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Analog Devices Inc./Maxim Integrated MAX975EUA-T
- Part No.:
- MAX975EUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX975EUA-T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,434
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Product details
Overview
MAX975EUA-T from Maxim Integrated is a single, +3V/+5V rail-to-rail comparator with three configurable operating modes: high-speed (28ns propagation delay), auto-standby (adjustable timeout via external capacitor), and low-power (3µA supply current). It features ground-sensing inputs, internal hysteresis in high-speed mode, and rail-to-rail CMOS/TTL-compatible outputs-ideal for battery-powered IR receivers and threshold detection in 3V systems.
For engineers reviewing the MAX975EUA-T datasheet, MAX975EUA-T pinout, MAX975EUA-T application, or MAX975EUA-T equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed auto-standby timing behavior, and real-world use cases including loss-of-signal indication and low-quiescent-power wake-up sensing.
Technical Context
The MAX975EUA-T integrates two parallel comparators-one high-speed (28ns tPD) and one low-power (480ns tPD)-with logic-controlled mode selection via LP and STO pins. Its auto-standby function monitors output stability and transitions to low-power mode after an externally set timeout (tASB = 10 × CSTO µs), reducing ICC from 250µA to 3µA without external intervention.
Input stage supports common-mode range from –0.2V to (VCC – 1.2V), differential rail-to-rail input voltage, and continuous short-circuit tolerance to either rail. Output stage provides rail-to-rail swing with 2mA sink/source capability and built-in hysteresis (0.3–4mV) only in high-speed mode to suppress noise-induced oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +5.25V - supports direct interface with Li-ion, 3.3V, and 5V logic rails without level shifting |
| Propagation Delay (High-Speed) | 28ns typical - enables reliable 35MHz signal edge detection in digital-line receivers |
| Supply Current (High-Speed) | 250µA typical - allows continuous monitoring in always-on sensor nodes with <1µA average current when combined with auto-standby |
| Supply Current (Low-Power) | 3µA max - extends battery life in RFID tags and keyless entry fobs beyond 10 years on coin cells |
| Input Common-Mode Range | –0.2V to (VCC – 1.2V) - permits ground-referenced input sensing while maintaining rail-to-rail output compatibility |
| Output Drive Capability | Rail-to-rail, 2mA sink/source - directly drives CMOS/TTL inputs without pull-up resistors or buffer stages |
| Auto-Standby Timeout Range | Adjustable from ~10µs to >1s via 1pF–100nF capacitor on STO pin - enables precise power/performance trade-off per application |
Pinout & Package
The MAX975EUA-T is housed in an 8-pin µMAX® package (U8-1), 3mm × 3mm, 0.5mm pitch, thermally enhanced with exposed pad. Pin count and physical layout match industry-standard SO-8 but in miniature footprint for space-constrained portable designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts +2.7V to +5.25V; requires local 0.1µF ceramic decoupling for stable high-speed operation |
| IN+ (Pin 2) | Noninverting comparator input | Supports rail-to-rail differential input; common-mode range extends to –0.2V for ground-sensing applications |
| IN– (Pin 3) | Inverting comparator input | Same voltage range as IN+; used with IN+ to form threshold detector or window comparator front-end |
| STAT (Pin 4) | Mode status output | Open-drain capable of sourcing 3mA; asserts high during auto-standby/low-power, low during high-speed operation |
| STO (Pin 5) | Standby timeout programming input | Connects to external capacitor (CSTO); sets idle timeout period tASB = 10 × CSTO µs (C in pF) |
| GND (Pin 6) | Analog/digital ground reference | Shared ground for all circuitry; must connect to low-inductance ground plane to minimize noise coupling |
| OUT (Pin 7) | Comparator output | Rail-to-rail CMOS/TTL-compatible output; retains logic state and drive strength across all operating modes |
| LP (Pin 8) | Low-power mode control input | Logic-high forces low-power mode; logic-low enables high-speed or auto-standby; sensitive to noise-requires 0.1µF bypass if fall time >10µs |
Key Features
| Feature | Design Value |
|---|---|
| Three selectable operating modes | Hardware-configurable via LP/STO pins-no firmware or external controller needed for dynamic power scaling |
| Auto-standby with adjustable timeout | Timeout programmable from microseconds to seconds using single external capacitor-enables adaptive power management in intermittent-signal systems |
| Rail-to-rail input and output | Full supply-range operation eliminates need for input biasing or output level-shifting circuitry in 3V/5V mixed-signal designs |
| Internal hysteresis (high-speed mode) | 0.3–4mV input-referred hysteresis prevents chatter on slow-moving or noisy signals without external components |
| Continuous rail fault tolerance | All pins withstand indefinite short-circuit to VCC or GND-ensures robustness in industrial and automotive environments |
| STAT pin power-sourcing capability | 3mA source current enables STAT to power auxiliary circuitry (e.g., LED indicator, enable signal) only when comparator is in low-power or standby state |
Applications
| IR Receivers | RFID Tags |
|---|---|
|
Use Scenario: Detect modulated infrared pulses from remote controls in battery-powered consumer devices. IC Role / Device Role / Timing Role: Comparator front-end converting photodiode current into clean digital pulses; STAT pin indicates signal presence/absence. Use Value: Auto-standby reduces average current to <1µA between bursts, extending CR2032 battery life to >5 years. |
Use Scenario: Decode low-duty-cycle RF carrier signals in passive 13.56MHz RFID transponders. IC Role / Device Role / Timing Role: Threshold discriminator triggering wake-up on valid carrier envelope; LP pin controlled by baseband logic. Use Value: 3µA low-power mode enables multi-year operation on printed antenna energy harvesting. |
| Keyless Entry Systems | Threshold Detectors |
|
Use Scenario: Monitor door handle capacitance change or low-frequency RF field strength in automotive passive entry modules. IC Role / Device Role / Timing Role: Fast-response comparator detecting proximity events; STAT pin powers RF receiver only upon valid trigger. Use Value: 28ns propagation delay ensures sub-millisecond response; rail-to-rail inputs simplify analog front-end design. |
Use Scenario: Monitor battery voltage, temperature sensor output, or sensor thresholds in portable medical devices. IC Role / Device Role / Timing Role: Precision voltage discriminator with user-adjustable hysteresis; STO capacitor sets timeout before entering ultra-low-power sleep. Use Value: Input offset voltage ≤±5mV over temperature ensures accurate trip-point stability across –40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV7215M5X | Single 6V comparator with 7ns tPD and 65µA ICC; no auto-standby or LP pin; fixed high-speed operation only | Suitable for always-on, high-speed edge detection but lacks adaptive power management for battery systems | Select when maximum speed is critical and power budget allows continuous 65µA operation |
| TLV3691DBVR | Single 5.5V comparator with 360ns tPD and 320nA ICC; includes shutdown pin but no auto-standby or internal hysteresis | Better for microamp-level always-sleep applications but cannot respond to fast transients without external wake-up circuitry | Select when lowest quiescent current dominates and signal edges are slow (>1µs rise/fall) |
Compared with LMV7215M5X and TLV3691DBVR, the MAX975EUA-T uniquely balances nanosecond-speed response, micropower standby, and hardware-configurable auto-standby-making it the only option that delivers both 28ns propagation delay and 3µA low-power operation in a single device without external control logic.
Availability
MAX975EUA-T is available at Aetrix Electronics and suitable for battery-powered systems, IR receivers, and threshold detectors requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX975EUA-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 demanding industrial, automotive, and communications applications.
The MAX975EUA-T belongs to Maxim's high-performance comparator product line, engineered specifically for ultra-low-power, high-speed sensing in energy-constrained portable and wireless systems.
FAQ
What is the maximum timeout period achievable with the MAX975EUA-T's auto-standby feature?
The MAX975EUA-T's auto-standby timeout is set by an external capacitor on the STO pin using tASB = 10 × CSTO µs (C in pF). With a 100nF capacitor, the timeout reaches 1 second. Larger values are limited by capacitor leakage-ceramic types up to 1µF are recommended. The MAX975EUA-T datasheet confirms this relationship applies across the full –40°C to +85°C temperature range.
Can the MAX975EUA-T operate from a 2.7V supply while maintaining full specification compliance?
Yes-the MAX975EUA-T is fully specified from +2.7V to +5.25V. Electrical characteristics including 28ns propagation delay, ±5mV input offset voltage, and rail-to-rail output swing are guaranteed at VCC = 2.7V over temperature. This makes the MAX975EUA-T suitable for single-cell Li-ion and alkaline battery systems where voltage drops below 3V during discharge.
How does the STAT pin behave during mode transitions in the MAX975EUA-T?
The STAT pin goes high during auto-standby entry, low-power mode, and the transition from standby to high-speed mode-and goes low only when the MAX975EUA-T is stably operating in high-speed mode. It sources up to 3mA, enabling direct powering of status LEDs or enable signals. The MAX975EUA-T timing diagram (Figure 2) shows STAT remains asserted high for ~1.6µs after wake-up before settling low.
Is the MAX975EUA-T pin-compatible with other comparators in the MAX975/MAX977 family?
No-the MAX975EUA-T uses an 8-pin µMAX package (U8-1), while the MAX975ESA uses 8-pin SO (S8-2) and the dual MAX977 variants use 14-pin SO or 16-pin QSOP. Though functional pinout is identical across MAX975 variants, physical package dimensions, thermal pad presence, and solder profile differ. The MAX975EUA-T requires µMAX-specific layout and reflow settings.
What is the purpose of the LP pin on the MAX975EUA-T, and how should it be driven?
The LP pin selects operating mode: logic high forces low-power mode (3µA, 480ns tPD); logic low enables high-speed or auto-standby mode. It is noise-sensitive-datasheet Note 5 specifies bypassing with 0.1µF to GND if input fall time exceeds 10µs. Driving LP directly from microcontroller GPIO is acceptable if slew rate is controlled; open-drain drivers require <1nA leakage to avoid false mode switching. This behavior is explicitly defined for the MAX975EUA-T in the "Detailed Description" section.
MAX975EUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.25V
- :
- 2mV @ 5V
- Voltage - Input Offset (Max):
- 0.1µA @ 5.25V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 500µA
- Current - Quiescent (Max):
- 82dB CMRR, 90dB PSRR
- CMRR, PSRR (Typ):
- 820ns
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX975EUA-T FAQ
1.How can I place an order for MAX975EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX975EUA-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 MAX975EUA-T reliable?
The price and inventory of MAX975EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX975EUA-T is usually 5 days.
3.What payment methods are accepted for MAX975EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX975EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX975EUA-T?
MAX975EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX975EUA-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 MAX975EUA-T?
For technical support, including MAX975EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX975EUA-T requirements.
6.How does Aetrix verify that MAX975EUA-T is sourced from the original manufacturer or authorized distributors?
All MAX975EUA-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 MAX975EUA-T meets industry standards.
7.What is the process for return or replacement of MAX975EUA-T?
All MAX975EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX975EUA-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 MAX975EUA-T part is unused and in its original packaging.
Return procedure for MAX975EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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