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Analog Devices Inc./Maxim Integrated MAX4509CPE+
- Part No.:
- MAX4509CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4509CPE+.pdf
- Description:
- IC SWITCH SP4T X 2 400OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,589
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Product details
Overview
MAX4509CPE+ from Maxim Integrated is a dual 4-to-1 fault-protected analog multiplexer in a 16-pin plastic DIP package, operating with ±4.5V to ±20V dual supplies or +9V to +36V single supply. It delivers rail-to-rail signal handling, ±40V overvoltage protection with supplies off, 400Ω max on-resistance, and 20ns fault-response time-enabling robust signal routing in industrial data-acquisition systems where input faults up to ±25V occur during powered operation.
For engineers reviewing the MAX4509CPE+ datasheet, MAX4509CPE+ pinout, MAX4509CPE+ application, or MAX4509CPE+ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to the C-grade 0°C to +70°C temperature range and P16-4 package.
Technical Context
The MAX4509CPE+ implements a dual independent 4-to-1 multiplexer architecture using parallel N- and P-channel FETs per channel-enabling true rail-to-rail analog signal pass-through without voltage headroom loss. Its fault protection relies on dedicated comparators monitoring each NO_ input against V+ and V−, triggering clamp FETs (N2/P2) within 20ns when signals exceed rails by >150mV.
During fault conditions, the device maintains high-impedance NO_ terminals and clamps COMA/COMB outputs to V+ or V− via internal booster FETs capable of ±10mA sourcing/sinking. Digital inputs (A0, A1, EN) feature TTL/CMOS-compatible thresholds (0.8V low / 2.4V high at ±15V), eliminating power-supply sequencing requirements and supporting direct interface with +12V logic.
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 regulators. |
| On-Resistance | 400Ω max-ensures minimal signal attenuation and gain error in precision sensor front-ends. |
| Fault Protection | ±40V with supplies off, ±25V with ±15V supplies-protects downstream circuitry during hot-swap or wiring faults. |
| Fault Response Time | 20ns-prevents transient overvoltage damage to connected ADCs or amplifiers. |
| Rail-to-Rail Handling | Full signal swing from V− to V+-enables use with bipolar op-amps and ±10V industrial sensors without level-shifting. |
| Logic Compatibility | TTL/CMOS thresholds (0.8V/2.4V)-allows direct connection to microcontrollers and FPGAs running at +12V or ±15V. |
| Channel Matching | 15Ω max RON mismatch-reduces gain error in differential or ratiometric measurement paths. |
Pinout & Package
MAX4509CPE+ uses a 16-pin plastic DIP (P16-4) package with 0.300" width and through-hole mounting. Pin functions are validated per Maxim's official datasheet revision 5 (10/07).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | A0, A1 | Address bits selecting active channel (0–3) per mux; CMOS/TTL compatible with 0.8V/2.4V thresholds. |
| 2 | EN | Active-high enable controlling both muxes simultaneously; disables all channels when low. |
| 3, 14 | V−, V+ | Analog supply rails powering FET switches and fault comparators; support asymmetric operation. |
| 4, 13 | NO1A, NO1B | Input 1 for Mux A and Mux B; fault-protected-clamped and isolated during overvoltage events. |
| 5–7, 10–12 | NO2A–NO4A, NO2B–NO4B | Additional fault-protected analog inputs per mux; identical electrical behavior to NO1A/B. |
| 8, 9 | COMA, COMB | Outputs for Mux A and Mux B; not fault-protected-must remain within V− to V+ during normal/fault operation. |
| 15 | GND | Digital ground reference for logic circuitry and ESD diodes; isolated from analog signal path. |
Key Features
| Feature | Design Value |
|---|---|
| ±40V fault protection with supplies off | Enables safe hot-plug insertion in powered-backplane systems without risk of latch-up or permanent damage. |
| Rail-to-rail signal handling | Preserves full dynamic range of ±10V industrial sensors and DAC outputs without external biasing. |
| No power-supply sequencing required | Simplifies system startup by allowing V+, V−, and logic supplies to ramp independently. |
| All channels off with power off | Prevents back-driving or leakage current into unpowered subsystems during maintenance or shutdown. |
| Output clamped to supply during fault | Limits COMA/COMB voltage to safe levels (V+ or V−), protecting connected ADC reference inputs or op-amp rails. |
| 1kΩ output clamp resistance during overvoltage | Provides controlled current limiting (±10mA max) to avoid exceeding absolute maximum ratings under fault. |
Applications
| Industrial Data-Acquisition Systems | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing multiple ±10V sensor outputs (thermocouples, strain gauges) into a single high-resolution ADC in factory-floor PLCs. IC Role / Device Role / Timing Role: Dual 4-to-1 analog switch providing fault-isolated signal selection with rail-to-rail integrity and fast transient suppression. Use Value: Eliminates need for external clamping diodes and level shifters while maintaining ±0.01% gain accuracy across channels due to 15Ω RON matching. | Use Scenario: Routing redundant flight-control signals (e.g., elevator position feedback) between primary and backup avionics computers. IC Role / Device Role / Timing Role: Fault-tolerant signal selector ensuring continuity during ±25V transients induced by EMI or lightning-induced surges. Use Value: 20ns fault response prevents signal corruption during critical control loops; ±40V off-state protection enables safe reconfiguration mid-flight. |
| Redundant Backup Systems | Process Control Signal Conditioning |
Use Scenario: Switching between primary and secondary 4–20mA transmitter outputs in safety-critical oil-refinery controllers. IC Role / Device Role / Timing Role: Dual-channel selector enabling seamless failover with break-before-make timing (400ns) preventing short-circuit hazards. Use Value: Independent enable (EN) and address control allow synchronized switchover across both channels without cross-talk or momentary shorts. | Use Scenario: Isolating and routing analog I/O signals in distributed control system (DCS) marshalling cabinets exposed to 48V DC field wiring. IC Role / Device Role / Timing Role: High-voltage multiplexer handling +24V/−24V common-mode noise while passing 0–5V process signals intact. Use Value: ±25V on-state fault tolerance withstands accidental contact with 48V field power, avoiding costly system downtime. |
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 |
|---|---|---|---|
| MAX4509CSE+ | Same silicon die, but in 16-pin narrow SOIC (S16-8) package-smaller footprint, surface-mount only. | Preferred for space-constrained PCBs; thermal performance differs due to lower θJA (8.70mW/°C vs. 10.53mW/°C for DIP). | Select MAX4509CSE+ when automated assembly and board density are priorities; MAX4509CPE+ suits through-hole prototyping or high-reliability vibration environments. |
| ADG509BNZ | Pin-compatible dual 4-to-1 mux but lacks fault protection; 300Ω typical RON, no rail-to-rail capability with ±15V supplies. | Requires external clamping and level-shifting for ±10V signals; unsuitable for unattended industrial sites with wiring fault risks. | Choose ADG509BNZ only in benign, low-voltage lab environments where fault events are excluded by system design. |
Compared with MAX4509CSE+ and ADG509BNZ, the MAX4509CPE+ uniquely combines through-hole reliability, integrated ±40V fault protection, and true rail-to-rail operation-making it the sole option for ruggedized, field-deployable systems requiring zero external protection components.
Availability
MAX4509CPE+ is available at Aetrix Electronics and suitable for industrial data-acquisition systems, avionics signal routing, and redundant backup systems requiring stable component supply across extended product lifecycles.
Supply support for MAX4509CPE+ 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 industrial, automotive, and communications markets.
The MAX4508/MAX4509 product line was engineered specifically for high-voltage, fault-tolerant signal routing in harsh environments-addressing the need for robust multiplexing without external protection circuitry in process control and aerospace applications.
FAQ
What is the maximum allowable input voltage on NO pins for MAX4509CPE+ when supplies are powered off?
The MAX4509CPE+ supports ±40V on NO_ pins with supplies off (V+ = V− = 0). This allows safe connection to live field wiring during system maintenance or hot-swap scenarios without damaging the device. Exceeding ±40V risks permanent damage per Absolute Maximum Ratings. The specification is validated in the datasheet's "Fault Protection" section and confirmed in Electrical Characteristics tables for supplies-off conditions.
Does MAX4509CPE+ require power-supply sequencing between V+ and V−?
No, MAX4509CPE+ does not require power-supply sequencing. Its internal logic and fault comparators operate correctly regardless of the order or timing of V+ and V− ramp-up. This eliminates complex power-rail control circuitry in systems with multiple supply domains. The feature is explicitly stated in the "Features" list and verified in Applications Information under "Power Supplies".
Can MAX4509CPE+ handle rail-to-rail signals with ±15V supplies?
Yes, MAX4509CPE+ fully supports rail-to-rail signal handling from V− to V+ with ±15V supplies. Unlike traditional fault-protected muxes that lose 3V headroom near rails, its parallel N/P-FET architecture passes signals across the entire ±15V range without distortion or clipping. This is confirmed in the "Detailed Description" section and demonstrated in Figure 14 ("Fault-Free Rail-to-Rail Signal Handling").
What is the on-resistance match between channels for MAX4509CPE+?
The MAX4509CPE+ guarantees ≤15Ω maximum on-resistance mismatch (ΔRON) between any two channels under standard operating conditions (V+ = +15V, V− = −15V, TA = +25°C). This tight matching ensures consistent gain and minimal crosstalk in differential or ratiometric measurement applications, as specified in the "Electrical Characteristics" table under "On-Resistance Match Between Channels".
Is the COM pin fault-protected on MAX4509CPE+?
No, the COMA and COMB pins on MAX4509CPE+ are not fault-protected. They must remain within the V− to V+ supply range at all times. Exceeding these limits forward-biases internal ESD diodes, risking permanent damage. This limitation is clearly stated in the "Detailed Description" section and reinforced in the "Absolute Maximum Ratings" table under "COM_, A_ (Note 1)".
MAX4509CPE+ 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX4509CPE+ FAQ
1.How can I place an order for MAX4509CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4509CPE+ 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 MAX4509CPE+ reliable?
The price and inventory of MAX4509CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4509CPE+ is usually 5 days.
3.What payment methods are accepted for MAX4509CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4509CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4509CPE+?
MAX4509CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4509CPE+ 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 MAX4509CPE+?
For technical support, including MAX4509CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4509CPE+ requirements.
6.How does Aetrix verify that MAX4509CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX4509CPE+ 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 MAX4509CPE+ meets industry standards.
7.What is the process for return or replacement of MAX4509CPE+?
All MAX4509CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4509CPE+, 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 MAX4509CPE+ part is unused and in its original packaging.
Return procedure for MAX4509CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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