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Analog Devices Inc./Maxim Integrated MAX6854UK19D1+T
- Part No.:
- MAX6854UK19D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6854UK19D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
The MAX6854UK19D1+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, providing ultra-low 170nA typical supply current, factory-trimmed 1.9V reset threshold (±2.5%), and 10ms minimum reset timeout. It monitors VCC, accepts manual reset via MR input, and asserts an active-low open-drain RESET output-designed for reliable power-up/brownout protection in battery-powered medical and portable electronics.
For engineers reviewing the MAX6854UK19D1+T datasheet, MAX6854UK19D1+T pinout, MAX6854UK19D1+T application, or MAX6854UK19D1+T equivalent, this page delivers verified functional identity, validated pin roles, confirmed timing behavior, and real-world selection guidance for low-power µP reset supervision.
Technical Context
This device operates across VCC = 1.2V to 5.5V and guarantees valid RESET assertion down to VCC = 1.1V. Its internal voltage monitor triggers reset when VCC falls below 1.9V (VTH), with 0.5%VTH hysteresis and immunity to ≤40µs VCC transients at 100mV overdrive.
The MR input features 10kΩ internal pullup, 1µs minimum pulse width, and 200ns glitch rejection. RESET remains asserted for ≥10ms after VCC rises above VTH and MR deasserts, with open-drain output requiring external pullup and supporting logic-level translation up to 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typ at VCC = 1.8V - enables multi-year operation on coin-cell batteries |
| Reset Threshold | 1.9V ±2.5% - factory-trimmed for precise brownout detection at nominal 1.8V/1.9V rails |
| Reset Timeout | 10ms min (D1 option) - ensures µP initialization completes before release |
| VCC Range | 1.2V to 5.5V - supports single-cell Li-ion, NiMH, and 3.3V/5V systems |
| RESET Output Type | Active-low open-drain - allows level-shifting and wired-OR reset bus configuration |
| MR Input | Active-low with 10kΩ internal pullup - simplifies pushbutton reset without external components |
| Operating Temp | -40°C to +85°C - qualified for industrial and portable medical environments |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; requires external pullup; sinks current during reset assertion |
| 2 | GND | Ground reference for all internal circuitry and reset timing |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (10kΩ); initiates reset on logic low |
| 4 | GND | Second ground terminal - must be connected to same potential as Pin 2 for noise immunity |
| 5 | VCC | Supply voltage input monitored for reset; bypass with 0.1µF capacitor to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current enables >10-year battery life in glucose monitors |
| Guaranteed RESET validity | RESET remains functional down to VCC = 1.1V - critical for graceful shutdown in low-VCC brownout |
| No external components | Internal MR pullup, fixed reset threshold, and timeout eliminate BOM cost and layout area |
| Transient immunity | Immune to VCC glitches ≤40µs at 100mV overdrive - prevents spurious resets in noisy environments |
| Open-drain RESET | Supports mixed-voltage systems: pullup can connect to 1.8V, 3.3V, or 5V rail independent of VCC |
Applications
| Glucose Monitors | Patient Monitoring Devices |
|---|---|
Use Scenario: Continuous glucose sensing with Bluetooth LE transmission powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervises 1.8V analog front-end and BLE SoC power rails; asserts RESET during battery voltage sag below 1.9V. Use Value: Prevents corrupted sensor readings or BLE disconnects caused by undervoltage operation. |
Use Scenario: Portable ECG patch with ultra-low-power MCU and flash memory. IC Role / Device Role / Timing Role: Monitors main 3.3V supply and provides 10ms reset hold time to ensure flash write completion before boot. Use Value: Eliminates firmware corruption risk during power interruption or battery swap. |
| MP3 Players | Industrial Handheld Terminals |
Use Scenario: Flash-based audio player using single-cell Li-ion (2.7–4.2V range). IC Role / Device Role / Timing Role: Detects VCC drop below 1.9V during deep discharge; holds RESET until stable 2.7V+ is restored. Use Value: Avoids audio playback artifacts and file system errors during low-battery operation. |
Use Scenario: Ruggedized barcode scanner with ARM Cortex-M3 and 2.8V display driver. IC Role / Device Role / Timing Role: Provides MR-initiated reset via front-panel button and monitors 2.8V rail for brownout recovery. Use Value: Enables field-serviceable hard reset without opening enclosure or cycling power. |
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; push-pull active-low RESET | Designed for 3.3V systems only; lacks MR input and open-drain flexibility | Select when 3.3V rail supervision is primary need and MR functionality is handled externally |
| MAX6326UR29+T | 1.9V reset threshold; 1.6µA ICC; no MR input; 140ms timeout | Higher quiescent current limits battery life; no manual reset capability | Choose only if MR is unnecessary and longer timeout is acceptable for simpler designs |
Compared with MAX6854UK19D1+T, TPS3836K33DBVR offers tighter reset accuracy but no MR or open-drain output, while MAX6326UR29+T trades 10× higher ICC for reduced feature set-making MAX6854UK19D1+T optimal for MR-enabled, ultra-low-ICC 1.8V/1.9V applications.
Availability
MAX6854UK19D1+T is available at Aetrix Electronics and suitable for glucose monitors, patient monitoring devices, and MP3 players requiring stable component supply with long-term lifecycle support and lead-free compliance.
Supply support for MAX6854UK19D1+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 demanding industrial, medical, and portable applications.
The MAX6854 series belongs to Maxim's nanopower supervisory product line, engineered specifically for battery-critical systems where sub-µA ICC, guaranteed low-VCC operation, and integrated MR are mandatory.
FAQ
What is the exact reset threshold voltage of the MAX6854UK19D1+T?
The MAX6854UK19D1+T has a factory-trimmed reset threshold of 1.9V with ±2.5% tolerance over temperature (–40°C to +85°C). This value is confirmed in Table 2 (Threshold Suffix Guide) of the datasheet, where suffix "19" corresponds to 1.9V nominal VTH. The device guarantees valid reset assertion down to VCC = 1.1V, making it suitable for deep brownout detection in 1.8V systems.
Does the MAX6854UK19D1+T include a watchdog timer?
No, the MAX6854UK19D1+T does not include a watchdog timer. It belongs to the MAX6854/MAX6855/MAX6856 subgroup, which provides voltage monitoring and manual reset only. Watchdog functionality is exclusive to MAX6864–MAX6869 variants (e.g., MAX6864UK19D1S+T). The MAX6854UK19D1+T pinout and functional diagram confirm absence of WDI pin and watchdog circuitry.
What is the function of Pin 4 on the MAX6854UK19D1+T?
Pin 4 on the MAX6854UK19D1+T is a second GND terminal, not I.C. or CT. Per the MAX6854/MAX6855/MAX6856 Pin Description table and SOT23 top-view diagram, Pins 2 and 4 are both labeled GND and must be connected to the same ground potential to ensure noise immunity and proper internal reference stability. This dual-GND configuration reduces ground bounce in high-noise portable environments.
Can the MAX6854UK19D1+T drive a 3.3V microcontroller reset input?
Yes, the MAX6854UK19D1+T can drive a 3.3V µC reset input using its open-drain RESET output (Pin 1). Connect an external pullup resistor from Pin 1 to the 3.3V rail - the device sinks current during reset assertion and presents high-impedance otherwise. This level-shifting capability is explicitly supported per the "Interfacing to Other Voltages" section and Figure 4 in the datasheet.
What is the minimum pulse width required on the MR input of the MAX6854UK19D1+T?
The MR input of the MAX6854UK19D1+T requires a minimum pulse width of 1µs to reliably trigger reset, as specified in the Electrical Characteristics table under "MR Minimum Pulse Width (tMPW)". The device also provides 200ns glitch rejection, ensuring noise spikes shorter than this duration do not cause unintended resets - critical for robust pushbutton interfacing in handheld medical devices.
MAX6854UK19D1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.9V
- 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
MAX6854UK19D1+T FAQ
1.How can I place an order for MAX6854UK19D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6854UK19D1+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 MAX6854UK19D1+T reliable?
The price and inventory of MAX6854UK19D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6854UK19D1+T is usually 5 days.
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Once your MAX6854UK19D1+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 MAX6854UK19D1+T?
For technical support, including MAX6854UK19D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6854UK19D1+T requirements.
6.How does Aetrix verify that MAX6854UK19D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6854UK19D1+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 MAX6854UK19D1+T meets industry standards.
7.What is the process for return or replacement of MAX6854UK19D1+T?
All MAX6854UK19D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6854UK19D1+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 MAX6854UK19D1+T part is unused and in its original packaging.
Return procedure for MAX6854UK19D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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