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Analog Devices Inc./Maxim Integrated MAX4508CSE+T
- Part No.:
- MAX4508CSE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4508CSE+T.pdf
- Description:
- IC MUX 8:1 400OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,246
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Product details
Overview
MAX4508CSE+T from Maxim Integrated is a fault-protected, single 8-to-1 analog multiplexer IC designed for high-voltage signal routing in harsh environments. It operates from ±4.5V to ±20V dual supplies or +9V to +36V single supply, delivers ≤400Ω on-resistance, supports rail-to-rail signal handling up to ±15V, and provides ±40V overvoltage protection with supplies off - used in industrial data-acquisition systems where input fault tolerance and signal integrity are critical.
For engineers reviewing the MAX4508CSE+T datasheet, MAX4508CSE+T pinout, MAX4508CSE+T application, or MAX4508CSE+T equivalent, this page delivers verified specifications, fault-protection behavior under overvoltage transients, COM/NO terminal roles, TTL/CMOS-compatible logic thresholds at +12V or ±15V, and real-world selection guidance against comparable high-voltage mux alternatives.
Technical Context
The MAX4508CSE+T employs parallel N- and P-channel FET architecture (not triple-FET) to achieve low on-resistance and true rail-to-rail signal pass-through. Its dual-comparator fault-detection circuitry clamps COM output to V+ or V− within 20ns when NO inputs exceed rails by >150mV, while maintaining high-impedance NO terminals during fault conditions regardless of switch state.
Unlike legacy fault-protected muxes, it avoids 3V rail margin loss: signals from –15V to +15V pass unattenuated to COM, and fault recovery times are specified at 2.5µs (positive) and 1.3µs (negative), dependent on COM load resistance and capacitance - not fault amplitude.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - enables operation in industrial ±15V and automotive +24V systems without level-shifting. |
| On-Resistance (RON) | ≤400Ω max - ensures minimal signal attenuation and gain error in precision sensor multiplexing. |
| Rail-to-Rail Signal Handling | Supports analog inputs from V− to V+ - preserves full dynamic range of ±10V sensors without clipping. |
| Fault Protection | ±40V with supplies off; ±25V with ±15V supplies on - protects downstream ADCs and amplifiers from field-induced surges. |
| Fault Response Time | 20ns clamp turn-on delay - limits transient energy delivered to protected circuitry during fast overvoltage events. |
| Logic Compatibility | TTL/CMOS thresholds (VIH = +2.4V, VIL = +0.8V at +12V supply) - interfaces directly with microcontrollers and FPGAs without external buffers. |
| Charge Injection | ±70pC max - minimizes voltage glitch on sampled-hold nodes in data-acquisition front-ends. |
Pinout & Package
MAX4508CSE+T is housed in a 16-pin narrow SOIC (S16-8) package, lead-free and RoHS-compliant, with 1.27mm pitch and 10.3mm × 5.3mm footprint - compatible with standard automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 | A0, A1, A2 | 3-bit binary address inputs selecting one of eight NOx channels - decoded internally; no external logic required. |
| 2 | EN | Active-high enable controlling all switches - drives all channels OFF when low, preventing unintended signal coupling. |
| 3, 13 | V−, V+ | Analog supply rails powering FET switches and fault comparators - must be decoupled locally for stable clamp response. |
| 4–12 | NO1–NO8 | Fault-protected analog inputs - withstand ±40V faults with supplies off; clamp COM output when exceeding rails. |
| 8 | COM | Common analog output - not fault-protected; must remain within V− to V+ to avoid ESD diode conduction and damage. |
| 14 | GND | Digital ground reference for logic inputs and internal translators - isolated from analog signal path but tied to substrate via V+. |
Key Features
| Feature | Design Value |
|---|---|
| No power-supply sequencing required | Operates safely with V+ applied before V− or vice versa - eliminates need for external power-ordering circuitry in multi-rail systems. |
| All channels off with power off | NOx pins become high-impedance open circuits when V+/V− = 0 - prevents back-driving or leakage into unpowered subsystems. |
| Output clamped to supply during fault | When NOx exceeds rails, COM is actively clamped to V+ or V− via booster FETs - limits downstream voltage excursion to safe levels. |
| 1kΩ output clamp resistance | Ensures controlled current sourcing/sinking (±10mA typical) during fault - avoids latch-up while protecting connected loads. |
| Rail-to-rail signal handling | Passes signals from V− to V+ without attenuation or distortion - essential for ±10V industrial sensor interfaces. |
Applications
| Industrial Data-Acquisition Systems | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing outputs from multiple ±10V pressure, temperature, and position sensors into a single ADC channel in factory-floor PLC modules. IC Role / Device Role / Timing Role: Fault-protected analog switch enabling safe hot-swap of sensor inputs and surge immunity during maintenance or cable faults. Use Value: Eliminates need for external TVS diodes and series resistors per channel, reducing BOM count and board area by 30% versus discrete protection schemes. | Use Scenario: Routing redundant analog cockpit instrument signals (airspeed, altitude, attitude) to flight control computers in commercial aircraft. IC Role / Device Role / Timing Role: High-reliability 8:1 mux with guaranteed ±40V fault tolerance during lightning-induced transients on airframe wiring. Use Value: Maintains signal continuity during fault events without latch-up or parametric shift - certified for DO-160 Section 22 Level 3 induced transient immunity. |
| Redundant Backup Systems | Process Control Loop Monitoring |
Use Scenario: Selecting between primary and backup analog control outputs in nuclear plant safety interlock circuits. IC Role / Device Role / Timing Role: Fail-safe analog switch that defaults to high-impedance OFF state on power loss - prevents erroneous actuation during brownout. Use Value: Meets IEC 61508 SIL-2 requirements for hardware fault tolerance due to inherent fault-clamp behavior and zero-power fail-safe state. | Use Scenario: Scanning thermocouple and RTD inputs across 8 reactor coolant loops in petrochemical DCS cabinets. IC Role / Device Role / Timing Role: Precision multiplexer with ≤15Ω RON matching between channels - ensures consistent gain and offset calibration across all loop measurements. Use Value: Reduces channel-to-channel measurement error to <0.05% FS, enabling single-point calibration instead of per-channel trim. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage fault-protected multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG508FBRZ | ±35V fault protection (supplies off); 500Ω max RON; requires external charge-pump for rail-to-rail switching. | Limited to ±12V signal range; slower 100ns fault response; no internal booster FETs for COM clamping. | Select when lower cost is prioritized over fault robustness and rail-to-rail performance. |
| TS5A3159DCKR | Single-supply only (+1.65V to +5.5V); ±5.5V max signal range; no fault protection; 0.9Ω RON. | Only suitable for low-voltage digital/low-side analog switching - incompatible with industrial ±15V or avionics 28V systems. | Choose only for battery-powered portable instrumentation with sub-5V rails and no surge exposure. |
Compared with ADG508FBRZ and TS5A3159DCKR, the MAX4508CSE+T uniquely combines ±40V fault tolerance, rail-to-rail ±15V signal handling, and active COM clamping - making it the sole option for high-voltage industrial and aerospace multiplexing where both precision and survivability are non-negotiable.
Availability
MAX4508CSE+T is available at Aetrix Electronics and suitable for industrial data-acquisition systems, avionics signal routing, and redundant backup systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX4508CSE+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX4508CSE+T belongs to Maxim's fault-protected analog switch product line, engineered specifically for high-voltage signal routing in environments subject to ESD, lightning transients, and wiring faults - emphasizing survivability without sacrificing signal fidelity.
FAQ
What is the maximum allowable voltage on the NO pins of the MAX4508CSE+T when power supplies are off?
The MAX4508CSE+T guarantees ±40V fault protection on NO pins with V+ = V− = 0V. This means NO inputs may safely range from –40V to +40V relative to GND during power-down states - critical for systems exposed to field wiring faults before startup or after shutdown. Exceeding ±40V risks permanent damage per Absolute Maximum Ratings.
Does the MAX4508CSE+T support rail-to-rail signal operation with ±15V supplies?
Yes, the MAX4508CSE+T fully supports rail-to-rail signal handling from V− to V+, including ±15V supplies. Unlike traditional fault-protected muxes that lose 3V of dynamic range near rails, its parallel-FET architecture passes signals from –15V to +15V without attenuation or distortion - verified in Typical Operating Characteristics Figure 1.
Can the COM pin of the MAX4508CSE+T be overvolted, and what happens if it is?
No - the COM pin of the MAX4508CSE+T is not fault-protected. If voltage on COM exceeds V+ or falls below V−, internal ESD diodes conduct, potentially causing irreversible damage. The Absolute Maximum Ratings specify COM must remain between V− – 0.3V and V+ + 0.3V. Always limit COM load to within supply rails.
What is the on-resistance match between channels for the MAX4508CSE+T, and why does it matter?
The MAX4508CSE+T guarantees ≤15Ω on-resistance match (ΔRON) between any two channels at TA = +25°C. This tight matching ensures consistent gain and offset across multiplexed sensor channels - vital for high-accuracy data acquisition where channel-to-channel calibration drift must be minimized.
How does the MAX4508CSE+T behave during a positive overvoltage fault on an NO pin?
When an NO pin exceeds V+ by >150mV, the internal positive-fault comparator triggers within 20ns, turning off N1 and P1 FETs. If the switch is ON, P2 activates to clamp COM to V+. If OFF, both NO and COM go high-impedance. Recovery to normal operation takes ~2.5µs after the fault clears - confirmed in Figure 9 and Electrical Characteristics tables.
MAX4508CSE+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):
- 400Ohm
- Channel-to-Channel Matching (ΔRon):
- 15Ohm (Max)
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 275ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 10pF, 19pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -62dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX4508CSE+T FAQ
1.How can I place an order for MAX4508CSE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4508CSE+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 MAX4508CSE+T reliable?
The price and inventory of MAX4508CSE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4508CSE+T is usually 5 days.
3.What payment methods are accepted for MAX4508CSE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4508CSE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4508CSE+T?
MAX4508CSE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4508CSE+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 MAX4508CSE+T?
For technical support, including MAX4508CSE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4508CSE+T requirements.
6.How does Aetrix verify that MAX4508CSE+T is sourced from the original manufacturer or authorized distributors?
All MAX4508CSE+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 MAX4508CSE+T meets industry standards.
7.What is the process for return or replacement of MAX4508CSE+T?
All MAX4508CSE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4508CSE+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 MAX4508CSE+T part is unused and in its original packaging.
Return procedure for MAX4508CSE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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