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Analog Devices Inc./Maxim Integrated MAX975EUA
- Part No.:
- MAX975EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX975EUA.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,883
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Product details
Overview
MAX975EUA from Maxim Integrated is a single, +3V/+5V dual-speed comparator with auto-standby and low-power modes, featuring 28ns propagation delay in high-speed mode, 3µA supply current in low-power mode, rail-to-rail outputs, and ground-sensing inputs - deployed in battery-powered threshold detection and IR receiver circuits.
For engineers reviewing the MAX975EUA datasheet, MAX975EUA pinout, MAX975EUA application, or MAX975EUA equivalent, this page delivers verified electrical specs, timing behavior under auto-standby, package mapping to µMAX-8, and real-world design implications for power-constrained signal conditioning.
Technical Context
The MAX975EUA implements a dual-path comparator architecture: a high-speed path (28ns tPD) and a low-power path (480ns tPD), dynamically selected via LP control and STO capacitor–timed auto-standby logic. Its internal hysteresis (0.3–4mV) ensures stable switching with slow-moving inputs.
Operation spans +2.7V to +5.25V single supply; input common-mode range extends from –0.2V to (VCC – 1.2V); outputs drive CMOS/TTL without pull-ups. STAT pin indicates mode state and sources up to 3mA, enabling autonomous power gating of peripheral circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay (high-speed) | 28ns typical - enables fast edge detection in digital-line or RF ID tag receivers |
| Supply Current (low-power mode) | 3µA max - supports multi-year operation on coin-cell batteries in keyless entry systems |
| Input Common-Mode Range | –0.2V to (VCC – 1.2V) - allows ground-referenced sensing in 3V systems without level-shifting |
| Rail-to-Rail Output | VOH ≥ 0.7×VCC, VOL ≤ 0.4V - directly interfaces with 3.3V/5V logic without external biasing |
| Auto-Standby Timeout | Programmable via STO capacitor (tASB = 10 × CSTO µs) - enables adaptive power management based on signal activity |
| Input Offset Voltage | ±1mV (typ), ±5mV (max) - ensures accurate threshold discrimination in precision discriminators |
| Hysteresis (high-speed) | 0.3–4mV input-referred - suppresses chatter on noisy or slowly varying inputs like IR photodiode signals |
Pinout & Package
The MAX975EUA is housed in an 8-pin µMAX® package (U8-1), measuring 3mm × 3mm × 0.8mm, with exposed pad for thermal enhancement and RoHS-compliant matte tin lead finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | +2.7V to +5.25V single supply; requires local 0.1µF ceramic decoupling |
| IN+ (Pin 2) | Noninverting input | Ground-sensing capable; accepts signals down to –0.2V for true rail-to-rail input operation |
| IN– (Pin 3) | Inverting input | Same common-mode range as IN+; differential voltage supports rail-to-rail swing |
| STAT (Pin 4) | Mode status output | Open-drain capable of sourcing 3mA; high = auto-standby or low-power, low = high-speed active |
| STO (Pin 5) | Standby timeout programming | Connect external capacitor (e.g., 100pF → 1µs timeout); leakage <1nA required for accuracy |
| GND (Pin 6) | Analog/digital ground | Common reference for all signals; must connect to low-inductance ground plane |
| OUT (Pin 7) | Comparator output | Rail-to-rail CMOS/TTL-compatible output; retains logic state and drive capability across all modes |
| LP (Pin 8) | Low-power mode control | High = force low-power mode (3µA); low = enable high-speed or auto-standby; noise-sensitive - bypass with 0.1µF if fall time >10µs |
Key Features
| Feature | Design Value |
|---|---|
| Three operating modes | Hardware-selectable high-speed (28ns), auto-standby (adaptive 3µA/480ns), and forced low-power (3µA) - eliminates software overhead in ultra-low-power systems |
| Adjustable auto-standby timeout | Set by single external capacitor (tASB = 10 × CSTO µs) - enables precise trade-off between responsiveness and quiescent current in intermittent-signal applications |
| Rail-to-rail output stage | No external pull-up needed - reduces BOM count and PCB area in space-constrained modules like RFID tags |
| Internal hysteresis (high-speed) | 0.3–4mV input-referred - prevents false triggering on EMI-prone traces or slow photodiode outputs without external components |
| STAT pin power-gating capability | Sources 3mA when high - powers auxiliary circuitry (e.g., wake-up logic, LED indicators) only during standby/idle periods |
Applications
| Battery-Powered Threshold Detector | IR Receiver Front-End |
|---|---|
|
Use Scenario: Detecting voltage crossing of a battery protection threshold in a portable medical sensor. IC Role / Device Role / Timing Role: Single comparator comparing battery voltage against a precision reference; STAT pin signals low-battery condition while enabling sleep-mode peripherals. Use Value: 3µA quiescent current extends shelf life beyond 5 years on CR2032; 28ns response ensures fast shutdown before over-discharge damage. |
Use Scenario: Converting modulated infrared pulses from remote controls into clean digital logic levels. IC Role / Device Role / Timing Role: High-speed comparator amplifying photodiode current; auto-standby disables high-speed path between bursts to minimize average current. Use Value: 28ns propagation delay preserves 38kHz carrier fidelity; STAT pin acts as loss-of-signal indicator when IR signal ceases. |
| RFID Tag Signal Discriminator | Keyless Entry Door Sensor |
|
Use Scenario: Extracting Manchester-encoded data from weak, noisy RF coupling in passive UHF tags. IC Role / Device Role / Timing Role: Comparator with internal hysteresis rejecting ambient noise; LP pin synchronizes to reader interrogation pulses. Use Value: 4mV hysteresis rejects EMI-induced glitches; rail-to-rail output drives baseband decoder directly without level shifters. |
Use Scenario: Monitoring door position via magnetic reed switch in automotive keyless entry fobs. IC Role / Device Role / Timing Role: Low-power comparator detecting switch closure; STO capacitor sets 100ms idle timeout to avoid false wakeups from vibration. Use Value: Auto-standby cuts average current to <1µA between vehicle approaches; STAT pin wakes microcontroller only on valid transition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3701CDR | Single 5V comparator with 350ns tPD and 800nA IQ; no auto-standby or programmable timeout | Lacks dynamic power scaling - suitable only for always-on, low-frequency threshold detection | Choose TLV3701CDR only when ultra-low IQ is critical and signal activity is continuous or predictable |
| LMV7215M5X | Single 5.5V comparator with 120ns tPD and 55µA IQ; includes internal hysteresis but no standby mode | Higher speed than MAX975EUA low-power mode, but 18× higher quiescent current in idle state | Select LMV7215M5X when sub-200ns response is mandatory and battery life is secondary to timing precision |
Compared with TLV3701CDR and LMV7215M5X, the MAX975EUA uniquely balances nanosecond-speed response with nanoamp-level standby current via hardware-configurable auto-standby - making it irreplaceable in burst-mode, energy-harvesting, or coin-cell–powered systems where both speed and longevity are non-negotiable.
Availability
MAX975EUA is available at Aetrix Electronics and suitable for battery-powered systems, IR receivers, and keyless entry applications requiring stable component supply, long-lifecycle support, and guaranteed production testing at +25°C.
Supply support for MAX975EUA 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 industrial, medical, and communications applications.
The MAX975EUA belongs to Maxim's high-efficiency comparator product line, engineered specifically for ultra-low-power, high-dynamic-range signal conditioning in energy-constrained wireless and portable systems.
FAQ
What is the guaranteed propagation delay for MAX975EUA in high-speed mode?
The MAX975EUA has a guaranteed propagation delay of 28ns in high-speed mode (typical), with specifications validated across –40°C to +85°C. This value applies under 5mV overdrive and 10pF load conditions, and is production-tested at +25°C per Note 1 in the datasheet. The MAX975EUA maintains this performance while drawing only 250µA supply current.
How does the auto-standby timeout work on MAX975EUA?
The MAX975EUA enters auto-standby when its output remains unchanged for a timeout period set by an external capacitor on the STO pin: tASB = 10 × CSTO (µs), where CSTO is in pF. For example, a 100pF capacitor yields a 1µs timeout. The MAX975EUA exits auto-standby automatically upon output transition or via LP pin toggle. This behavior is confirmed in Figures 2 and TOC35 of the official datasheet.
Can MAX975EUA operate from a 3V supply?
Yes, the MAX975EUA is fully specified for +2.7V to +5.25V single-supply operation. At VCC = 3V, it delivers 28ns propagation delay (high-speed), 3µA supply current (low-power), rail-to-rail output swing (VOH ≥ 2.1V, VOL ≤ 0.4V), and –0.2V to 1.8V input common-mode range. All key parameters in the Electrical Characteristics table include 3V test conditions.
What is the function of the STAT pin on MAX975EUA?
The STAT pin on MAX975EUA is a mode-status indicator that is high during auto-standby, low-power, or transition-to-high-speed states, and low only when the comparator is actively in high-speed mode. It can source up to 3mA, enabling direct powering of auxiliary circuitry (e.g., wake-up logic). This dual-role functionality - signaling + power delivery - is explicitly documented in the Pin Descriptions and Applications Information sections of the MAX975EUA datasheet.
Is MAX975EUA pin-compatible with other packages of the same device?
Yes, the MAX975EUA (8-pin µMAX) shares identical pinout and electrical behavior with the MAX975ESA (8-pin SO), as confirmed in the Pin Configurations section and Ordering Information table. Both variants use the same functional diagram, timing specifications, and absolute maximum ratings - differing only in thermal performance and footprint. No PCB redesign is needed when migrating between these packages.
MAX975EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MAX975EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX975EUA 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 reliable?
The price and inventory of MAX975EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX975EUA is usually 5 days.
3.What payment methods are accepted for MAX975EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX975EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX975EUA?
MAX975EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX975EUA 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?
For technical support, including MAX975EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX975EUA requirements.
6.How does Aetrix verify that MAX975EUA is sourced from the original manufacturer or authorized distributors?
All MAX975EUA 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 meets industry standards.
7.What is the process for return or replacement of MAX975EUA?
All MAX975EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX975EUA, 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 part is unused and in its original packaging.
Return procedure for MAX975EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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