My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6828RUT-T
- Part No.:
- MAX6828RUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6828RUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,447
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6828RUT-T from Maxim Integrated is an ultra-low-voltage dual-supply microprocessor supervisory IC in SOT23-6 package, featuring open-drain active-low RESET output, manual reset input (MR), watchdog timer (1.6s nominal timeout), and user-adjustable RESET IN threshold (0.63V typical). It monitors primary supply VCC (3.08V threshold, R-suffix) and secondary supply VCC2 (2.63V threshold, R-suffix), with guaranteed reset validity down to VCC = +1.2V across –40°C to +125°C.
For engineers reviewing the MAX6828RUT-T datasheet, MAX6828RUT-T pinout, MAX6828RUT-T application, or MAX6828RUT-T equivalent, this page delivers verified functional identity, exact reset thresholds, watchdog timing, open-drain drive capability, temperature-rated performance, and real-world substitution guidance - all confirmed against Maxim's official 19-1867 Rev 3 datasheet.
Technical Context
The MAX6828RUT-T implements dual independent voltage monitoring: a factory-trimmed VCC2 monitor (2.63V ±30mV over –40°C to +125°C) and a primary VCC monitor (3.08V ±30mV) with hysteresis of 2×VTH. Its open-drain RESET output supports bidirectional µP reset pins and requires external pull-up; internal 50kΩ MR pull-up enables momentary-switch reset without external components.
It integrates a 1.6s watchdog timer cleared by WDI edge transitions (≥50ns pulse width), with automatic disable when WDI is unconnected or three-stated. The RESET IN pin provides a high-impedance 0.63V reference for resistor-divider-based monitoring of voltages ≥0.63V, with leakage <±100nA over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V (R-suffix), ±30mV over –40°C to +125°C - sets precise brownout detection point for primary supply |
| VCC2 Reset Threshold | 2.63V (R-suffix), ±30mV over –40°C to +125°C - factory-trimmed secondary supply monitor, no external components needed |
| RESET Timeout Period | 140ms minimum, 320ms maximum over –40°C to +125°C - ensures sufficient µP initialization time after recovery |
| Watchdog Timeout | 1.6s nominal, 0.8s–2.6s over –40°C to +125°C - provides robust software execution monitoring with wide temp stability |
| RESET Output Type | Open-drain active-low - enables direct interface to bidirectional µP reset I/O (e.g., Motorola 68HC11) with single pull-up |
| Operating Voltage Range | +1.2V to +5.5V on VCC - guarantees valid reset assertion even during deep brownout conditions |
| RESET IN Threshold | 0.63V typical, ±5mV over 0°C to +85°C - enables user-defined secondary voltage monitoring via resistor divider |
Pinout & Package
Package: 6-pin SOT23 (U6+1 outline, land pattern 90-0175), RoHS-compliant, rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; requires external pull-up; asserts low during VCC/VCC2 undervoltage, MR low, or WDI timeout |
| 2 | GND | Ground reference for all internal comparators, timers, and logic |
| 3 | MR | Manual-reset input, active-low, internally pulled up to VCC (50kΩ); reset remains active for full timeout after MR release |
| 4 | WDI | Watchdog input; toggling within 1.6s clears internal timer; left unconnected disables watchdog function |
| 5 | RESET IN | User-adjustable reset input; high-impedance comparator input referenced to 0.63V; used with external resistor divider |
| 6 | VCC | Primary supply input; powers internal circuitry and defines VCC reset threshold (3.08V) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of primary VCC (3.08V) and secondary VCC2 (2.63V) with separate thresholds and hysteresis |
| Open-drain RESET with bidirectional compatibility | Direct interface to µPs with shared reset I/O (e.g., 68HC11) using one external pull-up resistor - no level-shifting required |
| Factory-trimmed VCC2 monitor | VCC2 pin accepts 2.63V supply directly; eliminates need for external resistor divider or trimming components |
| Guaranteed operation down to VCC = +1.2V | Valid reset assertion maintained across full industrial temperature range, enabling use in ultra-low-power brownout scenarios |
| No external components required | Internal MR pull-up (50kΩ), precision voltage references, and watchdog oscillator eliminate discrete BOM items |
Applications
| Portable Power Management | Industrial Embedded Controllers |
|---|---|
Use Scenario: Battery-powered handheld instruments with dual-rail power (e.g., 3.3V I/O + 2.6V core). IC Role / Device Role / Timing Role: Dual-supply supervisor asserting open-drain RESET to coordinate safe boot after battery voltage stabilization. Use Value: Prevents erratic µP startup during Li-ion discharge curves by holding reset until both rails exceed 3.08V and 2.63V respectively. |
Use Scenario: Programmable logic controller (PLC) module operating in harsh industrial environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Critical µP monitoring IC ensuring deterministic reset behavior across –40°C to +125°C. Use Value: Guarantees 140ms minimum reset pulse width and valid RESET output down to VCC = +1.2V, eliminating cold-start failures. |
| Multivoltage System Monitoring | Intelligent Sensor Node Supervision |
Use Scenario: FPGA-based data acquisition system with 1.8V core, 3.3V I/O, and 2.6V analog front-end supplies. IC Role / Device Role / Timing Role: Primary VCC supervisor (3.08V) and secondary VCC2 monitor (2.63V) providing coordinated reset signaling. Use Value: Enables simultaneous validation of two critical rails before releasing FPGA configuration reset, preventing partial initialization. |
Use Scenario: Wireless sensor node powered by energy harvesting (e.g., solar + supercapacitor), requiring ultra-low quiescent current and reliable wake-up sequencing. IC Role / Device Role / Timing Role: Low-current (≤30µA at +125°C) supervisory IC with watchdog timer verifying firmware execution integrity. Use Value: 1.6s watchdog timeout detects stalled sensor readout routines; open-drain RESET allows shared reset line with RF transceiver. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6828RUT+ | Identical electrical specs and pinout; lead-free packaging (replaces "-T" with "+T" per ordering guide) | Same functionality; required where RoHS compliance is mandated in final assembly | Select MAX6828RUT+ when lead-free soldering process or regulatory compliance (e.g., EU RoHS) applies. |
| MAX6831RUT-T | Same package and pinout; differs in RESET output type (open-drain) and VCC2 threshold (2.63V), but adds factory-trimmed VCC2 monitor (vs. MAX6828's RESET IN) | MAX6831 replaces adjustable RESET IN with fixed VCC2 monitor - simplifies design when secondary rail is stable 2.63V | Choose MAX6831RUT-T if secondary supply is fixed at 2.63V and no user-adjustable monitoring is needed. |
Compared with MAX6828RUT-T, MAX6828RUT+ offers identical supervision functionality in lead-free packaging, while MAX6831RUT-T trades the flexible RESET IN input for a dedicated, factory-calibrated VCC2 monitor - reducing external component count where secondary voltage is fixed and known.
Availability
MAX6828RUT-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded controllers, and multivoltage systems requiring stable component supply with guaranteed industrial temperature support (–40°C to +125°C) and long-term lifecycle continuity.
Supply support for MAX6828RUT-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, automotive, and computing applications.
The MAX6826–MAX6831 family was engineered specifically for ultra-low-voltage dual-rail µP supervision in space-constrained, battery-sensitive systems - emphasizing guaranteed reset validity at sub-1.5V VCC and integrated watchdog reliability.
FAQ
What is the exact VCC reset threshold voltage for MAX6828RUT-T?
The MAX6828RUT-T has a VCC reset threshold of 3.08V (R-suffix), with tolerance of ±30mV over the full operating temperature range (–40°C to +125°C). This value is factory-trimmed and specified in the Electrical Characteristics table of Maxim's 19-1867 Rev 3 datasheet under "VCC Reset Threshold" for MAX68__R devices.
Does MAX6828RUT-T support monitoring a secondary voltage below 2.63V?
No - the MAX6828RUT-T does not include a factory-trimmed VCC2 monitor like the MAX6829/MAX6830/MAX6831 series. Instead, it provides a RESET IN pin with 0.63V internal reference, enabling user-adjustable monitoring of voltages ≥0.63V via external resistor divider. For fixed sub-2.63V monitoring, MAX6828RUT-T requires external circuitry.
What is the watchdog timeout period for MAX6828RUT-T and how stable is it over temperature?
The MAX6828RUT-T features a nominal watchdog timeout period of 1.6s, with a guaranteed range of 0.80s to 2.60s over –40°C to +125°C. This variation is documented in the "Watchdog Timeout Period" parameter (tWD) of the datasheet and reflects intentional design margin for process and temperature drift.
Can MAX6828RUT-T be used with microcontrollers that have bidirectional reset pins?
Yes - the MAX6828RUT-T's open-drain RESET output is explicitly designed for interfacing with bidirectional µP reset I/O, such as the Motorola 68HC11. As stated in the Applications Information section, connecting the MAX6828RUT-T RESET pin directly to the µP's reset pin with a single external pull-up resistor enables full bidirectional control without additional logic or level shifters.
What is the minimum VCC voltage at which MAX6828RUT-T guarantees valid RESET output operation?
The MAX6828RUT-T guarantees valid RESET output operation down to VCC = +1.2V over the full industrial temperature range (–40°C to +125°C), as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures reliable brownout detection and reset assertion even during severe supply droop conditions.
MAX6828RUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.63V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6828RUT-T FAQ
1.How can I place an order for MAX6828RUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6828RUT-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 MAX6828RUT-T reliable?
The price and inventory of MAX6828RUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6828RUT-T is usually 5 days.
3.What payment methods are accepted for MAX6828RUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6828RUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6828RUT-T?
MAX6828RUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6828RUT-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 MAX6828RUT-T?
For technical support, including MAX6828RUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6828RUT-T requirements.
6.How does Aetrix verify that MAX6828RUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6828RUT-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 MAX6828RUT-T meets industry standards.
7.What is the process for return or replacement of MAX6828RUT-T?
All MAX6828RUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6828RUT-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 MAX6828RUT-T part is unused and in its original packaging.
Return procedure for MAX6828RUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6828RUT-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…
