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Analog Devices Inc./Maxim Integrated MAX923CSA-T
- Part No.:
- MAX923CSA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX923CSA-T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,004
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Product details
Overview
The MAX923CSA-T from Maxim Integrated is a dual, micro-power comparator with internal 1.182V ±1% bandgap reference and programmable hysteresis via HYST pin. It operates from +2.5V to +11V single supply (or ±1.25V to ±5.5V dual), draws ≤6µA quiescent current over temperature, supports rail-to-rail input swing down to V− and within 1.3V of V+, and delivers TTL/CMOS-compatible outputs sourcing up to 40mA - ideal for battery-powered threshold detection in portable instrumentation.
For engineers reviewing the MAX923CSA-T datasheet, MAX923CSA-T pinout, MAX923CSA-T application, or MAX923CSA-T equivalent, key selection criteria include guaranteed hysteresis implementation without external feedback, ultra-low supply current across −40°C to +85°C, dual-comparator integration in SO-8 package, and output compatibility with both single-supply (V− = GND) and dual-supply configurations.
Technical Context
The MAX923CSA-T integrates two independent comparators sharing one internal reference and one HYST control node, enabling identical hysteresis on both channels using two external resistors. Its input stage accepts common-mode voltages from V− to (V+ − 1.3V), and its unique output architecture eliminates crowbar current during transitions, minimizing supply-line parasitic feedback.
Each comparator features <±10mV input offset voltage, <±5nA input leakage (C/E temp), 12µs propagation delay at 10mV overdrive, and output drive capable of sourcing 40mA continuously while maintaining sub-6µA quiescent current - a combination optimized for low-noise, low-power sensing in space-constrained industrial and medical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V single supply; ±1.25V to ±5.5V dual supply - enables direct interface with Li-ion batteries and bipolar sensor signals. |
| Quiescent Current | ≤6µA over −40°C to +85°C - ensures multi-year operation on coin-cell or energy-harvesting sources. |
| Reference Voltage | 1.182V ±1% (0°C to +70°C), referenced to V− - provides stable, factory-trimmed threshold for precision window detection. |
| Input Common-Mode Range | V− to (V+ − 1.3V) - supports ground-referenced inputs even at low supply voltages. |
| Propagation Delay | 12µs at 10mV overdrive - balances speed and power for battery-critical wake-up circuits. |
| 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) on both comparators simultaneously. |
Pinout & Package
MAX923CSA-T is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm, with standard JEDEC MS-012AC footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; connects to V− for single-supply operation; output swings from V+ to GND. |
| 2 | V− | Negative supply rail; tied to GND in single-supply mode; defines reference point for REF and input common-mode range. |
| 3 | INB− | Inverting input of comparator B; accepts voltages from V− to (V+ − 1.3V); <±5nA leakage ensures high-impedance sensing. |
| 4 | INB+ | Noninverting input of comparator B; used with INB− to form second independent threshold detector. |
| 5 | INA− | Inverting input of comparator A; shares same electrical specs as INB−; supports differential or single-ended configurations. |
| 6 | HYST | Hysteresis control node; voltage set between REF and (REF − 50mV) to program identical hysteresis on both comparators. |
| 7 | REF | 1.182V ±1% bandgap reference output referenced to V−; sources up to 25µA; must not be bypassed. |
| 8 | V+ | Positive supply rail; supports up to +11V; powers both comparators and reference; determines output swing ceiling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference in SO-8 | Reduces PCB area vs. discrete solutions; eliminates matching drift between separate reference and comparators. |
| Programmable hysteresis via HYST pin | Enables noise-immune threshold detection without external feedback resistors or layout-sensitive positive feedback loops. |
| No crowbar output switching current | Prevents supply rail disturbance during output transitions - critical for mixed-signal systems sharing analog/digital rails. |
| Rail-to-rail input with V− referenced REF | Allows full utilization of low-voltage supplies (e.g., 3V) while maintaining accurate, temperature-stable thresholds. |
| TTL/CMOS-compatible sourcing output | Drives 17mA at V+ − 0.4V (C/E temp), enabling direct interface with microcontroller GPIOs or logic gates without level shifters. |
Applications
| Battery-Powered Threshold Detector | Window Comparator for Power Monitoring |
|---|---|
Use Scenario: Detecting low-battery condition in handheld medical devices using a single 3V coin cell. IC Role / Device Role / Timing Role: Dual comparator monitors battery voltage against upper (e.g., 2.8V) and lower (e.g., 2.4V) thresholds using resistor dividers and shared REF. Use Value: 6µA quiescent current extends operational life beyond 5 years; HYST pin simplifies hysteresis tuning to prevent chatter near trip points. | Use Scenario: Validating 5V system supply integrity in industrial PLC I/O modules. IC Role / Device Role / Timing Role: MAX923CSA-T implements undervoltage (OUTA) and overvoltage (OUTB) flags; AND-gated output generates "power-good" signal. Use Value: Internal 1.182V reference ensures consistent thresholds across temperature; dual outputs eliminate need for two separate comparator ICs. |
| Oscillator Circuit with Hysteresis | LED Bar-Graph Level Indicator |
Use Scenario: Building relaxation oscillator for low-power status blinkers in asset trackers. IC Role / Device Role / Timing Role: One comparator acts as Schmitt trigger with RC network on HYST/REF; second comparator unused or repurposed. Use Value: Programmable hysteresis sets precise oscillation frequency; 40mA source current drives timing capacitor directly without buffer. | Use Scenario: Visual battery charge level indication in portable test equipment. IC Role / Device Role / Timing Role: Four-stage LED driver using cascaded resistor dividers and MAX923CSA-T's two comparators plus external logic. Use Value: 40mA output capability drives multiple LEDs per channel; ultra-low supply current preserves display runtime. |
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 |
|---|---|---|---|
| LM393DR | No internal reference; no hysteresis pin; higher 1mA quiescent current; open-collector outputs require pull-up. | Requires external reference and hysteresis circuitry; unsuitable for ultra-low-power or single-supply REF-referenced designs. | Select when cost is primary constraint and reference/hysteresis can be implemented externally. |
| TLV3702IDR | Includes rail-to-rail input but no internal reference; 850nA quiescent current; push-pull outputs; no HYST pin. | Needs external reference for precision thresholds; hysteresis requires feedback resistors; better for high-speed (<1µs) but not micropower use cases. | Select when sub-1µs response is required and reference can be sourced separately. |
Compared with LM393DR and TLV3702IDR, the MAX923CSA-T uniquely integrates reference and hysteresis control in a single SO-8 package while delivering 6µA quiescent current - making it the only choice for compact, self-contained, battery-life-optimized dual-threshold detection.
Availability
MAX923CSA-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 −40°C to +85°C operation and long-term traceability.
Supply support for MAX923CSA-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, medical, and communications applications.
The MAX92x family targets ultra-low-power sensing systems where micropower operation, integrated reference stability, and noise-immune hysteresis are mandatory - specifically engineered for portable instrumentation and energy-constrained monitoring nodes.
FAQ
What is the operating temperature range for the MAX923CSA-T?
The MAX923CSA-T is specified for −40°C to +85°C (industrial temperature range). This is confirmed by its "E" grade suffix in the ordering information (MAX923ESA and MAX923ESAT), and all electrical characteristics in the datasheet - including supply current, reference voltage, and propagation delay - are guaranteed across this full range.
Does the MAX923CSA-T require external components to implement hysteresis?
Yes, but minimally: the MAX923CSA-T uses its HYST pin with two external resistors (R1 between REF and HYST, R2 between HYST and V−) to program identical hysteresis on both comparators. No feedback loop or op-amp is needed - unlike alternatives such as LM393, which require external positive feedback networks.
Can the MAX923CSA-T operate from a 3V supply?
Yes, the MAX923CSA-T operates from +2.5V to +11V single supply. At 3V, it maintains ≤6µA quiescent current, 1.182V reference accuracy, and full input common-mode range (0V to 1.7V), making it ideal for single-cell Li-ion or alkaline-powered systems where headroom is limited.
What is the function of the REF pin on the MAX923CSA-T?
The REF pin on the MAX923CSA-T outputs a precision 1.182V ±1% bandgap voltage referenced to V− (not GND). It serves as a stable threshold source for both comparators and the HYST network. The datasheet specifies it can source up to 25µA at +25°C and must never be bypassed to preserve noise performance.
Is the MAX923CSA-T pin-compatible with other MAX92x variants in SO-8 package?
Yes, the MAX923CSA-T shares the same SO-8 pinout as MAX921CSA, MAX922CSA, and MAX923CUA. However, functionality differs: MAX921 is single comparator with REF/HYST; MAX922 is dual comparator without REF; MAX923CSA-T is dual comparator with REF/HYST - so PCB reuse is possible but firmware/schematic validation is required.
MAX923CSA-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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX923CSA-T FAQ
1.How can I place an order for MAX923CSA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX923CSA-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 MAX923CSA-T reliable?
The price and inventory of MAX923CSA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX923CSA-T is usually 5 days.
3.What payment methods are accepted for MAX923CSA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX923CSA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX923CSA-T?
MAX923CSA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX923CSA-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 MAX923CSA-T?
For technical support, including MAX923CSA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX923CSA-T requirements.
6.How does Aetrix verify that MAX923CSA-T is sourced from the original manufacturer or authorized distributors?
All MAX923CSA-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 MAX923CSA-T meets industry standards.
7.What is the process for return or replacement of MAX923CSA-T?
All MAX923CSA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX923CSA-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 MAX923CSA-T part is unused and in its original packaging.
Return procedure for MAX923CSA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX923CSA-T Tags
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LM2903DR
Texas Instruments
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
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LM393DR
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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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