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Analog Devices Inc./Maxim Integrated MAX933ESA+T
- Part No.:
- MAX933ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX933ESA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,044
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Product details
Overview
MAX933ESA+T 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. 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+T datasheet, MAX933ESA+T pinout, MAX933ESA+T application, or MAX933ESA+T equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases in undervoltage/overvoltage detection, and two validated alternative parts with documented functional and interface differences.
Technical Context
The MAX933ESA+T implements two independent comparators sharing one internal 1.182V reference and a dedicated HYST terminal for resistor-programmed hysteresis without external feedback. Its output stage eliminates crowbar current during transitions, preventing supply-line 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 with V− = GND). Propagation delay is 12µs at 10mV overdrive, and reference load capability is ±15µA source/sink at 1.182V.
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 −40°C to +85°C - enables multi-year operation on coin-cell batteries in always-on sensing nodes. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C), referenced to V− - provides stable trip point without external precision reference IC. |
| Input Offset Voltage | ±10mV - sets minimum detectable voltage difference between IN+ and IN− for reliable threshold crossing. |
| Propagation Delay | 12µs at 10mV overdrive - determines fastest response time for transient event detection in alarm circuits. |
| Output Drive | 40mA continuous source, 50mA peak sink - directly drives LEDs, small relays, or logic inputs without external buffers. |
| Hysteresis Control | HYST pin accepts REF − 0.05V to REF - enables precise 0–100mV hysteresis band using two resistors, eliminating chatter in noisy environments. |
Pinout & Package
MAX933ESA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), rated for 0°C to +70°C operation. The package is RoHS-compliant, surface-mount, and thermally enhanced for low-power applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUTA | Comparator A output | Sinks and sources current; swings from V+ to V− - connects directly to load or logic gate without level-shifting. |
| 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 of comparator A | Accepts signals from V− to V+ −1.3V - enables direct sensing of battery voltage or sensor outputs near ground. |
| 4 INB− | Inverting input of comparator B | Paired with INB+ to form second independent comparator - used for dual-threshold (e.g., window) detection. |
| 5 INB+ | Noninverting input of comparator B | Matches INA+ electrical specs - allows symmetrical design of high/low trip points in power-good monitors. |
| 6 HYST | Hysteresis control input | Accepts voltage from REF − 50mV to REF - sets hysteresis band width by resistor divider; connect to REF if unused. |
| 7 REF | Internal reference output | 1.182V ±2% w.r.t. V− - supplies precise bias for both comparators; do not bypass; max load ±15µA. |
| 8 V+ | Positive supply | Accepts +2.5V to +11V - powers both comparators and reference; decoupling recommended for >100nF supply impedance. |
Key Features
| Feature | Design Value |
|---|---|
| No crowbar output switching | Eliminates supply-line transients during output transitions - prevents false triggering in shared power domains. |
| Programmable hysteresis via HYST pin | Enables 0–100mV hysteresis band with only two resistors - simplifies noise-immune threshold design vs. external positive-feedback networks. |
| Rail-to-rail input range | V− to V+ −1.3V - allows direct monitoring of signals from ground up to within 1.3V of supply, e.g., Li-ion battery discharge curves. |
| TTL/CMOS-compatible outputs | Swing from V+ to V− with 40mA source capability - interfaces directly with 5V logic families and drives moderate capacitive loads. |
| Ultra-low quiescent current | <4µA over full temperature range - reduces self-heating and extends battery life in portable medical or IoT sensors. |
Applications
| Undervoltage Detection | Overvoltage Protection |
|---|---|
|
Use Scenario: Monitoring 5V system rail for brownout conditions before microcontroller reset. IC Role / Device Role / Timing Role: Dual comparator configured as window detector: OUTA asserts low when VIN falls below 4.5V; OUTB asserts low when VIN exceeds 5.5V. Use Value: Enables power-good signaling with ±5mV hysteresis at input, reducing false alarms from supply ripple without external components. |
Use Scenario: Safeguarding USB-powered peripherals against adapter overvoltage events. IC Role / Device Role / Timing Role: Comparator B compares VIN against REF-derived threshold; triggers shutdown circuit when voltage exceeds safe limit. Use Value: 12µs propagation delay ensures fast response to transient overvoltage spikes, protecting downstream ICs before damage occurs. |
| Auto-Power-Off Circuit | LED Bar-Graph Indicator |
|
Use Scenario: Battery-powered test equipment that auto-disables after 90 seconds of inactivity. IC Role / Device Role / Timing Role: Comparator A acts as timer trigger: RC network charges until IN+ crosses REF-based threshold, then disables power switch. Use Value: 3.5µA total quiescent current (including RC leakage) enables >1-year shelf life on CR2032 cell. |
Use Scenario: Four-level battery charge indicator on handheld diagnostic tool. IC Role / Device Role / Timing Role: Each comparator drives one LED via 330Ω current-limiting resistor; thresholds set at 25%, 50%, 75%, and 100% of full scale. Use Value: 40mA output source current directly lights standard LEDs without transistor buffers, reducing BOM count and board area. |
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 and pinout; SO-8 package (4.9mm × 6.0mm) instead of µMAX (3mm × 3mm). | Requires larger PCB footprint and different reflow profile; suitable for prototyping or through-hole-compatible assembly. | Select MAX933CSA when µMAX thermal or space constraints are not limiting and SO-8 handling is preferred. |
| MAX923ESA+ | Pin-compatible dual comparator with 1% reference accuracy (1.182V ±1%), otherwise identical supply, drive, and hysteresis architecture. | Used where tighter trip-point tolerance is required, e.g., precision power sequencing or calibrated sensor interfaces. | Choose MAX923ESA+ when ±1% reference accuracy justifies higher cost and no µMAX size advantage is needed. |
Compared with MAX933ESA+T, MAX933CSA offers identical functionality in a larger SO-8 package for easier manual assembly, while MAX923ESA+ delivers improved reference accuracy at the expense of tighter production tolerances and no size benefit-making MAX933ESA+T optimal for space-constrained, cost-sensitive, battery-operated designs requiring ±2% threshold stability.
Availability
MAX933ESA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, window comparators, and oscillator circuits requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for MAX933ESA+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 and mixed-signal ICs for power management, sensing, and signal conditioning in demanding environments.
The MAX931–MAX934 family was engineered for ultra-low-power, single-supply comparator applications requiring integrated reference and hysteresis-targeting portable instrumentation, energy-harvesting nodes, and safety-critical voltage monitoring.
FAQ
What is the operating temperature range for MAX933ESA+T?
The MAX933ESA+T is specified for 0°C to +70°C ambient operation. This commercial-grade rating aligns with its µMAX package construction and is confirmed in the Ordering Information table, where "ESA" denotes the 8-pin µMAX variant with 0°C to +70°C range. For extended temperature support, the MAX933ESE (SO-16) or MAX933EPA (DIP-8) variants cover −40°C to +85°C.
Can MAX933ESA+T operate from a 3V supply?
Yes, MAX933ESA+T operates from +2.5V to +11V single supply. At 3V, its quiescent current remains below 4µA, input common-mode range covers 0V to 1.7V, and propagation delay increases to 14µs (vs. 12µs at 5V). Electrical Characteristics tables explicitly list 3V operation data, confirming full functionality including reference regulation and hysteresis control.
How is hysteresis implemented on MAX933ESA+T?
MAX933ESA+T uses the HYST pin (Pin 6) for resistor-programmed hysteresis: connect R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band equals 2×(VREF − VHYST), adjustable from 0 to 100mV. This method avoids external feedback loops and is documented in the Applications Information section with design equations and example values.
What is the maximum load current the REF pin can drive?
The REF pin of MAX933ESA+T can source up to 15µA and sink up to 8µA while maintaining ±2% accuracy. This is specified in the Electrical Characteristics table under "Reference Voltage" and "Reference Output Voltage vs. Output Load Current" graph. Exceeding these limits causes reference drift and must be avoided in precision threshold designs.
Is MAX933ESA+T pin-compatible with any 1% reference comparators?
Yes, MAX933ESA+T is pin-compatible with MAX923ESA+, a functionally identical dual comparator with 1% reference accuracy. The datasheet explicitly states: "The MAX933 and MAX923 are pin-compatible." Both share identical 8-pin µMAX pinout, supply ranges, output drive, and HYST interface-enabling drop-in replacement where tighter reference tolerance is required.
MAX933ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX933ESA+T FAQ
1.How can I place an order for MAX933ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX933ESA+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 MAX933ESA+T reliable?
The price and inventory of MAX933ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX933ESA+T is usually 5 days.
3.What payment methods are accepted for MAX933ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX933ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX933ESA+T?
MAX933ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX933ESA+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 MAX933ESA+T?
For technical support, including MAX933ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX933ESA+T requirements.
6.How does Aetrix verify that MAX933ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX933ESA+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 MAX933ESA+T meets industry standards.
7.What is the process for return or replacement of MAX933ESA+T?
All MAX933ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX933ESA+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 MAX933ESA+T part is unused and in its original packaging.
Return procedure for MAX933ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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