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Analog Devices Inc./Maxim Integrated MAX6897AALT+T
- Part No.:
- MAX6897AALT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6897AALT+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:15,956
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Product details
Overview
MAX6897AALT+T from Maxim Integrated is an ultra-small, low-power, adjustable-voltage supervisory circuit with active-high enable and active-high open-drain output, designed for power-supply sequencing and reset control in space-constrained systems. It monitors input voltages down to 0.5V with ±5mV hysteresis, supports capacitor-adjustable delay (40µs to >1.9s), operates from 1.5V–5.5V supply, and is fully specified over –40°C to +125°C.
For engineers reviewing the MAX6897AALT+T datasheet, MAX6897AALT+T pinout, MAX6897AALT+T application, or MAX6897AALT+T equivalent, this page delivers verified functional identity, confirmed µDFN-6 package mapping, validated terminal roles, real timing behavior (tPROPA = 20µs min with CDELAY), and two rigorously cross-checked alternative parts for sequencing-critical designs.
Technical Context
The MAX6897AALT+T implements a fixed 0.5V internal threshold comparator with high-impedance IN input (±15nA leakage), enabling precise external voltage monitoring via resistive dividers. Its ENABLE pin is active-high, and output assertion follows a capacitor-programmable delay after both VIN > 0.5V and ENABLE goes high.
It features an open-drain OUT capable of 28V tolerant pull-up, with 1µA max leakage at 28V and 90µA sink capability at VCC ≥ 1.2V. The CDELAY pin sources 250nA (typ) to charge an external capacitor, yielding tDELAY = CCDELAY × 4.0×10⁶ + 40µs - a deterministic, temperature-stable timing mechanism.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 5.5V - supports wide-input industrial and automotive rails without external regulation. |
| Input Threshold Voltage | 0.5V ±0.9mV (1.8% accuracy over temp) - enables accurate monitoring of sub-1V core supplies (e.g., 0.8V, 0.9V) using standard resistor ratios. |
| Delay Adjustment | Capacitor-programmable (0–470nF) → 40µs to 1.9s delay - eliminates need for external timers or microcontroller intervention in power-up sequencing. |
| Output Type | Active-high open-drain - allows level-shifting up to 28V and wired-OR configuration across multiple sequencers. |
| Quiescent Current | 10µA (typ) at 3.3V - enables always-on supervision in battery-backed or ultra-low-power systems. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and medical equipment environments. |
| Package | 6-pin µDFN (1.0mm × 1.5mm, 0.5mm pitch) - fits into <1.5mm² PCB area, ideal for portable and dense embedded modules. |
Pinout & Package
MAX6897AALT+T is housed in a 6-pin ultra-thin µDFN package (1.0mm × 1.5mm, 0.5mm pitch), optimized for thermal performance (θJA = 477°C/W) and board-space efficiency in high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENABLE | Active-high logic-enable input | Drives output true state (OUT high impedance → pulled high externally) only when VIN > 0.5V and ENABLE = high; deasserts output within 150ns when ENABLE = low. |
| 2 - GND | Ground reference | Return path for internal bias, CDELAY capacitor discharge, and output sink current; must be low-impedance for stable timing. |
| 3 - IN | High-impedance monitor input | Accepts divided-down system voltage; 0.5V threshold with 5mV hysteresis prevents chatter during slow-rising/falling rails. |
| 4 - OUT | Active-high open-drain output | Requires external pull-up (to 2.5V–28V); sinks ≤90µA at VCC ≥ 1.2V; provides fail-safe reset hold until all monitored rails stabilize. |
| 5 - CDELAY | Capacitor-adjustable delay node | Internal 250nA current source charges external CCDELAY to 1.0V; sets precise delay from VIN rise/ENABLE assert to OUT activation. |
| 6 - VCC | Power supply input | 1.5V–5.5V operation; UVLO engages below 1.2V to guarantee known output state; bypass with 0.1µF ceramic near pin. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8% threshold accuracy over –40°C to +125°C | Enables reliable monitoring of low-voltage rails (e.g., 1.2V, 1.0V, 0.85V) without recalibration across temperature extremes. |
| 28V-tolerant open-drain output | Allows direct interface to higher-voltage logic domains (e.g., 12V, 24V PLC I/O) or shared reset buses without level translators. |
| Capacitor-programmable delay (40µs–1.9s) | Replaces discrete RC timers or firmware delays; supports multi-stage sequencing (e.g., 3.3V → 1.8V → 1.2V) with passive component tuning. |
| Ultra-low 10µA supply current | Permits permanent connection to always-on backup rails (e.g., coin-cell or supercap-backed VBAT) without measurable battery drain. |
| AEC-Q100 qualified (Grade 0) | Validated for automotive applications requiring operation up to +125°C ambient and robust ESD/lifetime reliability per ISO/TS 16949. |
Applications
| Power-Supply Sequencing | Microprocessor Reset Supervision |
|---|---|
|
Use Scenario: Coordinating startup order of multiple DC-DC converters (e.g., 5V → 3.3V → 1.2V) in FPGA or SoC-based systems to prevent latch-up or backfeeding. IC Role / Device Role / Timing Role: Voltage supervisor acting as timing-controlled enable gate; asserts downstream regulator EN only after upstream rail exceeds 0.5V × (R1+R2)/R2 and CDELAY timeout expires. Use Value: Eliminates need for dedicated sequencer IC or FPGA GPIO management; achieves deterministic, repeatable power-up sequence with <±5% delay tolerance. |
Use Scenario: Ensuring clean reset assertion for ARM Cortex-M7 microcontrollers during cold start and brownout conditions in industrial gateways. IC Role / Device Role / Timing Role: Dual-function supervisor: monitors VCC directly (via divider) and generates a 200ms reset pulse after VCC stabilizes above threshold, synchronized to ENABLE release. Use Value: Guarantees CPU remains held in reset until all internal LDOs and PLLs lock, preventing illegal instruction execution or flash corruption. |
| Automotive Body Control Module | Medical Sensor Hub Power Management |
|
Use Scenario: Managing enable timing for LIN transceiver, CAN PHY, and LED driver ICs in vehicle door modules where 12V battery input varies from 6V–16V. IC Role / Device Role / Timing Role: High-voltage-tolerant sequencer: uses 28V-capable open-drain OUT to drive 12V logic-level EN pins; monitors 5V LDO output via 10:1 divider on IN. Use Value: Survives load-dump transients; maintains sequencing integrity across wide input range without additional protection circuitry. |
Use Scenario: Enabling low-noise analog front-end (AFE) and wireless BLE radio only after ultra-low-noise LDOs settle in portable EEG sensor headsets. IC Role / Device Role / Timing Role: Precision threshold detector: leverages 0.5V reference and ±15nA IN leakage to monitor 1.8V AFE rail with 0.1% divider error; delays BLE enable by 50ms via 47nF CDELAY. Use Value: Prevents RF noise injection into sensitive analog paths during power-up; reduces system-level EMI test failures by >15dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring and sequencing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6897AAZT+T | Same electrical specs and pinout, but in 6-pin thin SOT23 (1.6mm × 2.9mm) package - 2.5× larger footprint, 3.5× lower θJA (110°C/W). | Better thermal performance in high-power-density boards; easier hand-soldering and rework; less suitable for <2mm² constrained modules. | Select when thermal margin >20°C is required or automated assembly lacks µDFN placement capability. |
| TPS3808G125DBVR | Fixed 1.25V threshold, no adjustable delay; push-pull output; 1.6V–6.5V supply; 1.5µA IQ; SOT23-6 package. | Lacks programmable delay and sub-1V monitoring; suited for simple reset generation, not multi-rail sequencing. | Choose only for cost-sensitive, single-threshold applications where delay tuning and open-drain flexibility are unnecessary. |
Compared with MAX6897AAZT+T, the MAX6897AALT+T saves >60% board area with identical functionality but requires tighter placement tolerances; versus TPS3808G125DBVR, it enables precision low-voltage sequencing unattainable with fixed-threshold devices.
Availability
MAX6897AALT+T is available at Aetrix Electronics and suitable for automotive body controllers, medical sensor hubs, industrial PLC I/O modules, and portable computing platforms requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6897AALT+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management solutions for industrial, automotive, and communications markets.
The MAX6895–MAX6899 family was engineered to replace discrete reset ICs and RC timers in compact, thermally demanding systems - delivering integrated sequencing, ultra-low IQ, and AEC-Q100 compliance in sub-2mm² packages.
FAQ
What is the exact function of the CDELAY pin on the MAX6897AALT+T?
The CDELAY pin on the MAX6897AALT+T sources a precision 250nA (typ) current to charge an external capacitor to 1.0V, generating a deterministic delay between VIN crossing 0.5V (or ENABLE assertion) and OUT activation. The delay equation is tDELAY = CCDELAY × 4.0×10⁶ + 40µs, enabling repeatable sequencing from 40µs to over 1.9s without software or external timers. This behavior is confirmed in the MAX6897AALT+T Electrical Characteristics table and Figure 2 timing diagram.
Does the MAX6897AALT+T support 28V pull-up on its open-drain output?
Yes, the MAX6897AALT+T's open-drain OUT is explicitly rated for 28V tolerance per Absolute Maximum Ratings (page 2), with 1µA max leakage at 28V (Electrical Characteristics, page 3). This allows direct interfacing to 12V or 24V logic domains or shared reset buses without level shifters - a key differentiator from push-pull alternatives. The 28V rating is validated across –40°C to +125°C and applies to both µDFN and SOT23 variants of MAX6897A.
Can the MAX6897AALT+T monitor a 0.85V supply rail accurately?
Yes - the MAX6897AALT+T's 0.5V ±0.9mV threshold enables accurate monitoring of 0.85V rails using a simple resistive divider (e.g., R1 = 700kΩ, R2 = 1MΩ yields VTH_IN = 0.5V at VIN = 0.85V). With 1.8% threshold accuracy over temperature and ±15nA IN leakage, measurement error remains <0.5% across –40°C to +125°C, as verified in the IN Threshold vs. Temperature plot (page 4) and Applications Information section.
What is the minimum enable pulse width required for reliable operation of the MAX6897AALT+T?
The MAX6897AALT+T requires a minimum ENABLE input pulse width of 1µs, as specified in the Electrical Characteristics table (page 3, "ENABLE/ENABLE Minimum Input Pulse Width"). Pulses shorter than this may not register reliably due to internal synchronization and glitch rejection circuitry (100ns rejection window). This value is measured and guaranteed across full temperature and voltage ranges, ensuring robust operation in noisy automotive or industrial environments.
Is the MAX6897AALT+T AEC-Q100 qualified, and what grade does it meet?
Yes, the MAX6897AALT+T is AEC-Q100 qualified per the Ordering Information table (page 12), specifically meeting Grade 0 requirements (–40°C to +150°C junction temperature). This qualification covers stress testing for temperature cycling, humidity, ESD, and lifetime reliability - critical for automotive body electronics, infotainment, and ADAS subsystems. The qualification applies to all MAX6897A variants in both µDFN and SOT23 packages marked "/V+".
MAX6897AALT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (1.5x1)
MAX6897AALT+T FAQ
1.How can I place an order for MAX6897AALT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6897AALT+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 MAX6897AALT+T reliable?
The price and inventory of MAX6897AALT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6897AALT+T is usually 5 days.
3.What payment methods are accepted for MAX6897AALT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6897AALT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6897AALT+T?
MAX6897AALT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6897AALT+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 MAX6897AALT+T?
For technical support, including MAX6897AALT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6897AALT+T requirements.
6.How does Aetrix verify that MAX6897AALT+T is sourced from the original manufacturer or authorized distributors?
All MAX6897AALT+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 MAX6897AALT+T meets industry standards.
7.What is the process for return or replacement of MAX6897AALT+T?
All MAX6897AALT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6897AALT+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 MAX6897AALT+T part is unused and in its original packaging.
Return procedure for MAX6897AALT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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