My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX933CUA+T
- Part No.:
- MAX933CUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX933CUA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,819
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX933CUA+T from Maxim Integrated is a dual micropower voltage comparator with integrated 1.182V ±2% bandgap reference, programmable hysteresis via HYST pin, TTL/CMOS-compatible outputs sourcing up to 40mA, and operation from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply). It targets battery-powered threshold detection and window-comparator circuits requiring ultra-low quiescent current (≤4µA over temperature) and rail-to-rail input range down to V−.
For engineers reviewing the MAX933CUA+T datasheet, MAX933CUA+T pinout, MAX933CUA+T application, or MAX933CUA+T equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-comparator use cases in undervoltage/overvoltage monitoring, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The MAX933CUA+T integrates two independent comparators sharing one internal 1.182V reference and a dedicated HYST terminal for resistor-programmable hysteresis without external feedback. Its output stage eliminates crowbar current during transitions, minimizing parasitic supply feedback and enabling stable operation without strict layout constraints.
Input common-mode range extends from V− to (V+ − 1.3V); outputs swing from V+ to V− (dual-supply mode) or V+ to GND (single-supply mode with V− = GND). Propagation delay is 12µs typical at 10mV overdrive, and supply current remains ≤4µA across 0°C to +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5.5V dual supply - supports both battery-powered and bipolar signal monitoring systems |
| Quiescent Supply Current | ≤4µA over 0°C to +70°C - enables multi-year operation on coin-cell batteries |
| Reference Voltage | 1.182V ±2% (0°C to +70°C) referenced to V− - provides stable trip point without external precision reference |
| Propagation Delay | 12µs typical at 10mV overdrive - ensures timely response in alarm and oscillator applications |
| Output Drive Capability | Sources ≥40mA continuously; sinks ≥5mA - directly drives LEDs, MOSFET gates, or logic inputs without buffering |
| Input Common-Mode Range | V− to (V+ − 1.3V) - allows direct sensing of signals near ground or rail in low-voltage systems |
| Hysteresis Control | HYST pin accepts 1.132V to 1.182V (REF − 50mV to REF) - enables precise 0–100mV hysteresis band using two resistors |
Pinout & Package
MAX933CUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), pin-compatible with SO and DIP variants. The package supports reflow soldering and offers thermal performance suitable for industrial ambient temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUTA | Comparator A output | Sinks and sources current; swings from V+ to V− - enables direct interface with bipolar logic or analog loads |
| 2 V− | Negative supply | Connect to GND for single-supply operation; defines reference for REF and input common-mode range |
| 3 INA+ | Noninverting input of comparator A | Accepts signals from V− to (V+ − 1.3V); high-impedance (±0.01nA leakage) minimizes loading |
| 4 INB− | Inverting input of comparator B | Paired with INB+ for second independent comparison channel; identical electrical specs to INA± |
| 5 INB+ | Noninverting input of comparator B | Enables dual-threshold detection (e.g., window comparator) with shared REF and HYST resources |
| 6 HYST | Hysteresis control input | Adjusts switching thresholds via resistor divider; voltage range 1.132V–1.182V sets 0–100mV hysteresis band |
| 7 REF | Internal reference output | 1.182V ±2% w.r.t. V−; sources ≤15µA/sinks ≥8µA - powers external dividers without external regulator |
| 8 V+ | Positive supply | Accepts +2.5V to +11V; supplies both comparators and reference - no separate bias rail required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤4µA over full commercial temperature range - extends battery life in portable sensors and wearables |
| Dual comparator + reference integration | Single 8-pin µMAX package replaces discrete op-amp + reference + resistors - reduces BOM count and PCB area |
| Programmable hysteresis without feedback | HYST pin enables precise, low-current hysteresis tuning - eliminates instability risk from external positive feedback loops |
| No crowbar output current | Eliminates supply glitches during output transitions - removes need for heavy supply bypassing in noise-sensitive designs |
| Rail-to-rail input capability | Inputs operate down to V− - allows direct monitoring of ground-referenced signals (e.g., battery voltage, sensor outputs) |
Applications
| Undervoltage Detection | Overvoltage Protection |
|---|---|
|
Use Scenario: Monitoring Li-ion battery voltage to trigger shutdown before deep discharge. IC Role / Device Role / Timing Role: Dual comparator configures as window detector: OUTA asserts low when VIN < 3.0V; OUTB asserts low when VIN > 4.2V. Use Value: Internal 1.182V reference and HYST pin enable accurate, low-power threshold setting without external components. |
Use Scenario: Safeguarding microcontroller I/O pins against supply surges in automotive body electronics. IC Role / Device Role / Timing Role: MAX933CUA+T compares regulated 5V rail against reference-derived thresholds; triggers latch-off circuit within 12µs. Use Value: 40mA source capability directly drives SCR gate or MOSFET, eliminating driver stage and reducing system latency. |
| Oscillator Circuits | Alarm Threshold Monitoring |
|
Use Scenario: Building low-power relaxation oscillator for periodic sensor wake-up in IoT endpoints. IC Role / Device Role / Timing Role: Comparator A forms hysteresis-based Schmitt trigger with RC network on HYST/REF; comparator B buffers output. Use Value: Programmable hysteresis and rail-to-rail inputs allow stable oscillation from 1Hz–10kHz using only passive components. |
Use Scenario: Detecting smoke detector sensor output crossing alarm threshold in battery-operated fire alarms. IC Role / Device Role / Timing Role: Single comparator channel compares ionization chamber current against reference-derived voltage; HYST suppresses noise-induced false triggers. Use Value: ≤4µA quiescent current ensures >5-year shelf life on AA batteries while maintaining fast 12µs response to real smoke events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX933CSA+ | Same electrical specs; 8-pin plastic DIP package (longer lead pitch, higher thermal resistance) | Preferred for through-hole prototyping or legacy board rework where µMAX footprint unavailable | Select when manual assembly, socketing, or thermal derating above 70°C is required |
| MAX923CUA+ | 1% reference accuracy (vs. 2%); otherwise pin- and function-compatible; same 4µA max supply current | Better suited for precision threshold applications (e.g., medical sensor interfaces) where ±10mV reference error is unacceptable | Choose when tighter reference tolerance justifies slightly higher cost and same µMAX footprint |
Compared with MAX933CUA+T, MAX933CSA+ offers identical functionality in a through-hole package for ease of hand-soldering but sacrifices thermal performance and board density; MAX923CUA+ delivers superior reference accuracy for metrology-critical designs while maintaining drop-in compatibility and ultra-low power.
Availability
MAX933CUA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature performance.
Supply support for MAX933CUA+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 industrial, automotive, and communications markets, with emphasis on low-power innovation.
The MAX931–MAX934 family was engineered specifically for ultra-low-power sensing and monitoring applications where micropower operation, integrated reference, and robust hysteresis control are essential - targeting portable instrumentation and energy-harvesting systems.
FAQ
What is the operating temperature range for the MAX933CUA+T?
The MAX933CUA+T is specified for the commercial temperature range of 0°C to +70°C. This is confirmed by the ordering information table listing "MAX933CUA" with "C" suffix denoting commercial grade, and by the Electrical Characteristics tables explicitly referencing "C temp. range" for all parametric data including supply current, reference voltage, and propagation delay.
Does the MAX933CUA+T require external hysteresis components?
No - the MAX933CUA+T includes a dedicated HYST pin enabling resistor-programmable hysteresis without external feedback networks. Connecting two resistors between REF, HYST, and V− sets a precise hysteresis band from 0mV to 100mV, as detailed in the Applications Information section and Typical Operating Circuit diagrams.
Can the MAX933CUA+T operate from a 3V supply?
Yes - the MAX933CUA+T operates from +2.5V to +11V single supply. Electrical Characteristics tables explicitly include "ELECTRICAL CHARACTERISTICS-3V Operation" with validated parameters including 2.4µA to 3.0µA supply current, ±10mV input offset, and 14µs response time, confirming full functionality at 3V.
What is the output voltage swing of the MAX933CUA+T?
In single-supply configuration (V− = GND), the MAX933CUA+T outputs swing from V+ to GND. In dual-supply mode, outputs swing from V+ to V−. This is confirmed by Pin Descriptions stating "OUTA/OUTB: Swings from V+ to V−" and Detailed Description noting "The MAX932 and MAX933 do not have a GND pin, and their outputs swing from V+ to V−."
Is the MAX933CUA+T pin-compatible with any other Maxim comparators?
Yes - the MAX933CUA+T is pin-compatible with the MAX923CUA+, which features a 1% reference instead of 2%. This is explicitly stated in the datasheet: "The MAX933 and MAX923 are pin-compatible." Both share identical 8-pin µMAX packaging and pinout, enabling direct substitution where higher reference accuracy is needed.
MAX933CUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 0.015mA @ 5V
- Current - Output (Typ):
- 6µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX933CUA+T FAQ
1.How can I place an order for MAX933CUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX933CUA+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 MAX933CUA+T reliable?
The price and inventory of MAX933CUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX933CUA+T is usually 5 days.
3.What payment methods are accepted for MAX933CUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX933CUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX933CUA+T?
MAX933CUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX933CUA+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 MAX933CUA+T?
For technical support, including MAX933CUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX933CUA+T requirements.
6.How does Aetrix verify that MAX933CUA+T is sourced from the original manufacturer or authorized distributors?
All MAX933CUA+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 MAX933CUA+T meets industry standards.
7.What is the process for return or replacement of MAX933CUA+T?
All MAX933CUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX933CUA+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 MAX933CUA+T part is unused and in its original packaging.
Return procedure for MAX933CUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX933CUA+T Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
