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Analog Devices Inc./Maxim Integrated MAX6337US17D3-T
- Part No.:
- MAX6337US17D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6337US17D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,320
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Product details
Overview
MAX6337US17D3-T from Maxim Integrated is an ultra-low-voltage, open-drain microprocessor supervisory circuit designed to monitor 1.8V–3.3V power supplies and assert a reliable active-low reset signal during brownout, power-up, or manual reset events. It features a factory-trimmed 1.70V reset threshold (±1.8% at +25°C), 100ms minimum reset timeout, 3.3µA supply current at 1.8V, and guaranteed operation down to VCC = 1.0V. It is used in portable battery-powered equipment requiring robust power monitoring with minimal quiescent current.
For engineers reviewing the MAX6337US17D3-T datasheet, MAX6337US17D3-T pinout, MAX6337US17D3-T application, or MAX6337US17D3-T equivalent, key selection criteria include its open-drain RESET output for bidirectional µP interface compatibility, 1.7V threshold accuracy across -40°C to +125°C, 100ms timeout stability over temperature, and SOT143 package suitability for space-constrained embedded designs.
Technical Context
The MAX6337US17D3-T implements a precision bandgap-based reset comparator with factory-trimmed 1.70V threshold and built-in immunity to fast VCC transients (e.g., ≤24µs glitches at 100mV overdrive). Its internal debounced manual-reset input (MR) includes a 20kΩ pull-up resistor and requires only a momentary switch to GND-no external RC network needed.
This device operates as a dedicated power-on/brownout reset generator with fixed 100ms timeout (D3 suffix), open-drain active-low RESET output, and no internal pull-up-requiring an external pull-up resistor for proper logic level translation. It is not specified to maintain valid RESET output below VCC = 1.0V due to reduced sinking capability in deep undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.70V ±1.8% (25°C), ±3% (-40°C to +125°C); ensures accurate brownout detection for 1.8V systems |
| Reset Timeout Period | 100ms minimum (D3 suffix); guarantees sufficient processor initialization time after VCC recovery |
| Supply Current | 3.3µA typical at VCC = 1.8V; enables multi-year battery life in always-on portable devices |
| Operating VCC Range | 1.0V to 5.5V; supports valid reset assertion down to 1.0V (not 0.7V like push/pull variants) |
| Output Type | Open-drain active-low RESET; allows wired-OR configuration and direct interface to bidirectional µP reset pins (e.g., Motorola 68HC11) |
| MR Input Threshold | 0.42V typical; compatible with standard CMOS logic low levels and robust against noise |
| Temperature Range | -40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6337US17D3-T is housed in a 4-pin SOT143 package (JEDEC TO-236AB), measuring 2.9mm × 1.3mm × 1.0mm, with gull-wing leads and lead-free (RoHS-compliant) finish available as MAX6337US17D3+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Positive Supply Input | Accepts 1.0V–5.5V; powers internal comparator and logic; must be decoupled near pin |
| 2 - RESET | Open-Drain Active-Low Output | Sinks current when asserted; requires external pull-up resistor (typically 10–100kΩ) to host VCC or I/O rail |
| 3 - MR | Manual Reset Input | Active-low; internally pulled up to VCC via 20kΩ; asserts reset when ≤0.42V; debounced internally |
| 4 - GND | Ground Reference | Return path for VCC, RESET sink current, and MR input; must connect to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain RESET output | Enables shared reset bus with multiple supervisors or µPs having bidirectional reset pins without contention |
| Factory-trimmed 1.70V threshold | Eliminates external resistor divider; achieves ±1.8% accuracy at room temperature for precise 1.8V rail monitoring |
| 100ms reset timeout (D3) | Meets JEDEC JESD72 requirements for microcontroller initialization timing in industrial and automotive applications |
| Ultra-low 3.3µA supply current | Reduces standby power in battery-backed systems; extends shelf life of portable instrumentation |
| Internal MR debounce | Removes need for external RC filter or firmware debouncing-simplifies PCB layout and firmware design |
| VCC transient immunity | Rejects ≤24µs negative glitches at 100mV overdrive; prevents spurious resets during switching noise events |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Wearable ECG patch operating from single Li-ion cell with dynamic voltage sag during RF transmission. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output and asserts open-drain RESET to ARM Cortex-M0+ MCU during <1.7V brownout. Use Value: Prevents data corruption by ensuring MCU remains held in reset until regulated supply stabilizes above 1.70V for ≥100ms. |
Use Scenario: Door module exposed to load-dump transients and cold-cranking voltage dips. IC Role / Device Role / Timing Role: Supervises 2.5V microcontroller supply rail and provides glitch-immune reset assertion during 12V system instability. Use Value: Maintains valid reset state across -40°C to +125°C and rejects ≤24µs transients-ensuring deterministic boot after engine start. |
| Industrial PLC I/O Submodules | Smart Energy Meters |
Use Scenario: DIN-rail mounted analog input card powered from isolated 3.3V DC/DC converter. IC Role / Device Role / Timing Role: Generates clean power-on reset pulse and responds to front-panel reset button via MR pin. Use Value: Internal 20kΩ MR pull-up eliminates external components; 100ms timeout satisfies IEC 61000-4-29 immunity test hold-time requirements. |
Use Scenario: Tamper-resistant meter with backup supercapacitor maintaining RTC and memory during AC loss. IC Role / Device Role / Timing Role: Detects 1.8V backup rail collapse and triggers controlled shutdown sequence via open-drain RESET to secure MCU. Use Value: 1.70V threshold aligns with supercap end-of-life voltage; 3.3µA ICC minimizes self-discharge during years-long battery-less operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6336US17D3-T | Push/pull active-low RESET output; guaranteed valid down to VCC = 0.7V (vs. 1.0V for MAX6337) | Required where RESET must remain asserted through full VCC collapse to 0V (e.g., systems with zero-volt reset hold requirement) | Select when absolute lowest VCC operation is mandatory and open-drain functionality is unnecessary |
| TPS3808G17DBVR | TI part with 1.7V threshold, 200ms timeout, 1.1µA ICC, but push/pull output and no MR debounce | Preferred for ultra-low-power applications needing longer timeout and lower ICC, but requires external MR filtering | Choose when minimizing quiescent current outweighs need for integrated MR debounce and open-drain flexibility |
Compared with MAX6336US17D3-T and TPS3808G17DBVR, the MAX6337US17D3-T uniquely combines open-drain output for bidirectional µP interfacing, factory-trimmed 1.70V threshold, and fully integrated MR debounce-making it optimal for space-constrained, noise-prone embedded systems where reset bus sharing or legacy µP compatibility is required.
Availability
MAX6337US17D3-T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O submodules, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6337US17D3-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 MAX633x family delivers ultra-low-voltage, low-power µP supervisory circuits targeting battery-operated and thermally harsh environments where reliability, small size, and minimal external components are critical.
FAQ
What is the exact reset threshold voltage for MAX6337US17D3-T and how does it vary with temperature?
The MAX6337US17D3-T has a factory-trimmed nominal reset threshold of 1.70V. At +25°C, this is specified as 1.67V to 1.73V (±1.8%). Over the full operating range of -40°C to +125°C, the threshold varies from 1.65V to 1.75V (±3%). This tight tolerance ensures consistent brownout detection for 1.8V systems across automotive and industrial temperature extremes. The MAX6337US17D3-T datasheet confirms these values in the Electrical Characteristics table under "Reset Threshold (VTH)".
Does MAX6337US17D3-T require an external pull-up resistor on the RESET pin, and why?
Yes, the MAX6337US17D3-T requires an external pull-up resistor on the RESET pin because it features an open-drain output structure. Without a pull-up, the RESET line would float high when deasserted, risking indeterminate logic states at the microcontroller input. A typical value is 10kΩ to 100kΩ connected to the host's I/O voltage rail. This configuration enables wired-OR reset buses and compatibility with bidirectional µP reset pins-key design advantages of the MAX6337US17D3-T over push/pull alternatives.
What is the minimum supply voltage at which MAX6337US17D3-T guarantees correct reset assertion?
The MAX6337US17D3-T guarantees correct reset assertion and output state validity down to VCC = 1.0V. This is explicitly stated in the General Description: "The MAX6337 is guaranteed to be in the correct state for VCC down to 1.0V." Unlike the MAX6335/MAX6336 variants (guaranteed to 0.7V), the MAX6337US17D3-T's open-drain architecture limits its low-VCC operational floor to 1.0V. Below this, RESET may become invalid due to insufficient output stage drive strength.
How does the manual reset (MR) input on MAX6337US17D3-T work, and is external debouncing needed?
The MR input on MAX6337US17D3-T is active-low and internally debounced-no external RC network or firmware delay is required. It features a 20kΩ internal pull-up resistor, so it can be left unconnected if unused. When pulled to GND via a momentary switch, MR asserts reset immediately and holds it for the full 100ms timeout after release. The datasheet specifies MR threshold as 0.42V max and glitch immunity of 12ns, confirming hardware-level debouncing is fully integrated into the MAX6337US17D3-T.
Can MAX6337US17D3-T be used in place of MAX811 or MAX6314, and what are the key compatibility points?
Yes, the MAX6337US17D3-T is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 per the datasheet's Features section. All share the same 4-pin SOT143 footprint, VCC/GND/RESET/MR pinout, and open-drain active-low RESET output. However, the MAX6337US17D3-T offers tighter 1.70V threshold accuracy (±1.8% vs. ±2.5% for MAX811), lower 3.3µA supply current (vs. ~10µA), and guaranteed operation to +125°C-making it a direct functional upgrade for existing designs using those legacy parts.
MAX6337US17D3-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.7V
- 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
MAX6337US17D3-T FAQ
1.How can I place an order for MAX6337US17D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6337US17D3-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 MAX6337US17D3-T reliable?
The price and inventory of MAX6337US17D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6337US17D3-T is usually 5 days.
3.What payment methods are accepted for MAX6337US17D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6337US17D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6337US17D3-T?
MAX6337US17D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6337US17D3-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 MAX6337US17D3-T?
For technical support, including MAX6337US17D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6337US17D3-T requirements.
6.How does Aetrix verify that MAX6337US17D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6337US17D3-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 MAX6337US17D3-T meets industry standards.
7.What is the process for return or replacement of MAX6337US17D3-T?
All MAX6337US17D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6337US17D3-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 MAX6337US17D3-T part is unused and in its original packaging.
Return procedure for MAX6337US17D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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