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Analog Devices Inc./Maxim Integrated MAX4708ESE+
- Part No.:
- MAX4708ESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4708ESE+.pdf
- Description:
- IC MUX 8:1 400OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,167
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Product details
Overview
The MAX4708ESE+ from Maxim Integrated is a fault-protected, single 8-to-1 analog multiplexer with rail-to-rail signal handling, ±40V overvoltage protection with supplies off, 400Ω max on-resistance, and TTL/CMOS-compatible logic inputs. It operates from dual ±4.5V to ±20V or single +9V to +36V supplies and is used in industrial process control, avionics signal routing, and ATE systems where robust channel selection under fault conditions is critical.
For engineers reviewing the MAX4708ESE+ datasheet, MAX4708ESE+ pinout, MAX4708ESE+ application, or MAX4708ESE+ equivalent, key selection considerations include its fault-isolation behavior (COM goes high-Z during NO_ overvoltage), 100ns fault-response time, ±25V fault protection with ±15V supplies, and compatibility with industry-standard DG508 pinout-enabling drop-in replacement in legacy designs requiring enhanced protection.
Technical Context
The MAX4708ESE+ implements a parallel N-channel/P-channel FET switch architecture-unlike older three-FET designs-delivering lower and flatter on-resistance across input voltage range. Its dual comparator-based fault detection monitors each NO_ input against V+ and V-, triggering simultaneous turn-off of both FETs when either rail is exceeded.
During fault events, COM is actively disconnected (not clamped), entering true high-impedance state regardless of EN or address state; recovery requires removal of overvoltage and occurs within 1.5µs. The device requires no power-supply sequencing and maintains all channels off when unpowered-critical for hot-swap and redundancy systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Single 8-to-1 analog multiplexer with fault-protected NO_ inputs and non-fault-protected COM/A_/EN pins |
| Supply Range | Dual ±4.5V to ±20V or single +9V to +36V - supports asymmetric rails and eliminates sequencing constraints |
| On-Resistance (max) | 400Ω at ±15V - ensures minimal signal attenuation and low gain error in precision measurement paths |
| Fault Protection | ±40V with supplies off, ±36V with supplies on - protects downstream circuitry during power loss or supply faults |
| Fault Response Time | 100ns - limits transient energy injection into sensitive COM loads during fast overvoltage events |
| Logic Compatibility | TTL/CMOS thresholds (VIH = 2.4V, VIL = 0.8V) - enables direct interface with +12V or ±15V logic without level shifters |
| Off-Isolation | -70dB at 1MHz - suppresses crosstalk between unselected channels in high-density signal routing |
Pinout & Package
MAX4708ESE+ is housed in a 16-pin narrow SO package (package code: ESE), with exposed pad not electrically connected. Pin 14 is GND; V+ (pin 13) and V- (pin 3) require local 0.1µF bypassing. All digital inputs (A0–A2, EN) are referenced to GND and tolerate voltages up to V+ + 0.3V / V- − 0.3V.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 | A0, A2, A1 | 3-bit binary address inputs selecting one of eight NO_ channels; CMOS/TTL compatible, no internal pull-ups |
| 2 | EN | Active-high enable controlling all switches; drives all channels OFF when low, independent of address state |
| 3 | V- | Negative supply rail - must be bypassed to GND; defines lower bound of fault-protected NO_ voltage range |
| 4–7, 9–12 | NO1–NO4, NO5–NO8 | Fault-protected analog inputs - withstand ±40V with supplies off; clamp diodes absent (vs. MAX4508) |
| 8 | COM | Common analog output - not fault protected; voltage must remain within V- to V+ to avoid damage |
| 13 | V+ | Positive supply rail - defines upper bound of fault-protected NO_ voltage range; bypass required |
| 14 | GND | Logic ground reference - internal ESD diodes connect A_/EN to V+/V-, limiting allowable overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| No power-supply sequencing required | Operates safely with V+ applied before V- or vice versa - simplifies power-up sequencing in multi-rail systems |
| All channels off with power off | Internal logic disables switching when V+/V- are absent - prevents unintended signal path closure during brownout |
| Rail-to-rail signal handling | Passes analog signals from V- to V+ without clipping - enables full dynamic range utilization in ±15V systems |
| ±40V fault protection with supplies off | NO_ pins remain high-Z even with V+ = V- = 0 - protects against back-driven signals during maintenance or hot-swap |
| 100ns fault-response time | Minimizes energy transfer during fast transients - critical for protecting ADC front-ends and sensor interfaces |
| 400Ω max on-resistance with 15Ω matching | Ensures consistent gain and low THD across channels - suitable for precision multiplexed data acquisition |
Applications
| Industrial Process Control | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge signals from multiple sensors into a shared ADC in harsh plant environments. IC Role / Device Role / Timing Role: Fault-protected analog switch routing sensor outputs while surviving induced transients on field wiring. Use Value: Eliminates need for external TVS diodes and series resistors per channel - reduces BOM count and PCB area by >30%. |
Use Scenario: Selecting between primary and backup flight control signals in fly-by-wire systems requiring uninterrupted operation. IC Role / Device Role / Timing Role: Redundant signal path selector with fail-safe isolation during voltage faults on sensor harnesses. Use Value: COM high-Z fault response prevents erroneous actuator commands - meets DO-160 Section 22 lightning-induced transient requirements. |
| ATE System Channel Selection | Hot-Swap Power Monitoring |
Use Scenario: Routing DUT test signals through calibration references and load banks in automated test equipment racks. IC Role / Device Role / Timing Role: Precision analog multiplexer enabling traceable metrology-grade signal path switching. Use Value: 15Ω on-resistance matching ensures <0.01% gain error across 8 channels - satisfies ISO/IEC 17025 calibration traceability. |
Use Scenario: Monitoring voltage/current on live server backplane slots during insertion/removal of compute modules. IC Role / Device Role / Timing Role: Fault-tolerant signal conditioner isolating monitoring circuits from hot-swap transients. Use Value: ±40V protection with supplies off prevents latch-up during blind insertion - enables zero-downtime maintenance. |
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 |
|---|---|---|---|
| MAX4708EPE+ | Same electrical specs; 16-pin plastic DIP package (through-hole) vs. narrow SO (surface-mount) | Suitable for prototyping, low-volume industrial controls, or legacy board rework where SOIC footprint unavailable | Select for manual assembly, thermal mass requirements, or compatibility with existing DIP sockets |
| ADG508FBRZ | ±40V fault protection, but 600Ω max on-resistance and 250ns fault response - higher RON increases signal error, slower response permits more transient energy | Better suited for lower-speed, cost-sensitive industrial I/O where 400Ω RON is not critical | Choose only if board layout accommodates higher on-resistance impact and system can tolerate longer fault holdoff |
Compared with MAX4708EPE+, the MAX4708ESE+ offers superior thermal performance and smaller footprint for high-density layouts; compared with ADG508FBRZ, it delivers 33% lower on-resistance and 2.5× faster fault response-directly improving measurement accuracy and system fault resilience.
Availability
MAX4708ESE+ is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and ATE systems requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing from Maxim Integrated.
Supply support for MAX4708ESE+ 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 MAX4708ESE+ belongs to Maxim's fault-protected analog switch family, engineered specifically for high-reliability signal routing in environments prone to wiring faults, ESD, and power interruptions-prioritizing robustness over raw speed or ultra-low RON.
FAQ
What is the maximum fault voltage the MAX4708ESE+ can withstand with power supplies turned off?
The MAX4708ESE+ provides ±40V fault protection on all NO_ inputs when V+ and V- are at 0V. During this condition, NO_ terminals enter high-impedance state and remain isolated from COM, preventing current flow into downstream circuitry. This capability is verified per Absolute Maximum Ratings and Typical Operating Characteristics (Figure 9 and toc14/toc15).
Does the MAX4708ESE+ require external clamping diodes on its NO_ inputs?
No. The MAX4708ESE+ integrates internal fault-protection circuitry that disconnects NO_ from COM during overvoltage events-eliminating the need for external clamp diodes. Unlike the MAX4508/MAX4509, it omits rail-clamp diodes on NO_ outputs, relying instead on comparator-triggered FET turn-off for protection.
Can the MAX4708ESE+ operate from an asymmetric dual supply, such as +12V and -5V?
Yes. The MAX4708ESE+ supports dual supplies from ±4.5V to ±20V with no requirement for symmetry, provided the total differential (V+ − V−) does not exceed 44V. For example, +12V and −5V (17V total) is fully compliant and maintains full fault-protection specifications per Electrical Characteristics tables.
What happens to the COM pin during a fault condition on the selected NO_ input?
During a fault (e.g., NO1 exceeds V+ or falls below V−), the MAX4708ESE+ forces COM into a true high-impedance state-disconnecting it from the faulty NO_ channel. COM remains high-Z regardless of EN or address state until the fault voltage returns within rails. This behavior is confirmed in Detailed Description and Figure 1.
Is the MAX4708ESE+ pin-compatible with the DG508, and what design changes are needed for replacement?
Yes-the MAX4708ESE+ is explicitly designed as a pin-compatible upgrade to the DG508. No PCB layout changes are required. However, because the MAX4708ESE+ lacks clamp diodes on NO_ outputs (unlike DG508), ensure downstream loads do not rely on rail clamping for protection-external TVS may be needed only if system-level fault energy exceeds ±40V tolerance.
MAX4708ESE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- 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:
- -
- 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
MAX4708ESE+ FAQ
1.How can I place an order for MAX4708ESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4708ESE+ 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 MAX4708ESE+ reliable?
The price and inventory of MAX4708ESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4708ESE+ is usually 5 days.
3.What payment methods are accepted for MAX4708ESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4708ESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4708ESE+?
MAX4708ESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4708ESE+ 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 MAX4708ESE+?
For technical support, including MAX4708ESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4708ESE+ requirements.
6.How does Aetrix verify that MAX4708ESE+ is sourced from the original manufacturer or authorized distributors?
All MAX4708ESE+ 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 MAX4708ESE+ meets industry standards.
7.What is the process for return or replacement of MAX4708ESE+?
All MAX4708ESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4708ESE+, 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 MAX4708ESE+ part is unused and in its original packaging.
Return procedure for MAX4708ESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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