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Analog Devices Inc./Maxim Integrated MAX941ESA+T
- Part No.:
- MAX941ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX941ESA+T.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX941ESA+T from Maxim Integrated is a single high-speed rail-to-rail input comparator optimized for 3V/5V single-supply systems, featuring 80ns propagation delay, 350μA supply current per comparator, and ±0.4V output swing from rails - enabling direct interface with CMOS/TTL logic in battery-powered threshold detection and zero-crossing applications.
For engineers reviewing the MAX941ESA+T datasheet, MAX941ESA+T pinout, MAX941ESA+T application, or MAX941ESA+T equivalent, key selection considerations include its -40°C to +85°C operating range, 8-pin SO package, latch enable and shutdown functionality, and guaranteed rail-to-rail input operation down to 2.7V supply.
Technical Context
The MAX941ESA+T implements a bipolar process comparator core with internal hysteresis (1mV typical input-referred), eliminating external feedback components. Its input stage tolerates common-mode voltages from -0.2V to V+ + 0.2V and differential inputs up to ±(V+ + 0.3V), with robust short-circuit fault tolerance on all pins.
The output stage delivers current-driven switching: sourcing up to 4mA (VOH = V+ − 0.3V) and sinking up to 4mA (VOL = 0.4V), while maintaining low static power in active mode and reducing to ≤60μA in shutdown - controlled via dedicated SHDN and LATCH pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 5.5V - supports wide-range single-supply operation in portable and industrial 3V/5V systems |
| Propagation Delay | 80ns (typical, 5mV overdrive) - enables high-speed signal discrimination in sampling and line receiver circuits |
| Input Offset Voltage | 1mV (typ, TA = +25°C), 3mV (max, -40°C to +85°C) - ensures precise threshold detection without calibration |
| Rail-to-Rail Input Range | -0.2V to V+ + 0.2V - allows sensing beyond supply rails, critical for ground-referenced or overvoltage-tolerant designs |
| Output Swing | VOL = 0.4V (sink 4mA), VOH = V+ − 0.3V (source 4mA) - guarantees TTL/CMOS-compatible logic levels without pull-up resistors |
| Supply Current | 380–700μA (active, V+ = 3–5V), ≤60μA (shutdown) - enables ultra-low-power operation in always-on monitoring systems |
| Hysteresis | Internal 1mV (input-referred) - prevents oscillation on slow-moving or noisy signals without external components |
Pinout & Package
MAX941ESA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard 1.27mm pitch and surface-mount footprint per land pattern 90-0096.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left unconnected or tied to GND per layout best practice |
| 2 | OUT | Open-drain compatible comparator output - drives high/low actively; sinks 4mA, sources 400μA minimum |
| 3 | GND | Analog/digital ground reference - requires low-inductance connection to PCB ground plane |
| 4 | LATCH | Dedicated latch control input - high = transparent mode, low = latched output state (MAX941-specific) |
| 5 | SHDN | Shutdown enable input - high = active, low = shutdown (≤60μA ICC, high-Z output) |
| 6 | IN− | Inverting input - accepts rail-to-rail common-mode voltage; protected against ±(V+ + 0.3V) differential stress |
| 7 | IN+ | Noninverting input - identical protection and voltage range as IN−; forms precision differential pair with IN− |
| 8 | V+ | Positive supply pin - supports 2.7V to 5.5V; requires local 0.1μF ceramic decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Latch Enable | Hardware-controlled storage of comparison result via dedicated LATCH pin - eliminates need for external D-latch in data acquisition timing paths |
| Shutdown Function | Active-low SHDN reduces supply current to ≤60μA while placing output in high-impedance state - ideal for duty-cycled sensor interfaces |
| Rail-to-Rail Inputs | Operates with inputs from -0.2V to V+ + 0.2V - enables direct sensing of ground-referenced or overvoltage signals without level-shifting circuitry |
| Internal Hysteresis | Fixed 1mV input-referred hysteresis - suppresses noise-induced chatter on slow edges without external resistor networks |
| CMOS/TTL-Compatible Outputs | Output swings within 0.4V of either rail under 4mA load - directly drives logic families without pull-up resistors or level translators |
Applications
| Battery-Powered Threshold Detector | Zero-Crossing Detector |
|---|---|
Use Scenario: Monitoring battery voltage against programmable low-battery cutoff threshold in portable medical devices. IC Role / Device Role / Timing Role: Comparator compares DAC-adjusted reference against battery voltage; latched output triggers system shutdown sequence. Use Value: Rail-to-rail input captures full battery discharge curve (2.7V–4.2V); 1mV offset ensures accurate 3.2V cutoff without trimming. | Use Scenario: Detecting AC line zero crossings for phase-controlled dimming in smart lighting controllers. IC Role / Device Role / Timing Role: Compares AC-derived signal against ground reference; fast 80ns response minimizes timing jitter in firing-angle calculation. Use Value: Input common-mode range extends below GND (-0.2V), allowing direct coupling of AC signal without biasing network. |
| 3V/5V Line Receiver | Sampling Circuit Trigger |
Use Scenario: Converting noisy industrial RS-422 differential signals into clean single-ended logic for microcontroller input. IC Role / Device Role / Timing Role: Single comparator acts as threshold discriminator on terminated line; CMOS/TTL output drives GPIO directly. Use Value: 350μA supply current and rail-to-rail output ensure compatibility with 3.3V MCU I/O while minimizing board-level power loss. | Use Scenario: Generating precise sample-enable pulses synchronized to analog signal transitions in data loggers. IC Role / Device Role / Timing Role: Comparator detects when analog input crosses preset threshold; latch function holds pulse width for ADC start timing. Use Value: 20ns data-to-latch setup and 30ns hold time guarantee deterministic sampling window alignment with microsecond-scale events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower (300ns propagation), no latch/shutdown, wider offset (2mV typ), open-collector only | Suitable for cost-sensitive, non-critical threshold detection where speed and power are secondary | Select LM393DR only if 80ns speed, rail-to-rail input, or low-power shutdown are not required. |
| TLV3501CDR | Faster (4.5ns), higher supply current (8.5mA), no internal hysteresis, no latch/shutdown, 5V-only supply | Better for ultra-high-speed pulse discrimination but incompatible with 3V battery operation or latch-based sampling | Choose TLV3501CDR only when sub-10ns response is mandatory and 3V operation/latching are unnecessary. |
Compared with LM393DR and TLV3501CDR, the MAX941ESA+T uniquely balances 80ns speed, 350μA quiescent current, rail-to-rail input, and integrated latch/shutdown - making it optimal for portable, precision-triggered systems requiring both performance and power efficiency.
Availability
MAX941ESA+T is available at Aetrix Electronics and suitable for battery-powered systems, 3V/5V industrial sensors, and precision threshold detection applications requiring stable component supply across extended temperature ranges.
Supply support for MAX941ESA+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, communications, and consumer applications.
The MAX941ESA+T belongs to Maxim's high-speed comparator product line, designed specifically for low-voltage, low-power, rail-to-rail sensing in portable and space-constrained systems.
FAQ
What is the operating temperature range for the MAX941ESA+T?
The MAX941ESA+T is rated for operation from -40°C to +85°C. This extended industrial temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet. The "E" suffix in MAX941ESA+T explicitly denotes the -40°C to +85°C grade, and the "SA" package code specifies the 8-pin SO package. This makes the MAX941ESA+T suitable for deployment in automotive cabin modules, industrial PLC I/O, and outdoor sensor nodes.
Does the MAX941ESA+T require external pull-up resistors on its output?
No, the MAX941ESA+T does not require external pull-up resistors. Its output stage is designed to source up to 400μA and sink up to 4mA while driving within 0.4V of either supply rail (VOH ≥ V+ − 0.4V, VOL ≤ 0.4V). This rail-to-rail output swing meets CMOS and TTL logic thresholds directly, as verified in the Electrical Characteristics table under VOH and VOL parameters. The datasheet explicitly states outputs "pull to within 0.4V of either supply rail without external pullup circuitry."
How does the internal latch function work on the MAX941ESA+T?
The MAX941ESA+T's internal latch is controlled by the LATCH pin (Pin 4): when driven high, the comparator operates transparently; when pulled low, the current output state is stored and held regardless of subsequent input changes. Timing requirements include a 20ns data-to-latch setup time and 30ns latch-to-data hold time, as specified in the Electrical Characteristics table. This function is exclusive to the MAX941 family and is absent in MAX942/MAX944 variants - confirming its presence in the MAX941ESA+T.
Can the MAX941ESA+T operate from a 2.7V supply?
Yes, the MAX941ESA+T is fully specified to operate from a minimum supply voltage of 2.7V, as stated in the Electrical Characteristics table under "Positive Supply Voltage" (V+ = 2.7V to 5.5V). Performance parameters including propagation delay (80ns typ), supply current (380μA typ), and input offset voltage (1mV typ) are all guaranteed across this range. The datasheet highlights "Operation Down to 2.7V" in the Features list, confirming suitability for single-cell Li-ion and two-cell alkaline battery systems.
What is the purpose of the N.C. pin (Pin 1) on the MAX941ESA+T?
Pin 1 of the MAX941ESA+T is designated N.C. (No Connection) and is not internally connected to any circuitry, as confirmed in the Pin Description table and Pin Configurations diagram. The datasheet instructs that this pin "must be left unconnected." While some layouts may tie it to GND for mechanical stability, doing so provides no electrical benefit and is not required. Its presence is a package artifact from the shared 8-pin SO footprint used across MAX941/MAX942 variants, where Pin 1 serves different functions in dual-channel versions.
MAX941ESA+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 Latch, Shutdown
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 2mV @ 5.5V
- Voltage - Input Offset (Max):
- 0.15µA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 700µA
- Current - Quiescent (Max):
- 81.94dB CMRR, 81.94dB PSRR
- CMRR, PSRR (Typ):
- 80ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX941ESA+T FAQ
1.How can I place an order for MAX941ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX941ESA+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 MAX941ESA+T reliable?
The price and inventory of MAX941ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX941ESA+T is usually 5 days.
3.What payment methods are accepted for MAX941ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX941ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX941ESA+T?
MAX941ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX941ESA+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 MAX941ESA+T?
For technical support, including MAX941ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX941ESA+T requirements.
6.How does Aetrix verify that MAX941ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX941ESA+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 MAX941ESA+T meets industry standards.
7.What is the process for return or replacement of MAX941ESA+T?
All MAX941ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX941ESA+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 MAX941ESA+T part is unused and in its original packaging.
Return procedure for MAX941ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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