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Analog Devices Inc./Maxim Integrated MAX944CSD+TG002
- Part No.:
- MAX944CSD+TG002
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX944CSD+TG002.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
The MAX944CSD+TG002 from Maxim Integrated is a quad high-speed comparator optimized for 3V/5V single-supply systems, featuring rail-to-rail inputs, 80ns propagation delay (5mV overdrive), 350μA per comparator supply current, and CMOS/TTL-compatible push-pull outputs. It operates from 2.7V to 5.5V and is used in threshold detection, zero-crossing sensing, and line receiver circuits where low power and fast response are critical.
For engineers reviewing the MAX944CSD+TG002 datasheet, MAX944CSD+TG002 pinout, MAX944CSD+TG002 application, or MAX944CSD+TG002 equivalent, key selection considerations include guaranteed 80ns propagation delay across temperature, internal hysteresis for noise immunity, rail-to-rail input operation beyond supply rails, and compatibility with 14-pin narrow SO package layouts in battery-powered and industrial signal-conditioning designs.
Technical Context
The MAX944CSD+TG002 implements a bipolar process high-speed comparator core with internal hysteresis (1mV typical input-referred width), enabling clean switching without external feedback resistors. Its rail-to-rail input stage accepts common-mode voltages from –0.2V to V+ + 0.2V, and its output stage drives within 0.4V of either rail under 400μA load.
Each of the four comparators operates independently with matched propagation delay skew ≤10ns and differential delay ≤10ns. The device lacks latch or shutdown functions-features exclusive to the MAX941-making it suitable for continuous real-time comparison tasks in multi-channel analog monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct interface with 3.3V and 5V logic domains without level shifting. |
| Propagation Delay | 80ns (typ) at 5mV overdrive - enables reliable sampling of signals up to ~10MHz edge rates. |
| Input Offset Voltage | 1mV (max, TA = +25°C) - ensures accurate threshold detection down to millivolt-level differentials. |
| Supply Current per Comparator | 350μA (typ at V+ = 3V) - total quiescent current 1.4mA for all four channels, ideal for portable systems. |
| Input Common-Mode Range | –0.2V to V+ + 0.2V - allows inputs to swing 200mV beyond both supply rails, simplifying sensor interfacing. |
| Output Voltage Swing | VOL = 0.4V (max at 400μA sink), VOH = V+ – 0.2V (min at 400μA source) - directly drives CMOS/TTL inputs without pull-ups. |
| Internal Hysteresis | 1mV (typ input-referred) - suppresses chatter on slow-moving or noisy inputs without external components. |
Pinout & Package
MAX944CSD+TG002 is housed in a 14-pin narrow SO (Small Outline) package, RoHS-compliant, with standard 1.27mm pitch and gull-wing leads. Footprint matches land pattern 90-0112 per Maxim documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain compatible push-pull output - sinks or sources current to drive logic loads directly. |
| 2 | INA− | Inverting input for Comparator A - accepts rail-to-rail common-mode voltage including below GND and above V+. |
| 3 | INA+ | Noninverting input for Comparator A - matched offset and bias current with INA− for precision differential sensing. |
| 4 | V+ | Positive supply pin - must not exceed +6.5V; decoupling capacitor required adjacent to this pin. |
| 5 | INB+ | Noninverting input for Comparator B - electrically identical to INA+; independent channel operation. |
| 6 | INB− | Inverting input for Comparator B - paired with INB+; shares same input stage architecture as INA±. |
| 7 | OUTB | Comparator B output - fully buffered, no latch or shutdown control; synchronous with other outputs. |
| 8 | OUTC | Comparator C output - identical electrical behavior to OUTA/OUTB; supports parallel multi-threshold detection. |
| 9 | INC− | Inverting input for Comparator C - part of quad-input set; no crosstalk specification but layout isolation recommended. |
| 10 | INC+ | Noninverting input for Comparator C - matched performance to INA+/INB+; supports independent reference setup. |
| 11 | GND | Analog ground reference - must connect to low-impedance PCB ground plane; shared return for all comparators. |
| 12 | IND+ | Noninverting input for Comparator D - completes quad configuration; enables four independent decision paths. |
| 13 | IND− | Inverting input for Comparator D - full rail-to-rail input capability; tolerant of continuous short-circuit to either rail. |
| 14 | OUTD | Comparator D output - push-pull structure identical to others; no enable/disable pin - always active. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Operates with inputs from –0.2V to V+ + 0.2V - eliminates need for input clamping or level-shifting circuitry. |
| 80ns propagation delay | Guaranteed at 5mV overdrive - enables precise timing capture in high-speed pulse discrimination and clock recovery. |
| Internal 1mV hysteresis | Fixed, non-adjustable hysteresis - removes external resistor network and design uncertainty in noise-prone environments. |
| CMOS/TTL-compatible outputs | Pull to within 0.4V of V+ or GND under 400μA load - interfaces directly with 3.3V/5V logic families without external pull-ups. |
| Quad independent channels | Four fully isolated comparators in one 14-pin SO package - reduces board space vs. discrete duals or singles. |
| Short-circuit tolerant I/O | All pins withstand continuous fault to V+ or GND - enhances reliability in industrial sensor and motor-control feedback loops. |
Applications
| Battery-Powered Threshold Detection | Industrial Line Receiver |
|---|---|
|
Use Scenario: Monitoring battery cell voltage against multiple thresholds (e.g., under-voltage lockout, charge-complete, over-voltage alarm) in portable medical devices. IC Role / Device Role / Timing Role: Quad comparator simultaneously compares four reference voltages against a single sensed cell voltage using resistor-divider networks. Use Value: 350μA per comparator enables 1.4mA total system standby current; rail-to-rail inputs accept 0–4.2V Li-ion range without attenuation. |
Use Scenario: Receiving differential RS-422/RS-485-like signals in factory automation controllers where noise immunity and speed are critical. IC Role / Device Role / Timing Role: One comparator channel acts as a line receiver with hysteresis to reject EMI-induced glitches on long cable runs. Use Value: 80ns delay supports >10Mbps data rates; output swing to 0.4V/ V+–0.2V ensures robust logic-level translation into FPGA I/O banks. |
| Zero-Crossing Detector for AC Mains | Sampling Circuit Trigger Generator |
|
Use Scenario: Detecting AC line zero crossings in smart energy meters and solid-state relays to synchronize switching and reduce EMI. IC Role / Device Role / Timing Role: Comparator compares scaled AC waveform against 0V reference; internal hysteresis prevents false triggering near zero. Use Value: Input common-mode range extends below GND (–0.2V) - accommodates biased AC signals without negative supply rail. |
Use Scenario: Generating precise sample-enable pulses for ADCs in data acquisition systems based on analog signal crossing programmable thresholds. IC Role / Device Role / Timing Role: Two comparator outputs feed OR logic to produce a windowed trigger; third and fourth monitor auxiliary conditions. Use Value: Propagation delay skew ≤10ns between channels ensures sub-nanosecond timing alignment across multi-threshold events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Slower (1.3μs propagation delay), higher supply current (500μA/comparator), no rail-to-rail inputs, open-collector outputs requiring pull-ups. | Acceptable for DC or low-frequency threshold detection only; unsuitable for >100kHz signal conditioning or battery-sensitive designs. | Select LM339DR only when cost is primary constraint and speed/power specs are relaxed. |
| TLV3201AIDR | Faster (40ns), lower power (65μA/comparator), rail-to-rail inputs/outputs, but single-channel - requires four units for quad function. | Higher board area and BOM count; superior for ultra-low-power or high-speed single-channel use, not drop-in quad replacement. | Choose TLV3201AIDR when redesigning for lowest possible current or highest speed per channel, accepting layout and sourcing complexity. |
Compared with LM339DR and TLV3201AIDR, the MAX944CSD+TG002 uniquely balances quad integration, 80ns speed, 350μA/channel efficiency, and rail-to-rail operation in a single 14-pin SO package - making it optimal for space-constrained, medium-speed, multi-threshold embedded systems.
Availability
MAX944CSD+TG002 is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial line receivers, zero-crossing detectors, and multi-threshold sampling circuits requiring stable component supply across production lifecycles.
Supply support for MAX944CSD+TG002 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 MAX941/MAX942/MAX944 family was designed specifically for low-voltage, high-speed comparator applications in portable and 3V/5V systems - emphasizing rail-to-rail operation, minimal supply current, and integrated hysteresis without external components.
FAQ
What is the operating temperature range for MAX944CSD+TG002?
The MAX944CSD+TG002 is specified for 0°C to +70°C ambient operation, as indicated by the 'C' grade suffix in the part number. This commercial-grade rating makes it suitable for indoor consumer and industrial equipment where ambient temperatures remain within that envelope. The device's electrical characteristics - including propagation delay, offset voltage, and supply current - are guaranteed across this full range per the datasheet's Electrical Characteristics table.
Does MAX944CSD+TG002 include shutdown or latch functionality?
No, the MAX944CSD+TG002 does not include shutdown or latch functionality. These features are exclusive to the MAX941 variant (single comparator). The MAX944 is a quad comparator with fixed, always-active operation - all four channels continuously compare inputs and update outputs without control pins. This simplifies design for applications requiring persistent real-time monitoring without mode switching.
Can MAX944CSD+TG002 drive TTL logic directly?
Yes, MAX944CSD+TG002 can drive TTL logic directly. Its outputs swing to within 0.4V of GND (VOL ≤ 0.4V at 400μA sink) and to within 0.2V of V+ (VOH ≥ V+ – 0.2V at 400μA source), meeting TTL input voltage thresholds for both logic low (<0.8V) and logic high (>2.0V) when powered from 3.3V or 5V supplies. No external pull-up resistors are needed.
What is the maximum supply voltage rating for MAX944CSD+TG002?
The absolute maximum supply voltage for MAX944CSD+TG002 is +6.5V referenced to GND. However, functional operation is specified only from 2.7V to 5.5V. Operating above 5.5V risks violating parametric guarantees (e.g., propagation delay, offset voltage, supply current) and may accelerate long-term reliability degradation. Always limit V+ to ≤5.5V in normal operation.
Is MAX944CSD+TG002 pin-compatible with other MAX94x variants?
No, MAX944CSD+TG002 is not pin-compatible with MAX941 or MAX942. It uses a 14-pin SO package with dedicated pins for four independent comparators (e.g., OUTA, OUTB, OUTC, OUTD), whereas MAX941 (8-pin) and MAX942 (8-pin) integrate only one or two comparators. Substituting MAX944CSD+TG002 into a MAX942 footprint would result in unconnected pins and missing functionality - correct layout and schematic revision are required.
MAX944CSD+TG002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- :
- -
MAX944CSD+TG002 FAQ
1.How can I place an order for MAX944CSD+TG002 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX944CSD+TG002 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 MAX944CSD+TG002 reliable?
The price and inventory of MAX944CSD+TG002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX944CSD+TG002 is usually 5 days.
3.What payment methods are accepted for MAX944CSD+TG002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX944CSD+TG002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX944CSD+TG002?
MAX944CSD+TG002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX944CSD+TG002 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 MAX944CSD+TG002?
For technical support, including MAX944CSD+TG002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX944CSD+TG002 requirements.
6.How does Aetrix verify that MAX944CSD+TG002 is sourced from the original manufacturer or authorized distributors?
All MAX944CSD+TG002 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 MAX944CSD+TG002 meets industry standards.
7.What is the process for return or replacement of MAX944CSD+TG002?
All MAX944CSD+TG002 units undergo pre-shipment inspection (PSI). If there is an issue with MAX944CSD+TG002, 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 MAX944CSD+TG002 part is unused and in its original packaging.
Return procedure for MAX944CSD+TG002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX944CSD+TG002 Tags
-
LM2903DR
Texas Instruments
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LM339DR
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LM339PWR
Texas Instruments
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LM393DT
STMicroelectronics
-
LM2901PWR
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-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP USA Inc.
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