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Analog Devices Inc./Maxim Integrated MAX965EUA-T
- Part No.:
- MAX965EUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX965EUA-T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
The MAX965EUA-T from Maxim Integrated is a single, micropower, rail-to-rail input/output comparator with integrated 1.235V ±1.5% reference and programmable hysteresis. It operates from +1.6V to +5.5V, draws only 7.0µA (typ) supply current, features open-drain output capable of swinging beyond VCC up to +6V, and is rated for -40°C to +85°C. It is used in ultra-low-voltage threshold detection within 2-cell battery-powered portable systems.
For engineers reviewing the MAX965EUA-T datasheet, MAX965EUA-T pinout, MAX965EUA-T application, or MAX965EUA-T equivalent, key selection criteria include its 1.6V minimum supply voltage, 10µs propagation delay at 50mV overdrive, ±1mV typical input hysteresis, rail-to-rail common-mode input range (-0.25V to VCC), and compatibility with voltage-level translation across mixed-supply domains.
Technical Context
The MAX965EUA-T implements a precision bandgap reference core delivering 1.235V ±1.5% over 0°C to +85°C and ±2.5% over -40°C to +85°C, with REF pin sourcing up to 50µA. Its comparator stage uses ultra-low-power input circuitry enabling rail-to-rail operation down to 1.6V while maintaining sub-6mV input offset voltage (µMAX package, -40°C to +85°C).
Hysteresis is programmable via the HYST pin using external resistors between REF and GND, supporting bands from ±1mV to ±50mV; internal hysteresis remains fixed when HYST is tied to REF. The open-drain output supports pull-up to voltages up to +6V independent of VCC, enabling direct interfacing with higher-voltage logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - Enables direct operation from 2-cell alkaline/NiMH or single Li-ion batteries without regulation. |
| Quiescent Supply Current | 7.0µA (typ) - Supports multi-year battery life in always-on sensing applications. |
| Input Offset Voltage | 6.0mV (max, -40°C to +85°C, µMAX) - Ensures reliable threshold detection accuracy across industrial temperature range. |
| Propagation Delay | 10µs (50mV overdrive) - Sufficient speed for low-frequency monitoring (e.g., battery voltage, supply rails). |
| Reference Voltage Accuracy | ±1.5% (0°C to +85°C), ±2.5% (-40°C to +85°C) - Provides stable trip-point calibration without external references. |
| Output Sink Capability | 10mA (min, VCC = 2V) - Drives standard LED indicators or logic inputs with 100kΩ pull-up. |
| Common-Mode Input Range | -0.25V to VCC - Accepts inputs below ground or up to rail, simplifying sensor interface design. |
Pinout & Package
MAX965EUA-T is housed in an 8-pin µMAX® package (U8-1), measuring 3.0mm × 3.0mm × 1.1mm with exposed pad for thermal enhancement. Pin 1 is OUT, pin 2 is VCC, pin 3 is GND, pin 4 is N.C., pin 5 is IN+, pin 6 is IN-, pin 7 is HYST, and pin 8 is REF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Open-drain comparator output | Requires external pull-up; sinks current to GND when active; supports level-shifting up to +6V. |
| VCC (Pin 2) | Positive supply input | Accepts +1.6V to +5.5V; powers both comparator and internal reference. |
| GND (Pin 3) | Ground reference | Return path for all internal circuits and REF output; must be low-impedance. |
| N.C. (Pin 4) | No connection | Not internally bonded; leave unconnected or tie to GND for mechanical stability. |
| IN+ (Pin 5) | Noninverting input | Rail-to-rail capable; accepts signals from -0.25V to VCC; high-impedance (>10¹²Ω). |
| IN- (Pin 6) | Inverting input | Same rail-to-rail range and impedance as IN+; used with IN+ to set threshold polarity. |
| HYST (Pin 7) | Hysteresis programming input | Accepts voltage from (REF − 50mV) to REF; sets hysteresis band when external resistors are connected. |
| REF (Pin 8) | Internal reference output | Provides 1.235V ±1.5% (0°C to +85°C); sources up to 50µA; bypass with 0.1µF capacitor for noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O operation | Enables direct interface with sensors and logic families operating at different supply rails without level-shifters. |
| Programmable hysteresis (±1mV to ±50mV) | Eliminates noise-induced oscillation in slow-moving or noisy analog signals without external op-amp feedback networks. |
| Integrated 1.235V ±1.5% reference | Removes need for external voltage reference IC or resistor divider, reducing BOM count and layout area. |
| Ultra-low 7.0µA supply current | Extends battery life in portable medical monitors, wearables, and IoT endpoint sensors requiring continuous monitoring. |
| Open-drain output with +6V tolerance | Allows direct connection to 3.3V, 5V, or even 12V logic buses using a single pull-up resistor. |
Applications
| 2-Cell Battery Monitoring | Window Comparator |
|---|---|
Use Scenario: Monitoring voltage decay of two AA/AAA cells powering a handheld meter to trigger low-battery alert before cutoff. IC Role / Device Role / Timing Role: Single comparator compares battery voltage against 1.235V reference to detect <1.6V threshold. Use Value: Eliminates external reference and reduces quiescent current to <10µA, extending operational life by >30% vs. discrete solutions. |
Use Scenario: Detecting if system supply voltage remains within safe operating window (e.g., 3.0V–3.6V) in automotive body control modules. IC Role / Device Role / Timing Role: MAX965EUA-T used in conjunction with second comparator (e.g., MAX966) to form asymmetric window detector. Use Value: Programmable hysteresis prevents chatter near trip points; rail-to-rail inputs accommodate full 0–5V supply swing. |
| Mobile Communications Threshold Detection | Ground/Supply-Sensing Interface |
Use Scenario: Validating RF power amplifier enable signal integrity in Bluetooth/Wi-Fi modules during sleep/wake transitions. IC Role / Device Role / Timing Role: Comparator detects rising edge of bias control voltage relative to internal 1.235V reference. Use Value: 10µs propagation delay ensures timely enablement; 1.6V operation allows direct use from LDO outputs without additional regulation. |
Use Scenario: Sensing ground lift or supply sag in industrial PLC I/O modules where ground potential may shift under load. IC Role / Device Role / Timing Role: IN- tied to system ground, IN+ referenced to VCC via resistor divider; detects deviation >±50mV. Use Value: Rail-to-rail input range (-0.25V to VCC) captures sub-ground excursions; open-drain output interfaces directly with isolated digital inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDBVR | No internal reference; 360nA supply current; 15µs propagation delay; no hysteresis pin. | Suitable for ultra-low-power wake-up detection but requires external reference and hysteresis network. | Choose TLV3691IDBVR only when <1µA supply current is mandatory and reference/hysteresis can be added externally. |
| MAX9060AXK+T | Includes internal 1.2V reference; 1.2µA supply current; no hysteresis pin; SC70-5 package. | Lower power and smaller footprint, but lacks programmable hysteresis and open-drain output voltage tolerance beyond VCC. | Choose MAX9060AXK+T for space-constrained, low-noise threshold detection where hysteresis is fixed or unnecessary. |
Compared with TLV3691IDBVR and MAX9060AXK+T, the MAX965EUA-T uniquely combines integrated reference, programmable hysteresis, and +6V-tolerant open-drain output in a single 8-pin µMAX package-enabling complete threshold detection functionality with zero external passive components beyond pull-up and hysteresis resistors.
Availability
MAX965EUA-T is available at Aetrix Electronics and suitable for 2-cell battery-powered systems, portable medical devices, and industrial supply-monitoring applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX965EUA-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 industrial, medical, communications, and consumer applications.
The MAX965EUA-T belongs to the MAX965–MAX970 family of micropower comparators engineered specifically for ultra-low-voltage, battery-critical systems where rail-to-rail operation, integrated reference, and programmable hysteresis reduce system complexity and power consumption.
FAQ
What is the minimum operating supply voltage for the MAX965EUA-T?
The MAX965EUA-T is fully specified for operation down to +1.6V. While it may function at lower voltages (down to ~1.0V), performance degrades: reference accuracy falls outside specification, propagation delay increases, and output sink capability diminishes. For guaranteed operation per datasheet, maintain VCC ≥ +1.6V. The MAX965EUA-T datasheet specifies 1.6V as the absolute minimum for full parameter compliance across -40°C to +85°C.
Does the MAX965EUA-T require an external reference for basic comparator operation?
No. The MAX965EUA-T includes an internal 1.235V ±1.5% bandgap reference accessible on the REF pin (Pin 8). This reference can be used directly as the threshold voltage for IN- or IN+, eliminating the need for external resistive dividers or reference ICs in many applications. The MAX965EUA-T datasheet confirms REF is functional across the full supply range (+1.6V to +5.5V) and temperature range (-40°C to +85°C).
Can the MAX965EUA-T drive a 5V logic input when powered from a 3V supply?
Yes. The MAX965EUA-T features an open-drain output (Pin 1) that can be pulled up to any voltage up to +6V, independent of its VCC supply. When powered from 3V, connecting a pull-up resistor from OUT to a 5V rail enables direct TTL/CMOS-compatible output signaling. The MAX965EUA-T datasheet explicitly states "open-drain outputs that can be pulled beyond VCC to 6V (max) above ground", confirming this capability.
How is hysteresis programmed on the MAX965EUA-T?
Hysteresis is programmed by connecting two external resistors between REF (Pin 8), HYST (Pin 7), and GND (Pin 3). This creates a voltage divider that sets the HYST pin voltage, determining hysteresis magnitude from ±1mV to ±50mV. If not used, HYST must be tied directly to REF. The MAX965EUA-T datasheet provides exact formulas and example calculations in the "Adding Hysteresis" section, confirming this method is exclusive to MAX965/MAX967/MAX968/MAX969 variants.
What package type and dimensions does the MAX965EUA-T use?
The MAX965EUA-T uses the 8-pin µMAX® package (package code U8-1), measuring 3.0mm × 3.0mm × 1.1mm with an exposed thermal pad. It is RoHS-compliant and pin-compatible with other MAX965 variants in the same package, such as MAX965ESA. The MAX965EUA-T datasheet confirms this package in the Ordering Information table and provides land pattern details in the Package Information section.
MAX965EUA-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:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.6V ~ 5.5V
- :
- 15mV @ 5.5V
- Voltage - Input Offset (Max):
- 0.05µA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 12µA
- Current - Quiescent (Max):
- 56.48dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 20µs
- Propagation Delay (Max):
- ±1mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX965EUA-T FAQ
1.How can I place an order for MAX965EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX965EUA-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 MAX965EUA-T reliable?
The price and inventory of MAX965EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX965EUA-T is usually 5 days.
3.What payment methods are accepted for MAX965EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX965EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX965EUA-T?
MAX965EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX965EUA-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 MAX965EUA-T?
For technical support, including MAX965EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX965EUA-T requirements.
6.How does Aetrix verify that MAX965EUA-T is sourced from the original manufacturer or authorized distributors?
All MAX965EUA-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 MAX965EUA-T meets industry standards.
7.What is the process for return or replacement of MAX965EUA-T?
All MAX965EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX965EUA-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 MAX965EUA-T part is unused and in its original packaging.
Return procedure for MAX965EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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