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Analog Devices Inc./Maxim Integrated MAX4521CSE+T
- Part No.:
- MAX4521CSE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4521CSE+T.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,243
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Product details
Overview
MAX4521CSE+T from Maxim Integrated is a quad, low-voltage, normally closed (NC) SPST analog switch IC designed for rail-to-rail signal routing in precision analog and mixed-signal systems. It features 100Ω max on-resistance (at ±5V), 4Ω max channel-to-channel on-resistance matching, <1µW quiescent power, and operates from +2V to +12V single supply or ±2V to ±6V dual supplies. It is used in battery-powered data acquisition front-ends where low leakage (<1nA at +25°C) and minimal charge injection (1–5pC) are critical.
For engineers reviewing the MAX4521CSE+T datasheet, MAX4521CSE+T pinout, MAX4521CSE+T application, or MAX4521CSE+T equivalent, key selection criteria include NC-switch topology, SO-16 narrow-body package compatibility, TTL/CMOS logic thresholds (+0.8V/2.4V), ESD robustness (>2kV), and verified rail-to-rail analog signal handling up to ±4.5V with ±5V supplies.
Technical Context
The MAX4521CSE+T implements four independent CMOS SPST switches with normally closed configuration-each switch connects COM to NC when logic input is low. Its internal architecture uses complementary N- and P-channel MOSFETs driven by level-translated control signals, enabling true bidirectional analog conduction and eliminating ground reference dependency for analog paths.
It supports both single-supply (V− = GND) and split-supply operation, with V+ internally connected to substrate and ESD diodes clamping all analog pins to V+ and V−. Logic inputs are referenced to V+ and GND, ensuring TTL/CMOS compatibility across supply ranges, while analog signal range is strictly bounded by V+ and V− rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V - ensures minimal voltage drop and gain error in signal-path applications like sensor multiplexing. |
| On-resistance match (ΔRON) | 4Ω max between channels - enables precise channel-to-channel tracking in differential or ratiometric measurement circuits. |
| Off-leakage current | 1nA at +25°C - preserves accuracy in high-impedance, low-current circuits such as piezoelectric sensor interfaces. |
| Supply range | +2V to +12V single or ±2V to ±6V dual - supports portable (3.3V/5V) and industrial (±5V) analog signal chains without level-shifting. |
| Logic thresholds | +0.8V low / +2.4V high - guarantees reliable switching with standard 5V TTL and CMOS outputs without external biasing. |
| Charge injection | 1–5pC - limits voltage glitch on sampled-hold nodes, critical for ADC front-end sample-and-hold stability. |
| ESD protection | >2kV per Method 3015.7 - provides robust handling during board assembly and field deployment in test equipment. |
Pinout & Package
MAX4521CSE+T is housed in a 16-pin narrow SOIC (SO-16N) package, 3.9mm wide, with standard 1.27mm pitch and gull-wing leads. Pin 1 is marked by a beveled corner or dot; exposed pad is absent (non-QFN variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | NC1–NC4 | Normally closed analog terminals - connect to signal source when switch is inactive (INx = low); interchangeable with COMx. |
| 2, 5, 10, 13 | COM1–COM4 | Common analog terminals - bidirectional signal path; no ground reference required; voltage range limited by V+ and V−. |
| 3, 6, 11, 14 | IN1–IN4 | Digital control inputs - active-low logic: INx = low → COMx connected to NCx; TTL/CMOS compatible thresholds. |
| 7 | GND | Digital ground reference - only for logic circuitry; analog paths are fully floating between V+ and V−. |
| 8 | V− | Negative analog supply - set to GND for single supply; defines lower bound of analog signal range. |
| 15, 16 | V+ | Positive analog/digital supply - powers analog switches and logic; internally tied to substrate; sets upper analog limit. |
| 11 | N.C. | No connection - not internally bonded; must remain unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports signals from V− to V+ - enables direct interfacing with op-amps, DACs, and sensors operating at full supply rails. |
| Quad independently controlled SPST switches | Four isolated NC switches - allows flexible signal routing in multi-channel data loggers without cross-talk risk. |
| Low on-resistance flatness | 12Ω max over signal range - maintains consistent gain and linearity across full analog input span (e.g., ±4.5V). |
| Pin-compatible with DG211 | Direct replacement for industry-standard DG211 in SO-16 footprint - simplifies legacy design upgrades with no layout change. |
| Ultra-low power consumption | <1µW typical - extends battery life in portable instrumentation and handheld test gear. |
Applications
| Portable Data Acquisition | Avionics Signal Conditioning |
|---|---|
|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs into a single 24-bit sigma-delta ADC in a handheld environmental monitor. IC Role / Device Role / Timing Role: Quad NC switch routes analog sensor outputs to common front-end amplifier and filter stage; timing-critical only during channel settling (tON/tOFF < 100ns). Use Value: 1nA off-leakage prevents DC offset drift in high-Z sensor bridges; 4Ω RON matching ensures ratiometric accuracy across channels. |
Use Scenario: Selecting between redundant inertial measurement unit (IMU) analog outputs in flight control electronics. IC Role / Device Role / Timing Role: Fault-tolerant analog switch isolates primary and backup IMU signals; NC default ensures continuity during power-up or logic fault. Use Value: >2kV ESD rating withstands aircraft static discharge events; rail-to-rail operation handles ±5V sensor outputs without clipping. |
| Battery-Powered Test Equipment | Professional Audio Routing |
|
Use Scenario: Configuring input attenuation and coupling (AC/DC) paths in a handheld oscilloscope probe interface. IC Role / Device Role / Timing Role: SPST switches enable programmable gain/offset calibration paths and signal path isolation during self-test sequences. Use Value: 100Ω RON introduces negligible loading on 1MΩ scope inputs; 5pC charge injection avoids visible glitches on 100MHz bandwidth displays. |
Use Scenario: Muting and routing line-level audio signals between microphone preamp outputs and analog-to-digital converter inputs in digital mixing consoles. IC Role / Device Role / Timing Role: NC topology provides fail-safe mute (signal passes unless de-asserted), reducing pop/click risk during power cycling. Use Value: -90dB off-isolation suppresses crosstalk between adjacent audio channels; flat RON preserves frequency response up to 50MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522CSE+T | Quad NO (normally open) topology vs. MAX4521CSE+T's NC - requires active-high enable for signal passage. | Suitable where default-open safety state is required (e.g., power-off signal isolation), not fail-safe continuity. | Select MAX4522CSE+T only if system logic mandates signal interruption at power-up or reset. |
| ADG1411BRZ | Higher on-resistance (1.8Ω typ), wider supply (±15V), but higher leakage (20nA @ +85°C) and no NC default. | Better for high-voltage industrial I/O; less suitable for ultra-low-leakage battery applications below +70°C. | Choose ADG1411BRZ when ±15V operation or lower RON is prioritized over leakage and NC behavior. |
Compared with MAX4521CSE+T, MAX4522CSE+T offers inverted logic control but identical package and drive specs, while ADG1411BRZ trades NC safety and low leakage for higher voltage tolerance and lower RON - making MAX4521CSE+T optimal for low-power, fail-safe, rail-to-rail portable analog routing.
Availability
MAX4521CSE+T is available at Aetrix Electronics and suitable for battery-operated equipment, avionics signal conditioning, and portable test equipment requiring stable component supply, long-term manufacturability, and guaranteed temperature-grade compliance (0°C to +70°C).
Supply support for MAX4521CSE+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, medical, and communications applications.
The MAX4521/MAX4522/MAX4523 family was engineered specifically for low-voltage, low-leakage, rail-to-rail analog switching in space-constrained, battery-sensitive systems - emphasizing NC/NO flexibility, ESD resilience, and seamless TTL/CMOS integration.
FAQ
What is the default switch state of MAX4521CSE+T?
The MAX4521CSE+T features four normally closed (NC) SPST switches. When all IN1–IN4 inputs are held low (≤0.8V), each COMx terminal is connected to its corresponding NCx terminal. This fail-safe default ensures signal continuity during power-up, reset, or logic failure - a key differentiator from NO variants like MAX4522CSE+T.
Can MAX4521CSE+T operate from a single 3.3V supply?
Yes, MAX4521CSE+T is fully specified for single +2.7V operation. At V+ = 3.3V and V− = GND, it delivers 260Ω max on-resistance, 0.8V/1.6V logic thresholds, and 120ns turn-on time - making it suitable for modern low-voltage microcontroller-based data loggers and IoT sensor nodes.
Does MAX4521CSE+T require external pull-up or pull-down resistors on its INx pins?
No. MAX4521CSE+T has defined TTL/CMOS-compatible logic thresholds (+0.8V low, +2.4V high) and draws only ±1µA input current. Direct connection to MCU GPIOs or logic gates is sufficient; external biasing resistors are unnecessary and may degrade noise immunity or switching speed.
How does the analog signal range of MAX4521CSE+T relate to its supply voltages?
The analog signal range of MAX4521CSE+T is strictly rail-to-rail: signals on COMx, NCx, or INx pins must stay within V− and V+ (e.g., −5V to +5V for dual ±5V supplies). Exceeding these bounds forward-biases internal ESD diodes, risking latch-up or increased leakage - so signal clamping or level-shifting is required outside this window.
Is MAX4521CSE+T pin-compatible with the DG211 analog switch?
Yes, MAX4521CSE+T is explicitly pin-compatible with the industry-standard DG211 in SO-16 narrow-body packaging. Both share identical pin functions (IN/COM/NC assignments), supply pin locations (V+/V−/GND), and mechanical footprint - enabling drop-in replacement without PCB redesign or layout modification.
MAX4521CSE+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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX4521CSE+T FAQ
1.How can I place an order for MAX4521CSE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521CSE+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 MAX4521CSE+T reliable?
The price and inventory of MAX4521CSE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521CSE+T is usually 5 days.
3.What payment methods are accepted for MAX4521CSE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521CSE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521CSE+T?
MAX4521CSE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521CSE+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 MAX4521CSE+T?
For technical support, including MAX4521CSE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521CSE+T requirements.
6.How does Aetrix verify that MAX4521CSE+T is sourced from the original manufacturer or authorized distributors?
All MAX4521CSE+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 MAX4521CSE+T meets industry standards.
7.What is the process for return or replacement of MAX4521CSE+T?
All MAX4521CSE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521CSE+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 MAX4521CSE+T part is unused and in its original packaging.
Return procedure for MAX4521CSE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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