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Analog Devices Inc./Maxim Integrated MAX4509CSE+T
- Part No.:
- MAX4509CSE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4509CSE+T.pdf
- Description:
- IC SWITCH SP4T X 2 400OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,036
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Product details
Overview
MAX4509CSE+T from Maxim Integrated is a dual 4-to-1 fault-protected analog multiplexer with ±40V overvoltage protection (supplies off), 400Ω max on-resistance, and rail-to-rail signal handling across ±4.5V to ±20V dual supplies or +9V to +36V single supply. It features TTL/CMOS-compatible logic inputs, 20ns fault-response time, and output clamping during overvoltage events - deployed in avionics signal routing and industrial redundant systems.
For engineers reviewing the MAX4509CSE+T datasheet, MAX4509CSE+T pinout, MAX4509CSE+T application, or MAX4509CSE+T equivalent, this page delivers verified electrical specs, fault-protection behavior under ±25V/±40V conditions, dual-channel switching timing (tON/tOFF ≤ 700ns), COMA/COMB output clamp resistance (1kΩ), and real-world use cases in data-acquisition and backup-system architectures.
Technical Context
The MAX4509CSE+T implements a parallel N-channel/P-channel FET switch architecture per channel, enabling rail-to-rail conduction without signal degradation near supply rails. Its dual-comparator fault-detection circuitry monitors NOx pins continuously against V+ and V−, triggering sub-20ns shutdown and output clamping via booster FETs when input exceeds rails by >150mV.
Unlike traditional three-FET fault-protected muxes, it avoids 3V rail margin loss and supports bidirectional signal flow. Fault recovery is asymmetric: +2.5µs for positive faults, +1.3µs for negative faults - dependent on COM output RC load, not fault amplitude.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | Dual ±4.5V to ±20V or single +9V to +36V - enables operation in high-voltage industrial and avionics rails without level-shifting. |
| On-Resistance (RON) | 400Ω max - ensures minimal insertion loss and voltage drop in precision signal paths up to ±15V. |
| Fault Protection | ±40V with supplies off, ±25V with ±15V supplies - protects downstream circuitry during power-loss transients or sensor overvoltage. |
| Fault Response Time | 20ns - limits fault energy transfer before clamping activates, critical for protecting sensitive ADC front-ends. |
| Logic Compatibility | TTL/CMOS thresholds (VA_H = +2.4V, VA_L = +0.8V at +12V supply) - allows direct interface with microcontrollers and FPGA I/O without buffers. |
| Charge Injection | ±70pC - low enough to minimize settling error in sample-and-hold circuits operating at ≤100kHz. |
| Off-Isolation | -62dB at 1MHz - suppresses crosstalk between inactive channels in multi-sensor monitoring systems. |
Pinout & Package
MAX4509CSE+T uses a 16-pin narrow SOIC (S16-8) package, 3.9mm × 9.9mm body, 1.27mm pitch, lead-free (RoHS-compliant). Pin 1 is A0; pin 16 is A1. GND (pin 15) and V+ (pin 14) are adjacent to support low-inductance decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | Address Inputs | Select one of four inputs per mux (COMA/COMB); CMOS/TTL compatible, no external pull-ups required. |
| EN | Enable Input | Active-high control: disables both muxes simultaneously, forcing all NOx pins high-Z and COM outputs clamped only during faults. |
| COMA, COMB | Analog Outputs | Non-fault-protected outputs - must remain within V− to V+; exceeding rails risks ESD diode conduction and damage. |
| NO1A–NO4A, NO1B–NO4B | Analog Inputs | Fault-protected channels - tolerate ±40V with supplies off; clamp COM to V+/V− during overvoltage. |
| V+, V− | Power Supplies | Support asymmetric rails (e.g., +15V/−5V); sum must not exceed 44V absolute max; internal logic and gate drivers reference these. |
| GND | Logic Ground | Reference for digital inputs only; no analog signal path connection - isolates logic noise from analog sections. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Passes signals from V− to V+ without attenuation or distortion - eliminates dynamic range loss in ±15V sensor interfaces. |
| No power-supply sequencing required | V+, V−, and logic inputs can be powered in any order - simplifies system power-up design and avoids latch-up risk. |
| All channels off with power off | NOx pins become virtual open-circuits when V+/V− = 0 - prevents back-driving or leakage into unpowered subsystems. |
| Output clamped to supply during fault | COMA/COMB limited to V+ or V− (not ground) during overvoltage - preserves downstream bias points in active circuits. |
| 1kΩ output clamp resistance during overvoltage | Controls fault current to ≤15mA at ±15V rails - meets IEC 61000-4-5 surge immunity requirements for protected nodes. |
Applications
| Avionics Signal Routing | Industrial Redundant Systems |
|---|---|
Use Scenario: Selecting between primary and backup flight-control sensor signals in real time under EMI-heavy cockpit environments. IC Role / Device Role / Timing Role: Dual 4-to-1 mux routes analog position/voltage feedback from gyros, accelerometers, and pitot tubes to central processing units. Use Value: ±40V fault tolerance prevents latch-up during lightning-induced transients; 20ns response ensures signal integrity during rapid failover. |
Use Scenario: Cross-connecting redundant PLC I/O modules to maintain process continuity during module replacement or failure. IC Role / Device Role / Timing Role: Isolates and selects between duplicate analog input channels (4–20mA, ±10V) before digitization. Use Value: Rail-to-rail operation preserves full sensor span; output clamping prevents damage to ADC inputs during hot-swap events. |
| Data-Acquisition Front-End | Process Control Signal Multiplexing |
Use Scenario: Scanning multiple high-voltage thermocouple or strain-gauge bridges into a single precision ADC in test equipment. IC Role / Device Role / Timing Role: Fault-protected analog switch array routes differential sensor outputs while rejecting common-mode surges. Use Value: 400Ω RON and <15Ω channel matching minimize gain error; -62dB off-isolation prevents crosstalk between 16-channel scans. |
Use Scenario: Consolidating analog outputs from distributed temperature, pressure, and flow controllers onto shared HART or 4–20mA fieldbus lines. IC Role / Device Role / Timing Role: Bidirectional mux handles both sensor readback and actuator command injection in loop diagnostics. Use Value: ±25V fault protection withstands induced transients on long plant wiring; TTL-compatible EN allows PLC-controlled channel arbitration. |
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 (+10.8V to +16.5V); ±40V fault protection; 450Ω RON; no rail-to-rail signal pass-through - clamps at VDD–3V/VSS+3V. | Limited to mid-range industrial systems without bipolar rails; unsuitable for avionics or ±15V instrumentation. | Choose ADG509FBRZ only if supply is strictly single-rail and fault clamping within 3V of rails is acceptable. |
| TMUX6209PWR | Lower voltage range (±5V to ±18V); 3.5Ω RON; ±60V fault protection; requires external charge-pump for rail-to-rail; no integrated clamp FETs. | Better for low-RON precision apps but adds BOM cost/complexity; lacks autonomous clamp action - needs external circuitry for safe fault limiting. | Select TMUX6209PWR when ultra-low on-resistance is critical and system-level fault management is already implemented. |
Compared with ADG509FBRZ and TMUX6209PWR, MAX4509CSE+T uniquely combines bipolar/singlesupply flexibility, true rail-to-rail conduction, autonomous ±40V fault response, and integrated output clamping - making it optimal for safety-critical, mixed-rail embedded systems where layout simplicity and guaranteed fault containment are mandatory.
Availability
MAX4509CSE+T is available at Aetrix Electronics and suitable for avionics signal routing, industrial redundant systems, and data-acquisition front-ends requiring stable component supply, long-term lifecycle support, and traceable sourcing for DO-254 and IEC 61508 compliance programs.
Supply support for MAX4509CSE+T 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+T belongs to Maxim's fault-protected analog switch family, engineered specifically for high-reliability signal routing in environments prone to overvoltage transients, power interruptions, and EMI - targeting aerospace, process control, and test equipment.
FAQ
What is the maximum fault voltage the MAX4509CSE+T tolerates with power supplies turned off?
The MAX4509CSE+T tolerates ±40V on its NO1A–NO4B pins with V+ = V− = 0V. This is achieved via internal high-impedance isolation that renders the NOx terminals virtual open circuits during power-off faults. The specification is validated per Absolute Maximum Ratings table and applies regardless of COMA/COMB load configuration, making MAX4509CSE+T suitable for systems requiring fail-safe behavior during brownouts or maintenance disconnects.
Does the MAX4509CSE+T support rail-to-rail signal transmission when powered from ±15V supplies?
Yes, the MAX4509CSE+T supports true rail-to-rail signal transmission from V− to V+ under ±15V dual-supply operation. Unlike conventional fault-protected muxes that lose up to 3V of dynamic range near the rails, its parallel N/P-FET architecture passes signals across the full ±15V span without attenuation or distortion - confirmed by Typical Operating Characteristics plots (Figure MAX4508/09toc01 and toc03) and explicitly stated in the Detailed Description section.
Can the COMA and COMB pins of the MAX4509CSE+T be overvolted safely?
No, the COMA and COMB pins of the MAX4509CSE+T are not fault-protected. Exceeding V+ or falling below V− on either COM pin forward-biases internal ESD diodes, risking permanent damage. Absolute Maximum Ratings specify COM voltage limits as (V+ + 0.3V) to (V− − 0.3V). Therefore, external clamping or series current-limiting resistors must be used if COM nodes connect to potentially overvolted loads - a key design constraint explicitly called out in the datasheet's "COM and A_" subsection.
What is the enable propagation delay (tON/tOFF) for the MAX4509CSE+T at ±15V supplies?
At ±15V dual supplies, the MAX4509CSE+T exhibits typical enable turn-on time (tON) of 200ns and turn-off time (tOFF) of 250ns, with maximum values of 700ns and 400ns respectively (per Electrical Characteristics table, "Switch Dynamic Characteristics"). These values are measured with RL = 1kΩ and apply to both COMA and COMB outputs simultaneously - critical for synchronized channel switching in time-critical redundancy schemes.
Is the MAX4509CSE+T pin-compatible with industry-standard DG509 multiplexers?
Yes, the MAX4509CSE+T is explicitly designed as a pin-compatible upgrade to the DG509. The datasheet states "pin compatible with the industry-standard DG509", and the pin configurations (top-view diagrams) confirm identical pin 1 (A0) through pin 16 (A1) mapping for the 16-pin SOIC package. However, MAX4509CSE+T adds fault protection, rail-to-rail operation, and lower on-resistance - delivering enhanced robustness without PCB redesign.
MAX4509CSE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX4509CSE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4509CSE+T 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+T reliable?
The price and inventory of MAX4509CSE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4509CSE+T is usually 5 days.
3.What payment methods are accepted for MAX4509CSE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4509CSE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4509CSE+T?
MAX4509CSE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4509CSE+T 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+T?
For technical support, including MAX4509CSE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4509CSE+T requirements.
6.How does Aetrix verify that MAX4509CSE+T is sourced from the original manufacturer or authorized distributors?
All MAX4509CSE+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX4509CSE+T?
All MAX4509CSE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4509CSE+T, 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+T part is unused and in its original packaging.
Return procedure for MAX4509CSE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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