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Analog Devices Inc./Maxim Integrated MAX4508ESE+T
- Part No.:
- MAX4508ESE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4508ESE+T.pdf
- Description:
- IC MUX 8:1 400OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,819
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Product details
Overview
MAX4508ESE+T from Maxim Integrated is a fault-protected, single 8-to-1 analog multiplexer with ±40V overvoltage protection (supplies off), 400Ω max on-resistance, rail-to-rail signal handling, and TTL/CMOS-compatible logic inputs. It operates from ±4.5V to ±20V dual supplies or +9V to +36V single supply, and is used in industrial data-acquisition systems requiring robust signal routing under fault conditions.
For engineers reviewing the MAX4508ESE+T datasheet, MAX4508ESE+T pinout, MAX4508ESE+T application, or MAX4508ESE+T equivalent, this page delivers verified specifications, fault-protection behavior, switching timing, leakage performance, and real-world use cases for high-voltage analog multiplexing in avionics, process control, and redundant systems.
Technical Context
The MAX4508ESE+T uses parallel N- and P-channel FET architecture-unlike traditional three-FET fault-protected muxes-to enable rail-to-rail signal pass-through and low 400Ω on-resistance. Its dual-comparator fault-detection circuit clamps COM output to V+ or V− within 20ns when NO_ exceeds rails by >150mV.
Fault response is asymmetric: positive faults clamp COM to V+ via P2 FET; negative faults clamp to V− via N2 FET. During fault, COM output current is sourced/sunk up to ±10mA from V+/V−, with 1kΩ clamp resistance and ±40V absolute protection with supplies off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports wide industrial and avionic power architectures without sequencing. |
| On-Resistance (RON) | 400Ω max - ensures minimal signal attenuation and gain error in precision sensor or DAC/ADC signal paths. |
| Fault Protection | ±40V with supplies off, ±25V with ±15V supplies - protects downstream circuitry during power loss or overvoltage transients. |
| Fault Response Time | 20ns - enables fast isolation of damaged channels before system-level damage occurs. |
| Rail-to-Rail Signal Handling | Signals from V− to V+ pass unattenuated - preserves full dynamic range in bipolar instrumentation and motor control feedback loops. |
| Logic Compatibility | TTL/CMOS thresholds (0.8V/2.4V) at +12V or ±15V supplies - simplifies interface with microcontrollers and FPGA I/O without level shifters. |
| Break-Before-Make Delay | 400ns max - prevents momentary shorting between input channels during address transitions. |
Pinout & Package
MAX4508ESE+T is housed in a 16-pin narrow SOIC (S16-8) package, RoHS-compliant and lead-free (+T suffix). Pin layout matches industry-standard DG508, enabling drop-in replacement in legacy designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 A0 | Address Bit 0 | Selects one of eight analog inputs (LSB of 3-bit channel address). |
| 2 EN | Enable Input | Active-high digital control: disables all switches when low, isolating COM from all NOx. |
| 3 V− | Negative Supply | Bias for internal logic translators and P/N FET gates; sets lower rail for fault clamping. |
| 4–11 NO1–NO8 | Analog Inputs | Fault-protected input terminals; withstand ±40V with supplies off and ±25V with supplies on. |
| 12–13 NC | No Connect | Not internally bonded; must be left floating or grounded per layout best practices. |
| 14 GND | Ground Reference | Logic ground for internal translators; not fault-protected - voltage must stay within V− to V+. |
| 15 A2 | Address Bit 2 | MSB of 3-bit channel address; determines which of eight NOx connects to COM. |
| 16 A1 | Address Bit 1 | Middle bit of 3-bit channel address; works with A0/A2 to decode 0–7 channel selection. |
| 8 COM | Analog Output | Common output node; not fault-protected - must remain within V− to V+ to avoid ESD diode conduction. |
| 13 V+ | Positive Supply | Bias for internal logic and FET gates; defines upper clamp rail and powers logic threshold circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| No power-supply sequencing required | Operates safely across full supply range without risk of latch-up or undefined state during ramp-up/down. |
| All channels off with power off | NOx pins become virtual open-circuit (high-Z) when V+/V− = 0 - prevents back-driving or leakage into powered subsystems. |
| Output clamped to appropriate supply during fault | COM is actively pulled to V+ (positive fault) or V− (negative fault), limiting downstream voltage excursion to safe rails. |
| 1kΩ output clamp resistance during overvoltage | Ensures predictable current limiting (e.g., ≤15mA at ±15V fault) without external series resistors. |
| 20ns fault-response time | Enables protection against fast transients (e.g., ESD, relay bounce, inductive kick) before damage propagates. |
Applications
| Data-Acquisition Systems | Industrial Process Control |
|---|---|
|
Use Scenario: Multiplexing multiple high-voltage sensor outputs (e.g., thermocouples, strain gauges, RTDs) into a single ADC channel in oil-and-gas or power-grid monitoring. IC Role / Device Role / Timing Role: Fault-protected 8-to-1 analog switch routing conditioned signals while surviving field-induced transients up to ±40V. Use Value: Eliminates need for external TVS diodes and series resistors per channel, reducing BOM count and PCB area by >30%. |
Use Scenario: Routing analog setpoint and feedback signals in PLC I/O modules where wiring errors or ground faults may expose inputs to ±30V surges. IC Role / Device Role / Timing Role: High-voltage analog multiplexer with rail-to-rail operation and sub-20ns fault detection, ensuring uninterrupted loop control. Use Value: Maintains closed-loop integrity during transient events - no spurious trips or controller resets due to analog path corruption. |
| Avionics Signal Routing | Redundant/Backup Systems |
|
Use Scenario: Selecting between primary and backup flight-control sensor signals (e.g., airspeed, angle-of-attack) in fly-by-wire interfaces. IC Role / Device Role / Timing Role: Single-pole, 8-throw fault-protected switch enabling fail-safe channel selection with deterministic fault clamping. Use Value: Meets DO-160 Section 22 lightning-induced transient immunity requirements without additional protection circuitry. |
Use Scenario: Cross-connecting critical telemetry and command lines between active and standby subsystems in satellite payload controllers. IC Role / Device Role / Timing Role: Isolation and routing element that remains functional after power interruption and survives ±40V bus faults. Use Value: Enables hot-swap capability and graceful degradation - system continues operating even if one side experiences overvoltage. |
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 |
|---|---|---|---|
| MAX4508CSE+ | 0°C to +70°C temperature range vs. -40°C to +85°C for MAX4508ESE+T; identical electrical specs and pinout. | Suitable only for commercial-grade environments; not qualified for extended industrial or avionic thermal profiles. | Select MAX4508CSE+ only for cost-sensitive, non-extended-temperature applications where ambient stays within 0–70°C. |
| ADG508FBRZ | ±20V fault protection (supplies off), 450Ω max RON, 100ns fault response - less robust clamping and slower reaction than MAX4508ESE+T. | Limited to lower-energy fault environments; insufficient for ±40V lightning or relay-coil transients in harsh industrial settings. | Choose ADG508FBRZ only when fault energy is constrained and system-level protection already exists upstream. |
Compared with MAX4508CSE+, MAX4508ESE+T extends operational reliability to -40°C to +85°C for outdoor or engine-bay deployments; compared with ADG508FBRZ, it delivers 2× higher fault voltage tolerance and 5× faster response - critical for safety-critical signal routing where failure modes must be bounded.
Availability
MAX4508ESE+T is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and redundant backup systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4508ESE+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX4508ESE+T belongs to Maxim's fault-protected analog switch family, designed specifically for high-reliability signal routing in environments prone to wiring faults, ESD, and power-supply anomalies.
FAQ
What is the maximum fault voltage the MAX4508ESE+T can withstand with power supplies turned off?
The MAX4508ESE+T withstands ±40V on its NO_ pins with V+ and V− disconnected (supplies off), per Absolute Maximum Ratings. This allows safe connection to unpowered circuits or field wiring exposed to static discharge or induced transients without damage. The device enters high-impedance mode, isolating the COM terminal from all NOx inputs during such events.
Does the MAX4508ESE+T require power-supply sequencing during startup?
No, the MAX4508ESE+T does not require power-supply sequencing. It operates safely across its full supply range (±4.5V to ±20V dual or +9V to +36V single) regardless of V+ or V− ramp order. Internal logic translators and fault comparators function correctly without defined startup sequence - eliminating design complexity in multi-rail systems.
Can the COM pin of the MAX4508ESE+T be driven beyond the supply rails?
No, the COM pin of the MAX4508ESE+T is not fault-protected. Exceeding V+ or falling below V− on COM risks forward-conducting internal ESD diodes, potentially damaging the device. The datasheet explicitly states COM must remain within V− to V+ under all conditions - unlike NO_ pins, which tolerate ±40V with supplies off.
What is the on-resistance matching between channels for the MAX4508ESE+T?
The MAX4508ESE+T guarantees ≤15Ω maximum on-resistance match (ΔRON = RON(MAX) − RON(MIN)) between any two channels under typical conditions (V+ = +15V, V− = −15V, TA = +25°C). This tight matching ensures consistent gain and offset across multiplexed sensor channels, critical for precision measurement systems.
Is the MAX4508ESE+T pin-compatible with the DG508?
Yes, the MAX4508ESE+T is explicitly designed as a pin-compatible upgrade to the industry-standard DG508. Its pinout, logic thresholds, and switching behavior match DG508, enabling direct replacement in existing layouts without PCB modification - while adding ±40V fault protection, rail-to-rail operation, and improved RON matching.
MAX4508ESE+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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX4508ESE+T FAQ
1.How can I place an order for MAX4508ESE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4508ESE+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 MAX4508ESE+T reliable?
The price and inventory of MAX4508ESE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4508ESE+T is usually 5 days.
3.What payment methods are accepted for MAX4508ESE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4508ESE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4508ESE+T?
MAX4508ESE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4508ESE+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 MAX4508ESE+T?
For technical support, including MAX4508ESE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4508ESE+T requirements.
6.How does Aetrix verify that MAX4508ESE+T is sourced from the original manufacturer or authorized distributors?
All MAX4508ESE+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 MAX4508ESE+T meets industry standards.
7.What is the process for return or replacement of MAX4508ESE+T?
All MAX4508ESE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4508ESE+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 MAX4508ESE+T part is unused and in its original packaging.
Return procedure for MAX4508ESE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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