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Analog Devices Inc./Maxim Integrated MAX923ESA-T
- Part No.:
- MAX923ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX923ESA-T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,040
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Product details
Overview
MAX923ESA-T from Maxim Integrated is a dual, micropower, low-voltage comparator with internal 1.182V ±1% bandgap reference, programmable hysteresis via HYST pin, and TTL/CMOS-compatible outputs that source/sink current. It operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual supply), features 4.5μA max quiescent current over –40°C to +85°C, and supports threshold detection in battery-powered systems.
For engineers reviewing the MAX923ESA-T datasheet, MAX923ESA-T pinout, MAX923ESA-T application, or MAX923ESA-T equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-comparator use cases in window detectors and auto-off power switches, and two technically documented alternative parts for design flexibility.
Technical Context
The MAX923ESA-T integrates two independent comparators sharing a common internal reference and hysteresis control path. Its HYST pin enables adjustable hysteresis without external feedback-voltage between REF and HYST sets symmetric upper/lower thresholds, with max 100mV hysteresis band. Both comparators exhibit rail-to-rail input range (V− to V+ − 1.3V) and output swing from V+ to V−.
It uses a unique output stage that continuously sources up to 40mA while eliminating crowbar current during transitions, minimizing parasitic supply feedback. Propagation delay is 12μs (typ, 10mV overdrive) and input offset voltage is ±10mV, enabling stable operation in low-noise, low-power sensing circuits.
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 direct interface with 3V/5V logic and bipolar sensor signals. |
| Quiescent Current | ≤ 6μA over –40°C to +85°C - enables multi-year operation on coin-cell batteries in remote sensors. |
| Reference Voltage | 1.182V ±1% (E-temp range) referenced to V− - provides stable, factory-trimmed threshold anchor for both comparators. |
| Propagation Delay | 12μs (typ, 10mV overdrive) - ensures timely response in timing-critical window detection and oscillator circuits. |
| Input Offset Voltage | ±10mV - defines minimum detectable differential signal without calibration. |
| Output Drive | Sources ≥40mA continuously, sinks ≥5mA - directly drives LEDs, MOSFET gates, or logic inputs without external buffers. |
| Hysteresis Control | HYST pin accepts 0–50mV below REF - enables precise, resistor-programmable hysteresis band (up to 100mV) shared by both comparators. |
Pinout & Package
MAX923ESA-T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.75mm height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; connects to V− for single-supply operation; output swings from V+ to V−. |
| 2 | V− | Negative supply rail; tied to GND in single-supply mode; defines reference point for REF and input common-mode range. |
| 3 | IN+ | Noninverting input of Comparator A - accepts signals from V− to V+ − 1.3V. |
| 4 | IN− | Inverting input of Comparator A - matched to IN+ for precision differential sensing. |
| 5 | INB− | Inverting input of Comparator B - electrically isolated from Comparator A; same input voltage range. |
| 6 | HYST | Hysteresis control input - voltage relative to REF sets symmetric hysteresis band for both comparators. |
| 7 | REF | 1.182V ±1% bandgap reference output - sourced from V−, not GND; supplies stable threshold for both comparators. |
| 8 | V+ | Positive supply rail - supports up to +11V; powers internal reference and output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator with shared reference | Reduces component count and layout area in window detectors and dual-threshold monitoring. |
| Programmable hysteresis via HYST pin | Eliminates need for external positive-feedback resistors; enables fast, low-current hysteresis tuning with two resistors. |
| Rail-to-rail input range | Accepts inputs from V− to V+ − 1.3V - supports direct connection to battery rails or sensor outputs near supply limits. |
| 40mA continuous output source current | Drives LEDs, small relays, or MOSFET gates directly - avoids external driver stages in portable equipment. |
| No crowbar current during switching | Prevents supply-line glitches and parasitic feedback - improves stability in poorly decoupled or high-impedance PCB layouts. |
Applications
| Window Detector | Auto-Off Power Switch |
|---|---|
Use Scenario: Monitoring DC supply voltage (e.g., 4.5V–5.5V) to assert "power good" only when within safe operating range. IC Role / Device Role / Timing Role: Dual comparator implements undervoltage (OUTA) and overvoltage (OUTB) detection with shared REF and HYST-controlled hysteresis. Use Value: Eliminates external reference and reduces resistor count vs. discrete solutions; ±5mV hysteresis at input prevents chatter near thresholds. |
Use Scenario: Enabling timed shutdown of a 40mA load after button press, extending battery life in handheld instruments. IC Role / Device Role / Timing Role: Comparator A acts as threshold detector triggering RC timer; output drives P-channel MOSFET gate directly. Use Value: 3.5μA quiescent current and 40mA source capability enable self-contained, ultra-low-power switch without auxiliary regulators. |
| Oscillator Circuit | Level-Shifting Interface |
Use Scenario: Building relaxation oscillator for LED blink or system wake-up timing using hysteresis and RC network. IC Role / Device Role / Timing Role: Comparator A forms hysteresis-based Schmitt trigger; REF and HYST set trip points; output charges/discharges capacitor. Use Value: Internal reference and programmable HYST eliminate external voltage dividers; 12μs propagation delay enables ~10kHz max frequency. |
Use Scenario: Converting ±5V industrial sensor outputs to 0V/5V TTL logic levels for microcontroller input. IC Role / Device Role / Timing Role: Comparator A compares VIN against REF (1.182V); V− tied to –5V enables full bipolar input range. Use Value: Input range includes V− allows direct ±5V interface; output swing to V− ensures clean low-level signaling without level translators. |
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 |
|---|---|---|---|
| MAX923CSA | Same functionality and pinout; commercial temp range (0°C to +70°C) vs. extended (–40°C to +85°C) for MAX923ESA-T. | Not rated for automotive or industrial ambient extremes; unsuitable where cold-start or high-temperature operation required. | Select MAX923CSA only for cost-sensitive consumer applications within 0°C–70°C ambient. |
| TLV3702IDR | Single-supply only (2.7V–16V); no internal reference; rail-to-rail I/O; 1.2μA quiescent current; 350ns propagation delay. | Requires external reference and hysteresis circuitry; faster but less integrated; lower power but higher design complexity. | Choose TLV3702IDR when ultra-low power (<2μA) and speed (<1μs) outweigh integration needs and reference stability. |
Compared with MAX923CSA, MAX923ESA-T adds guaranteed operation down to –40°C and extends reliability in harsh environments; compared with TLV3702IDR, it trades raw speed and quiescent current for built-in reference, hysteresis control, and simplified bill-of-materials in threshold-monitoring designs.
Availability
MAX923ESA-T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors, and window comparators requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for MAX923ESA-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, sensing, and interface applications in industrial, medical, and communications systems.
The MAX921–MAX924 family was engineered for ultra-low-power threshold detection in space- and energy-constrained systems, emphasizing micropower operation, integrated references, and robust output drive without external components.
FAQ
What is the maximum hysteresis bandwidth achievable with MAX923ESA-T?
The MAX923ESA-T achieves a maximum hysteresis bandwidth of 100mV, derived from the 50mV voltage range allowed on the HYST pin (REF − 0.05V to REF). This sets symmetric upper and lower thresholds around the reference, enabling reliable noise immunity in noisy environments. The actual hysteresis at the input depends on external resistor ratios, but the MAX923ESA-T's HYST architecture guarantees ≤100mV total band without external feedback components.
Can MAX923ESA-T operate from a single 3V supply?
Yes, MAX923ESA-T operates from a single +2.5V to +11V supply, including +3V. At 3V, typical supply current is 4.3μA (E-temp range), input common-mode range spans 0V to 1.7V, and output swing remains from V+ to V− (i.e., 3V to 0V). Reference accuracy holds at ±1.206V over –40°C to +85°C, supporting stable 3V-system threshold detection.
Does MAX923ESA-T require external bypass capacitors?
No external bypass capacitors are required for MAX923ESA-T if the supply impedance is low. However, a 100nF ceramic capacitor placed close to the V+ and GND pins is recommended when supply leads are long or impedance is high. The internal reference (REF) must never be bypassed - doing so degrades noise performance and may cause instability due to crosstalk.
How does the HYST pin function in MAX923ESA-T?
The HYST pin on MAX923ESA-T accepts a voltage between REF − 0.05V and REF to program symmetric hysteresis for both comparators. A resistor divider from REF to V− sets this voltage; the difference (REF − VHYST) determines half the hysteresis band. For example, 25mV difference yields ~50mV total hysteresis. This eliminates external feedback networks and ensures matched hysteresis across both channels.
Is MAX923ESA-T pin-compatible with other MAX92x variants?
MAX923ESA-T is pin-compatible with MAX923CPA, MAX923CSA, and MAX923CUA - all share identical 8-pin SO, DIP, and μMAX pinouts. It is not pin-compatible with MAX921 or MAX922 due to differing pin assignments (e.g., MAX922 lacks REF and HYST pins). Always verify pin functions per device datasheet; MAX923ESA-T pin 6 is HYST, whereas MAX922 pin 6 is INB+.
MAX923ESA-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:
- 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):
- 50mA
- Current - Output (Typ):
- 7.5µA
- 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
MAX923ESA-T FAQ
1.How can I place an order for MAX923ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923ESA-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 MAX923ESA-T reliable?
The price and inventory of MAX923ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923ESA-T is usually 5 days.
3.What payment methods are accepted for MAX923ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923ESA-T?
MAX923ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923ESA-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 MAX923ESA-T?
For technical support, including MAX923ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923ESA-T requirements.
6.How does Aetrix verify that MAX923ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX923ESA-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 MAX923ESA-T meets industry standards.
7.What is the process for return or replacement of MAX923ESA-T?
All MAX923ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX923ESA-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 MAX923ESA-T part is unused and in its original packaging.
Return procedure for MAX923ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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