My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6858UK19D3+T
- Part No.:
- MAX6858UK19D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6858UK19D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,977
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6858UK19D3+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 1.9V reset threshold (±2.5%), and 150ms minimum reset timeout period. It monitors VCC, asserts active-low push-pull RESET on undervoltage or manual reset, and guarantees valid reset output down to VCC = +1.1V - ideal for battery-powered glucose monitors and portable medical devices.
For engineers reviewing the MAX6858UK19D3+T datasheet, MAX6858UK19D3+T pinout, MAX6858UK19D3+T application, or MAX6858UK19D3+T equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, and validated alternative options for low-power embedded system design.
Technical Context
The MAX6858UK19D3+T implements a precision voltage monitor with hysteresis (0.5% of VTH), internal 10kΩ MR pullup, and glitch-immune reset assertion logic. Its reset timeout is fixed at 150ms (D3 option), and it lacks watchdog timer (WDI) and CT select inputs - distinguishing it from MAX6864–MAX6869 and MAX6861–MAX6863 variants.
This device uses BiCMOS process technology (2848 transistors) and operates across -40°C to +85°C. It requires no external components, supports VCC from 1.2V to 5.5V, and maintains guaranteed RESET validity even as VCC drops to 1.1V - critical for brownout resilience in single-cell Li-ion or alkaline systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typical at +25°C - enables multi-year battery life in always-on medical sensors |
| Reset Threshold Voltage | 1.900V ±2.5% - factory-trimmed for precise 1.8V rail monitoring with 47.5mV hysteresis |
| Reset Timeout Period | 150ms minimum (D3 option) - ensures µP initialization completes before release from reset |
| VCC Operating Range | 1.2V to 5.5V - supports single-cell Li-ion (2.7–4.2V), NiMH (0.9–1.4V/cell), and 3.3V/5V logic rails |
| RESET Output Type | Active-low push-pull - drives directly into µP reset pin without external pullup; sinks 50µA at VCC ≥1.1V |
| MR Input Behavior | Active-low with 10kΩ internal pullup - accepts CMOS logic or momentary switch; 1µs min pulse width |
| Reset Validity Limit | Guaranteed to VCC = +1.1V - prevents spurious release during deep brownout recovery |
Pinout & Package
Package: 5-pin SOT23-5 (1.6mm × 2.9mm × 1.1mm), lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | I.C. (Internally Connected) | No external connection required; tie to GND for enhanced noise immunity per datasheet recommendation |
| 3 | GND | Ground reference for all internal circuitry; must be low-impedance connection to system ground plane |
| 4 | RESET | Active-low push-pull output; asserts low during VCC undervoltage or MR activation; deasserts after 150ms timeout |
| 5 | VCC | Supply input and monitored rail; bypass with 0.1µF ceramic capacitor to GND for transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical enables >10-year battery life in coin-cell-powered patient monitors |
| Factory-trimmed VTH | 1.900V ±2.5% eliminates need for external resistor divider or calibration in production |
| No external components | Self-contained supervision - reduces BOM count, PCB area, and qualification effort |
| Immunity to short VCC transients | Rejects ≤40µs glitches at 100mV overdrive - prevents false resets in noisy power environments |
| Valid RESET to 1.1V | Ensures deterministic reset hold until VCC stabilizes above µP's operational floor |
Applications
| Glucose Monitoring Systems | Patient Vital Sign Loggers |
|---|---|
|
Use Scenario: Continuous glucose meter with Bluetooth LE transmission powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Monitors 3.0V regulated rail; asserts RESET during cold-start or battery sag to prevent firmware corruption. Use Value: 170nA ICC extends battery life beyond 2 years; 150ms timeout accommodates slow LDO startup and ADC initialization. |
Use Scenario: Portable ECG patch recording heart rate, SpO₂, and temperature every 5 seconds. IC Role / Device Role / Timing Role: Supervises 1.8V MCU core rail; holds reset during intermittent battery voltage dip caused by RF transmission bursts. Use Value: Guaranteed RESET validity to 1.1V prevents premature release when battery drops to 2.0V under load - avoiding boot-loop failure. |
| Wireless Sensor Nodes | Industrial Handheld Scanners |
|
Use Scenario: LoRaWAN soil moisture sensor deployed in remote fields with primary AA alkaline cells. IC Role / Device Role / Timing Role: Detects VCC decay below 1.9V threshold during end-of-life battery discharge; triggers graceful shutdown sequence. Use Value: Factory-trimmed 1.9V threshold aligns precisely with alkaline cell's 1.0V/cell cutoff, enabling accurate remaining-life estimation. |
Use Scenario: Rugged barcode scanner using ARM Cortex-M0+ MCU and laser driver, powered by rechargeable Li-Po pack. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection during hot-swap battery insertion or motor-induced supply droop. Use Value: Push-pull RESET eliminates need for external pullup, reducing component count and improving ESD robustness on reset line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K33DBVR | 3.3V fixed threshold; 200ms timeout; 1.2µA ICC; SOT23-5 | Higher supply current limits use in multi-year battery applications; fixed 3.3V threshold unsuitable for sub-3V rails | Select only if system uses stable 3.3V rail and >1µA ICC is acceptable |
| MAX6369KA21D3+T | 1.9V threshold; 140ms timeout; 800nA ICC; same SOT23-5 footprint | Higher ICC reduces battery life by ~4.7× vs. MAX6858UK19D3+T; identical pinout and function | Choose when legacy MAX6369 design reuse is prioritized over nanopower optimization |
Compared with TPS3836K33DBVR and MAX6369KA21D3+T, the MAX6858UK19D3+T delivers the lowest ICC (170nA), tightest VTH tolerance (±2.5%), and optimal 150ms timeout for medical-grade power sequencing - making it the preferred choice for long-life, low-voltage, high-reliability applications.
Availability
MAX6858UK19D3+T is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign loggers, wireless sensor nodes, and industrial handheld scanners requiring stable component supply with full traceability and lifecycle support.
Supply support for MAX6858UK19D3+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 communications applications.
The MAX6854–MAX6869 family was engineered specifically for ultra-low-power microprocessor supervision in battery-critical systems - emphasizing nanopower operation, factory-trimmed accuracy, and robust reset timing without external components.
FAQ
What is the exact reset threshold voltage of the MAX6858UK19D3+T?
The MAX6858UK19D3+T has a factory-trimmed reset threshold of 1.900V 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 "19" corresponds to 1.900V nominal. The hysteresis is 0.5% of VTH, ensuring clean release without chatter during voltage recovery.
Does the MAX6858UK19D3+T include a watchdog timer function?
No, the MAX6858UK19D3+T does not include a watchdog timer. Per the Selector Guide and Pin Configurations, MAX6858 belongs to the non-watchdog subgroup (alongside MAX6854/MAX6855/MAX6856/MAX6860) and lacks WDI pin functionality. Watchdog capability is exclusive to MAX6864–MAX6869 variants.
What is the reset timeout period for the MAX6858UK19D3+T, and is it adjustable?
The MAX6858UK19D3+T has a fixed 150ms minimum reset timeout period (D3 option), as indicated by the "D3" in its part number. It is not adjustable - unlike MAX6861–MAX6863, which feature a CT pin for selecting between 10ms and 150ms. This fixed timing is optimized for reliable µP initialization in low-power systems.
Can the MAX6858UK19D3+T operate with supply voltages below 1.8V?
Yes, the MAX6858UK19D3+T operates down to VCC = 1.2V and guarantees valid RESET output down to VCC = 1.1V. Its 1.9V threshold remains functional even at 1.2V supply, enabling use with single-cell NiMH (1.2V nominal) or deeply discharged Li-ion cells - critical for end-of-life detection in portable medical devices.
What is the function of pins 1 and 2 on the MAX6858UK19D3+T?
Pins 1 and 2 of the MAX6858UK19D3+T are labeled "I.C." (Internally Connected) in the datasheet. They are not signal pins and must not be left floating. Maxim recommends connecting both to GND to improve noise immunity - a requirement explicitly stated in the MAX6858/MAX6860 Pin Description section and Functional Diagram.
MAX6858UK19D3+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:
- Obsolete
- 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:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6858UK19D3+T FAQ
1.How can I place an order for MAX6858UK19D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6858UK19D3+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 MAX6858UK19D3+T reliable?
The price and inventory of MAX6858UK19D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6858UK19D3+T is usually 5 days.
3.What payment methods are accepted for MAX6858UK19D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6858UK19D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6858UK19D3+T?
MAX6858UK19D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6858UK19D3+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 MAX6858UK19D3+T?
For technical support, including MAX6858UK19D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6858UK19D3+T requirements.
6.How does Aetrix verify that MAX6858UK19D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6858UK19D3+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 MAX6858UK19D3+T meets industry standards.
7.What is the process for return or replacement of MAX6858UK19D3+T?
All MAX6858UK19D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6858UK19D3+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 MAX6858UK19D3+T part is unused and in its original packaging.
Return procedure for MAX6858UK19D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6858UK19D3+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…
