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Analog Devices Inc./Maxim Integrated MAX4533EAP+
- Part No.:
- MAX4533EAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX4533EAP+.pdf
- Description:
- IC SWITCH SPDT X 4 175OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,083
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Product details
Overview
MAX4533EAP+ from Maxim Integrated is a quad, single-pole/double-throw (SPDT), fault-protected analog switch with rail-to-rail signal handling, ±25V fault protection with power on, and 175Ω max on-resistance at ±15V supplies. It operates from dual ±4.5V to ±18V or single +9V to +36V supplies and features TTL/CMOS-compatible logic inputs - used in test equipment, data-acquisition systems, and industrial control where overvoltage resilience and signal integrity are critical.
For engineers reviewing the MAX4533EAP+ datasheet, MAX4533EAP+ pinout, MAX4533EAP+ application, or MAX4533EAP+ equivalent, key selection factors include fault-protection voltage limits (±25V powered / ±40V unpowered), channel-to-channel on-resistance matching (≤10Ω), break-before-make timing (20ns typ), and SSOP-20 package compatibility with legacy MAX333A designs.
Technical Context
The MAX4533EAP+ uses parallel N-channel and P-channel MOSFETs per SPDT channel, enabling rail-to-rail conduction and low on-resistance (125Ω typ) without signal clipping near supply rails. Its internal voltage-sensing comparators monitor NO_/NC_ terminals continuously, triggering clamp circuitry (N2/P2) within 20ns when input exceeds V± by ~150mV.
During fault conditions, COM_ is actively clamped to the appropriate supply rail (V+ or V−) while NO_/NC_ enter high-impedance state (<0.5nA leakage at +25°C). The device requires no power-supply sequencing and maintains all switches off during power-off - eliminating unintended signal paths in safety-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (max) | 175Ω at ±15V - ensures minimal signal attenuation and thermal drift in precision analog routing |
| Fault protection (powered) | ±25V on NO_/NC_ - protects downstream circuitry from transient overvoltages during live operation |
| Fault protection (unpowered) | ±40V on NO_/NC_ - enables safe hot-swap or maintenance of connected sensors/actuators |
| Logic thresholds | +0.8V low / +2.4V high - guarantees interoperability with both TTL and CMOS drivers across supply ranges |
| Turn-on time (typ) | 20ns at ±15V - supports high-speed multiplexing in automated test equipment and real-time DAQ |
| Off-leakage current (max) | 10nA at +85°C - preserves accuracy in high-impedance sensor interfaces and battery-powered instruments |
| Supply range | Dual ±4.5V to ±18V or single +9V to +36V - accommodates industrial ±15V, avionics +28V, and portable +12V systems |
Pinout & Package
MAX4533EAP+ is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, RoHS-compliant, and rated for −40°C to +85°C operation. The package provides compact board area and thermal performance suitable for dense instrumentation layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 11, 20 (IN1–IN4) |
Logic control input | Drives SPDT channel state (NO or NC connection to COM); accepts TTL/CMOS levels independent of analog supply |
| 2, 9, 12, 19 (NO1–NO4) |
Fault-protected analog input (normally open) | Withstands ±25V faults when powered; enters high-Z during fault; bidirectional signal path when within rails |
| 3, 8, 13, 18 (COM1–COM4) |
Analog common output | Clamped to V+ or V− during fault; carries full rail-to-rail signal; leakage <10nA at +85°C |
| 4, 7, 14, 17 (NC1–NC4) |
Fault-protected analog input (normally closed) | Same fault tolerance as NO_; complementary path to COM when IN = logic low |
| 5 (V−) | Negative analog supply | Bipolar supply rail; sets lower signal limit and gate drive for P-FETs; must be ≥ −18V |
| 6 (GND) | Digital ground reference | Reference for logic inputs only; isolated from analog signal paths; includes ESD diodes to V+/V− |
| 15 (N.C.) | No internal connection | Unbonded pad; must remain floating - no PCB trace or solder mask relief required |
| 16 (V+) | Positive analog/digital supply | Powers logic core and level translators; defines upper signal limit and N-FET gate drive; up to +18V (dual) or +36V (single) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - essential for full-scale sensor outputs and DAC interfaces |
| ±40V fault protection with power off | Enables safe field replacement or probing of live circuits without risk of latch-up or permanent damage |
| Output clamping during fault | COM_ actively driven to V+ or V− (not floating) - prevents undefined states in downstream comparators or ADC references |
| Pin-compatible with MAX333/MAX333A | Drop-in upgrade path for legacy designs requiring enhanced fault tolerance and lower RON |
| No power-supply sequencing required | V+, V−, and GND may be applied in any order - eliminates need for external supervisors or sequencers in multi-rail systems |
Applications
| Test Equipment Multiplexer | Data-Acquisition Front-End |
|---|---|
|
Use Scenario: High-voltage signal routing in automated test systems switching between DUTs with varying output ranges (±10V, 0–24V). IC Role / Device Role / Timing Role: Quad SPDT switch selecting analog inputs to a shared precision ADC; fault protection prevents damage from miswired DUTs or relay bounce transients. Use Value: ±25V powered fault tolerance eliminates need for external TVS diodes per channel, reducing BOM count and layout area by 40% vs. unprotected switches. |
Use Scenario: Isolating sensor inputs (thermocouples, strain gauges) in industrial PLC modules exposed to motor-drive noise and ground shifts. IC Role / Device Role / Timing Role: Signal-path protector and multiplexer; COM_ clamping holds ADC reference stable during line surges; break-before-make prevents shorting adjacent channels. Use Value: 20ns fault response time limits overvoltage exposure to <100ns - below energy threshold for most op-amp input stage damage. |
| Avionics Backup Channel Selector | Portable Instrument Signal Conditioning |
|
Use Scenario: Redundant flight-control sensor voting system requiring fail-safe channel isolation during in-flight anomalies. IC Role / Device Role / Timing Role: Fault-protected SPDT switch enabling automatic switchover from primary to backup sensor; all switches default OFF at power loss. Use Value: ±40V unpowered fault rating allows continued protection during main bus failure - meeting DO-160 Section 22 induced transient requirements. |
Use Scenario: Battery-powered handheld multimeter with autoranging analog front-end and multiple input jacks. IC Role / Device Role / Timing Role: Input protection and range-selection switch; rail-to-rail operation preserves resolution across 100µV to 1000V ranges; low 0.5nA leakage avoids offset errors in nanoamp measurements. Use Value: Single +12V supply operation simplifies power architecture versus dual-rail alternatives - extending battery life by 18% in continuous measurement mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fault-protected analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX333AEPP+ | Lower fault rating (±15V powered), higher RON (350Ω max), no COM_ clamping - relies on external protection | Suitable for cost-sensitive, non-safety-critical lab equipment with controlled environments | Select when legacy footprint compatibility is mandatory and fault exposure is limited to ≤±15V |
| ADG5412FBRUZ | Integrated fault detection flag output, ±40V fault rating (both powered/unpowered), 120Ω max RON, but requires external charge pump for rail-to-rail | Preferred for systems needing diagnostic feedback (e.g., predictive maintenance alerts in process control) | Choose when real-time fault reporting is required and board space allows auxiliary components |
Compared with MAX333AEPP+ and ADG5412FBRUZ, the MAX4533EAP+ uniquely delivers rail-to-rail conduction, active COM_ clamping, and pin compatibility with legacy designs - making it optimal for upgrading existing test and industrial systems without layout revision.
Availability
MAX4533EAP+ is available at Aetrix Electronics and suitable for test equipment, industrial process control, and avionics systems requiring stable component supply, extended temperature operation (−40°C to +85°C), and certified fault resilience.
Supply support for MAX4533EAP+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX4533EAP+ belongs to Maxim's fault-protected analog switch product line, engineered for mission-critical signal routing where overvoltage events, system reliability, and design reuse are primary concerns.
FAQ
What is the maximum fault voltage the MAX4533EAP+ can withstand with power applied?
The MAX4533EAP+ withstands up to ±25V on NO_ or NC_ terminals when power is applied (V+ and V− active). This rating applies with ±15V supplies; exceeding ±25V risks permanent damage. The device clamps COM_ to the appropriate supply rail during such faults, limiting downstream exposure. MAX4533EAP+ does not support higher fault voltages under powered conditions - even briefly.
Is the MAX4533EAP+ pin-compatible with the MAX333A, and what are the functional improvements?
Yes, the MAX4533EAP+ is fully pin-compatible with the MAX333A and serves as a direct drop-in replacement. Key improvements include ±25V powered fault protection (vs. ±15V), 175Ω max on-resistance (vs. 350Ω), rail-to-rail signal handling, and active COM_ clamping during faults. MAX4533EAP+ also offers tighter on-resistance matching (≤10Ω) and faster fault response (20ns vs. unspecified in MAX333A).
Can the MAX4533EAP+ operate from a single supply, and what is the valid voltage range?
Yes, the MAX4533EAP+ supports single-supply operation with V− tied to GND and V+ ranging from +9V to +36V. At +12V, typical on-resistance is 260Ω, and logic thresholds remain TTL/CMOS-compatible (+0.8V low, +2.4V high). The device maintains fault protection (±25V on NO_/NC_) and rail-to-rail conduction across this full range - verified in the datasheet's single-supply electrical characteristics tables.
What happens to the MAX4533EAP+ outputs during power-down, and how does it protect connected circuitry?
During power-down (V+ = V− = 0), all MAX4533EAP+ switches turn OFF, and NO_/NC_ terminals tolerate ±40V faults relative to GND. COM_ remains high-impedance and unclamped, but leakage is limited to ±10µA. This behavior isolates downstream circuitry from overvoltage events even when unpowered - a critical feature for hot-swap instrumentation and maintenance scenarios involving the MAX4533EAP+.
Does the MAX4533EAP+ require external components for fault protection, or is it self-contained?
The MAX4533EAP+ is fully self-contained for fault protection: no external TVS diodes, resistors, or capacitors are needed to achieve its rated ±25V (powered) or ±40V (unpowered) protection. Internal clamp circuitry (N2/P2 FETs) and sensing comparators handle overvoltage detection and COM_ rail clamping autonomously. External components are only required for application-specific filtering or EMI suppression - not for basic fault resilience of the MAX4533EAP+.
MAX4533EAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 175Ohm
- Channel-to-Channel Matching (ΔRon):
- 1Ohm
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 250ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1.5pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF
- Current - Leakage (IS(off)) (Max):
- 20nA
- Crosstalk:
- -66dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
MAX4533EAP+ FAQ
1.How can I place an order for MAX4533EAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4533EAP+ 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 MAX4533EAP+ reliable?
The price and inventory of MAX4533EAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4533EAP+ is usually 5 days.
3.What payment methods are accepted for MAX4533EAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4533EAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4533EAP+?
MAX4533EAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4533EAP+ 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 MAX4533EAP+?
For technical support, including MAX4533EAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4533EAP+ requirements.
6.How does Aetrix verify that MAX4533EAP+ is sourced from the original manufacturer or authorized distributors?
All MAX4533EAP+ 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 MAX4533EAP+ meets industry standards.
7.What is the process for return or replacement of MAX4533EAP+?
All MAX4533EAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4533EAP+, 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 MAX4533EAP+ part is unused and in its original packaging.
Return procedure for MAX4533EAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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