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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:2,240
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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 push-pull outputs, and ultra-low 4µA max supply current over 0°C to +70°C. It operates from single +2.5V to +11V or dual ±1.25V to ±5.5V supplies, with input common-mode range extending from V− to (V+ − 1.3V), making it ideal for battery-powered threshold detection and window comparator circuits.
For engineers reviewing the MAX933CUA-T datasheet, MAX933CUA-T pinout, MAX933CUA-T application, or MAX933CUA-T equivalent, key selection criteria include its dual-comparator architecture, internal reference accuracy, hysteresis configurability without external feedback, and µMAX-8 package compatibility with space-constrained portable systems.
Technical Context
The MAX933CUA-T integrates two independent comparators sharing a single internal 1.182V reference and one HYST pin for simultaneous hysteresis programming across both channels. Its output stage continuously sources up to 40mA and sinks ≥5mA while eliminating crowbar current during transitions-critical for stable operation in noisy or high-impedance layouts.
Input offset voltage is ±10mV (TYP), input leakage is ±0.01nA (IN+/IN−), and propagation delay is 12µs at 10mV overdrive. The device supports rail-to-rail input operation down to the negative supply rail and maintains functionality with supply voltages as low as 2.5V (single) or ±1.25V (dual).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single) or ±1.25V to ±5.5V (dual); enables direct interface with 3V/5V logic and bipolar sensor signals. |
| Quiescent Current | <4µA max over 0°C to +70°C; extends battery life in always-on monitoring applications. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C); stable internal reference eliminates need for external precision voltage source. |
| Propagation Delay | 12µs at 10mV overdrive; balances speed and power for low-frequency threshold detection. |
| Output Drive | 40mA continuous source / ≥5mA sink; directly drives LEDs, small relays, or logic inputs without buffer stages. |
| Input Common-Mode Range | V− to (V+ − 1.3V); supports sensing near ground or high-side signals in single-supply systems. |
| Hysteresis Control | Programmable via HYST pin (REF to REF − 50mV); enables precise noise immunity tuning with two resistors. |
Pinout & Package
MAX933CUA-T is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with SO-8 and PDIP-8 variants. The package supports reflow soldering and offers thermal performance suitable for industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUTA | Comparator A output | Push-pull TTL/CMOS-compatible output swinging from V+ to V−; sinks and sources current without external pull-up. |
| 2 V− | Negative supply | Connect to GND for single-supply operation; defines reference point for REF and input common-mode range. |
| 3 INA+ | Noninverting input A | High-impedance input (±0.01nA leakage); accepts signals from V− to (V+ − 1.3V). |
| 4 INB− | Inverting input B | Second comparator's inverting input; electrically identical to INA− but dedicated to channel B. |
| 5 INB+ | Noninverting input B | Independent high-Z input for comparator B; enables dual-threshold or window detection topologies. |
| 6 HYST | Hysteresis control | Accepts voltage from REF to (REF − 50mV); sets hysteresis band width via resistor divider to reduce noise-induced chatter. |
| 7 REF | Internal reference output | 1.182V ±2% referenced to V−; capable of sourcing 15µA/sinking 8µA; must not be bypassed. |
| 8 V+ | Positive supply | Accepts +2.5V to +11V (single) or connects to positive rail in dual-supply mode; powers both comparators and reference. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | <4µA max over full commercial temperature range-enables multi-year operation on coin-cell batteries. |
| Integrated 1.182V ±2% reference | Eliminates external reference IC or resistor divider, reducing BOM count and layout area in compact designs. |
| HYST pin for dual-channel hysteresis | Single-point hysteresis configuration applies identically to both comparators-simplifies design vs. discrete feedback networks. |
| No crowbar switching current | Prevents supply-line glitches during output transitions, improving system stability without mandatory bypass capacitors. |
| 40mA continuous output source | Drives LEDs, optocouplers, or logic gates directly-removes need for external driver transistors in low-power interfaces. |
Applications
| Battery-Powered Threshold Detector | Window Comparator (Undervoltage/Overvoltage) |
|---|---|
|
Use Scenario: Monitoring lithium-ion cell voltage to trigger low-battery warning or shutdown before deep discharge. IC Role / Device Role: Dual comparator compares sensed voltage against upper (overvoltage) and lower (undervoltage) thresholds derived from internal REF. Use Value: Eliminates external reference and reduces component count by 3–4 parts versus discrete solutions, while maintaining ±2% trip accuracy over temperature. |
Use Scenario: Validating regulated 5V supply integrity in portable medical devices where brownout or overvoltage must halt operation. IC Role / Device Role: MAX933CUA-T implements active-low undervoltage (OUTA) and overvoltage (OUTB) flags using resistor-divider thresholds and shared HYST pin. Use Value: Programmable hysteresis prevents output oscillation near trip points, ensuring clean power-good assertion without software debouncing. |
| Oscillator Circuit (Relaxation) | Alarm Circuit with Hysteresis |
|
Use Scenario: Generating low-frequency clock signals (e.g., 1–10Hz) for LED blinkers or status indicators in energy-harvesting sensors. IC Role / Device Role: One comparator acts as Schmitt trigger with RC network and HYST-controlled thresholds; second comparator unused or repurposed. Use Value: Internal reference and hysteresis eliminate timing drift from supply variation-frequency stability depends only on passive R/C tolerances. |
Use Scenario: Detecting smoke detector sensor output crossing alarm threshold while rejecting EMI-induced false triggers. IC Role / Device Role: Single comparator channel compares analog sensor output to REF-derived threshold; HYST pin sets 20–100mV hysteresis band. Use Value: 4µA quiescent current ensures >5-year standby life on AA batteries; ±10mV offset ensures predictable trip point calibration. |
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 |
|---|---|---|---|
| MAX923CUA-T | 1% reference accuracy (vs. 2%), same pinout and µMAX-8 package; higher supply current (5µA typ). | Required where tighter threshold tolerance is critical (e.g., precision power sequencing), but increases quiescent load. | Select MAX923CUA-T when reference accuracy dominates over battery life; verify layout compatibility with identical footprint. |
| TLV3702IDR | No internal reference; rail-to-rail I/O; 1.8V–16V supply; 1.2µA quiescent current; SOT-23-8 package. | Suitable for ultra-low-power designs needing only comparator function-requires external reference or resistor divider for threshold setting. | Choose TLV3702IDR when minimizing supply current is paramount and reference can be sourced externally or from system rail. |
Compared with MAX933CUA-T, MAX923CUA-T trades 1µA higher quiescent current for ±1% reference accuracy, while TLV3702IDR reduces supply current by ~70% but removes integrated reference-making MAX933CUA-T optimal for balanced cost, size, and self-contained functionality in battery-critical systems.
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 with guaranteed long-term availability.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX931–MAX934 family was designed for ultra-low-power sensing and decision-making in portable and energy-constrained systems, combining micropower operation with integrated reference and robust output drive.
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 its ordering suffix "C" (MAX933CUA-T) and supported by electrical characteristics tables covering TMIN to TMAX within that range. It is not rated for extended or automotive temperature grades.
Does the MAX933CUA-T require external components to use the internal reference?
No, the MAX933CUA-T provides a fully functional 1.182V ±2% reference at the REF pin without external components. However, the REF pin must not be bypassed with capacitors, as stated in the datasheet. Load currents should remain within ±15µA source / ±8µA sink limits to maintain accuracy.
Can the MAX933CUA-T operate from a 3V single supply?
Yes, the MAX933CUA-T supports single-supply operation from +2.5V to +11V, including 3V. At 3V, typical supply current is 2.4–3.0µA (depending on temperature), input common-mode range extends from V− (GND) to 1.7V, and propagation delay increases slightly to ~14µs at 10mV overdrive.
How is hysteresis configured on the MAX933CUA-T?
Hysteresis is configured using the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band (VHB) ≈ 2 × (VREF − VHYST), with VHYST adjustable from REF down to (REF − 50mV). This method applies identical hysteresis to both comparators simultaneously.
Is the MAX933CUA-T pin-compatible with other devices in the MAX93x family?
Yes-the MAX933CUA-T is pin-compatible with the MAX923CUA-T (1% reference variant) and shares the same µMAX-8 pinout as MAX932CUA-T and MAX931CUA-T. However, it is not pin-compatible with MAX934 (16-pin) or MAX922 (different pin mapping), as explicitly noted in the datasheet.
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:
- Obsolete
- 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.
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