My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6856UK23D3+T
- Part No.:
- MAX6856UK23D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6856UK23D3+T.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,227
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6856UK23D3+T 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 (±2.5%), and 150ms minimum reset timeout period. It monitors VCC, provides manual reset input (MR), and asserts an active-low open-drain RESET output - designed for reliable power-on reset and brownout protection in battery-critical portable systems.
For engineers reviewing the MAX6856UK23D3+T datasheet, MAX6856UK23D3+T pinout, MAX6856UK23D3+T application, or MAX6856UK23D3+T equivalent, this device is selected when low-quiescent-current supervision with open-drain reset output, precise 2.313V threshold, and 150ms timeout are required - especially where space-constrained SOT23-5 layout and guaranteed reset validity down to VCC = +1.1V matter.
Technical Context
The MAX6856UK23D3+T implements a voltage-monitoring comparator with hysteresis (0.5% of VTH), a fixed-reset-timeout timer (D3 = 150ms min), and MR input with 10kΩ internal pullup and 250ns MR-to-reset delay. It lacks watchdog timer and CT select input - distinguishing it from MAX6864–MAX6869 and MAX6861–MAX6863 variants.
Its open-drain RESET output requires external pullup and supports logic-level interfacing across 0–5.5V domains; reset assertion is guaranteed valid down to VCC = +1.1V, and immunity to short VCC transients (e.g., ≤40µs at 100mV overdrive) is characterized per Typical Operating Characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typical at VCC = 1.8V - enables multi-year operation on coin-cell batteries without compromising supervision reliability. |
| Reset Threshold Voltage | 2.313V ±2.5% - factory-trimmed for precision monitoring of 2.3V–2.4V rails (e.g., Li-ion battery discharge cutoff or low-voltage logic supplies). |
| Reset Timeout Period | 150ms minimum (D3 option) - ensures µP reset hold time exceeds boot initialization duration in most embedded microcontrollers. |
| RESET Output Type | Active-low open-drain - allows level-shifting, wired-OR reset bus sharing, and compatibility with diverse µP reset input logic families. |
| Operating Voltage Range | 1.2V to 5.5V - supports supervision of sub-1.8V logic rails (e.g., 1.2V/1.5V cores) while maintaining valid reset down to VCC = +1.1V. |
| MR Input Behavior | Active-low with 10kΩ internal pullup - eliminates external biasing; accepts CMOS logic or open-drain drive; 1µs minimum pulse width. |
| VCC Transient Immunity | Immune to ≤40µs transients at 100mV overdrive - prevents false resets during switching noise or load-dump events in portable systems. |
Pinout & Package
MAX6856UK23D3+T is housed in a lead-free 5-pin SOT23-5 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output - requires external pullup resistor; sinks current only when asserted; compatible with 0–5.5V logic domains. |
| 2 | GND | Ground reference - must be connected to system ground plane; shared return path for all internal circuitry. |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC (10kΩ); initiates reset when driven low; 250ns propagation delay to RESET. |
| 4 | GND | Second ground terminal - electrically tied to Pin 2 internally; improves noise immunity and thermal dissipation in high-reliability designs. |
| 5 | VCC | Supply voltage input - monitored for reset generation; bypass with 0.1µF capacitor to GND for noise rejection; valid from 1.2V to 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current - extends battery life in glucose monitors and wearables beyond 5 years on CR2032 cells. |
| Precision VTH | 2.313V ±2.5% factory-trimmed threshold - eliminates need for external resistor divider calibration in production test. |
| Open-drain RESET | Supports multi-source reset buses and voltage-level translation - simplifies integration with mixed-supply SoCs and legacy µPs. |
| No external components | Self-contained supervision - requires only 0.1µF VCC bypass capacitor; no timing resistors, capacitors, or pullups needed beyond RESET pullup. |
| VCC = +1.1V reset validity | Guaranteed RESET assertion integrity down to 1.1V - ensures deterministic reset behavior during deep brownout conditions. |
Applications
| Portable Medical Devices | Wearable Health Monitors |
|---|---|
|
Use Scenario: Glucose meter operating from single alkaline or lithium coin cell with variable discharge profile. IC Role / Device Role / Timing Role: Supervises 2.3V rail; asserts RESET during battery voltage sag below 2.313V; holds reset for 150ms to ensure clean µP restart. Use Value: Prevents corrupted EEPROM writes and sensor misreads during low-battery operation - critical for FDA-compliant data integrity. |
Use Scenario: Bluetooth-enabled heart-rate patch with intermittent sensing and sleep-mode cycling. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output; triggers open-drain RESET to wake µC from deep-sleep; leverages ultra-low ICC to minimize quiescent drain. Use Value: Enables >3-month runtime on 30mAh battery by reducing supervision current to <0.2µA - outperforming discrete RC-based solutions by 100×. |
| Industrial Handheld Terminals | Low-Power IoT Sensors |
|
Use Scenario: Ruggedized barcode scanner powered by rechargeable Li-ion with wide temperature range (-40°C to +85°C). IC Role / Device Role / Timing Role: Provides brownout reset at 2.313V; immune to motor-switching transients; guarantees reset validity at cold temperatures. Use Value: Eliminates field failures due to partial resets during battery insertion or vibration-induced contact bounce - validated across full industrial temp range. |
Use Scenario: Wireless soil moisture node deployed in remote agriculture, powered by solar-charged supercapacitor. IC Role / Device Role / Timing Role: Supervises 2.3V energy-harvesting rail; open-drain RESET interfaces directly to ESP32's active-low reset pin without level shifter. Use Value: Reduces BOM count by removing discrete MOSFET level shifter; 150ms timeout aligns with ESP32's minimum reset hold requirement. |
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; 200ms timeout; push-pull active-low RESET; 1.6µA ICC. | Designed for 3.3V systems - unsuitable for 2.3V rails; higher supply current reduces battery life in ultra-low-power use cases. | Select only if supervising 3.3V domain and push-pull output is mandatory; not drop-in for MAX6856UK23D3+T's 2.313V/open-drain requirements. |
| STM6315SW33DX | 3.08V threshold; 200ms timeout; open-drain RESET; 1.2µA ICC; -40°C to +125°C rating. | Higher temperature grade but mismatched threshold - cannot replace 2.313V monitoring without redesigning power rail. | Consider for extended-temp industrial applications requiring 3.08V supervision; not functionally equivalent for 2.3V battery monitoring. |
Compared with TPS3836K33DBVR and STM6315SW33DX, MAX6856UK23D3+T uniquely delivers 2.313V precision threshold, open-drain output, and 170nA ICC - making it irreplaceable for sub-2.5V battery-powered medical and wearable designs where voltage accuracy and nanoamp quiescent current are non-negotiable.
Availability
MAX6856UK23D3+T is available at Aetrix Electronics and suitable for portable medical devices, wearable health monitors, industrial handheld terminals, and low-power IoT sensors requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6856UK23D3+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 ICs for industrial, medical, and communications applications.
The MAX685x family was designed specifically for nanopower microprocessor supervision in battery-constrained portable equipment - prioritizing ultra-low ICC, precise reset thresholds, and robust transient immunity in miniature SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6856UK23D3+T?
The MAX6856UK23D3+T has a factory-trimmed reset threshold voltage of 2.313V, with ±2.5% tolerance over the full -40°C to +85°C temperature range. This value is confirmed in Table 2 (Threshold Suffix Guide) of the datasheet, where suffix "23" corresponds to 2.313V nominal. The device guarantees valid reset assertion down to VCC = +1.1V, supporting reliable operation during deep brownout conditions.
Does MAX6856UK23D3+T include a watchdog timer?
No, MAX6856UK23D3+T does not include a watchdog timer. It belongs to the MAX6854/MAX6855/MAX6856 subgroup, which provides only voltage monitoring and manual reset functionality. Watchdog capability is exclusive to MAX6864–MAX6869 variants (e.g., MAX6864UK23D3S), identifiable by the "S" or "L" suffix in the ordering code. MAX6856UK23D3+T relies solely on VCC monitoring and MR input for reset generation.
What type of RESET output does MAX6856UK23D3+T provide?
MAX6856UK23D3+T provides an active-low open-drain RESET output (Pin 1). This requires an external pullup resistor to the target logic supply (e.g., 1.8V, 3.3V, or 5V) and enables wired-OR reset bus configurations, level shifting, and compatibility with µPs having varied reset input voltage requirements. Unlike push-pull variants (e.g., MAX6854), it does not source current - only sinks current when asserted.
What is the reset timeout period for MAX6856UK23D3+T?
The MAX6856UK23D3+T features a fixed 150ms minimum reset timeout period (D3 option), with typical value 225ms and maximum 300ms across temperature and voltage. This timeout begins after VCC rises above the 2.313V threshold and MR is deasserted, ensuring sufficient hold time for microcontroller initialization. The D3 designation is encoded in the part number suffix "D3".
Is MAX6856UK23D3+T pin-compatible with other MAX685x devices?
Yes, MAX6856UK23D3+T shares the identical 5-pin SOT23-5 pinout with all MAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869 devices - Pin 1 = RESET, Pins 2&4 = GND, Pin 3 = MR, Pin 5 = VCC. However, functional differences exist: MAX6856 offers open-drain RESET, while MAX6854 is push-pull active-low and MAX6855 is push-pull active-high. Swapping requires verifying RESET polarity and output type in the target circuit.
MAX6856UK23D3+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:
- 2.313V
- 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
MAX6856UK23D3+T FAQ
1.How can I place an order for MAX6856UK23D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6856UK23D3+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 MAX6856UK23D3+T reliable?
The price and inventory of MAX6856UK23D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6856UK23D3+T is usually 5 days.
3.What payment methods are accepted for MAX6856UK23D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6856UK23D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6856UK23D3+T?
MAX6856UK23D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6856UK23D3+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 MAX6856UK23D3+T?
For technical support, including MAX6856UK23D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6856UK23D3+T requirements.
6.How does Aetrix verify that MAX6856UK23D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6856UK23D3+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 MAX6856UK23D3+T meets industry standards.
7.What is the process for return or replacement of MAX6856UK23D3+T?
All MAX6856UK23D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6856UK23D3+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 MAX6856UK23D3+T part is unused and in its original packaging.
Return procedure for MAX6856UK23D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6856UK23D3+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
