My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX941CSA+
- Part No.:
- MAX941CSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX941CSA+.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:110
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX941CSA+ from Maxim Integrated is a single high-speed comparator optimized for 3V/5V single-supply systems, featuring rail-to-rail inputs, 80ns propagation delay (5mV overdrive), 350μA supply current per comparator, and integrated latch/shutdown functions. It operates from 2.7V to 5.5V and is used in battery-powered threshold detection and line receiver circuits.
For engineers reviewing the MAX941CSA+ datasheet, MAX941CSA+ pinout, MAX941CSA+ application, or MAX941CSA+ equivalent, key selection criteria include input common-mode range extending beyond rails, CMOS/TTL-compatible push-pull output without pullups, latch enable timing (tS = 20ns, tH = 30ns), and shutdown current <60μA at V+ = 3V.
Technical Context
The MAX941CSA+ implements a bipolar-input stage with internal back-to-back diode protection and 4.1kΩ series resistors, enabling ±0.3V differential input tolerance and common-mode range from –0.2V to (V+ + 0.2V). Its current-driven output stage delivers VOH = V+ – 0.2V (ISOURCE = 400μA) and VOL = 0.2V (ISINK = 400μA), ensuring direct interface with CMOS/TTL logic.
Internal hysteresis provides clean switching with 1mV typical offset voltage and 1–4mV trip-point width across temperature. The latch function operates transparently when LATCH = high and stores output state when LATCH = low; shutdown disables the comparator and forces output to high-impedance when SHDN = low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 5.5V - supports Li-ion battery (3.0–3.7V) and 3.3V/5V logic rails without level shifting |
| Propagation Delay | 80ns (typ) at 5mV overdrive - enables >10MHz signal discrimination in sampling circuits |
| Input Offset Voltage | 1mV (typ) at +25°C - ensures accurate threshold detection down to millivolt-level signals |
| Supply Current | 380μA (typ) at V+ = 3V - enables ultra-low-power operation in portable equipment |
| Rail-to-Rail Input Range | –0.2V to (V+ + 0.2V) - accepts inputs below GND or above V+, critical for sensor interfaces |
| Output Swing | VOL = 0.2V / VOH = V+ – 0.2V at 400μA - drives CMOS/TTL directly without external pullup resistors |
| Shutdown Current | 12μA (min) to 60μA (max) at V+ = 3V - reduces system standby power in battery-critical applications |
Pinout & Package
MAX941CSA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard 1.27mm pitch and 5.0mm × 6.2mm body size.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left unconnected or tied to GND per layout best practice |
| 2 | OUT | Comparator output - push-pull, CMOS/TTL-compatible, sinks up to 4mA, sources up to 400μA |
| 3 | GND | Analog ground reference - requires low-inductance connection to PCB ground plane |
| 4 | LATCH | Active-low latch control - high = transparent mode, low = latched output; high-impedance input |
| 5 | SHDN | Active-low shutdown control - high = normal operation, low = <60μA quiescent current, high-Z output |
| 6 | IN– | Inverting input - rail-to-rail capable, protected by internal diodes and 4.1kΩ series resistors |
| 7 | IN+ | Noninverting input - same protection and common-mode range as IN– |
| 8 | V+ | Positive supply - absolute max 6.5V; decoupling capacitor (0.1μF ceramic) required adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Latch Enable | Enables storage of comparison result without external flip-flop; tLPW = 50ns minimum pulse width required |
| Shutdown Function | Reduces supply current to <60μA and places output in high-impedance state - ideal for power-gated subsystems |
| Rail-to-Rail Inputs | Accepts voltages from –0.2V to V+ + 0.2V - eliminates need for input biasing in sensor front-ends |
| Internal Hysteresis | Provides 1–4mV input-referred hysteresis width - prevents oscillation on slow-moving or noisy signals |
| CMOS/TTL-Compatible Output | Push-pull output swings within 200mV of rails - drives logic directly without pullup resistors or level shifters |
Applications
| Threshold Detector | Line Receiver |
|---|---|
Use Scenario: Detecting battery voltage drop below 3.2V in a portable medical device to trigger low-power mode. IC Role / Device Role / Timing Role: Single-supply comparator compares sensed battery voltage against precision reference; latch holds alarm state until MCU reads it. Use Value: 1mV offset and rail-to-rail input allow accurate 3.2V threshold setting using resistor divider from 3.3V rail, eliminating external op-amp buffer. | Use Scenario: Converting noisy RS-485 differential signals into clean digital logic levels for microcontroller UART input. IC Role / Device Role / Timing Role: High-speed comparator acts as line receiver with hysteresis suppressing noise-induced false transitions. Use Value: 80ns propagation delay and internal hysteresis ensure reliable edge detection at >10Mbps data rates without external filtering components. |
| Zero-Crossing Detector | Sampling Circuit Trigger |
Use Scenario: Synchronizing AC mains waveform sampling in energy metering ICs to minimize harmonic measurement error. IC Role / Device Role / Timing Role: Comparator monitors AC voltage across current-sense shunt; output toggles at each zero crossing. Use Value: Rail-to-rail input and 1mV offset enable precise zero-crossing detection even with small shunt voltage swings (<50mV peak). | Use Scenario: Generating precise sample-enable pulses for ADC conversion in a data acquisition system with variable analog input range. IC Role / Device Role / Timing Role: Comparator triggers ADC start-of-conversion based on analog input exceeding programmable threshold set by DAC. Use Value: 80ns delay and low 350μA supply current allow tight timing control while minimizing power impact on battery-powered DAQ modules. |
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 rail-to-rail inputs, no latch/shutdown, higher supply current (500μA) | Suitable only for non-critical 5V-only systems where speed and power are secondary | Select LM393DR only if cost is primary constraint and 80ns timing or 2.7V operation is unnecessary |
| TLV3501CDR | Faster (4.5ns typ), rail-to-rail inputs, no latch/shutdown, higher supply current (5.5mA), requires dual supply or level-shifting for single-supply use | Better for RF/ultra-high-speed applications but incompatible with direct 3V battery interface | Choose TLV3501CDR only when sub-10ns response is mandatory and system can support higher power and supply complexity |
Compared with LM393DR and TLV3501CDR, the MAX941CSA+ uniquely balances 80ns speed, 350μA quiescent current, rail-to-rail input operation from 2.7V, and integrated latch/shutdown - making it optimal for space- and power-constrained portable systems requiring deterministic timing and low-voltage compatibility.
Availability
MAX941CSA+ is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors/discriminators, and line receivers requiring stable component supply across industrial temperature ranges (0°C to +70°C).
Supply support for MAX941CSA+ 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 high-speed ICs for industrial, communications, and consumer applications.
The MAX941CSA+ belongs to Maxim's high-speed comparator product line, engineered specifically for low-voltage, low-power, single-supply systems where rail-to-rail input range, fast propagation, and integrated control features are essential.
FAQ
What is the operating supply voltage range for the MAX941CSA+?
The MAX941CSA+ operates from 2.7V to 5.5V, supporting both 3V and 5V logic systems. Its absolute maximum supply rating is +6.5V relative to GND. This range allows direct integration with Li-ion batteries (nominal 3.7V, discharged to ~2.8V) and standard 3.3V or 5V rails without regulation - a key enabler for portable and energy-efficient designs using the MAX941CSA+.
Does the MAX941CSA+ require external pullup resistors on its output?
No, the MAX941CSA+ does not require external pullup resistors. Its push-pull output stage actively drives high to V+ – 0.2V and low to 0.2V at 400μA load, making it fully compatible with CMOS and TTL logic families. This eliminates BOM cost and board space associated with external resistors - a verified design feature confirmed in the MAX941CSA+ datasheet's Electrical Characteristics table under VOH/VOL specifications.
How does the latch function work on the MAX941CSA+?
The MAX941CSA+ latch is controlled by the active-low LATCH pin: when high, the comparator operates transparently; when pulled low, the current output state is stored and held regardless of subsequent input changes. Timing requirements include tS = 20ns setup and tH = 30ns hold time relative to LATCH transition. This behavior is explicitly defined in the MAX941CSA+ datasheet's Pin Description and Timing Diagram sections.
What is the input common-mode voltage range of the MAX941CSA+?
The MAX941CSA+ supports an input common-mode voltage range from –0.2V to (V+ + 0.2V), extending beyond both supply rails. This rail-to-rail capability is confirmed in the datasheet's Electrical Characteristics table (VCMR parameter) and enables direct interfacing with sensors or signals that swing below GND or above V+, such as thermocouples or AC-coupled audio - a defining feature of the MAX941CSA+.
Can the MAX941CSA+ be used in automotive applications?
The MAX941CSA+ is rated for 0°C to +70°C operation and is not qualified for automotive AEC-Q100 temperature ranges (–40°C to +125°C). For automotive use, Maxim offers the MAX941AUA-T (–40°C to +125°C, µMAX package) or MAX941ESA (–40°C to +85°C, SO package). The MAX941CSA+ is intended for commercial and industrial applications where ambient temperature remains within its specified range.
MAX941CSA+ 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:
- 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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
MAX941CSA+ FAQ
1.How can I place an order for MAX941CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX941CSA+ 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 MAX941CSA+ reliable?
The price and inventory of MAX941CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX941CSA+ is usually 5 days.
3.What payment methods are accepted for MAX941CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX941CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX941CSA+?
MAX941CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX941CSA+ 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 MAX941CSA+?
For technical support, including MAX941CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX941CSA+ requirements.
6.How does Aetrix verify that MAX941CSA+ is sourced from the original manufacturer or authorized distributors?
All MAX941CSA+ 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 MAX941CSA+ meets industry standards.
7.What is the process for return or replacement of MAX941CSA+?
All MAX941CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX941CSA+, 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 MAX941CSA+ part is unused and in its original packaging.
Return procedure for MAX941CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX941CSA+ 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…
