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Analog Devices Inc./Maxim Integrated MAX6854UK23D1+
- Part No.:
- MAX6854UK23D1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6854UK23D1+.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,396
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Product details
Overview
MAX6854UK23D1+ from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 2.313V reset threshold (suffix D1), and 10ms minimum reset timeout period. It monitors VCC, asserts active-low reset on undervoltage or manual reset assertion, and guarantees valid reset output down to VCC = +1.1V - ideal for battery-powered glucose monitors and portable medical devices.
For engineers reviewing the MAX6854UK23D1+ datasheet, MAX6854UK23D1+ pinout, MAX6854UK23D1+ application, or MAX6854UK23D1+ equivalent, key selection criteria include its 2.313V threshold accuracy (±2.5%), immunity to short VCC transients (<40µs at 100mV overdrive), push-pull active-low reset output, and compatibility with 1.2V–5.5V supply rails in space-constrained embedded systems.
Technical Context
The MAX6854UK23D1+ integrates voltage monitoring, manual reset input (MR), and fixed-timing reset timeout generator - but no watchdog timer (excluded per Selector Guide). Its internal 10kΩ MR pullup enables direct switch-to-GND implementation without external components, and its reset assertion logic ensures monotonic behavior during brownout recovery with guaranteed tRD ≤ 40µs.
Designed for single-supply monitoring only, it uses a precision bandgap reference to maintain ±2.5% threshold tolerance over -40°C to +85°C, and its push-pull RESET output drives low with VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.12V), supporting direct interface to 1.8V/2.5V/3.3V µP reset inputs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.313V ±2.5% - precisely matches 2.3V rail monitoring for low-power microcontrollers in portable health devices. |
| Supply Current | 170nA typ at +25°C - enables multi-year battery life in coin-cell–powered patient monitors. |
| Reset Timeout | 10ms min - sufficient for µP power-up stabilization while minimizing system boot delay. |
| VCC Operating Range | 1.2V to 5.5V - supports operation across Li-ion, alkaline, and regulated 1.8V/3.3V domains. |
| Reset Valid Down To | VCC = +1.1V - ensures reliable reset assertion even during deep brownout conditions. |
| MR Input Logic | Active-low, internally pulled up to VCC via 10kΩ - allows momentary switch or open-drain driver without external biasing. |
| Output Type | Push-pull active-low RESET - eliminates need for external pullup resistor and reduces BOM count. |
Pinout & Package
Package: 5-pin SOT23-5 (lead-free, +T suffix), footprint-compatible with industry-standard 5-lead SOT-23 layouts and reflow-process ready.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; sinks up to 1.2mA at VCC ≥ 2.12V; asserts low during VCC < 2.313V or MR low. |
| 2 | GND | Ground reference for all internal circuitry; must be connected to system ground plane with low-impedance path. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (10kΩ); accepts CMOS-level signals or mechanical switch to GND. |
| 4 | GND | Second ground terminal - electrically tied to Pin 2 internally; improves noise immunity in high-noise environments. |
| 5 | VCC | Supply input and monitored voltage rail; requires 0.1µF ceramic bypass capacitor to GND for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current enables >10-year battery life in always-on wearable sensors. |
| No external components | Integrated MR pullup, precision threshold, and timeout generator eliminate discrete resistors/capacitors. |
| VCC transient immunity | Immune to ≤40µs VCC glitches at 100mV overdrive - prevents spurious resets in noisy power environments. |
| Guaranteed reset validity | RESET remains functional down to VCC = +1.1V - critical for fail-safe operation during deep brownout. |
| SOT23-5 footprint | Small 2.9mm × 1.6mm outline saves PCB area in compact medical and portable electronics. |
Applications
| Glucose Monitoring Systems | Patient Vital Sign Monitors |
|---|---|
|
Use Scenario: Continuous glucose meters powered by CR2032 coin cell with 1.8V µP and analog front-end. IC Role / Device Role / Timing Role: Supervises 1.8V supply rail and provides clean reset pulse at power-up and brownout. Use Value: 170nA ICC extends battery life beyond 2 years; 2.313V threshold aligns with 1.8V µP's VDDIO tolerance margin. |
Use Scenario: Portable ECG/SpO₂ monitor using ARM Cortex-M0+ MCU with dual 3.3V/1.2V supplies. IC Role / Device Role / Timing Role: Monitors primary 3.3V domain and asserts reset if voltage sags below safe operating level. Use Value: 10ms timeout ensures full µP initialization before firmware execution; push-pull output avoids pullup resistor on dense PCB. |
| Wireless Pulse Oximeters | Handheld Diagnostic Tools |
|
Use Scenario: Bluetooth LE–enabled pulse oximeter with intermittent sensor activation and sleep-mode optimization. IC Role / Device Role / Timing Role: Provides deterministic reset upon wake-up from deep-sleep when VCC ramps from 0V. Use Value: Valid RESET down to VCC = +1.1V guarantees reset assertion even during partial battery discharge. |
Use Scenario: Field-deployable diagnostic tool with replaceable AA batteries and ruggedized enclosure. IC Role / Device Role / Timing Role: Detects voltage collapse during cold-temperature battery discharge and initiates controlled shutdown. Use Value: Immunity to 40µs transients prevents false resets caused by motor-driven actuator switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K33DBVR | Fixed 3.08V reset threshold; 200nA ICC; SOT23-5; no MR input. | Lacks manual reset - unsuitable where field-service reset or test-mode entry is required. | Select only if 3.08V threshold matches system rail and MR functionality is unnecessary. |
| STM6315RWX6F | 2.93V threshold; 1.5µA ICC; 140ms timeout; push-pull active-low; includes watchdog. | Higher ICC and longer timeout reduce battery life and increase boot latency vs. MAX6854UK23D1+. | Prefer MAX6854UK23D1+ for ultra-low-power, fast-reset applications where watchdog is not needed. |
Compared with TPS3836K33DBVR and STM6315RWX6F, the MAX6854UK23D1+ delivers the lowest ICC (170nA), tightest threshold match for 2.3V rails (2.313V), and shortest configurable timeout (10ms), making it optimal for long-life, low-voltage medical wearables requiring manual reset capability.
Availability
MAX6854UK23D1+ is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign recorders, wireless pulse oximeters, and handheld diagnostic tools requiring stable component supply across extended production lifecycles.
Supply support for MAX6854UK23D1+ 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, medical, and communications applications.
The MAX6854UK23D1+ belongs to Maxim's nanopower µP supervisory family, engineered specifically for battery-critical portable medical electronics requiring guaranteed reset integrity at ultra-low quiescent current.
FAQ
What is the exact reset threshold voltage of MAX6854UK23D1+?
The MAX6854UK23D1+ has a factory-trimmed reset threshold of 2.313V, with ±2.5% tolerance over -40°C to +85°C. This value is confirmed in Table 2 (Threshold Suffix Guide) of the datasheet, where suffix "23" corresponds to 2.313V nominal. The MAX6854UK23D1+ maintains this accuracy without external calibration or trimming components.
Does MAX6854UK23D1+ include a watchdog timer function?
No, the MAX6854UK23D1+ does not include a watchdog timer. Per the Selector Guide and Pin Configurations section, only MAX6864–MAX6869 variants feature WDI input; MAX6854 series parts like MAX6854UK23D1+ provide voltage monitoring and manual reset only. Its functional scope is strictly VCC supervision and MR-triggered reset.
What is the reset timeout period for MAX6854UK23D1+?
The MAX6854UK23D1+ has a 10ms minimum reset timeout period (suffix D1), with typical value 15ms and maximum 25ms. This is specified in Table 4 (Reset Timeout Periods) and applies after VCC rises above 2.313V or MR is deasserted. The timeout is fixed - not pin-selectable - unlike MAX6861/MAX6862/MAX6863 variants.
Can MAX6854UK23D1+ operate with a 1.2V supply?
Yes, MAX6854UK23D1+ operates from VCC = 1.2V to 5.5V, 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 MAX6854UK23D1+ suitable for ultra-low-voltage systems such as energy-harvesting sensors.
Is MAX6854UK23D1+ pin-compatible with other supervisory ICs?
MAX6854UK23D1+ is pin-compatible with TPS3836/TPS3837/TPS3838 series per the Features section, sharing identical 5-pin SOT23 layout and push-pull active-low RESET output. However, threshold voltage (2.313V vs. 3.08V/3.3V) and ICC (170nA vs. ~200nA) differ - direct substitution requires validation of reset timing and voltage margin in the target application.
MAX6854UK23D1+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Strip
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.313V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 10ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6854UK23D1+ FAQ
1.How can I place an order for MAX6854UK23D1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6854UK23D1+ 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 MAX6854UK23D1+ reliable?
The price and inventory of MAX6854UK23D1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6854UK23D1+ is usually 5 days.
3.What payment methods are accepted for MAX6854UK23D1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6854UK23D1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6854UK23D1+?
MAX6854UK23D1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6854UK23D1+ 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 MAX6854UK23D1+?
For technical support, including MAX6854UK23D1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6854UK23D1+ requirements.
6.How does Aetrix verify that MAX6854UK23D1+ is sourced from the original manufacturer or authorized distributors?
All MAX6854UK23D1+ 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 MAX6854UK23D1+ meets industry standards.
7.What is the process for return or replacement of MAX6854UK23D1+?
All MAX6854UK23D1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6854UK23D1+, 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 MAX6854UK23D1+ part is unused and in its original packaging.
Return procedure for MAX6854UK23D1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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