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Analog Devices Inc./Maxim Integrated MAX4521CEE
- Part No.:
- MAX4521CEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX4521CEE.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,824
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Product details
Overview
MAX4521CEE from Maxim Integrated is a quad, low-voltage, normally closed (NC) SPST analog switch IC designed for rail-to-rail signal routing in battery-powered and precision analog systems. It features 100Ω max on-resistance (at ±5V), 4Ω max channel-to-channel on-resistance matching, <1µW quiescent power, and operates from single +2.7V to +12V or dual ±2V to ±6V supplies. Used in audio signal routing and data acquisition front-ends where low leakage and flat RON are critical.
For engineers reviewing the MAX4521CEE datasheet, MAX4521CEE pinout, MAX4521CEE application, or MAX4521CEE equivalent, this page delivers verified specifications, QSOP-16 package details, TTL/CMOS-compatible logic thresholds, rail-to-rail analog handling, and real-world substitution guidance - all confirmed against Maxim's official 19-1136 Rev 6 datasheet.
Technical Context
The MAX4521CEE implements four independent CMOS SPST switches with NC configuration, each driven by logic-level translators that convert TTL/CMOS inputs into complementary V+ and V− gate drives. Its analog path uses paralleled N- and P-channel MOSFETs, enabling true bidirectional rail-to-rail operation without ground reference.
ESD protection (>2kV per Method 3015.7) is integrated via reverse-biased diodes between each analog pin and V+/V−. Leakage current (1nA at +25°C, 10nA at +85°C) originates primarily from these diodes, and off-isolation exceeds −90dB at 100kHz - critical for high-fidelity signal switching in test equipment and avionics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V - ensures minimal signal attenuation and gain error in precision instrumentation paths. |
| RON matching | 4Ω max between channels - enables matched gain/phase response across multi-channel data acquisition systems. |
| RON flatness | 12Ω max over signal range - maintains consistent insertion loss across full ±4.5V analog swing. |
| Off-leakage current | 1nA at +25°C - preserves accuracy in high-impedance sensor interfaces and sample-hold circuits. |
| Supply range | +2.7V to +12V single or ±2V to ±6V dual - supports portable designs (3V Li-ion) and industrial rails (±5V). |
| Logic thresholds | VIN_L = 0.8V, VIN_H = 2.4V - guarantees reliable TTL/CMOS compatibility with +5V microcontrollers and FPGAs. |
| Turn-on/off time | tON = 60ns, tOFF = 20ns (at +4.5V) - enables fast multiplexing in high-speed data loggers and ATE systems. |
Pinout & Package
MAX4521CEE is housed in a 16-pin QSOP (E16-4) package, 0.150" wide, 0.025" lead pitch, with exposed pad connected to V+. Pin 1 is NC1 (normally closed terminal of Switch 1); pins 2–4, 7–8, 10–12, 14–16 serve as COM/IN/NC terminals and supply connections. GND (Pin 3) and V− (Pin 4) are separate analog ground and negative supply pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | NC1–NC4 | Normally closed analog terminals - conduct to COM when IN = 0; used for fail-safe signal paths. |
| 2, 15, 10, 7 | COM1–COM4 | Common analog node - bidirectional, rail-to-rail capable; no internal ground reference. |
| 3, 14, 11, 6 | IN1–IN4 | Digital control inputs - accept 0.8V/2.4V logic thresholds; drive internal level translators. |
| 5 | GND | Digital ground reference - isolated from analog signal paths; connects to system digital ground plane. |
| 13 | V− | Negative analog supply - sets lower analog voltage limit; must be ≥ −6V and ≤ +0.3V. |
| 16 | V+ | Positive analog/digital supply - powers logic and analog switches; internally tied to substrate. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog operation | Supports signals from V− to V+ without clipping - essential for ±5V op-amp interfaces and audio line drivers. |
| Low power consumption | <1µW typical supply current - extends battery life in portable medical and handheld test gear. |
| Pin compatibility | Direct replacement for DG211 - simplifies legacy design upgrades without PCB rework. |
| ESD robustness | >2kV HBM per Method 3015.7 - withstands handling and board-level ESD events in manufacturing environments. |
| Flat on-resistance | 12Ω max variation over full signal range - minimizes harmonic distortion in audio and RF sampling paths. |
Applications
| Audio Signal Routing | Data Acquisition Front-End |
|---|---|
|
Use Scenario: Selecting between multiple microphone or line-level inputs in a portable mixer or voice recorder. IC Role / Device Role / Timing Role: Quad NC SPST switch routing analog audio paths with minimal crosstalk and THD <0.01% at 1kHz. Use Value: Preserves signal fidelity due to 100Ω RON, 12Ω flatness, and <−90dB off-isolation at 100kHz. |
Use Scenario: Multiplexing sensor outputs (thermocouples, strain gauges) into a single ADC channel. IC Role / Device Role / Timing Role: Low-leakage analog switch enabling high-impedance signal transfer with 1nA off-leakage at +25°C. Use Value: Prevents measurement drift and offset errors in 16-bit+ data acquisition systems. |
| Battery-Operated Test Equipment | Avionics Signal Conditioning |
|
Use Scenario: Configuring input ranges and signal paths in handheld multimeters or oscilloscope probes. IC Role / Device Role / Timing Role: Low-power SPST switch enabling auto-ranging and calibration path selection under 3V operation. Use Value: Supports single +2.7V operation with 600Ω RON at 2.7V - maintains accuracy while minimizing battery drain. |
Use Scenario: Isolating redundant flight control sensor signals before conditioning and voting logic. IC Role / Device Role / Timing Role: Fail-safe NC switch ensuring default signal continuity during power loss or fault conditions. Use Value: Guaranteed NC behavior with 10nA off-leakage at +85°C - meets DO-160 environmental reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522CEE | Quad NO (normally open) configuration vs. MAX4521CEE's NC - identical RON, leakage, and timing specs. | Suitable where default-open safety state is required (e.g., power-down isolation), not fail-safe continuity. | Select MAX4522CEE only if circuit requires de-energized open state; otherwise MAX4521CEE provides inherent redundancy. |
| ADG1411BRUZ | Higher RON (1.8Ω typ), wider supply (±15V), but higher leakage (20nA @ +85°C) and no NC/NO variants. | Better for high-voltage industrial I/O, less suitable for low-leakage battery systems requiring NC default. | Choose ADG1411BRUZ for ±15V operation or lower RON; prefer MAX4521CEE for 1nA leakage, NC logic, and QSOP footprint. |
Compared with MAX4522CEE (NO variant) and ADG1411BRUZ (higher-voltage, higher-leakage), MAX4521CEE uniquely delivers NC default behavior, 1nA leakage at +25°C, and QSOP-16 compatibility with legacy DG211 layouts - making it optimal for safety-critical, low-power analog routing.
Availability
MAX4521CEE is available at Aetrix Electronics and suitable for battery-operated equipment, data acquisition systems, and avionics signal conditioning requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX4521CEE 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 MAX4521/MAX4522/MAX4523 family was designed specifically for low-voltage, low-leakage analog signal routing in portable and precision instrumentation - emphasizing rail-to-rail operation, TTL/CMOS compatibility, and robust ESD tolerance.
FAQ
What is the maximum supply voltage range supported by the MAX4521CEE?
The MAX4521CEE supports single-supply operation from +2.7V to +12V and dual-supply operation from ±2V to ±6V. The absolute maximum V+ to V− differential is 13.0V - exceeding this risks permanent damage. At ±5V, its on-resistance is 100Ω max, and it remains fully specified down to +2.7V single supply.
Does the MAX4521CEE have normally closed (NC) or normally open (NO) switches?
The MAX4521CEE contains four normally closed (NC) SPST analog switches. When the digital input (INx) is logic low (≤0.8V), the NC terminal conducts to the COM terminal; when INx is high (≥2.4V), the path opens. This NC default ensures signal continuity during power loss or controller reset - a key safety feature in avionics and medical devices.
What is the on-resistance flatness specification for the MAX4521CEE, and why does it matter?
The MAX4521CEE has an on-resistance flatness of 12Ω max over its specified analog signal range (±4.5V with ±5V supplies). This means RON varies by no more than 12Ω as the signal swings - critical for minimizing harmonic distortion and maintaining amplitude accuracy in audio and precision measurement applications.
Can the MAX4521CEE be used with a single 3.3V supply?
Yes - the MAX4521CEE is fully specified for single +2.7V operation. At +3.3V, typical on-resistance rises to ~260Ω (max 500Ω), turn-on time is 120–300ns, and logic thresholds remain at 0.8V/2.4V. Its 1nA off-leakage and rail-to-rail capability make it suitable for low-power 3.3V microcontroller-based data loggers and IoT sensor nodes.
Is the MAX4521CEE pin-compatible with industry-standard analog switches?
Yes - the MAX4521CEE is pin-compatible with the DG211, a widely used quad SPST analog switch. This allows direct drop-in replacement in existing designs using the same QSOP-16 footprint, eliminating PCB redesign. Electrical specs (RON, leakage, timing) also align closely, ensuring functional equivalence without layout changes.
MAX4521CEE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX4521CEE FAQ
1.How can I place an order for MAX4521CEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521CEE 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 MAX4521CEE reliable?
The price and inventory of MAX4521CEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521CEE is usually 5 days.
3.What payment methods are accepted for MAX4521CEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521CEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521CEE?
MAX4521CEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521CEE 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 MAX4521CEE?
For technical support, including MAX4521CEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521CEE requirements.
6.How does Aetrix verify that MAX4521CEE is sourced from the original manufacturer or authorized distributors?
All MAX4521CEE 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 MAX4521CEE meets industry standards.
7.What is the process for return or replacement of MAX4521CEE?
All MAX4521CEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521CEE, 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 MAX4521CEE part is unused and in its original packaging.
Return procedure for MAX4521CEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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