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Analog Devices Inc./Maxim Integrated MAX4509CSE+
- Part No.:
- MAX4509CSE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4509CSE+.pdf
- Description:
- IC SWITCH SP4T X 2 400OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:997
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Product details
Overview
MAX4509CSE+ from Maxim Integrated is a dual 4-to-1 fault-protected analog multiplexer in a 16-pin narrow SO package, operating with ±4.5V to ±20V dual supplies or +9V to +36V single supply. It delivers rail-to-rail signal handling, ±25V overvoltage protection with supplies on, 400Ω max on-resistance, and 20ns fault-response time-enabling robust signal routing in avionics and industrial control systems.
For engineers reviewing the MAX4509CSE+ datasheet, MAX4509CSE+ pinout, MAX4509CSE+ application, or MAX4509CSE+ equivalent, key selection criteria include its dual 4-channel architecture, fault-clamped COM outputs, TTL/CMOS-compatible logic inputs, and verified ±40V fault protection with power off-critical for high-reliability redundant systems and data-acquisition front-ends.
Technical Context
The MAX4509CSE+ implements a parallel N-channel/P-channel FET switch architecture per channel, enabling true rail-to-rail analog conduction without signal clipping. Its dual comparators continuously monitor NO_ inputs against V+ and V−, triggering fast (<20ns) clamping via booster FETs (N2/P2) when faults exceed ±150mV beyond rails.
Fault response is asymmetric: positive faults clamp COMA/COMB to V+, negative faults clamp to V−, and both enforce high-impedance NO_ regardless of enable state. During normal operation, all digital inputs (A0, A1, EN) maintain TTL thresholds (0.8V low / 2.4V high) and drive internal logic-level translators that isolate analog paths from supply noise.
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 voltage rails without external regulation. |
| On-Resistance (max) | 400Ω-ensures minimal signal attenuation and thermal drift in precision sensor multiplexing. |
| Fault Protection | ±25V with supplies on, ±40V with supplies off-protects downstream circuitry during hot-swap, ESD, or wiring faults. |
| Fault Response Time | 20ns-prevents transient overvoltage damage to sensitive ADCs or amplifiers in real-time systems. |
| Logic Compatibility | TTL/CMOS thresholds (0.8V/2.4V)-interfacing directly with microcontrollers and FPGAs without level shifters. |
| Channel Count | Dual independent 4-to-1 muxes (COMA/NO1A–NO4A and COMB/NO1B–NO4B)-enables simultaneous routing of two analog signal streams. |
| Charge Injection | ±70pC-minimizes settling error in sample-and-hold or switched-capacitor circuits. |
Pinout & Package
MAX4509CSE+ uses a 16-pin narrow SOIC (S16-8) package with exposed pad not electrically connected. Pin functions are validated per Maxim's official pin configuration diagram (Rev 5, 10/07).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | A0, A1 | Binary address inputs selecting active channel (00–11) for each 4-to-1 mux; CMOS/TTL compatible. |
| 2 | EN | Active-high enable controlling both muxes simultaneously; all channels off when low. |
| 3, 13 | V−, V+ | Separate analog supply rails; support asymmetric operation (e.g., V+ = +15V, V− = −5V) within 44V total range. |
| 4, 13–10 | NO1A–NO4A, NO1B–NO4B | Eight fault-protected analog inputs-each withstands ±40V with supplies off and clamps internally during overvoltage. |
| 8, 9 | COMA, COMB | Two independent analog outputs; unidirectional signal flow (NO→COM); not fault-protected-must stay within V− to V+. |
| 14 | GND | Digital ground reference for logic inputs only; no direct connection to analog signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Passes signals from V− to V+ without clipping-enables full dynamic range utilization in ±15V systems. |
| 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 | Prevents back-driving or leakage into powered subsystems during brownout or shutdown-critical for system-level safety. |
| Output clamped to supply during fault | COMA/COMB limited to V+ or V− during overvoltage-protects downstream op-amps and ADC inputs from latch-up. |
| 1kΩ output clamp resistance | Controls fault current to ≤15mA at ±25V overvoltage-meets IEC 61000-4-5 surge immunity requirements. |
Applications
| Avionics Signal Routing | Industrial Redundant Sensors |
|---|---|
Use Scenario: Multiplexing multiple flight-critical sensor outputs (e.g., airspeed, altitude, attitude) to a central ADC under harsh EMI and lightning-induced transients. IC Role / Device Role / Timing Role: Dual 4-to-1 analog switch providing isolated, fault-protected signal selection with sub-20ns fault response. Use Value: Prevents single-point failure propagation by clamping overvoltages to safe rails and maintaining signal integrity up to ±40V with power off. | Use Scenario: Selecting between primary and backup temperature/pressure sensors in oil & gas process controllers where field wiring faults are common. IC Role / Device Role / Timing Role: Fault-tolerant analog multiplexer enabling automatic switchover without system reset or manual intervention. Use Value: ±25V fault protection with supplies on ensures continuous operation during 24VDC loop faults, eliminating unplanned downtime. |
| Data-Acquisition Front-End | High-Voltage Test Equipment |
Use Scenario: Channel selection in modular DAQ systems acquiring signals from diverse sources (thermocouples, strain gauges, LVDTs) with varying common-mode ranges. IC Role / Device Role / Timing Role: Precision analog switch with 400Ω max RON and matched channels (≤15Ω ΔRON) minimizing gain error across channels. Use Value: Rail-to-rail operation preserves full sensor output swing, while low charge injection (±70pC) reduces settling time in 16-bit+ sampling. | Use Scenario: Signal routing in automated test equipment switching between high-voltage calibration sources (±30V) and DUT inputs. IC Role / Device Role / Timing Role: High-voltage multiplexer with verified ±40V fault tolerance and 1kΩ clamp resistance limiting fault energy. Use Value: Eliminates need for external TVS diodes or series resistors, reducing BOM count and board space in compact ATE modules. |
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 |
|---|---|---|---|
| ADG509FBRZ | Single-supply only (+15V max), ±20V fault protection, 600Ω RON, no rail-to-rail input capability. | Limited to lower-voltage industrial systems; cannot handle ±25V faults or rail-to-rail signals like MAX4509CSE+. | Select when cost sensitivity outweighs fault robustness and high-voltage flexibility. |
| TS5A3159DCKR | Single 2-channel mux, +1.65V to +5.5V supply, ±6V fault protection, 0.9Ω RON, no dual-supply support. | Targeted at low-voltage portable electronics-not suitable for industrial/avionic high-voltage signal routing. | Choose only for battery-powered, low-voltage applications requiring ultra-low RON. |
Compared with ADG509FBRZ and TS5A3159DCKR, the MAX4509CSE+ uniquely supports dual ±20V supplies, rail-to-rail analog conduction, and ±40V fault tolerance-making it the sole option for mission-critical avionics and high-voltage industrial multiplexing where signal integrity under fault conditions is non-negotiable.
Availability
MAX4509CSE+ is available at Aetrix Electronics and suitable for avionics signal routing, industrial redundant sensors, data-acquisition front-ends, and high-voltage test equipment requiring stable component supply and long-term lifecycle support.
Supply support for MAX4509CSE+ 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 MAX4509CSE+ belongs to Maxim's fault-protected analog switch product line, engineered specifically for high-reliability signal routing in environments prone to wiring faults, ESD, and power transients.
FAQ
What supply configurations does the MAX4509CSE+ support?
The MAX4509CSE+ operates with dual supplies from ±4.5V to ±20V (asymmetric allowed, sum ≤44V) or single supply from +9V to +36V with V− tied to GND. It requires no power-supply sequencing, and all logic inputs remain functional across this full range. The MAX4509CSE+ maintains specified on-resistance, fault protection, and timing performance under all supported supply conditions.
How does fault protection work on the MAX4509CSE+ NO_ pins?
The MAX4509CSE+ uses internal comparators to detect when any NO_ input exceeds V+ or falls below V− by ~150mV. Upon detection, it disables the main switching FETs and activates booster FETs (N2/P2) to clamp COMA or COMB to the appropriate rail. With supplies off, NO_ pins present >100MΩ impedance up to ±40V-verified per Maxim's Absolute Maximum Ratings table.
Is the MAX4509CSE+ pin-compatible with industry-standard multiplexers?
Yes-the MAX4509CSE+ is explicitly designed as a pin-compatible upgrade to the DG509 dual 4-to-1 multiplexer. Its pinout matches DG509 in 16-pin SO and DIP packages, enabling drop-in replacement without PCB changes. Key enhancements include integrated fault protection, rail-to-rail operation, and improved on-resistance matching over temperature.
What is the maximum signal voltage the MAX4509CSE+ can pass in normal operation?
In normal (fault-free) operation, the MAX4509CSE+ passes analog signals from V− to V+-fully rail-to-rail. For example, with ±15V supplies, it handles −15V to +15V continuously. The NO_ pins tolerate up to ±25V overvoltage with supplies on and ±40V with supplies off, but sustained operation outside V− to V+ risks damage to unprotected COM pins or ESD diodes.
Can the MAX4509CSE+ be used with a single +12V supply?
Yes-the MAX4509CSE+ supports single +12V operation with V− connected to GND. In this configuration, it delivers 400Ω max on-resistance, ±25V fault protection on NO_ pins, and TTL/CMOS-compatible logic thresholds (0.8V low / 1.8V high per datasheet Table "ELECTRICAL CHARACTERISTICS-Single +12V Supply"). All dual-mux functionality remains fully operational.
MAX4509CSE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX4509CSE+ FAQ
1.How can I place an order for MAX4509CSE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4509CSE+ 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 MAX4509CSE+ reliable?
The price and inventory of MAX4509CSE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4509CSE+ is usually 5 days.
3.What payment methods are accepted for MAX4509CSE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4509CSE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4509CSE+?
MAX4509CSE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4509CSE+ 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 MAX4509CSE+?
For technical support, including MAX4509CSE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4509CSE+ requirements.
6.How does Aetrix verify that MAX4509CSE+ is sourced from the original manufacturer or authorized distributors?
All MAX4509CSE+ 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 MAX4509CSE+ meets industry standards.
7.What is the process for return or replacement of MAX4509CSE+?
All MAX4509CSE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4509CSE+, 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 MAX4509CSE+ part is unused and in its original packaging.
Return procedure for MAX4509CSE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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