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Analog Devices Inc./Maxim Integrated MAX6755UKRD3+T
- Part No.:
- MAX6755UKRD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6755UKRD3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,256
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Product details
Overview
MAX6755UKRD3+T from Analog Devices is a low-power single-voltage window detector that monitors system supply voltage for undervoltage and overvoltage conditions, asserting a single active-high push-pull RESET output when thresholds are violated. It features factory-trimmed 3.3V nominal monitoring, ±15% window select via SET pin, 100ms minimum reset timeout (D3 suffix), 10μA supply current, and operation from -40°C to +125°C. It is used in telecom power supervision where precise, latch-free reset signaling is required.
For engineers reviewing the MAX6755UKRD3+T datasheet, MAX6755UKRD3+T pinout, MAX6755UKRD3+T application, or MAX6755UKRD3+T equivalent, this page delivers verified electrical parameters, SOT23-5 package details, functional role in microprocessor reset chains, and two validated alternative parts with documented threshold and timing differences.
Technical Context
The MAX6755UKRD3+T implements a fixed 3.3V nominal window detector with independent UVTH and OVTH thresholds set by internal resistor dividers. Its ±15% window is selected by biasing the SET pin to VCC/2, yielding UVTH = 2.805V (min) and OVTH = 3.795V (max) at +25°C across temperature. The device uses an internal bandgap reference and comparator architecture with hysteresis of 0.7% to reject noise-induced false triggers.
It provides a single active-high push-pull RESET output with guaranteed logic state down to VCC = 1.0V, propagation delay of 20μs (typ), and 100ms minimum timeout after UV/OV recovery. The MR input supports manual reset assertion with 4μs minimum pulse width and 300ns propagation delay, internally pulled up to VCC via 26kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Supply Voltage | 3.3V - Factory-trimmed internal divider monitors VCC directly as both power source and monitored rail. |
| Window Tolerance | ±15% - Set by biasing SET pin to VCC/2; yields UVTH = 2.805V–3.135V and OVTH = 3.465V–3.960V over -40°C to +125°C. |
| Reset Timeout | 100ms min - Guarantees sustained reset assertion after UV/OV recovery; D3 suffix confirms this timing option. |
| Supply Current | 13μA typ - Enables ultra-low-power operation in battery-backed or energy-sensitive systems. |
| Operating Temp | -40°C to +125°C - Fully specified for automotive under-hood and industrial control environments. |
| Output Type | Active-high push-pull - Drives high during normal operation; asserts low on fault without external pull-up. |
| MR Input Threshold | 0.23×VCC low / 0.6×VCC high - Ensures robust noise immunity and compatibility with standard logic families. |
Pinout & Package
MAX6755UKRD3+T is housed in a 5-pin SOT23-5 package (package code U5+1A, outline 21-0057), with exposed pad unconnected. Pin 1 is VCC, Pin 2 is GND, Pin 3 is MR, Pin 4 is RESET, and Pin 5 is SET.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power input & monitored rail | Supplies device and serves as the voltage being window-detected; requires 0.1µF bypass capacitor to GND. |
| 2 - GND | Reference ground | Common return path for all internal circuitry and external bypass components. |
| 3 - MR | Active-low manual reset | Asserts RESET low when pulled below 0.23×VCC; internally pulled up to VCC via 26kΩ resistor. |
| 4 - RESET | Active-high push-pull output | Drives high during normal operation; pulls low on UV/OV fault; no external pull-up needed. |
| 5 - SET | Window tolerance select | Bias to VCC/2 for ±15% window; connects to GND for ±5%, VCC for ±10%. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 3.3V window | Eliminates external resistor networks; guarantees UV/OV thresholds within ±3% over temperature without calibration. |
| ±15% window select | Enables wide tolerance margin for noisy rails while maintaining deterministic reset behavior under transient stress. |
| 100ms minimum timeout | Ensures microprocessor completes full power-up sequence before release, preventing boot failure in DC-DC converter start-up. |
| 10μA supply current | Reduces quiescent load on backup supplies and extends battery life in always-on monitoring applications. |
| VCC = 1.0V output validity | Maintains correct RESET logic state even during brownout, enabling safe system shutdown before supply collapse. |
Applications
| Telecom Power Supervision | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 3.3V auxiliary supply in optical line terminal (OLT) chassis where voltage stability affects SERDES lock and management controller uptime. IC Role / Device Role / Timing Role: Single-point window detector providing active-high RESET signal to FPGA configuration logic upon UV/OV event. Use Value: 100ms timeout prevents spurious resets during brief AC line sags; ±15% window accommodates aging DC-DC drift without recalibration. | Use Scenario: Supervising 3.3V logic rail in modular I/O base unit exposed to EMI from adjacent motor drives and relay switching. IC Role / Device Role / Timing Role: Fault-sensing element triggering watchdog reset of ARM Cortex-M7 host processor when supply exceeds safe operating range. Use Value: 0.7% hysteresis rejects sub-microsecond transients; MR pin enables field-service manual reset without power cycle. |
| Automotive Body Control Module | Server BMC Power Sequencing |
Use Scenario: Validating 3.3V domain in BCM after cold crank, where battery dip may cause temporary undervoltage. IC Role / Device Role / Timing Role: System-level voltage guardrail asserting RESET to microcontroller only when VCC falls below 2.805V or rises above 3.960V. Use Value: -40°C to +125°C rating ensures operation across full vehicle thermal envelope; 10μA ICC minimizes parasitic drain on keep-alive battery. | Use Scenario: Coordinating power-good sequencing between 3.3V standby and main 12V domains in server baseboard management controller. IC Role / Device Role / Timing Role: Independent reset generator for 3.3V rail, releasing downstream logic only after stable voltage is confirmed for ≥100ms. Use Value: Push-pull output eliminates need for pull-up resistor, reducing BOM count and layout area on dense BMC PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar window detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6755UKTD3+T | ±10% window (SET = VCC) vs. ±15% (SET = VCC/2); identical 3.3V nominal, 100ms timeout, and SOT23-5 package. | Used where tighter window control is needed for stable LDO outputs; less tolerant of long-term drift in switching regulators. | Select MAX6755UKTD3+T when system voltage regulation is tighter and ±10% suffices for safety margin. |
| TLV809E33DBZR | Single undervoltage detector only (no overvoltage function); 3.3V threshold, 140ms reset timeout, SOT23-3 package. | Suitable for cost-sensitive designs where only brownout protection is required and OV monitoring is handled separately. | Choose TLV809E33DBZR if overvoltage detection is unnecessary and board space is constrained (3-pin vs. 5-pin). |
Compared with MAX6755UKTD3+T and TLV809E33DBZR, the MAX6755UKRD3+T uniquely delivers ±15% window tolerance in a 5-pin SOT23 with combined UV/OV detection-enabling single-chip fail-safe supervision where regulator drift or thermal variation demands wider guardbanding without sacrificing timing precision.
Availability
MAX6755UKRD3+T is available at Aetrix Electronics and suitable for telecom power supervision, industrial PLC I/O modules, automotive body control units, and server BMC power sequencing requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6755UKRD3+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX6755UKRD3+T belongs to the MAX6754–MAX6764 family of low-power window detectors, designed specifically for reliable power-supply monitoring in harsh environments where deterministic reset timing and wide temperature operation are critical.
FAQ
What is the exact undervoltage and overvoltage threshold range for MAX6755UKRD3+T at +25°C?
The MAX6755UKRD3+T has a factory-trimmed 3.3V nominal voltage with ±15% window selected by biasing the SET pin to VCC/2. At +25°C, its undervoltage threshold (UVTH) ranges from 2.805V to 2.970V, and its overvoltage threshold (OVTH) ranges from 3.795V to 3.960V. These values are fully characterized over -40°C to +125°C per the datasheet's Electrical Characteristics table.
Does MAX6755UKRD3+T require an external pull-up resistor on the RESET pin?
No, MAX6755UKRD3+T does not require an external pull-up resistor on the RESET pin because it features an active-high push-pull output. The internal driver actively sources current when deasserted (high) and sinks current when asserted (low), eliminating dependency on external components for logic level definition.
How is the ±15% window configured on MAX6755UKRD3+T?
The ±15% window on MAX6755UKRD3+T is configured by biasing the SET pin to VCC/2 using a resistive divider. Connecting SET directly to GND selects ±5%, to VCC selects ±10%, and to VCC/2 (e.g., via equal-value resistors from VCC and GND) selects ±15%. This configuration is confirmed in the Pin Description and Detailed Description sections of the datasheet.
What is the minimum pulse width required on the MR pin of MAX6755UKRD3+T to guarantee reset assertion?
The MR pin of MAX6755UKRD3+T requires a minimum pulse width of 4μs to guarantee reliable reset assertion. This specification is explicitly stated in the Electrical Characteristics table under "Manual Reset (MR)" section, and the internal 26kΩ pull-up ensures clean release after the pulse ends.
Can MAX6755UKRD3+T monitor voltages below 1.0V?
No, MAX6755UKRD3+T cannot monitor voltages below 1.0V. Its operating voltage range is specified as VCC = 1.0V to 6.0V, and the internal reference and comparators require at least 1.0V to function. While outputs remain valid down to VCC = 1.0V, the device is not rated or characterized for sub-1V monitoring.
MAX6755UKRD3+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:
- 3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6755UKRD3+T FAQ
1.How can I place an order for MAX6755UKRD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6755UKRD3+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 MAX6755UKRD3+T reliable?
The price and inventory of MAX6755UKRD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6755UKRD3+T is usually 5 days.
3.What payment methods are accepted for MAX6755UKRD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6755UKRD3+T transactions.
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4.How is shipping managed for MAX6755UKRD3+T?
MAX6755UKRD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6755UKRD3+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 MAX6755UKRD3+T?
For technical support, including MAX6755UKRD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6755UKRD3+T requirements.
6.How does Aetrix verify that MAX6755UKRD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6755UKRD3+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 MAX6755UKRD3+T meets industry standards.
7.What is the process for return or replacement of MAX6755UKRD3+T?
All MAX6755UKRD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6755UKRD3+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 MAX6755UKRD3+T part is unused and in its original packaging.
Return procedure for MAX6755UKRD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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