and preventing cross-system fault propagation. Use Value: Maintains >64dB off-isolation at 1MHz and sub-50nA leakage - critical for validating signal path integrity across redundant avionics buses. |
| Process Control Systems | Signal Routing Between Systems |
Use Scenario: Switching between multiple pressure, flow, and temperature transmitters in hazardous-area PLC I/O modules with intermittent power cycling. IC Role / Device Role / Timing Role: Power-fail-safe analog switch enabling hot-swap compatibility and zero-maintenance sensor interfacing. Use Value: Draws only nanoampere-level current during brownout - preserves sensor calibration and avoids latchup in SIL2-certified loops. |
Use Scenario: Interfacing legacy analog instrumentation (e.g., oscilloscopes, spectrum analyzers) with modern digital controllers via shared signal busses. IC Role / Device Role / Timing Role: Bidirectional differential demultiplexer supporting both mux and demux modes with full fault coverage. Use Value: Enables reverse signal flow (OUT → IN) without compromising ±60V protection - simplifies test fixture reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fault-protected analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX379EWG | Same die, −40°C to +85°C extended temp range; identical pinout and electrical specs | Required for industrial environments with wider thermal cycling or outdoor deployment | Select MAX379EWG when operating outside 0°C–70°C ambient or requiring AEC-Q200-aligned qualification evidence |
| ADG508FBRZ | 8-channel single-ended, ±40V fault protection, higher RDS(ON) (450Ω typ), no differential outputs | Suitable only for non-differential, lower-voltage (<±40V), higher-bandwidth (120MHz) applications | Choose ADG508FBRZ only if differential routing is unnecessary and system tolerates reduced fault margin and higher on-resistance error |
Compared with MAX379CWG+TG035, MAX379EWG offers identical functionality with extended temperature rating, while ADG508FBRZ trades differential capability and ±60V protection for higher speed and single-ended simplicity - neither is pin-compatible, but both serve overlapping signal-routing roles in fault-aware designs.
Availability
MAX379CWG+TG035 is available at Aetrix Electronics and suitable for industrial data acquisition, avionics test equipment, and process control systems requiring stable component supply, long-term lifecycle assurance, and guaranteed fault-protection performance.
Supply support for MAX379CWG+TG035 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 demanding industrial, automotive, and communications applications.
The MAX379CWG+TG035 belongs to Maxim's fault-protected analog multiplexer product line, engineered specifically for signal integrity preservation in harsh environments where sensor overvoltage, power interruption, and cross-channel coupling must be eliminated.
FAQ
What is the maximum continuous input voltage the MAX379CWG+TG035 supports with power supplies active?
The MAX379CWG+TG035 supports ±60V continuous analog input voltage when powered by ±15V supplies. This rating is guaranteed across the full operating temperature range and applies to both enabled and disabled channels. The device uses its series N–P–N FET structure to clamp conduction and limit leakage to under 50nA, preventing damage to downstream circuitry or connected sensors.
Does the MAX379CWG+TG035 support differential signal routing, and how is it implemented?
Yes, the MAX379CWG+TG035 natively supports differential routing via dedicated INxA/INxB input pairs and separate OUTA/OUTB outputs. Each of its four channels consists of matched A/B paths, enabling true differential signal selection without external inversion or passive components. This architecture preserves common-mode rejection and reduces noise susceptibility in high-precision measurement systems.
What happens to the MAX379CWG+TG035 channels when V+ and V− supplies are removed?
When V+ and V− are turned off, all channels of the MAX379CWG+TG035 automatically disable, drawing less than 100nA total input leakage current even at ±75V applied input. This behavior protects upstream sensors and downstream circuitry by maintaining high-impedance isolation - a core feature of its fault-protection architecture not found in standard analog switches.
Can the MAX379CWG+TG035 operate from a single supply, and what are the constraints?
Yes, the MAX379CWG+TG035 can operate from a single +9V to +22V supply by connecting V− to GND. In this mode, the output swing is limited to approximately +3.5V below V+ and 0V (GND), and digital thresholds remain centered near 1.6V. Full fault protection remains active, but the ±60V continuous rating applies only when using split supplies; single-supply fault margin is reduced per internal gate biasing.
Is the MAX379CWG+TG035 pin-compatible with other packages in the MAX379 family?
No - the MAX379CWG+TG035 uses a 24-pin Wide SO package, while MAX379CPE and MAX379CJE use 16-pin DIP and CERDIP packages respectively. Pin counts, layouts, and thermal characteristics differ significantly; PCB layout and thermal management must be redesigned for package substitution. Only MAX379EWG shares identical 24-pin Wide SO packaging and pinout.
MAX379CWG+TG035 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX379CWG+TG035 FAQ
1.How can I place an order for MAX379CWG+TG035 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX379CWG+TG035 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 MAX379CWG+TG035 reliable?
The price and inventory of MAX379CWG+TG035 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX379CWG+TG035 is usually 5 days.
3.What payment methods are accepted for MAX379CWG+TG035?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX379CWG+TG035 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX379CWG+TG035?
MAX379CWG+TG035 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX379CWG+TG035 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 MAX379CWG+TG035?
For technical support, including MAX379CWG+TG035 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX379CWG+TG035 requirements.
6.How does Aetrix verify that MAX379CWG+TG035 is sourced from the original manufacturer or authorized distributors?
All MAX379CWG+TG035 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 MAX379CWG+TG035 meets industry standards.
7.What is the process for return or replacement of MAX379CWG+TG035?
All MAX379CWG+TG035 units undergo pre-shipment inspection (PSI). If there is an issue with MAX379CWG+TG035, 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 MAX379CWG+TG035 part is unused and in its original packaging.
Return procedure for MAX379CWG+TG035:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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