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Analog Devices Inc./Maxim Integrated MAX6356SYUT+T
- Part No.:
- MAX6356SYUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6356SYUT+T.pdf
- Description:
- IC SUPERVISOR MPU SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,653
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Product details
Overview
The MAX6356SYUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with active-low push-pull reset referenced to VCC1, factory-set VCC1 threshold of 2.93V and VCC2 threshold of 2.19V, 100ms min reset timeout, and integrated RSTIN input for monitoring a third voltage at 1.22V. It operates over –40°C to +85°C in 6-pin SOT23 and supports multivoltage embedded systems requiring reliable power-on and undervoltage reset.
For engineers reviewing the MAX6356SYUT+T datasheet, MAX6356SYUT+T pinout, MAX6356SYUT+T application, or MAX6356SYUT+T equivalent, key selection criteria include its dual-supply monitoring capability, RSTIN-adjustable third-voltage detection, guaranteed RESET validity down to VCC1 = 1.0V or VCC2 = 1.0V, and compatibility with manual reset and system-level watchdog coordination (though MAX6356 lacks WDI).
Technical Context
This device implements a precision dual-threshold comparator architecture with independent VCC1 and VCC2 sensing paths, each with ±0.15V threshold tolerance over temperature and 20ppm/°C tempco. Its RSTIN input provides a dedicated 1.22V reference for external resistive divider-based monitoring of a third supply rail.
The MAX6356SYUT+T uses a push-pull output stage referenced to VCC1, delivering VOL ≤ 0.3V at ISINK = 50µA across full temperature range and VOH ≥ 0.8 × VCC1 for _Y-suffix versions at ISOURCE = 500µA - enabling direct interface with 2.5V/3.3V logic without pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; ensures reliable reset assertion when primary supply drops below nominal 2.93V rail |
| VCC2 Threshold | 2.19V ±0.05V at +25°C; monitors secondary supply such as I/O or analog domain independently |
| RSTIN Threshold | 1.22V ±0.03V; enables precise third-rail monitoring (e.g., 1.8V core via 1.22V divider) without external reference |
| Reset Timeout | 100–280ms; guarantees minimum reset pulse width sufficient for full μP initialization across voltage and temperature |
| Supply Current | 20µA typical; supports battery-backed or low-power always-on supervision without significant load |
| Operating Temp | –40°C to +85°C; fully specified for industrial-grade embedded applications with no derating required |
| RESET Validity | Guaranteed while VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; maintains functional reset state during brownout conditions |
Pinout & Package
MAX6356SYUT+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is RST (active-low push-pull, referenced to VCC1), Pin 2 is GND, Pin 3 is MR (debounced manual-reset input), Pin 4 is VCC2, Pin 5 is RSTIN (third-voltage comparator input), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (RST) | Active-low reset output | Push-pull CMOS driver referenced to VCC1; sinks 50µA at ≤0.3V, sources 500µA at ≥0.8×VCC1 - eliminates need for external pull-up |
| Pin 2 (GND) | Ground reference | Common return for all internal comparators and output stages; must be low-impedance connection to system ground plane |
| Pin 3 (MR) | Manual reset input | Debounced TTL/CMOS-compatible input; asserts reset when pulled low; internally pulled up ~63.5kΩ to VCC1 if left open |
| Pin 4 (VCC2) | Secondary supply input | Monitors second voltage rail; powers internal circuitry when VCC2 > VCC1; valid range 1.2V–5.5V |
| Pin 5 (RSTIN) | Third-voltage monitor input | High-impedance (±25nA) comparator input with 1.22V threshold; accepts external divider for rails >1.22V; powered by VCC1 |
| Pin 6 (VCC1) | Primary supply input | Primary monitoring and power source; powers internal logic when VCC1 > VCC2; defines RST output voltage levels and RSTIN bias |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage thresholds | Factory-trimmed VCC1 = 2.93V and VCC2 = 2.19V enable simultaneous monitoring of core and I/O supplies without calibration |
| Adjustable third-voltage monitoring | RSTIN input with 1.22V internal reference allows precise supervision of auxiliary rails (e.g., 1.8V, 2.5V) using only two external resistors |
| Low-power operation | 20µA supply current permits integration into always-on subsystems without compromising battery life or thermal budget |
| Robust reset timing | 100ms minimum reset pulse width ensures μP and peripheral initialization completes before release |
| Extended supply validity | RESET remains asserted and valid even as VCC1 or VCC2 decays to 1.0V - critical for controlled shutdown sequences |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Supervising dual-rail power domains (3.3V I/O, 2.5V analog) and a 1.8V FPGA core in a compact, battery-assisted controller. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting synchronized reset across all domains upon any rail failure; RSTIN configures 1.8V core monitoring. Use Value: Prevents partial initialization and metastability by guaranteeing coordinated reset release after all supplies stabilize above their thresholds. | Use Scenario: Ensuring safe boot and fault recovery in portable ultrasound devices with isolated sensor bias, digital processing, and display power rails. IC Role / Device Role / Timing Role: Monitoring 2.93V main logic rail, 2.19V analog front-end rail, and 1.22V-referenced 1.8V sensor interface via RSTIN divider. Use Value: Enables deterministic startup sequence and immediate fault halt on single-rail collapse - meeting IEC 62304 safety requirements. |
| Automotive Body Control Modules | Industrial IoT Edge Gateways |
Use Scenario: Managing power sequencing and brownout response in 12V-derived 3.3V/2.2V systems exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Dual-threshold supervision of primary MCU supply (2.93V) and CAN transceiver rail (2.19V); RSTIN tracks 1.22V LDO output for critical sensors. Use Value: Maintains valid RESET down to 1.0V per rail, ensuring fail-safe behavior during automotive cranking events where supplies dip transiently. | Use Scenario: Supervising heterogeneous compute stack (ARM SoC @ 2.93V, memory @ 2.19V, RF module @ 1.8V) in fanless edge gateway with thermal constraints. IC Role / Device Role / Timing Role: Simultaneous monitoring of two fixed rails plus third rail via RSTIN; low 20µA ICC enables 24/7 supervision without fan activation. Use Value: Eliminates need for discrete supervisors or microcontroller-based monitoring - reducing BOM count and firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6355SYUT+T | Open-drain RST output (vs. MAX6356's push-pull); identical VCC1/VCC2 thresholds and RSTIN specs | Requires external pull-up resistor for reset signaling; better suited for wired-OR reset buses or level translation | Select MAX6355SYUT+T when shared reset bus or mixed-voltage logic interfacing is required |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN or dual-threshold capability; 35µA ICC vs. 20µA | Lacks third-voltage monitoring and dual-rail independence; suitable only for single-rail systems | Choose TPS3808G33DBVR only for cost-sensitive, single-rail designs where RSTIN and VCC2 monitoring are unnecessary |
Compared with MAX6355SYUT+T and TPS3808G33DBVR, the MAX6356SYUT+T uniquely delivers push-pull reset drive, dual independent supply monitoring, and configurable third-rail supervision in one 6-pin SOT23 - making it optimal for space-constrained multivoltage systems requiring minimal external components and deterministic reset behavior.
Availability
MAX6356SYUT+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6356SYUT+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 high-performance analog and mixed-signal ICs for industrial, computing, communications, and consumer applications.
The MAX6351–MAX6360 family was engineered to replace discrete reset solutions in multivoltage embedded systems - delivering precision dual/third-rail supervision, low quiescent current, and guaranteed operation across industrial temperature ranges.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6356SYUT+T?
The MAX6356SYUT+T has a factory-set VCC1 threshold of 2.93V (±0.05V at +25°C) and VCC2 threshold of 2.19V (±0.05V at +25°C), as defined by the "SY" suffix in the Voltage Threshold Levels table. These values are trimmed during production and guaranteed over –40°C to +85°C with 20ppm/°C tempco.
Does the MAX6356SYUT+T include a watchdog timer function?
No, the MAX6356SYUT+T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants. The MAX6356SYUT+T provides triple-voltage supervision (VCC1, VCC2, and RSTIN) with manual reset but no WDI input or timeout logic.
How is the third voltage monitored using RSTIN on the MAX6356SYUT+T?
The RSTIN pin on the MAX6356SYUT+T features an internal 1.22V comparator reference. To monitor a third voltage (e.g., 1.8V), connect a resistive divider between that rail and ground, feeding the midpoint to RSTIN. The threshold at the external rail is calculated as VEXT = 1.22V × (R1 + R2)/R2, with RSTIN biased from VCC1 and limited to ≤VCC1.
What is the output type and drive strength of the RST pin on the MAX6356SYUT+T?
The RST pin on the MAX6356SYUT+T is an active-low push-pull CMOS output referenced to VCC1. It sinks ≥50µA at VOL ≤ 0.3V and sources ≥500µA at VOH ≥ 0.8 × VCC1 for the "_Y" suffix variant - eliminating the need for external pull-up resistors in standard 2.5V/3.3V logic interfaces.
Can the MAX6356SYUT+T operate with supply voltages below 2.19V or 2.93V?
Yes - the MAX6356SYUT+T functions across VCC1 and VCC2 ranges of 1.2V to 5.5V. Its reset outputs remain valid as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. The thresholds (2.93V/2.19V) define trip points, not minimum operating voltages; the IC continues supervision and reset assertion during brownout down to 1.0V on either rail.
MAX6356SYUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.19V, 2.93V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6356SYUT+T FAQ
1.How can I place an order for MAX6356SYUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6356SYUT+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 MAX6356SYUT+T reliable?
The price and inventory of MAX6356SYUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6356SYUT+T is usually 5 days.
3.What payment methods are accepted for MAX6356SYUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6356SYUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6356SYUT+T?
MAX6356SYUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6356SYUT+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 MAX6356SYUT+T?
For technical support, including MAX6356SYUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6356SYUT+T requirements.
6.How does Aetrix verify that MAX6356SYUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6356SYUT+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 MAX6356SYUT+T meets industry standards.
7.What is the process for return or replacement of MAX6356SYUT+T?
All MAX6356SYUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6356SYUT+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 MAX6356SYUT+T part is unused and in its original packaging.
Return procedure for MAX6356SYUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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