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Analog Devices Inc./Maxim Integrated MAX4509ESE
- Part No.:
- MAX4509ESE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4509ESE.pdf
- Description:
- IC SWITCH SP4T X 2 400OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,253
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Product details
Overview
MAX4509ESE from Maxim Integrated is a dual 4-to-1 fault-protected analog multiplexer in 16-pin narrow SO package, operating from ±4.5V to ±20V dual supplies or +9V to +36V single supply, with ±40V overvoltage protection (supplies off), 400Ω max on-resistance, and rail-to-rail signal handling - used for robust signal routing in avionics data-acquisition systems.
For engineers reviewing the MAX4509ESE datasheet, MAX4509ESE pinout, MAX4509ESE application, or MAX4509ESE equivalent, key selection criteria include fault-protection voltage thresholds, on-resistance matching across channels, enable timing (tON/tOFF), logic compatibility with TTL/CMOS, and dual 4-to-1 channel architecture versus single 8-to-1 alternatives.
Technical Context
The MAX4509ESE implements dual independent 4-to-1 multiplexers using parallel N- and P-channel FETs per switch, enabling rail-to-rail analog signal pass-through without degradation near supply rails. Its fault-protection architecture uses dedicated comparators to detect NO_ overvoltage (>±150mV beyond V+/V−) and activate clamping FETs (N2/P2) to limit COM output to V− or V+.
During fault conditions, the device isolates NO_ inputs (high-impedance), clamps COM outputs with 1kΩ typical clamp resistance, and recovers in 1.3µs (negative fault) or 2.5µs (positive fault). All digital inputs (A0, A1, EN) feature TTL-compatible thresholds (0.8V low / 2.4V high at ±15V supplies) and draw ≤1µA input current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports industrial and avionics power architectures without level-shifting. |
| On-Resistance (RON) | 400Ω max - ensures minimal signal attenuation and gain error in precision sensor or DAC output routing. |
| On-Resistance Match | 15Ω max between channels - critical for matched-gain applications like differential signal switching or calibration paths. |
| Fault Protection | ±40V with supplies off, ±25V with ±15V supplies - protects downstream circuitry during hot-swap or wiring faults. |
| Enable Timing | tON = 200ns typ, tOFF = 250ns typ (VNO_ = ±10V, RL = 1kΩ) - enables fast channel reconfiguration in real-time control loops. |
| Logic Compatibility | TTL/CMOS thresholds (VA_L = 0.8V, VA_H = 2.4V) - interoperable with FPGA I/O, microcontroller GPIO, and legacy logic without buffers. |
| Fault Response Time | 20ns clamp turn-on delay - limits transient energy injection into sensitive analog front-ends during ESD or surge events. |
Pinout & Package
MAX4509ESE is housed in a 16-pin narrow SOIC (S16-8) package, 3.9mm × 9.9mm body, 1.27mm pitch, lead-free (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | A0, A1 | Binary address inputs selecting one of four channels per mux; CMOS/TTL compatible, no external pull-ups required. |
| 2 | EN | Active-high enable controlling both muxes simultaneously; high-impedance state when low prevents signal leakage. |
| 3, 13 | V−, V+ | Analog supply rails powering internal FET switches and fault comparators; support asymmetric operation (e.g., V+ = +15V, V− = −5V). |
| 4, 7, 6, 5 | NO1A, NO4A, NO3A, NO2A | Input terminals for Mux A; fault-protected up to ±40V with supplies off - safe for unpowered system backplane connections. |
| 8, 9 | COMA, COMB | Analog outputs for each 4-to-1 section; not fault-protected - must remain within V− to V+ to avoid ESD diode conduction. |
| 10, 11, 12, 13 | NO4B, NO3B, NO2B, NO1B | Input terminals for Mux B; electrically isolated from Mux A - enables independent signal routing in redundant systems. |
| 14 | GND | Digital ground reference for logic interface; internally tied to substrate (V+) - requires careful PCB layout to avoid noise coupling into analog paths. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Passes signals from V− to V+ without clipping or distortion - essential for full-scale sensor or actuator interface in ±15V systems. |
| No power-supply sequencing required | Operates correctly regardless of V+ or V− power-up order - eliminates need for external sequencing circuits in multi-rail systems. |
| All channels off with power off | NO_ pins become high-impedance when V+/V− = 0 - prevents back-driving or loading of unpowered subsystems during maintenance. |
| Output clamped to supply during fault | COMA/COMB limited to V− or V+ via internal 1kΩ clamp resistance - avoids latch-up or damage to connected ADCs or op-amps. |
| 20ns fault-response time | Clamp activation within 20ns of overvoltage detection - meets MIL-STD-461 CS114 transient immunity requirements for avionics. |
Applications
| Avionics Signal Routing | Industrial Redundant Sensors |
|---|---|
Use Scenario: Selecting between primary and backup air-data computer outputs in flight control systems under EMI-rich environments. IC Role / Device Role / Timing Role: Dual 4-to-1 mux routes analog pitot-static or inertial sensor signals while maintaining fault isolation between channels. Use Value: ±40V fault tolerance prevents false tripping during lightning-induced transients; break-before-make timing avoids short-circuit hazards during switchover. |
Use Scenario: Monitoring dual temperature sensors in nuclear plant coolant loops, where failure of one sensor must not compromise integrity of the other. IC Role / Device Role / Timing Role: Independent Mux A and Mux B route redundant RTD or thermocouple signals to separate ADC channels. Use Value: No cross-talk (<−62dB) ensures measurement independence; matched on-resistance (≤15Ω) preserves calibration accuracy across both paths. |
| Data-Acquisition Front-End | Process Control Actuator Interface |
Use Scenario: Multiplexing 8-channel analog inputs (4 per MAX4509ESE) from strain gauges, pressure transducers, and flow meters into a shared 16-bit SAR ADC. IC Role / Device Role / Timing Role: Fault-protected analog switch front-end handling ±10V industrial signals with rail-to-rail fidelity. Use Value: 400Ω RON and <10pF off-capacitance minimize settling time and charge injection errors - critical for 100kSPS sampling. |
Use Scenario: Routing control voltages to dual solenoid valves in safety-critical hydraulic systems, where open-circuit detection is mandatory. IC Role / Device Role / Timing Role: Enabling/disabling valve drive signals via EN pin while monitoring NO_ leakage current for predictive maintenance. Use Value: ±25V fault protection with supplies on withstands inductive kickback; 200nA max COM off-leakage ensures reliable valve de-energization. |
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 |
|---|---|---|---|
| MAX4508ESE | Single 8-to-1 architecture vs. MAX4509ESE's dual 4-to-1; identical fault protection, RON, and timing specs. | Suitable for centralized signal aggregation; less flexible for independent dual-path routing. | Select MAX4508ESE when consolidating eight inputs to one output; choose MAX4509ESE for segregated A/B channel control. |
| ADG509FBRZ | ±20V max supply (vs. ±20V), ±40V fault protection, but 600Ω RON and no rail-to-rail operation - limited to mid-rail signal ranges. | Lower performance in high-precision or full-scale signal chains; lacks 20ns fault response. | Use ADG509FBRZ only in cost-sensitive, non-critical applications where ±12V signal range suffices and fault recovery time is non-critical. |
Compared with MAX4508ESE, MAX4509ESE provides independent dual-channel control ideal for redundancy schemes, while ADG509FBRZ trades rail-to-rail fidelity and speed for lower cost - making MAX4509ESE optimal for avionics and high-integrity industrial systems requiring simultaneous, isolated analog routing.
Availability
MAX4509ESE is available at Aetrix Electronics and suitable for avionics signal routing, industrial redundant sensors, data-acquisition front-ends, and process control actuator interfaces requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for MAX4509ESE 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX4509ESE belongs to Maxim's fault-protected analog switch family, engineered specifically for high-voltage signal routing in safety-critical systems where overvoltage resilience and rail-to-rail fidelity are mandatory.
FAQ
What is the maximum allowable NO_ input voltage for MAX4509ESE with supplies off?
The MAX4509ESE supports ±40V on NO_ pins with V+ = V− = 0V, verified per Absolute Maximum Ratings. This allows safe connection to live backplanes or unpowered subsystems without risk of latch-up or permanent damage. The ±40V rating applies regardless of COM load configuration when supplies are absent, making MAX4509ESE suitable for hot-swap and maintenance scenarios in field-deployed equipment.
Does MAX4509ESE require power-supply sequencing during startup?
No, MAX4509ESE does not require power-supply sequencing. Its internal logic and fault-protection comparators operate correctly whether V+ powers up before V−, after V−, or simultaneously. This eliminates external sequencing circuitry in multi-rail systems and simplifies power architecture design - a key advantage confirmed in the Applications Information section of the datasheet.
How does the fault-protection mechanism affect signal integrity during normal operation?
During normal operation (NO_ within V− to V+), MAX4509ESE exhibits no signal degradation: rail-to-rail handling preserves full dynamic range, 400Ω RON introduces negligible gain error, and <10pF off-capacitance minimizes crosstalk. The fault-protection circuitry remains transparent - only activating when NO_ exceeds rails by >150mV - ensuring uncompromised performance in compliant signal paths.
Can MAX4509ESE be used with a single +12V supply?
Yes, MAX4509ESE operates from a single +12V supply with V− connected to GND. Electrical Characteristics confirm RON = 650Ω max, tON = 220ns typ, and TTL/CMOS logic thresholds (VIN_L = 0.8V, VIN_H = 1.8V) under this condition. This configuration is validated for industrial control applications where bipolar supplies are unavailable or impractical.
What is the purpose of the GND pin in MAX4509ESE, given that analog paths are isolated from it?
The GND pin on MAX4509ESE serves exclusively as the reference for digital logic inputs (A0, A1, EN) and internal level translators - it is not connected to analog signal paths. As stated in Applications Information, "There is no connection between the analog signal paths and GND." This separation prevents digital noise from coupling into sensitive analog outputs (COMA/COMB), preserving SNR in mixed-signal systems.
MAX4509ESE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- 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, 14pF
- 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
MAX4509ESE FAQ
1.How can I place an order for MAX4509ESE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4509ESE 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 MAX4509ESE reliable?
The price and inventory of MAX4509ESE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4509ESE is usually 5 days.
3.What payment methods are accepted for MAX4509ESE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4509ESE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4509ESE?
MAX4509ESE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4509ESE 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 MAX4509ESE?
For technical support, including MAX4509ESE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4509ESE requirements.
6.How does Aetrix verify that MAX4509ESE is sourced from the original manufacturer or authorized distributors?
All MAX4509ESE 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 MAX4509ESE meets industry standards.
7.What is the process for return or replacement of MAX4509ESE?
All MAX4509ESE units undergo pre-shipment inspection (PSI). If there is an issue with MAX4509ESE, 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 MAX4509ESE part is unused and in its original packaging.
Return procedure for MAX4509ESE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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