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Analog Devices Inc./Maxim Integrated MAX6854UK26D3+T
- Part No.:
- MAX6854UK26D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6854UK26D3+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,165
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Product details
Overview
The MAX6854UK26D3+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, a factory-trimmed 2.625V reset threshold (suffix "26"), and a 150ms minimum reset timeout period (suffix "D3"). It provides active-low push-pull reset output, manual reset input (MR), and voltage monitoring for brownout detection - deployed in battery-powered glucose monitors and portable medical devices.
For engineers reviewing the MAX6854UK26D3+T datasheet, MAX6854UK26D3+T pinout, MAX6854UK26D3+T application, or MAX6854UK26D3+T equivalent, this page delivers verified functional identity, exact pin roles, confirmed timing behavior, and validated alternative options for low-power µP reset supervision in space-constrained, long-life systems.
Technical Context
This device implements a precision bandgap-based voltage monitor with 2.5% threshold accuracy over –40°C to +85°C, coupled to a digital timeout counter that holds RESET asserted for ≥150ms after VCC rises above 2.625V and MR deasserts. Its internal 10kΩ MR pullup and glitch rejection (200ns) enable direct switch interfacing without external components.
The reset assertion logic is fully asynchronous: RESET activates on VCC falling below 2.625V, MR low, or (in watchdog variants) WDI timeout - but MAX6854UK26D3+T excludes watchdog functionality, distinguishing it from MAX6864–MAX6869 family members. Guaranteed RESET validity down to VCC = 1.1V ensures reliable operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.625V (factory-trimmed, ±2.5% tolerance); sets precise brownout detection point for 2.7V–3.3V logic rails |
| Reset Timeout Period | 150ms (min); ensures µP completes power stabilization and initialization before release |
| Supply Current | 170nA (typ at +25°C); enables >10-year battery life in coin-cell–powered patient monitors |
| Operating Voltage Range | 1.2V to 5.5V; supports single-cell Li-ion, alkaline, and multi-rail embedded systems |
| RESET Output Type | Active-low push-pull; drives directly into µP reset pin without external pullup or level-shifting |
| VCC Validity Limit | Guaranteed RESET assertion down to VCC = 1.1V; prevents spurious release during final voltage collapse |
| MR Input Behavior | Active-low with 10kΩ internal pullup; accepts CMOS logic or momentary switch; 250ns MR-to-RESET delay |
Pinout & Package
Package: 5-pin SOT23-5 (lead-free, RoHS-compliant), 2.9mm × 1.6mm footprint, 1.1mm height - optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull output; sinks ≥50µA at VCC ≥ 1.1V; asserts when VCC < 2.625V or MR low |
| 2, 4 | GND | Ground reference for all internal circuits; must connect to system ground plane with low-inductance path |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (10kΩ); 1µs minimum pulse width accepted |
| 5 | VCC | Primary supply input and monitored rail; requires 0.1µF ceramic bypass capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current enables >10-year operation on CR2032 coin cell in standby mode |
| No external components | Integrated MR pullup, precision voltage reference, and timeout counter eliminate BOM cost and layout area |
| Immunity to short VCC transients | Rejects ≤40µs glitches at 100mV overdrive - prevents false resets in noisy automotive or industrial environments |
| Guaranteed RESET down to 1.1V | Ensures deterministic reset hold until complete power collapse, critical for data integrity in medical logging |
| SOT23-5 compatibility | Pins match industry-standard footprint; enables drop-in replacement of TPS3836/TPS3837/TPS3838 in existing designs |
Applications
| Glucose Monitoring Systems | Patient Vital Sign Loggers |
|---|---|
|
Use Scenario: Continuous glucose meters powered by single AAA alkaline cells operating 3–5 years between battery changes. IC Role / Device Role / Timing Role: Supervises 3.0V main rail; asserts RESET during battery sag below 2.625V to prevent corrupted sensor calibration writes. Use Value: 170nA quiescent current extends usable battery life by 22% versus 500nA alternatives; 150ms timeout ensures ADC and RF startup completion. |
Use Scenario: Portable ECG/SpO₂ recorders with flash memory storage requiring guaranteed power-fail write abort. IC Role / Device Role / Timing Role: Monitors 3.3V system rail; triggers hardware reset before VCC drops below 2.625V to halt memory writes mid-cycle. Use Value: RESET validity to 1.1V guarantees reset assertion even during final 200ms of battery depletion, preventing flash corruption. |
| Wireless Sensor Nodes | Industrial Handheld Scanners |
|
Use Scenario: LoRaWAN soil moisture sensors deployed in remote fields, powered by Li-SOCl₂ primary cells. IC Role / Device Role / Timing Role: Provides brownout protection for ARM Cortex-M0+ MCU; MR pin enables field technician-initiated firmware recovery via button press. Use Value: 250ns MR-to-RESET delay and 200ns glitch rejection allow direct switch connection without debounce RC network - saving 2 BOM items. |
Use Scenario: Rugged barcode scanners used in warehouse cold storage (–20°C to +60°C), powered by rechargeable Li-ion packs. IC Role / Device Role / Timing Role: Supervises 3.6V battery rail; detects voltage droop during motor-driven scan actuation to prevent MCU lockup. Use Value: 2.5% threshold accuracy over temperature ensures consistent trip point across full operating range - eliminating calibration drift errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K26DBVR | 2.63V threshold, 200ms timeout, 1.8µA ICC - 10× higher supply current than MAX6854UK26D3+T | Higher ICC limits use in >5-year battery applications; identical SOT23-5 pinout and reset behavior | Select when legacy TI design reuse is prioritized over ultra-low-power optimization |
| STM6315SW13FD | 2.63V threshold, 140ms timeout, 350nA ICC - 2× higher supply current, wider timeout tolerance (±20%) | Looser timing specs acceptable in non-critical consumer electronics; requires external MR pullup | Select when dual-source strategy mandates STMicroelectronics qualification, accepting 15% ICC penalty |
Compared with TPS3836K26DBVR and STM6315SW13FD, the MAX6854UK26D3+T delivers the lowest ICC (170nA) and tightest threshold accuracy (±2.5%), making it optimal for medical-grade battery longevity and precision brownout response - though its non-watchdog architecture excludes fault-detection use cases.
Availability
MAX6854UK26D3+T is available at Aetrix Electronics and suitable for glucose monitors, patient loggers, wireless sensor nodes, and industrial handheld scanners requiring stable component supply across extended product lifecycles.
Supply support for MAX6854UK26D3+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 and mixed-signal ICs for demanding industrial, medical, and communications applications - emphasizing low power, high reliability, and small form factor.
The MAX6854/MAX6855/MAX6856 series targets ultra-low-power microprocessor supervision in battery-critical systems, delivering nanopower operation, factory-trimmed thresholds, and integrated reset timing without external components.
FAQ
What is the exact reset threshold voltage of the MAX6854UK26D3+T?
The MAX6854UK26D3+T has a factory-trimmed reset threshold voltage of 2.625V, with guaranteed tolerance of ±2.5% over –40°C to +85°C. This value is fixed per the "26" suffix in the part number and is confirmed in Table 2 (Threshold Suffix Guide) of the official datasheet. The MAX6854UK26D3+T does not support adjustable or user-programmable thresholds.
Does the MAX6854UK26D3+T include a watchdog timer function?
No, the MAX6854UK26D3+T does not include a watchdog timer. It belongs to the base MAX6854/MAX6855/MAX6856 subgroup, which provides only voltage monitoring and manual reset functionality. Watchdog capability is exclusive to MAX6864–MAX6869 variants (denoted by "S" or "L" suffixes), as confirmed in the Selector Guide and Pin Configurations section of the datasheet.
What is the reset timeout period for the MAX6854UK26D3+T, and is it adjustable?
The MAX6854UK26D3+T has a fixed minimum reset timeout period of 150ms, indicated by the "D3" suffix. This value is not adjustable - unlike MAX6861–MAX6863 variants, which feature a CT pin for selecting between 10ms and 150ms timeouts. The 150ms duration is guaranteed across temperature and supply voltage per Table 4 (Reset Timeout Periods).
What output type does the MAX6854UK26D3+T provide, and how is it configured?
The MAX6854UK26D3+T provides an active-low push-pull RESET output (Pin 1), as specified in the MAX6854/MAX6856 column of the Pin Description table. This configuration drives the reset line directly without requiring an external pullup resistor and is compatible with standard µP reset inputs expecting active-low assertion.
Can the MAX6854UK26D3+T operate reliably at VCC = 1.2V?
Yes, the MAX6854UK26D3+T is fully specified to operate at VCC = 1.2V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Its RESET output remains valid down to VCC = 1.1V, and supply current is characterized at 1.2V (190nA typ). This makes it suitable for single-cell lithium or alkaline systems where rail voltage decays below 1.8V.
MAX6854UK26D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6854UK26D3+T FAQ
1.How can I place an order for MAX6854UK26D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6854UK26D3+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 MAX6854UK26D3+T reliable?
The price and inventory of MAX6854UK26D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6854UK26D3+T is usually 5 days.
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Once your MAX6854UK26D3+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 MAX6854UK26D3+T?
For technical support, including MAX6854UK26D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6854UK26D3+T requirements.
6.How does Aetrix verify that MAX6854UK26D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6854UK26D3+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 MAX6854UK26D3+T meets industry standards.
7.What is the process for return or replacement of MAX6854UK26D3+T?
All MAX6854UK26D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6854UK26D3+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 MAX6854UK26D3+T part is unused and in its original packaging.
Return procedure for MAX6854UK26D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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