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Analog Devices Inc./Maxim Integrated MAX4508CPE+
- Part No.:
- MAX4508CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4508CPE+.pdf
- Description:
- IC MUX 8:1 400OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,002
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Product details
Overview
MAX4508CPE+ 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 MAX4508CPE+ datasheet, MAX4508CPE+ pinout, MAX4508CPE+ application, or MAX4508CPE+ equivalent, key selection criteria include fault-protection voltage thresholds, on-resistance matching (≤15Ω), enable timing (tON ≤ 700ns), and compatibility with ±15V or +12V system rails in avionics and process control environments.
Technical Context
The MAX4508CPE+ uses parallel N- and P-channel FET architecture to achieve rail-to-rail signal conduction and low on-resistance without sacrificing fault tolerance. Its dual-comparator fault-detection circuit clamps COM output to V+ or V− within 20ns when NO_ exceeds rails by >150mV.
Unlike traditional three-FET fault-protected muxes, it avoids input voltage range reduction near rails and supports bidirectional signal flow. All digital inputs (A0–A2, EN) feature fixed TTL thresholds (VA_H = +2.4V, VA_L = +0.8V) independent of supply voltage, ensuring reliable switching across ±15V and +12V configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Single 8-to-1 analog multiplexer with address decoding (A0–A2) and enable (EN) |
| Supply Range | Dual: ±4.5V to ±20V; Single: +9V to +36V - supports legacy ±15V and modern +12V industrial rails |
| On-Resistance (RON) | 400Ω max - ensures minimal signal attenuation and thermal drift in precision sensor interfaces |
| Fault Protection | ±40V with supplies off; ±25V with ±15V supplies - protects downstream ADCs and amplifiers during power loss or surge events |
| Logic Compatibility | TTL/CMOS thresholds (VA_H ≥ +2.4V, VA_L ≤ +0.8V) - interoperable with microcontrollers and FPGA I/O without level shifters |
| Switching Speed | tON ≤ 700ns, tOFF ≤ 400ns (VNO_ = ±10V, RL = 2kΩ) - suitable for multiplexed sampling at up to ~500kHz |
| Rail-to-Rail Operation | Full signal swing from V− to V+ - preserves dynamic range in high-voltage sensor front-ends and actuator drivers |
Pinout & Package
MAX4508CPE+ is housed in a 16-pin plastic DIP (P16-4) package with through-hole mounting and 0.3" wide body. Pin 1 is A0 (LSB address), pin 8 is COM (common output), pins 4–7 and 9–12 are NO1–NO8 (normally open inputs), and pins 13 (V+), 3 (V−), 14 (GND), 2 (EN), 15 (A2), 16 (A1) provide power, control, and addressing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Binary address inputs | Select one of eight NO inputs to connect to COM; decoded internally with no external logic required |
| EN | Active-high enable | Disables all channels when low; all outputs go high-impedance - enables power-gating and system-level fault isolation |
| COM | Analog common output | Single-ended output node; not fault-protected - must remain within V− to V+ to avoid ESD diode conduction |
| NO1–NO8 | Analog input channels | Fault-protected inputs; tolerate ±40V with supplies off and clamp COM to rails during overvoltage |
| V+, V− | Power supply rails | Provide bias for analog switches and internal logic; support asymmetric operation (e.g., +15V/−5V) up to 44V total |
| GND | Digital ground reference | Reference for logic inputs only; no analog signal path connection - prevents ground-loop coupling in mixed-signal systems |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Enables full-scale analog acquisition from sensors operating at V− or V+ without clipping or headroom loss |
| 20ns fault-response time | Prevents transient overvoltage damage to downstream components such as precision op-amps or SAR ADCs |
| No power-supply sequencing required | Allows V+, V−, and logic inputs to be powered in any order - simplifies power-up sequencing in multi-rail systems |
| All channels off with power off | Guarantees high-impedance isolation between NOx and COM during brownout or shutdown - prevents back-driving |
| 1kΩ output clamp resistance during overvoltage | Limits fault current to <15mA when clamping COM to V+ or V− - compatible with standard 10kΩ load impedances |
| 400Ω max on-resistance, matched ≤15Ω | Minimizes gain error and channel-to-channel mismatch in calibrated multi-sensor measurement systems |
Applications
| Data-Acquisition Systems | Industrial Process Control |
|---|---|
Use Scenario: Multiplexing 8 thermocouple or RTD sensor signals into a single high-resolution ADC in a PLC rack. IC Role / Device Role / Timing Role: Fault-protected analog switch routing conditioned sensor outputs while rejecting field-induced transients. 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 a redundant loop controller with hot-swap capability. IC Role / Device Role / Timing Role: High-voltage multiplexer enabling seamless switchover between primary and backup control paths during maintenance. Use Value: ±40V fault tolerance maintains isolation during live insertion/removal, preventing system-wide reset or latch-up. |
| Avionics Signal Routing | Redundant/Backup Systems |
Use Scenario: Selecting among multiple air-data computer outputs (static pressure, pitot pressure) for flight-critical display units. IC Role / Device Role / Timing Role: Radiation-tolerant analog switch providing deterministic signal path selection with sub-µs fault recovery. Use Value: 2.5µs positive-fault recovery ensures uninterrupted data flow during lightning-induced transients per DO-160 Section 22. |
Use Scenario: Isolating failed sensor channels in a triple-modular-redundant (TMR) engine monitoring system. IC Role / Device Role / Timing Role: Fail-safe multiplexer that auto-disconnects faulty inputs while maintaining valid signal continuity to health-monitoring logic. Use Value: Break-before-make delay (tBBM ≥ 400ns) prevents momentary shorting between healthy and faulted channels during 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 |
|---|---|---|---|
| MAX4508CSE+ | Same electrical specs but in 16-pin narrow SOIC (S16-8); 8.7mW/°C derating vs. 10.53mW/°C for DIP | Better thermal performance in high-density layouts; requires reflow soldering instead of through-hole assembly | Select for space-constrained PCBs where automated assembly is available and thermal management is critical. |
| ADG508FBRZ | ±20V fault protection (supplies off); 220Ω typical RON; slower tON (1.2µs); no rail-to-rail input beyond rails | Limited to lower-voltage industrial systems; lacks ±40V survivability needed in avionics or utility metering | Choose only if system fault voltages are capped at ±20V and cost sensitivity outweighs robustness requirements. |
Compared with MAX4508CSE+ and ADG508FBRZ, the MAX4508CPE+ delivers superior fault resilience (±40V off-state), identical functionality in through-hole form factor, and guaranteed rail-to-rail conduction - making it optimal for repairable, high-reliability, or manually assembled systems where mechanical robustness and serviceability are prioritized.
Availability
MAX4508CPE+ is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and redundant backup systems requiring stable component supply across extended product lifecycles.
Supply support for MAX4508CPE+ 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX4508CPE+ belongs to Maxim's fault-protected analog switch family, engineered specifically for high-voltage signal routing in harsh environments where transient immunity, rail-to-rail fidelity, and fail-safe behavior are mandatory.
FAQ
What is the maximum allowable voltage on the NO_ pins of the MAX4508CPE+ when supplies are off?
The MAX4508CPE+ guarantees ±40V overvoltage protection on NO_ pins with supplies off (V+ = V− = 0). This means NO_ can safely withstand −40V to +40V relative to ground without damage or unintended conduction. Exceeding this range risks permanent ESD diode failure. The MAX4508CPE+ achieves this via internal virtual-open-circuit behavior during power loss, isolating NO_ from COM and all other terminals.
Does the MAX4508CPE+ support rail-to-rail input signals when using a +12V single supply?
Yes, the MAX4508CPE+ supports true rail-to-rail signal handling from 0V to +12V with V− tied to GND. Its parallel N/P-FET architecture allows input signals equal to V− or V+ to pass unattenuated to COM, preserving full dynamic range. This is confirmed in the "Fault-Free Analog Signal Range" specification (0V to V+ for single supply) and validated in Typical Operating Characteristics Figure 2.
What is the on-resistance matching between channels for the MAX4508CPE+?
The MAX4508CPE+ guarantees on-resistance matching of ≤15Ω between any two channels (ΔRON = RON(MAX) − RON(MIN)). At TA = +25°C with ±15V supplies, typical matching is tighter (≤10Ω). This spec ensures consistent gain and offset across multiplexed sensor channels - critical for calibration accuracy in data-acquisition systems using the MAX4508CPE+.
Can the MAX4508CPE+ be used with asymmetric dual supplies, such as +15V and −5V?
Yes, the MAX4508CPE+ supports asymmetric dual supplies as long as the absolute difference between V+ and V− does not exceed 44V (per Absolute Maximum Ratings). With +15V and −5V (20V total), the device operates fully within spec. However, fault protection limits scale accordingly: max NO_ voltage becomes V− − 40V = −45V and V+ + 40V = +55V only if supplies are off - always verify against the NO_ Input Voltage section of the datasheet for your specific configuration.
Is the COM pin fault-protected on the MAX4508CPE+?
No, the COM pin on the MAX4508CPE+ is not fault-protected. It must remain within the V− to V+ supply range at all times. Exceeding either rail forward-biases internal ESD diodes, risking latch-up or permanent damage. This is explicitly stated in the Detailed Description: "The COM_ pins are not fault protected." External clamping or limiting is required if COM connects to circuits that may violate this constraint.
MAX4508CPE+ 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:
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX4508CPE+ FAQ
1.How can I place an order for MAX4508CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4508CPE+ 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 MAX4508CPE+ reliable?
The price and inventory of MAX4508CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4508CPE+ is usually 5 days.
3.What payment methods are accepted for MAX4508CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4508CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4508CPE+?
MAX4508CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4508CPE+ 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 MAX4508CPE+?
For technical support, including MAX4508CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4508CPE+ requirements.
6.How does Aetrix verify that MAX4508CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX4508CPE+ 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 MAX4508CPE+ meets industry standards.
7.What is the process for return or replacement of MAX4508CPE+?
All MAX4508CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4508CPE+, 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 MAX4508CPE+ part is unused and in its original packaging.
Return procedure for MAX4508CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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