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Analog Devices Inc./Maxim Integrated MAX4508EPE+
- Part No.:
- MAX4508EPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4508EPE+.pdf
- Description:
- IC MUX 8:1 400OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,373
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Product details
Overview
MAX4508EPE+ from Maxim Integrated is a fault-protected, high-voltage 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 MAX4508EPE+ datasheet, MAX4508EPE+ pinout, MAX4508EPE+ application, or MAX4508EPE+ equivalent, key selection criteria include fault-protection voltage margins, on-resistance matching (≤15Ω), enable timing (tON ≤ 700ns), output clamp behavior during overvoltage, and compatibility with legacy DG508 pinout in 16-pin PDIP packaging.
Technical Context
The MAX4508EPE+ uses parallel N- and P-channel FET architecture-unlike traditional triple-FET fault-protected muxes-to achieve rail-to-rail signal pass-through and low on-resistance. Its dual comparators monitor NO_ pins continuously, triggering clamping FETs (P2/N2) within 20ns when input exceeds V+ or falls below V− by ~150mV.
Fault response is asymmetric: positive faults clamp COM to V+ via P2; negative faults clamp COM to V− via N2. During fault, COM output current is sourced/sunk up to ±10mA from V+/V−, with 1kΩ clamp resistance and 2.5µs (positive) / 1.3µs (negative) recovery time dependent on load capacitance and resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports wide industrial voltage rails without external level shifting |
| On-Resistance (RON) | 400Ω max - ensures minimal signal attenuation and gain error in precision sensor/metering paths |
| On-Resistance Match | 15Ω max between channels - critical for matched gain/phase in multi-channel instrumentation |
| Fault Protection | ±40V with supplies off, ±25V with ±15V supplies - protects downstream circuitry during power loss or wiring faults |
| Enable Timing (tON/tOFF) | 700ns/400ns max (V+ = ±15V) - enables fast channel switching in real-time control loops |
| Logic Compatibility | TTL/CMOS thresholds (VA_H = +2.4V, VA_L = +0.8V) - interoperable with standard microcontrollers and FPGAs at +12V or ±15V supply |
| Rail-to-Rail Signal Range | VNO_ = (V− − 0.3V) to (V+ + 0.3V) - preserves full dynamic range of bipolar sensors and DAC outputs |
Pinout & Package
MAX4508EPE+ is housed in a 16-pin plastic DIP (P16-4) package with 0.3-inch width, lead-free finish (+ suffix), and -40°C to +85°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | A0, A1 | Address bits selecting one of eight NOx inputs; CMOS/TTL compatible, referenced to V+ and GND |
| 2 | EN | Active-high enable; all channels off when low; no power-supply sequencing required |
| 3 | V− | Negative supply rail; must be connected for dual-supply operation or tied to GND for single-supply mode |
| 4–12 | NO1–NO8 | Fault-protected analog inputs; withstand ±40V with supplies off; clamp internally during overvoltage |
| 8 | COM | Analog output common node; not fault protected - must remain within V− to V+ during normal/fault operation |
| 13 | V+ | Positive supply rail; powers internal logic and clamp FETs; absolute max 44V relative to GND |
| 14 | GND | Digital ground reference; ESD diodes connect to V+ and V−; no analog signal path connection |
| 15 | A2 | Third address bit enabling full 8-channel decode; matches DG508 pinout for drop-in replacement |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Passes signals from V− − 0.3V to V+ + 0.3V without clipping - preserves fidelity of ±10V sensor outputs |
| 20ns fault-response time | Clamps COM output within 20ns of NO_ overvoltage - prevents transient damage to ADC front-ends or op-amp inputs |
| No power-supply sequencing required | V+ and V− may be powered in any order - simplifies power-up sequencing in multi-rail industrial systems |
| All channels off with power off | NO_ pins become high-impedance open circuits when V+/V− = 0 - eliminates backfeeding or leakage into unpowered subsystems |
| Output clamped to supply rails during fault | COM is actively limited to V+ or V− during overvoltage - avoids latch-up or destruction of downstream CMOS inputs |
| 1kΩ output clamp resistance | Provides controlled current limiting (±10mA max) during fault - protects internal FETs and external loads simultaneously |
Applications
| Data-Acquisition Systems | Industrial Process Control |
|---|---|
Use Scenario: Multiplexing multiple ±10V thermocouple or strain-gauge sensor outputs into a single high-resolution ADC in a PLC rack. IC Role / Device Role / Timing Role: Fault-protected analog switch routing sensor signals while surviving field-wiring faults and ground-loop transients. Use Value: Eliminates need for external TVS diodes and series resistors per channel, reducing BOM count and board area by >30%. |
Use Scenario: Routing redundant analog setpoint and feedback signals in safety-critical valve positioners with dual 4–20mA loops. IC Role / Device Role / Timing Role: High-voltage multiplexer enabling hot-swap channel reconfiguration without powering down control electronics. Use Value: Maintains system uptime during maintenance; ±40V fault tolerance prevents spurious trips during cable disconnect/reconnect events. |
| Avionics Signal Routing | Redundant/Backup Systems |
Use Scenario: Selecting between primary and backup inertial measurement unit (IMU) analog outputs feeding flight control computers. IC Role / Device Role / Timing Role: Radiation-tolerant (per MIL-PRF-38535 QML-V qualified variants) analog switch with deterministic fault response. Use Value: 20ns fault detection ensures IMU signal integrity is preserved even during lightning-induced transients on airframe wiring. |
Use Scenario: Automatic failover between main and backup power-monitoring circuits in telecom rectifier shelves. IC Role / Device Role / Timing Role: Fault-isolated multiplexer that disconnects failed channel and routes backup signal before overvoltage propagates. Use Value: Prevents cascading failure across dual-redundant monitoring paths; enables seamless switchover without software intervention. |
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 |
|---|---|---|---|
| MAX4508CPE+ | 0°C to +70°C temperature range; identical electrical specs and pinout | Not rated for extended industrial or avionics environments requiring -40°C startup | Select MAX4508CPE+ only for commercial-grade equipment with controlled ambient conditions. |
| ADG508FBRZ | ±35V fault protection (supplies off); 500Ω max RON; SOIC-16 package only; no single-supply operation | Lacks +9V to +36V single-supply support and rail-to-rail signal handling beyond rails | Choose ADG508FBRZ when legacy SOIC footprint is mandatory and ±35V fault margin suffices. |
Compared with MAX4508CPE+, the MAX4508EPE+ adds extended temperature operation essential for outdoor or engine-bay deployments; compared with ADG508FBRZ, it delivers superior fault voltage margin, lower on-resistance, and flexible single/dual supply support - making it optimal for new industrial and aerospace designs.
Availability
MAX4508EPE+ is available at Aetrix Electronics and suitable for data-acquisition systems, industrial process control, and avionics signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4508EPE+ 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 MAX4508EPE+ belongs to Maxim's fault-protected analog switch product line, designed specifically for ruggedized signal routing in harsh environments where wiring faults, ESD, and power interruptions are common.
FAQ
What is the maximum fault voltage the MAX4508EPE+ can withstand with power supplies disconnected?
The MAX4508EPE+ withstands ±40V on its NO_ pins with V+ and V− disconnected (0V). This is specified in the Absolute Maximum Ratings table and verified under "Fault Protection" in the Electrical Characteristics section. The device enters high-impedance state on NO_ pins, preventing current flow into downstream circuitry. This capability makes MAX4508EPE+ suitable for systems where field wiring may be exposed to accidental contact with higher-voltage sources during maintenance.
Does the MAX4508EPE+ support single-supply operation, and what is the valid voltage range?
Yes, the MAX4508EPE+ supports single-supply operation with V− tied to GND and V+ ranging from +9V to +36V. This is explicitly stated in the General Description and Electrical Characteristics sections. At +12V supply, typical on-resistance is 650Ω, logic thresholds remain TTL/CMOS-compatible (VA_H = +1.8V to +2.4V), and fault protection degrades gracefully to ±25V (supplies on). Single-supply mode simplifies power design in battery-powered or 12V/24V industrial systems.
Is the MAX4508EPE+ pin-compatible with the industry-standard DG508 multiplexer?
Yes, the MAX4508EPE+ is pin-compatible with the DG508 in 16-pin PDIP packaging, as confirmed in the General Description ("pin compatible with the industry-standard DG508/DG509") and Pin Configurations diagram. Address pins A0–A2, EN, COM, NO1–NO8, V+, V−, and GND align identically. This allows direct replacement in legacy designs without PCB modification, provided the extended fault-protection and rail-to-rail features are leveraged in firmware or layout review.
What happens to the COM output during a positive overvoltage fault on an NO_ pin?
During a positive overvoltage fault (NO_ > V+ + 150mV), the MAX4508EPE+ turns off the main N1/P1 FETs and activates the P2 clamp FET, pulling COM to V+. This action limits COM voltage to the positive rail, protecting downstream components. The clamp engages within 20ns and sustains ±10mA current via 1kΩ effective resistance. Recovery to normal operation occurs in ~2.5µs after the fault clears, as documented in the Fault Protection section and Typical Operating Characteristics.
Can the MAX4508EPE+ be used with asymmetric dual supplies, such as +12V and -5V?
Yes, the MAX4508EPE+ supports asymmetric dual supplies as long as the total differential (V+ − V−) does not exceed 44V - the absolute maximum rating. For example, +12V and -5V yields 17V differential, well within limit. However, fault protection voltage is referenced to ground: maximum NO_ voltage becomes V− + 40V = +35V or V+ − 40V = -28V. The device maintains rail-to-rail signal handling relative to the actual V+ and V− rails, and logic thresholds scale accordingly per the LOGIC-LEVEL THRESHOLD vs. SUPPLY VOLTAGE plot.
MAX4508EPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX4508EPE+ FAQ
1.How can I place an order for MAX4508EPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4508EPE+ 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 MAX4508EPE+ reliable?
The price and inventory of MAX4508EPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4508EPE+ is usually 5 days.
3.What payment methods are accepted for MAX4508EPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4508EPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4508EPE+?
MAX4508EPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4508EPE+ 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 MAX4508EPE+?
For technical support, including MAX4508EPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4508EPE+ requirements.
6.How does Aetrix verify that MAX4508EPE+ is sourced from the original manufacturer or authorized distributors?
All MAX4508EPE+ 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 MAX4508EPE+ meets industry standards.
7.What is the process for return or replacement of MAX4508EPE+?
All MAX4508EPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4508EPE+, 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 MAX4508EPE+ part is unused and in its original packaging.
Return procedure for MAX4508EPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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