My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX941ESA
- Part No.:
- MAX941ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX941ESA.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,496
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX941ESA 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 - ideal for battery-powered threshold detection and CMOS/TTL interfacing.
For engineers reviewing the MAX941ESA datasheet, MAX941ESA pinout, MAX941ESA application, or MAX941ESA equivalent, key selection criteria include its -40°C to +85°C industrial temperature range, 8-pin SO package, latch/shutdown functionality, and verified rail-to-rail input operation down to 2.7V.
Technical Context
The MAX941ESA implements a bipolar-input comparator architecture with internal hysteresis (1mV typical), enabling clean switching on slow-moving signals without external components. Its rail-to-rail input stage accepts common-mode voltages from -0.2V to V+ + 0.2V, and its current-driven output delivers VOH = V+ − 0.2V and VOL = 0.2V at 400μA load.
Latch and shutdown control pins are TTL/CMOS-compatible with VIH = V+/2 + 0.4V and VIL = V+/2 − 0.4V. Shutdown reduces supply current to ≤60μA while placing the output in high-impedance state, and latch operation stores output state with 50ns minimum pulse width and 70ns propagation delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct interface with Li-ion battery (3.0–4.2V) and 3.3V/5V logic rails |
| Propagation Delay | 80ns (typ) at 5mV overdrive - enables reliable sampling of >10MHz analog edges |
| Input Offset Voltage | 1mV (typ), 3mV (max) over temp - ensures accurate threshold detection in precision discriminators |
| Supply Current | 350μA (typ) per comparator - allows ultra-low-power operation in always-on sensor monitoring |
| Rail-to-Rail Input Range | -0.2V to V+ + 0.2V - permits input signals beyond supply rails without damage or inversion |
| Output Swing | VOL = 0.2V, VOH = V+ − 0.2V at 400μA - directly drives CMOS/TTL inputs without pull-up resistors |
| Shutdown Current | ≤60μA - reduces system standby power by >90% vs active mode |
Pinout & Package
MAX941ESA is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant, with exposed pad not electrically connected.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left floating or grounded; no routing required |
| 2 | OUT | Open-drain compatible CMOS/TTL output - sinks up to 4mA, sources limited by pull-up |
| 3 | GND | Analog/digital ground reference - requires low-inductance connection to PCB ground plane |
| 4 | LATCH | Active-low transparent latch control - latches output when pulled low; high-impedance input |
| 5 | SHDN | Active-low shutdown enable - disables comparator core and forces output high-Z |
| 6 | IN− | Inverting input - accepts rail-to-rail common-mode voltage; protected by internal clamp diodes |
| 7 | IN+ | Noninverting input - identical voltage range and protection as IN− |
| 8 | V+ | Positive supply input - requires local 0.1μF ceramic decoupling capacitor placed <2mm away |
Key Features
| Feature | Design Value |
|---|---|
| Internal Hysteresis | 1mV typical input-referred hysteresis - eliminates need for external feedback resistors in noise-prone environments |
| Latch Function | 50ns minimum LATCH pulse width - captures transient comparator events for digital readout without timing-critical sampling |
| Shutdown Mode | 60μA max shutdown current - enables microcontroller-controlled power gating in portable devices |
| Rail-to-Rail Inputs | Operates with inputs 0.2V beyond V+ or GND - supports direct sensing of unbuffered transducer outputs |
| CMOS/TTL-Compatible Outputs | VOH/VOL meet 3.3V/5V logic thresholds without external level-shifting - simplifies interface to microcontrollers and FPGAs |
Applications
| Battery-Powered Threshold Detector | Zero-Crossing Detector |
|---|---|
Use Scenario: Monitoring battery voltage against programmable low-battery cutoff (e.g., 3.2V) in handheld medical devices. IC Role / Device Role / Timing Role: Single comparator comparing divided battery voltage to reference; latch holds alert state until MCU service. Use Value: 350μA quiescent current extends runtime; rail-to-rail input accommodates full 2.7–4.2V Li-ion range without signal conditioning. | Use Scenario: Detecting AC line zero crossings for phase-controlled dimmers or motor commutation timing. IC Role / Device Role / Timing Role: High-speed comparator with internal hysteresis rejecting noise near zero-crossing point; fast 80ns response ensures precise timing. Use Value: 1mV offset and 1mV hysteresis minimize timing jitter; rail-to-rail input handles ±10V transformer-coupled signals directly. |
| 3.3V Digital Threshold Generator | Line Receiver for Industrial Bus |
Use Scenario: Converting DAC output (e.g., MAX512) into clean digital edge for clocked event triggering in test equipment. IC Role / Device Role / Timing Role: Comparator with latch synchronizing analog threshold crossing to system clock domain. Use Value: 70ns latch propagation delay and 20ns setup time ensure deterministic capture; 3.3V-compatible I/O eliminates level shifters. | Use Scenario: Receiving differential RS-422/RS-485 bus signals in factory automation controllers. IC Role / Device Role / Timing Role: Single-ended receiver stage converting bus differential voltage to logic-level signal; shutdown enables bus isolation during sleep. Use Value: 80ns propagation delay supports >10Mbps data rates; ±0.4V output swing guarantees TTL/CMOS compatibility across voltage tolerances. |
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 typ), no latch/shutdown, wider offset (2mV typ), no rail-to-rail input | Suitable only for non-critical 5V-only systems with relaxed speed/accuracy requirements | Select only if cost is primary constraint and 80ns timing or 2.7V operation is unnecessary |
| TLV3501CDR | Faster (4.5ns typ), rail-to-rail input, no latch/shutdown, higher supply current (7.5mA), 5V-only supply | Applicable in high-frequency sampling but incompatible with battery-powered 3V systems | Choose when nanosecond response is mandatory and 3V operation or power gating is not required |
Compared with LM393DR and TLV3501CDR, the MAX941ESA uniquely balances 80ns speed, 350μA ultra-low power, rail-to-rail input, and integrated latch/shutdown - making it the only option supporting battery-powered, precision, and digitally controllable threshold detection in a single 8-pin SO package.
Availability
MAX941ESA is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor interfaces, and 3.3V/5V embedded control systems requiring stable component supply across extended temperature ranges.
Supply support for MAX941ESA 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 precision analog, mixed-signal, and high-speed interface ICs for industrial, communications, and consumer applications.
The MAX941ESA belongs to Maxim's high-speed comparator product line, designed specifically for low-voltage, low-power, rail-to-rail sensing in portable and embedded systems where timing accuracy and supply flexibility are critical.
FAQ
What is the operating temperature range of the MAX941ESA?
The MAX941ESA is rated for -40°C to +85°C, qualifying it for industrial and automotive under-hood auxiliary applications. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The MAX941ESA maintains specified performance-including 80ns propagation delay and 1mV offset-across this full range, unlike commercial-grade variants such as MAX941CPA (0°C to +70°C).
Does the MAX941ESA require external pull-up resistors on its output?
No, the MAX941ESA does not require external pull-up resistors. Its output stage pulls to within 0.2V of V+ (VOH) and 0.2V of GND (VOL) at 400μA load, meeting standard CMOS and TTL logic thresholds directly. This rail-to-rail output capability is explicitly verified in the Electrical Characteristics table under "Output High/Low Voltage" and eliminates external components in most digital interface designs.
How does the latch function operate in the MAX941ESA?
The MAX941ESA 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. The datasheet specifies 50ns minimum latch pulse width and 70ns latch propagation delay. This function is exclusive to the MAX941 family and is not present in MAX942 or MAX944 variants.
Can the MAX941ESA be used with a 2.7V supply?
Yes, the MAX941ESA is fully specified down to 2.7V supply voltage, as stated in the Electrical Characteristics table under "Positive Supply Voltage" (V+ = 2.7V to 5.5V). At 2.7V, it maintains 80ns propagation delay (typ), 350μA supply current (typ), and rail-to-rail input operation - making it suitable for single-cell Li-ion and coin-cell powered systems where headroom is constrained.
What is the maximum input common-mode voltage range for the MAX941ESA?
The MAX941ESA supports an input common-mode voltage range of -0.2V to V+ + 0.2V, verified in the Electrical Characteristics table. This rail-to-rail-plus margin allows inputs to safely exceed both supply rails by 200mV without damage or false output inversion, a feature critical for interfacing with unbuffered sensors or transformer-coupled signals in industrial applications.
MAX941ESA 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:
- Obsolete
- 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 FAQ
1.How can I place an order for MAX941ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX941ESA 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 reliable?
The price and inventory of MAX941ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX941ESA is usually 5 days.
3.What payment methods are accepted for MAX941ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX941ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX941ESA?
MAX941ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX941ESA 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?
For technical support, including MAX941ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX941ESA requirements.
6.How does Aetrix verify that MAX941ESA is sourced from the original manufacturer or authorized distributors?
All MAX941ESA 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 meets industry standards.
7.What is the process for return or replacement of MAX941ESA?
All MAX941ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX941ESA, 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 part is unused and in its original packaging.
Return procedure for MAX941ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX941ESA Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
