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Analog Devices Inc./Maxim Integrated MAX4521CUE+T
- Part No.:
- MAX4521CUE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4521CUE+T.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,952
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Product details
Overview
MAX4521CUE+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 front-ends. It features 100Ω max on-resistance, 4Ω max channel-to-channel on-resistance matching, and 1nA max off-leakage at +25°C. Operates from ±2V to ±6V dual supplies or +2V to +12V single supply - fully specified at +2.7V - and supports TTL/CMOS logic inputs with ±5V or +5V supply.
For engineers reviewing the MAX4521CUE+T datasheet, MAX4521CUE+T pinout, MAX4521CUE+T application, or MAX4521CUE+T equivalent, key selection criteria include NC-switch topology, TSSOP-16 package compatibility, rail-to-rail analog handling up to ±4.5V, low charge injection (1–5pC), and ESD robustness (>2kV per Method 3015.7).
Technical Context
The MAX4521CUE+T implements four independent CMOS SPST switches with normally closed configuration, each using paralleled N- and P-channel MOSFETs driven by phase-inverted gate signals derived from V+ and V−. Its analog path has no ground reference - signal range is strictly bounded by V+ and V−, with internal ESD diodes clamping any overvoltage.
Logic inputs are translated via on-chip level shifters to drive analog switches; thresholds (0.8V/2.4V) ensure TTL/CMOS compatibility across supply configurations. The device exhibits flat on-resistance (12Ω max variation over signal range) and matched RON (≤4Ω delta between channels), critical for multi-channel instrumentation and data acquisition where gain/offset tracking matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and voltage drop in low-level analog paths. |
| RON matching | ≤4Ω max difference between channels - enables precise channel-to-channel signal consistency in multiplexed systems. |
| Off-leakage current | 1nA max at +25°C - preserves high-impedance node integrity in battery-powered sensor interfaces and sample-hold circuits. |
| Analog signal range | Rail-to-rail: V− to V+ - supports full dynamic range of ±4.5V or 0V to +4.5V signals without clipping. |
| Charge injection | 1–5pC - limits voltage glitch on sampled capacitors, critical for ADC input conditioning and precision DAC output switching. |
| ESD protection | >2kV per Method 3015.7 - enhances reliability in handling-sensitive test equipment and portable instrumentation. |
| Supply range | +2.7V to +12V single or ±2V to ±6V dual - enables operation from Li-ion batteries (3.0–4.2V) or legacy ±5V rails. |
Pinout & Package
MAX4521CUE+T is housed in a 16-pin TSSOP (U16-2) package, 4.4mm body width, with exposed pad connected to V+. Pin 1 is NC (not internally connected); pins 2 and 5 are V− and GND respectively; pins 11 and 13 are V+ and NC; analog terminals occupy pins 1, 3, 4, 6–10, 12, 14–16 as defined below.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 (Pins 15,14,7,6) | Digital control input | Active-low logic controls NC switch state; 0V = ON (closed), V+ = OFF (open) - matches TTL/CMOS thresholds. |
| COM1–COM4 (Pins 16,13,8,5) | Analog common terminal | Switch output node; bidirectional - may serve as input or output depending on system topology. |
| NC1–NC4 (Pins 1,4,12,9) | Analog normally closed terminal | Connected to COM when IN = 0V; open when IN = V+ - provides fail-safe closed path during power loss or logic reset. |
| V+ (Pin 11) | Positive supply | Powers analog switches and internal logic; substrate tied to V+; exposed pad must be soldered to V+ for thermal and ESD performance. |
| V− (Pin 2) | Negative supply | Sets lower analog rail limit; connects to GND for single-supply use; reverse-biased ESD diodes clamp analog overvoltage. |
| GND (Pin 3) | Digital ground reference | Reference for logic inputs only; no analog signal reference - analog paths float between V+ and V−. |
| N.C. (Pin 10) | No connection | Not bonded or connected internally - must remain unconnected on PCB to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports signals from V− to V+ without distortion or clipping - essential for ±5V op-amp interfaces and audio line-level routing. |
| Low on-resistance flatness (12Ω max) | Minimizes THD and amplitude error across full signal swing - improves fidelity in data acquisition and test equipment signal chains. |
| Pin compatibility with DG211/DG212/DG213 | Enables drop-in replacement in legacy designs using industry-standard quad SPST switches - reduces redesign effort and qualification time. |
| Single +2.7V operation support | Validated down to 2.7V supply - allows direct integration with low-power microcontrollers and energy-harvesting systems. |
| Break-before-make isolation (MAX4523 only) | Not applicable - MAX4521CUE+T is NC-only; this feature is exclusive to MAX4523 variant and omitted here. |
Applications
| Battery-Powered Data Loggers | Avionics Signal Conditioning |
|---|---|
|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs into a shared 16-bit ADC in a portable environmental monitor. IC Role / Device Role / Timing Role: Quad NC switch routes analog sensors to ADC input while maintaining low leakage and matched RON to preserve measurement accuracy. Use Value: 1nA off-leakage prevents bias current errors in high-Z sensor nodes; 4Ω RON matching ensures consistent gain across channels. |
Use Scenario: Isolating redundant flight control sensor signals (e.g., airspeed, angle-of-attack) before feeding to fault-tolerant processing units. IC Role / Device Role / Timing Role: Normally closed configuration guarantees default signal continuity during power-up, reset, or logic failure - meeting DO-254 safety requirements. Use Value: Fail-safe NC behavior eliminates need for external pull-up/pull-down networks; >2kV ESD rating withstands aircraft static discharge events. |
| Audio Routing in Test Equipment | Industrial PLC Analog I/O Modules |
|
Use Scenario: Switching between calibration reference sources and DUT outputs in automated audio analyzer front-ends. IC Role / Device Role / Timing Role: Low charge injection (1–5pC) prevents audible pop/click artifacts during source switching in line-level audio paths. Use Value: Rail-to-rail operation handles ±2.5V reference signals without clipping; 100Ω RON introduces negligible insertion loss vs. 600Ω test loads. |
Use Scenario: Selecting between multiple 4–20mA transmitter inputs in a modular industrial controller with isolated analog inputs. IC Role / Device Role / Timing Role: Four independent NC switches isolate field wiring during module hot-swap or diagnostics - preventing cross-talk and ground loops. Use Value: Dual-supply capability (±5V) enables direct interfacing with isolated current-loop receivers; TSSOP-16 footprint fits dense I/O board layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522CUE+T | Four normally open (NO) switches instead of NC; identical RON, leakage, and supply specs. | Used where default-open safety state is required (e.g., disabling motor drives on power loss). | Select MAX4522CUE+T only if NO logic is mandatory; not pin-compatible due to swapped NC/NO pin assignments. |
| ADG1412BRUZ | Quad SPST, NO configuration; 1.8Ω typical RON at ±15V but 120Ω at ±5V; higher 25pC charge injection. | Targeted at high-voltage industrial automation; less suitable for low-voltage, low-leakage precision sensing. | Prefer MAX4521CUE+T for ≤±6V, <10nA leakage, and <5pC charge injection requirements - ADG1412BRUZ trades RON flatness for higher voltage rating. |
Compared with MAX4522CUE+T and ADG1412BRUZ, the MAX4521CUE+T uniquely delivers NC fail-safe behavior with sub-5pC charge injection and 1nA off-leakage at +25°C - making it optimal for battery-powered instrumentation and safety-critical signal routing where default continuity is required.
Availability
MAX4521CUE+T is available at Aetrix Electronics and suitable for battery-operated equipment, avionics signal conditioning, and industrial PLC analog I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4521CUE+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, automotive, and communications markets.
The MAX4521 family was designed specifically for low-voltage, precision analog switching in space-constrained, low-power systems - emphasizing rail-to-rail operation, tight RON matching, and robust ESD tolerance in TSSOP and QFN packages.
FAQ
What is the maximum analog signal voltage range supported by the MAX4521CUE+T?
The MAX4521CUE+T supports rail-to-rail analog signals from V− to V+. With ±5V dual supplies, this is ±4.5V; with +5V single supply (V− = GND), it is 0V to +4.5V. Signals exceeding V+ or V− are clamped by internal ESD diodes - design must ensure forward diode current stays within ±10mA continuous rating. The MAX4521CUE+T datasheet specifies absolute maximum analog voltage as (V− − 0.3V) to (V+ + 0.3V).
Is the MAX4521CUE+T pin-compatible with the DG211 analog switch?
Yes, the MAX4521CUE+T is explicitly pin-compatible with the industry-standard DG211, as confirmed in the "Features" section of the MAX4521/MAX4522/MAX4523 datasheet. Both use 16-pin DIP/SO/QSOP/TSSOP footprints with identical pin functions for IN, COM, NC, V+, V−, and GND. However, note that DG211 uses different internal topology and has higher RON (175Ω typical) and leakage - the MAX4521CUE+T offers superior performance while maintaining mechanical and electrical drop-in capability.
Does the MAX4521CUE+T require external pull-up or pull-down resistors on its digital inputs?
No, the MAX4521CUE+T does not require external pull-up or pull-down resistors. Its digital inputs have guaranteed TTL/CMOS-compatible thresholds (0.8V low, 2.4V high) when operated with ±5V or +5V supplies, and internal input current is limited to ±1µA. Driving directly from MCU GPIOs or logic gates is sufficient. External resistors are unnecessary unless noise immunity in high-EMI environments demands added hysteresis - which is not specified or required for standard operation of the MAX4521CUE+T.
Can the MAX4521CUE+T operate from a single +3.3V supply?
Yes, the MAX4521CUE+T is fully specified for single +2.7V operation and functions reliably at +3.3V. Electrical characteristics at +3.3V include 260Ω max RON, 0.8–1.6V logic low threshold, 1.6–2.4V logic high threshold, and 120–300ns turn-on time. All timing and leakage parameters remain valid - confirming suitability for modern low-voltage embedded systems powered by +3.3V rails. The MAX4521CUE+T maintains rail-to-rail analog range from 0V to +3.3V under this condition.
What is the thermal performance of the MAX4521CUE+T in TSSOP package?
The MAX4521CUE+T in TSSOP-16 (U16-2) has a power dissipation derating factor of 6.7mW/°C above +70°C, with 457mW maximum continuous dissipation at TA = +70°C. The exposed pad (EP) must be soldered to a V+-connected copper plane to achieve rated thermal performance. Junction-to-ambient θJA is approximately 149°C/W - meaning at 10mW static power (typical I+ + I−), junction temperature rise is ~1.5°C above ambient. This enables reliable operation in compact, sealed enclosures without forced airflow.
MAX4521CUE+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-TSSOP
MAX4521CUE+T FAQ
1.How can I place an order for MAX4521CUE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521CUE+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 MAX4521CUE+T reliable?
The price and inventory of MAX4521CUE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521CUE+T is usually 5 days.
3.What payment methods are accepted for MAX4521CUE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521CUE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521CUE+T?
MAX4521CUE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521CUE+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 MAX4521CUE+T?
For technical support, including MAX4521CUE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521CUE+T requirements.
6.How does Aetrix verify that MAX4521CUE+T is sourced from the original manufacturer or authorized distributors?
All MAX4521CUE+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 MAX4521CUE+T meets industry standards.
7.What is the process for return or replacement of MAX4521CUE+T?
All MAX4521CUE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521CUE+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 MAX4521CUE+T part is unused and in its original packaging.
Return procedure for MAX4521CUE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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