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Analog Devices Inc./Maxim Integrated MAX4521CPE
- Part No.:
- MAX4521CPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4521CPE.pdf
- Description:
- IC SWITCH SPST-NCX4 100OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,521
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Product details
Overview
MAX4521CPE 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, 4Ω max channel-to-channel on-resistance matching, 12Ω max on-resistance flatness over ±4.5V signal range, <1µW power consumption, and operates from ±2V to ±6V dual or +2V to +12V single supply. It is used in battery-powered data acquisition front-ends where low leakage and signal integrity are critical.
For engineers reviewing the MAX4521CPE datasheet, MAX4521CPE pinout, MAX4521CPE application, or MAX4521CPE equivalent, key selection criteria include NC-switch topology, 1nA @ +25°C COM-off leakage, TTL/CMOS-compatible logic thresholds at +5V supply, 100Ω on-resistance with ±5V supplies, and compatibility with DG211 footprint for legacy system upgrades.
Technical Context
The MAX4521CPE implements four independent CMOS transmission gates with complementary N- and P-channel MOSFETs per switch, driven by level-shifted logic to support rail-to-rail analog signals up to V+ and down to V−. Its internal logic translators accept TTL/CMOS inputs (0.8V/2.4V thresholds) and generate full-rail gate drive voltages using V+ and V−, enabling operation across wide supply ranges including single +2.7V.
Each switch exhibits matched on-resistance (ΔRON ≤ 4Ω) and flat on-resistance (RFLAT(ON) ≤ 12Ω) over the full analog signal range, minimizing distortion in audio and instrumentation paths. ESD protection exceeds 2kV per Method 3015.7, and off-isolation reaches < −90dB at 100kHz with 50Ω terminations - 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 supplies - ensures minimal voltage drop and gain error in sensor signal paths |
| On-resistance match (ΔRON) | 4Ω max between channels - enables precise multi-channel gain/phase matching in data acquisition |
| On-resistance flatness | 12Ω max over ±4.5V signal range - maintains consistent attenuation across audio and DC-coupled signals |
| COM-off leakage current | 1nA at +25°C - preserves accuracy in high-impedance sensor interfaces and sample-hold circuits |
| Supply range | +2V to +12V single or ±2V to ±6V dual - supports portable +3.3V systems and industrial ±5V rails |
| Logic thresholds | 0.8V low / 2.4V high at +5V supply - guarantees reliable interface with standard TTL and CMOS microcontrollers |
| Turn-on/off time | 100ns / 40ns typical at ±4.5V - suitable for multiplexing up to ~5MHz sampling in ADC front-ends |
Pinout & Package
MAX4521CPE is housed in a 16-pin plastic DIP (P16-1) package with 0.300" width, through-hole mounting, and industry-standard pin spacing. Pin 1 is NC (not connected), pins 2 and 5 are V− and GND respectively, pins 11 and 13 are V+ and N.C., and switches are arranged as four independent NC configurations with dedicated INx, COMx, and NCx terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | NC1–NC4 | Normally closed analog terminals - connect to signal path when INx = logic low; no internal connection at pin 1 |
| 2, 7, 10, 15 | COM1–COM4 | Common analog node - bidirectional signal path shared between NC and switch control logic |
| 3, 6, 14, 16 | IN1–IN4 | Digital control inputs - active-low logic controls NC closure; compatible with 0.8V/2.4V thresholds |
| 5 | GND | Digital ground reference - isolated from analog signal paths; required for logic-level translator biasing |
| 11 | V+ | Positive supply - powers internal logic and P-channel switches; internally tied to substrate |
| 2 | V− | Negative supply - powers N-channel switches and sets lower analog signal limit; connect to GND for single supply |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - essential for ±5V op-amp interfacing and unipolar/bipolar sensor conditioning |
| Low power consumption | <1µW quiescent - extends battery life in portable multimeters and handheld test gear |
| Pin compatibility | Footprint matches industry-standard DG211 - enables drop-in replacement in existing designs without PCB rework |
| ESD robustness | >2kV per Method 3015.7 - protects against handling damage and field-induced transients in manufacturing and deployment |
| TTL/CMOS logic compatibility | Guaranteed 0.8V/2.4V thresholds at +5V supply - eliminates need for level shifters when interfacing with FPGA or MCU GPIO |
Applications
| Battery-Operated Data Acquisition | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs in handheld environmental monitors. IC Role / Device Role / Timing Role: Quad NC analog switch routes sensor outputs to a single precision ADC input while maintaining high common-mode rejection. Use Value: 1nA off-leakage prevents bias current errors in >10MΩ sensor bridges; 100Ω RON minimizes gain drift across temperature. | Use Scenario: Selecting between redundant inertial measurement unit (IMU) analog outputs in flight control systems. IC Role / Device Role / Timing Role: Fault-tolerant signal selector that defaults to primary channel (NC state) and isolates backup on command. Use Value: <−90dB off-isolation at 100kHz blocks cross-channel coupling during rapid channel switching; ±6V rating supports aircraft 28V-derived analog rails. |
| Audio Signal Switching | Test Equipment Channel Multiplexing |
Use Scenario: Routing line-level stereo signals in professional audio mixers with mute/fade functionality. IC Role / Device Role / Timing Role: Low-distortion analog switch providing silent mute transitions via NC topology and controlled turn-on/off timing. Use Value: 12Ω RON flatness preserves frequency response flatness across 20Hz–20kHz; <0.1% THD at 1kHz ensures studio-grade fidelity. | Use Scenario: Scanning multiple DUTs in automated test equipment (ATE) with shared oscilloscope or DMM inputs. IC Role / Device Role / Timing Role: High-isolation multiplexer enabling sequential measurement of voltage, current, and resistance without crosstalk. Use Value: 4Ω RON matching ensures consistent calibration across all four channels; 2pF COM-off capacitance minimizes settling time in 100MS/s sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522CPE | Four normally open (NO) switches instead of NC; identical RON, leakage, and timing specs | Requires active-high enable for signal path closure - unsuitable for fail-safe default-closed systems | Select MAX4522CPE only when default-open behavior is required for safety or sequencing logic |
| DG211CJ | Higher 125Ω RON, 10nA off-leakage at +25°C, no guaranteed 2.7V operation, same DIP-16 pinout | Limited to +4.5V to +18V single supply; not specified for low-voltage battery operation | Choose DG211CJ for legacy industrial systems with +12V rails where ultra-low leakage is noncritical |
Compared with MAX4522CPE and DG211CJ, the MAX4521CPE uniquely provides NC default closure with 1nA off-leakage at +25°C and guaranteed +2.7V operation - making it optimal for battery-powered fault-tolerant signal routing where power loss must preserve signal path integrity.
Availability
MAX4521CPE is available at Aetrix Electronics and suitable for battery-operated equipment, data acquisition systems, and avionics signal routing requiring stable component supply and long-term obsolescence management.
Supply support for MAX4521CPE 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 U.S.-based 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 engineered for low-voltage, low-leakage analog signal switching in portable and precision instrumentation - emphasizing rail-to-rail operation, tight channel matching, and robust ESD tolerance in compact packages.
FAQ
What is the default switch state of MAX4521CPE?
The MAX4521CPE features four normally closed (NC) analog switches. When all INx inputs are logic low (≤0.8V), each switch connects its COMx terminal to its corresponding NCx terminal. This default-closed behavior ensures signal continuity during power-up, reset, or controller failure - a critical safety feature in medical and avionics monitoring systems using the MAX4521CPE.
Can MAX4521CPE operate from a single +3.3V supply?
Yes, the MAX4521CPE is fully specified for single +2.7V operation. With V− tied to GND and V+ = +3.3V, it delivers 260Ω typical on-resistance, 1.6V/2.4V logic thresholds, and 1nA COM-off leakage at +25°C. This makes the MAX4521CPE suitable for modern low-power microcontroller-based data loggers where +3.3V is the primary system rail.
Does MAX4521CPE require external pull-up or pull-down resistors on its INx pins?
No, the MAX4521CPE has no internal pull resistors on INx pins and does not require external ones for basic operation. Its TTL/CMOS-compatible inputs (0.8V low / 2.4V high thresholds) interface directly with microcontroller GPIO. However, pull-down resistors may be added to ensure defined logic-low states during MCU reset - a design choice dependent on system-level fault tolerance requirements for the MAX4521CPE.
How does the on-resistance of MAX4521CPE vary with signal voltage?
The MAX4521CPE exhibits ≤12Ω on-resistance flatness over the full ±4.5V analog signal range with ±5V supplies, meaning RON changes by no more than 12Ω as the signal swings from −4.5V to +4.5V. This flatness - confirmed in Figure TOC01 and TOC02 of the datasheet - ensures minimal harmonic distortion and consistent gain in audio and instrumentation applications using the MAX4521CPE.
Is MAX4521CPE pin-compatible with DG211 devices?
Yes, the MAX4521CPE is explicitly designed as a pin-compatible upgrade to the DG211 series in 16-pin DIP packaging. Pin assignments for INx, COMx, NCx/NOx, V+, V−, GND, and N.C. match exactly, allowing direct replacement without PCB modification. This compatibility is documented in the "Pin Compatible with Industry-Standard DG211/DG212/DG213" feature list for the MAX4521CPE.
MAX4521CPE 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX4521CPE FAQ
1.How can I place an order for MAX4521CPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521CPE 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 MAX4521CPE reliable?
The price and inventory of MAX4521CPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521CPE is usually 5 days.
3.What payment methods are accepted for MAX4521CPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521CPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521CPE?
MAX4521CPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521CPE 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 MAX4521CPE?
For technical support, including MAX4521CPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521CPE requirements.
6.How does Aetrix verify that MAX4521CPE is sourced from the original manufacturer or authorized distributors?
All MAX4521CPE 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 MAX4521CPE meets industry standards.
7.What is the process for return or replacement of MAX4521CPE?
All MAX4521CPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521CPE, 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 MAX4521CPE part is unused and in its original packaging.
Return procedure for MAX4521CPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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