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Analog Devices Inc./Maxim Integrated MAX4521EEE+T
- Part No.:
- MAX4521EEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX4521EEE+T.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,527
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Product details
Overview
MAX4521EEE+T from Maxim Integrated is a quad, low-voltage, normally closed (NC) SPST analog switch IC designed for precision signal routing in battery-powered and rail-to-rail systems. It delivers 100Ω max on-resistance, 4Ω max channel-to-channel RON matching, and 12Ω max RON flatness across ±4.5V signal range, operating from ±2V to ±6V dual supplies or +2.7V to +12V single supply - used in audio signal routing and data acquisition front-ends.
For engineers reviewing the MAX4521EEE+T datasheet, MAX4521EEE+T pinout, MAX4521EEE+T application, or MAX4521EEE+T equivalent, key selection criteria include NC configuration, QSOP-16 package compatibility, <1nA off-leakage at +25°C, rail-to-rail analog handling, and TTL/CMOS logic thresholds with ±5V or +5V supply.
Technical Context
The MAX4521EEE+T implements four independent CMOS SPST switches with normally closed topology, each driven by separate digital control inputs (IN1–IN4) that toggle COM–NC conduction. Its internal architecture uses complementary N- and P-channel MOSFETs with phase-inverted gate drive referenced to V+ and V−, enabling true rail-to-rail analog signal swing without ground reference.
ESD protection (>2kV per Method 3015.7) is integrated via reverse-biased diodes between all analog pins (COM/NC) and V+/V−, while leakage current flows exclusively to supply rails-not across channels-ensuring predictable off-isolation (>−90dB at 100kHz) and minimal crosstalk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and voltage drop in precision analog paths. |
| RON matching | 4Ω max between channels - critical for matched gain/phase in multi-channel instrumentation or balanced audio routing. |
| RON flatness | 12Ω max over ±4.5V signal range - maintains consistent insertion loss across full analog input span. |
| Off-leakage current | 1nA at +25°C, 10nA at +85°C - preserves signal integrity in high-impedance sensor interfaces and battery-critical standby modes. |
| Supply range | +2.7V to +12V single or ±2V to ±6V dual - supports wide-input industrial sensors and legacy ±5V test equipment. |
| Logic thresholds | VIN_L = 0.8V, VIN_H = 2.4V - guarantees interoperability with TTL and CMOS logic without level-shifting. |
| Turn-on/off time | tON = 100ns, tOFF = 40ns at ±4.5V - enables fast multiplexing in data acquisition systems up to ~5MHz effective sample rate. |
Pinout & Package
MAX4521EEE+T is housed in a 16-pin QSOP (E16-4) package, 3.9mm × 4.9mm body, 0.635mm pitch, with exposed pad connected to V+. Pin functions are fully defined per Maxim's datasheet Rev 6 (19-1136).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | NC1–NC4 | Normally closed analog terminals - conduct to COM when IN = logic low; no internal connection to GND or V−. |
| 2, 5, 10, 13 | COM1–COM4 | Common analog terminals - bidirectional signal path; interchangeable with NC/NO per application layout. |
| 3, 6, 11, 14 | IN1–IN4 | Digital control inputs - active-low logic controls NC closure; compatible with 0.8V/2.4V TTL/CMOS thresholds. |
| 7 | GND | Digital ground reference only - analog signal paths are floating between V+ and V−, not referenced to GND. |
| 8 | V− | Negative analog supply - sets lower analog voltage limit; connect to GND for single-supply operation. |
| 15, 16 | V+ | Positive analog/digital supply - powers internal logic translators and switch gates; substrate-connected. |
| 11 (N.C.) | No Connection | Internally unconnected pin - must be left floating or tied to V+ per layout best practice; not for decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog handling | Signals from V− to V+ pass unclamped - eliminates external biasing in ±5V or +3.3V sensor interfaces. |
| Low power consumption | <1µW quiescent - enables always-on signal routing in portable medical devices and IoT edge nodes. |
| Pin compatibility | Drop-in replacement for DG211 - simplifies legacy system upgrades without PCB redesign. |
| ESD robustness | >2kV HBM per Method 3015.7 - withstands handling and board-level transients in manufacturing and field use. |
| Channel independence | Four separately controlled SPST switches - supports discrete signal gating in multi-sensor data loggers. |
Applications
| Audio Signal Routing | Data Acquisition Front-End |
|---|---|
|
Use Scenario: Switching between multiple microphone inputs or headphone outputs in portable audio codecs. IC Role / Device Role / Timing Role: Quad NC analog switch providing low-distortion, low-crosstalk signal path selection with no DC bias required. Use Value: 100Ω RON and <−90dB off-isolation preserve THD <0.01% at 1kHz; 1nA leakage prevents capacitor discharge in AC-coupled paths. |
Use Scenario: Multiplexing sensor outputs (thermocouples, strain gauges) into a shared ADC channel. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with matched RON and flat frequency response to 50MHz. Use Value: 4Ω RON matching minimizes gain error across channels; rail-to-rail support accommodates ±10V industrial sensors. |
| Battery-Operated Test Equipment | Avionics Signal Conditioning |
|
Use Scenario: Low-power handheld multimeter auto-ranging and input protection circuitry. IC Role / Device Role / Timing Role: NC switch isolating high-voltage ranges during low-voltage measurement; controlled by microcontroller GPIO. Use Value: 1nA off-leakage extends battery life in sleep mode; ±2V min supply allows operation from single Li-ion cell (2.7–4.2V). |
Use Scenario: Redundant signal path selection and fault isolation in flight control interface units. IC Role / Device Role / Timing Role: Radiation-tolerant analog switch (−40°C to +85°C grade) routing ARINC 429 or discrete status signals. Use Value: Specified operation to +85°C ambient; >2kV ESD protects against static discharge in dry cabin environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522EEE+T | Quad NO (normally open) configuration vs. MAX4521EEE+T's NC - requires inverted logic control for same functional behavior. | Suitable where default-open safety state is required (e.g., power-off signal isolation), unlike MAX4521EEE+T's default-closed fail-safe path. | Select MAX4522EEE+T only if system logic naturally drives high to enable signal flow; otherwise, add inverters or choose MAX4521EEE+T. |
| ADG1412BRUZ | Higher RON (1.8Ω typical vs. 100Ω max), but 12V single-supply only; no dual-supply support; different pinout and package (TSSOP-16). | Preferred for low-RON precision instrumentation with +12V rails; unsuitable for ±5V avionics or battery systems requiring dual supplies. | Choose ADG1412BRUZ only when ultra-low on-resistance dominates design priority and supply architecture matches - not a drop-in replacement. |
Compared with MAX4522EEE+T and ADG1412BRUZ, the MAX4521EEE+T uniquely combines NC topology, dual-supply flexibility (±2V to ±6V), and QSOP-16 footprint - making it optimal for fail-safe, multi-rail, space-constrained designs where leakage and matching are critical.
Availability
MAX4521EEE+T is available at Aetrix Electronics and suitable for battery-operated equipment, data acquisition systems, and avionics signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for MAX4521EEE+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4521/MAX4522/MAX4523 family was engineered for low-voltage, low-leakage analog switching in portable and precision instrumentation - emphasizing rail-to-rail operation, tight RON matching, and robust ESD tolerance.
FAQ
What is the operating temperature range for MAX4521EEE+T?
The MAX4521EEE+T is rated for −40°C to +85°C operation, as indicated by the "E" grade suffix in its part number. This extended industrial temperature range ensures reliable performance in automotive cabin modules, outdoor test gear, and avionics subsystems where ambient conditions exceed commercial-grade limits. All electrical specifications in the datasheet are guaranteed across this full range.
Does MAX4521EEE+T support single-supply operation?
Yes, MAX4521EEE+T supports single-supply operation from +2.7V to +12V. To configure for single supply, connect V− to GND. The device remains fully specified at +2.7V, delivering 600Ω max RON and maintaining TTL/CMOS-compatible logic thresholds - enabling direct interfacing with 3.3V microcontrollers in portable medical devices.
How does the NC (normally closed) configuration of MAX4521EEE+T affect system safety?
The NC configuration means each switch conducts between COM and NC when its IN pin is logic low (0V). This provides a fail-safe default path: if control logic fails or power is lost, signals remain routed - critical in safety-critical applications like aircraft sensor monitoring or emergency shutdown circuits. MAX4521EEE+T's 1nA off-leakage at +25°C ensures minimal signal corruption during active control.
Is MAX4521EEE+T pin-compatible with industry-standard analog switches?
Yes, MAX4521EEE+T is explicitly pin-compatible with the DG211 family in QSOP-16 packaging. Pin assignments for COM, NC, IN, V+, V−, and GND match directly, allowing drop-in replacement without PCB modification. However, note that DG211 uses different logic polarity (active-high), so firmware or external inverters may be needed to maintain functional equivalence.
What is the maximum analog signal voltage range supported by MAX4521EEE+T?
MAX4521EEE+T supports rail-to-rail analog signals from V− to V+. With ±5V dual supplies, this yields a ±4.5V usable range (clamped by internal ESD diodes); with +5V single supply (V− = GND), the range is 0V to +4.5V. Exceeding V+ or V− forward-biases internal protection diodes - limiting absolute max signal to (V− − 0.3V) to (V+ + 0.3V) per Absolute Maximum Ratings.
MAX4521EEE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 1Ohm
- Voltage - Supply, Single (V+):
- 2V ~ 12V
- Voltage - Supply, Dual (V±):
- ±2V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 80ns, 30ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX4521EEE+T FAQ
1.How can I place an order for MAX4521EEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521EEE+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 MAX4521EEE+T reliable?
The price and inventory of MAX4521EEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521EEE+T is usually 5 days.
3.What payment methods are accepted for MAX4521EEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521EEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521EEE+T?
MAX4521EEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521EEE+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 MAX4521EEE+T?
For technical support, including MAX4521EEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521EEE+T requirements.
6.How does Aetrix verify that MAX4521EEE+T is sourced from the original manufacturer or authorized distributors?
All MAX4521EEE+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 MAX4521EEE+T meets industry standards.
7.What is the process for return or replacement of MAX4521EEE+T?
All MAX4521EEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521EEE+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 MAX4521EEE+T part is unused and in its original packaging.
Return procedure for MAX4521EEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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