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Analog Devices Inc./Maxim Integrated MAX6337US23D3+T
- Part No.:
- MAX6337US23D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6337US23D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:8,021
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Product details
Overview
MAX6337US23D3+T from Maxim Integrated is an ultra-low-voltage, open-drain microprocessor supervisory circuit designed to monitor 2.3V power supplies in space-constrained embedded systems. It asserts an active-low RESET signal when VCC falls below 2.30V (±3% over temperature) or when the debounced manual-reset input (MR) is asserted, with a guaranteed minimum 100ms reset timeout and valid operation down to VCC = 1.0V. Used in portable equipment and automotive controllers for reliable brownout detection.
For engineers reviewing the MAX6337US23D3+T datasheet, MAX6337US23D3+T pinout, MAX6337US23D3+T application, or MAX6337US23D3+T equivalent, key selection criteria include its 2.3V factory-trimmed reset threshold, 100ms minimum reset timeout, open-drain output architecture, SOT143-4 package compatibility, and guaranteed functional validity at VCC ≥ 1.0V.
Technical Context
The MAX6337US23D3+T implements a precision voltage comparator with factory-trimmed 2.30V reset threshold (±1.8% at +25°C, ±3% over -40°C to +125°C), immune to fast VCC transients via built-in glitch rejection. Its open-drain RESET output requires an external pull-up resistor and interfaces directly with bidirectional µP reset pins such as those on Motorola 68HC11 derivatives.
It features a debounced manual-reset input with internal 20kΩ pull-up, eliminating external RC networks, and guarantees correct reset state assertion and deassertion timing across full industrial temperature range (-40°C to +125°C) without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V ±3% over -40°C to +125°C - ensures accurate brownout detection for 2.3V nominal rails |
| Reset Timeout Period | 100ms minimum - provides sufficient hold time for safe µP initialization after power recovery |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout while maintaining valid RESET state |
| Supply Current | 3.3µA typical at 2.5V - enables multi-year battery life in portable applications |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and direct interface to bidirectional µP reset pins |
| Manual Reset Input | Debounced with 20kΩ internal pull-up - eliminates need for external debounce circuitry |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6337US23D3+T is housed in a 4-pin SOT143 package (3.0mm × 1.6mm × 1.1mm), optimized for high-density PCB layouts and reflow-compatible lead-free assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Common return path for all internal circuitry; must be low-impedance connection to system ground plane |
| 2 - RESET | Active-low open-drain output | Drives low during reset assertion; requires external pull-up resistor to define logic-high level and enable wired-OR topology |
| 3 - MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC (20kΩ); no external components needed for basic functionality |
| 4 - VCC | Power supply input | Monitored supply rail; device operates correctly from 1.0V to 5.5V and maintains valid RESET state down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.30V threshold | Eliminates calibration overhead and ensures consistent trip point across production lots without external resistors |
| 100ms minimum reset timeout | Guarantees µP core and peripherals fully stabilize before release from reset, preventing erratic boot behavior |
| Open-drain RESET output | Enables shared reset bus with multiple supervisors or µPs, supporting flexible system-level reset coordination |
| Debounced MR with internal pull-up | Reduces BOM count by removing external RC network; supports momentary switch-to-ground implementation |
| VCC transient immunity | Rejects sub-20µs negative glitches up to 100mV overdrive - prevents spurious resets during noisy power events |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Battery-powered glucose monitors and pulse oximeters operating from single-cell Li-ion (2.7–4.2V) with tight power budgets. IC Role / Device Role / Timing Role: Monitors regulated 2.3V supply to MCU and analog front-end; asserts reset during battery sag below safe operating voltage. Use Value: Ensures deterministic startup and shutdown sequencing without external supervision circuitry, extending usable battery life by minimizing quiescent current (3.3µA). |
Use Scenario: Under-dash lighting and door module ECUs exposed to wide temperature swings and load-dump transients. IC Role / Device Role / Timing Role: Supervises 2.3V LDO output powering CAN transceiver and microcontroller; holds reset during cold-crank voltage dips. Use Value: Guarantees valid reset assertion down to VCC = 1.0V and rejects ≤20µs transients-critical for robustness in ISO 16750-2 compliant designs. |
| Industrial PLC I/O Subsystems | Smart Energy Meters |
|
Use Scenario: DIN-rail mounted remote I/O modules powered from 3.3V isolated DC-DC converters with variable input conditions. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for ARM Cortex-M4 controller; interfaces via open-drain RESET to shared system reset bus. Use Value: Enables wired-OR reset arbitration with other subsystems using single pull-up resistor-reducing interconnect complexity and board area. |
Use Scenario: ANSI C12.20-compliant electricity meters with tamper-detection logic and real-time clock backup. IC Role / Device Role / Timing Role: Monitors 2.3V RTC and metering ASIC supply; asserts reset during AC line interruption or capacitor discharge decay. Use Value: Delivers 100ms minimum timeout to ensure secure state save and cryptographic key retention before power loss completes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6336US23D3+T | Push/pull active-low RESET output; guaranteed valid down to VCC = 0.7V | Requires no external pull-up; suitable where shared reset bus is not needed and lower VCC operation is critical | Select when driving CMOS inputs directly without pull-up and operating near 0.7V minimum supply |
| MAX811TEUS23+T | Same 2.3V threshold and SOT143 package; 140ms min timeout; push/pull output; VCC min = 1.0V | Higher timeout and different output structure limit drop-in replacement in open-drain or precise 100ms timing scenarios | Choose for legacy compatibility with MAX811 footprint and where longer reset hold time is acceptable |
Compared with MAX6337US23D3+T, the MAX6336US23D3+T offers lower minimum operating voltage but lacks wired-OR capability, while the MAX811TEUS23+T provides longer timeout and push/pull drive but cannot replace the open-drain function without circuit modification.
Availability
MAX6337US23D3+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O subsystems, and smart energy meters requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6337US23D3+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, automotive, communications, and computing markets.
The MAX6335/MAX6336/MAX6337 family delivers ultra-low-voltage, low-power µP supervisory circuits targeting space-constrained, battery-sensitive, and high-reliability applications where precision reset thresholds and minimal external components are essential.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6337US23D3+T?
The MAX6337US23D3+T has a factory-trimmed reset threshold of 2.30V, with ±1.8% tolerance at +25°C and ±3% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during production and specified in Table 1 of the datasheet; it applies exclusively to the "US23" suffix variant and is confirmed in the Selector Guide and Electrical Characteristics table.
Does MAX6337US23D3+T support operation below 1.8V supply voltage?
Yes, MAX6337US23D3+T is guaranteed to operate and maintain valid RESET assertion/deassertion down to VCC = 1.0V, making it suitable for deep brownout monitoring in low-voltage systems. Unlike the MAX6335/MAX6336 variants (guaranteed to 0.7V), the MAX6337's open-drain architecture is validated specifically for 1.0V minimum VCC, as stated in the General Description and Absolute Maximum Ratings sections.
What is the minimum reset timeout period for MAX6337US23D3+T?
The MAX6337US23D3+T provides a minimum reset timeout period of 100ms, corresponding to the "D3" suffix in its part number. This value is factory-programmed and verified across temperature; typical values range from 100ms to 200ms, with 150ms typical at +25°C, as shown in the Electrical Characteristics table under parameter tRP.
How does the manual reset (MR) input work on MAX6337US23D3+T?
The MR input on MAX6337US23D3+T is debounced internally and features a 20kΩ internal pull-up resistor to VCC. Asserting MR low triggers reset immediately, and RESET remains active for the full 100ms timeout after MR returns high. No external components are required-simply connect a normally open switch between MR and GND for manual reset functionality, as confirmed in the Applications Information section.
Is MAX6337US23D3+T pin-compatible with other supervisory ICs?
Yes, MAX6337US23D3+T is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 families in the SOT143-4 package, sharing identical pinout (VCC, RESET, MR, GND). However, output structure differs: MAX6337US23D3+T uses open-drain RESET, whereas MAX811-series devices use push/pull, requiring verification of pull-up requirements and timing compatibility in the target design.
MAX6337US23D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6337US23D3+T FAQ
1.How can I place an order for MAX6337US23D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6337US23D3+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 MAX6337US23D3+T reliable?
The price and inventory of MAX6337US23D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6337US23D3+T is usually 5 days.
3.What payment methods are accepted for MAX6337US23D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6337US23D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6337US23D3+T?
MAX6337US23D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6337US23D3+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 MAX6337US23D3+T?
For technical support, including MAX6337US23D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6337US23D3+T requirements.
6.How does Aetrix verify that MAX6337US23D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6337US23D3+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 MAX6337US23D3+T meets industry standards.
7.What is the process for return or replacement of MAX6337US23D3+T?
All MAX6337US23D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6337US23D3+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 MAX6337US23D3+T part is unused and in its original packaging.
Return procedure for MAX6337US23D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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