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Analog Devices Inc./Maxim Integrated MAX933ESA+
- Part No.:
- MAX933ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX933ESA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:817
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Product details
Overview
MAX933ESA+ from Maxim Integrated is a dual micropower 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 monitoring where ultra-low quiescent current (<4µA over temperature) and rail-to-rail input range (V− to V+ −1.3V) are critical.
For engineers reviewing the MAX933ESA+ datasheet, MAX933ESA+ pinout, MAX933ESA+ application, or MAX933ESA+ equivalent, this page delivers verified electrical parameters, package-specific terminal roles, real-world use cases in undervoltage/overvoltage detection, and validated alternative options for low-power comparator selection.
Technical Context
The MAX933ESA+ integrates two independent comparators sharing one internal 1.182V reference and a dedicated HYST pin for resistor-programmable hysteresis without external feedback. Its output stage eliminates crowbar current during transitions, preventing supply glitches and parasitic feedback-enabling stable operation even with suboptimal PCB layout.
Input common-mode range extends from V− to V+ −1.3V; output swings from V+ to V− (dual-supply mode) or V+ to GND (single-supply mode when V− = GND). Propagation delay is 12µs typical at 10mV overdrive, and voltage noise is 20µVRMS (100Hz–100kHz) under 5V operation.
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 3V systems and industrial 5V/±5V rails. |
| Quiescent Current | <4µA over extended temperature - enables multi-year operation on coin-cell batteries in always-on monitoring circuits. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C) - provides stable, factory-trimmed threshold source without external components. |
| Propagation Delay | 12µs typical at 10mV overdrive - ensures timely response in fast-acting alarm or oscillator applications. |
| Output Drive | Sources 40mA continuously; sinks >5mA - directly drives LEDs, small relays, or logic inputs without buffer stages. |
| Input Common-Mode Range | V− to V+ −1.3V - allows sensing signals near ground or rail in single-supply configurations. |
| Reference Load Capability | Sinks 8µA / sources 15µA - sufficient to bias hysteresis resistors while maintaining accuracy. |
Pinout & Package
MAX933ESA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), rated for 0°C to +70°C operation. The µMAX package offers space-constrained PCB layouts while maintaining thermal performance suitable for low-power embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output; sinks and sources current; swings from V+ to V− - enables bipolar signal monitoring in dual-supply mode. |
| 2 | V+ | Positive supply input - accepts +2.5V to +11V (single) or ±1.25V to ±5.5V (dual) supply rails. |
| 3 | REF | 1.182V reference output referenced to V− - used as precision threshold source or hysteresis bias point. |
| 4 | HYST | Hysteresis control input; range = REF to REF −50mV - sets hysteresis band width (up to 100mV) using two external resistors. |
| 5 | INB− | Inverting input of comparator B - forms one half of differential threshold comparison with INB+. |
| 6 | INB+ | Noninverting input of comparator B - accepts input signals within V− to V+ −1.3V common-mode range. |
| 7 | V− | Negative supply - connect to GND for single-supply operation; defines reference and output swing baseline. |
| 8 | OUTA | Comparator A output; sinks and sources current; swings from V+ to V− - independent output channel for dual-threshold functions. |
Key Features
| Feature | Design Value |
|---|---|
| No crowbar output switching | Eliminates supply-line transients during output transitions - reduces need for heavy bypassing and improves system stability. |
| Programmable hysteresis via HYST pin | Enables precise, resistor-set hysteresis (up to 100mV band) without external feedback networks - simplifies design and saves board area. |
| Rail-to-rail input capability | Accepts inputs from V− to V+ −1.3V - supports direct sensing of ground-referenced or high-side signals in low-voltage systems. |
| 40mA continuous output source | Drives LEDs, logic gates, or small loads directly - avoids external driver ICs and reduces BOM count in portable instrumentation. |
| Ultra-low 4µA max supply current | Extends battery life in always-on applications such as smoke detectors or remote sensors - validated across full temperature range. |
Applications
| Window Detector | Auto-Off Power Switch |
|---|---|
|
Use Scenario: Monitoring DC power supply for undervoltage (e.g., 4.5V) and overvoltage (e.g., 5.5V) faults in microcontroller-based systems. IC Role / Device Role / Timing Role: Dual comparator performing simultaneous high/low threshold comparison; REF provides common reference; HYST adds noise immunity. Use Value: Generates independent active-low UV and OV flags; ANDed output yields clean "power-good" signal - eliminates external voltage dividers and discrete references. |
Use Scenario: Enabling timed shutdown of auxiliary circuitry after button press in handheld medical devices or IoT sensors. IC Role / Device Role / Timing Role: Comparator acts as auto-resettable timer trigger; RC network on HYST sets timeout; OUTA controls MOSFET gate. Use Value: Draws only 3.5µA quiescent current during standby; high-current output directly drives load switch - no additional driver needed. |
| Bar-Graph Level Gauge | Two-Stage Low-Voltage Detector |
|
Use Scenario: Visual battery charge indication using four LEDs in portable test equipment or battery packs. IC Role / Device Role / Timing Role: Four-stage threshold detector using cascaded resistor divider and MAX933ESA+'s dual comparators with shared REF. Use Value: High 40mA output drive powers LEDs directly; internal reference ensures consistent thresholds across temperature - no calibration required. |
Use Scenario: Detecting progressive brownout conditions in automotive body control modules before system reset. IC Role / Device Role / Timing Role: Dual comparator monitors same input with staggered thresholds (e.g., FAIL at 3.0V, LOW at 3.6V); outputs indicate severity level. Use Value: Enables tiered response (e.g., warning → shutdown); programmable hysteresis prevents chatter near trip points - improves reliability in noisy environments. |
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 |
|---|---|---|---|
| MAX923ESA+ | 1% reference accuracy (vs. 2%); identical pinout and package; same 4µA quiescent current and 40mA output drive. | Better suited for precision thresholding (e.g., data acquisition front-ends) where ±10mV reference error is unacceptable. | Select MAX923ESA+ when reference accuracy dominates over cost; otherwise MAX933ESA+ offers optimal balance for general-purpose monitoring. |
| TLV3702IDR | Lower quiescent current (1.6µA), no internal reference, rail-to-rail I/O, but only 10mA output drive and no HYST pin. | Requires external reference and hysteresis circuitry; better for ultra-low-power sensor nodes where reference is already available. | Choose TLV3702IDR only if system-level reference exists and <2µA supply current is mandatory; MAX933ESA+ integrates reference and hysteresis control. |
Compared with MAX923ESA+, MAX933ESA+ trades 1% reference accuracy for lower cost and identical functionality in non-critical thresholding. Against TLV3702IDR, MAX933ESA+ delivers higher output drive and built-in hysteresis control at the expense of slightly higher quiescent current - making it superior for self-contained, low-component-count designs.
Availability
MAX933ESA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply with guaranteed 0°C to +70°C operation and µMAX footprint compatibility.
Supply support for MAX933ESA+ 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 and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX931–MAX934 family was engineered specifically for ultra-low-power, low-cost comparator applications requiring integrated reference and hysteresis control - targeting portable instrumentation, battery monitoring, and fault-detection subsystems.
FAQ
What is the operating temperature range for MAX933ESA+?
The MAX933ESA+ is specified for 0°C to +70°C operation. This commercial-grade temperature range aligns with its 8-pin µMAX package and is documented in the Ordering Information table. For extended-range alternatives, the MAX933ESE+ (−40°C to +85°C) in SO package is available, but MAX933ESA+ itself is not rated beyond +70°C.
Does MAX933ESA+ support dual-supply operation?
Yes, MAX933ESA+ supports dual-supply operation from ±1.25V to ±5.5V. In this configuration, V− serves as the negative rail and V+ as the positive rail; outputs swing from V+ to V−, and the internal reference remains referenced to V−. This enables bipolar input monitoring in applications like level shifting or AC signal detection.
Can MAX933ESA+ drive LEDs directly?
Yes, MAX933ESA+ can drive LEDs directly due to its 40mA continuous output source capability. Each comparator output (OUTA/OUTB) sustains this current without external buffering, making it suitable for bar-graph indicators or status lights in low-power portable devices - confirmed by Typical Operating Characteristics showing VOH vs. load current curves.
How is hysteresis implemented on MAX933ESA+?
Hysteresis on MAX933ESA+ is implemented via the HYST pin: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band equals twice (REF − VHYST), adjustable up to 100mV. This method requires no external feedback and is explicitly detailed in the Applications Information section for MAX933.
Is MAX933ESA+ pin-compatible with any 1% reference comparators?
Yes, MAX933ESA+ is pin-compatible with MAX923ESA+ (1% reference version), as stated in the datasheet: "The MAX933 and MAX923 are pin-compatible." Both share identical 8-pin µMAX packaging, pin assignments, and electrical interface - enabling drop-in replacement where higher reference accuracy is required.
MAX933ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX933ESA+ FAQ
1.How can I place an order for MAX933ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX933ESA+ 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 MAX933ESA+ reliable?
The price and inventory of MAX933ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX933ESA+ is usually 5 days.
3.What payment methods are accepted for MAX933ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX933ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX933ESA+?
MAX933ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX933ESA+ 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 MAX933ESA+?
For technical support, including MAX933ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX933ESA+ requirements.
6.How does Aetrix verify that MAX933ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX933ESA+ 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 MAX933ESA+ meets industry standards.
7.What is the process for return or replacement of MAX933ESA+?
All MAX933ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX933ESA+, 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 MAX933ESA+ part is unused and in its original packaging.
Return procedure for MAX933ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX933ESA+ Tags
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LM2903DR
Texas Instruments
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LM339DR
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LM339PWR
Texas Instruments
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LM393DT
STMicroelectronics
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LM2901PWR
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LM2903DT
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LM393DR
Texas Instruments
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP USA Inc.
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