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Analog Devices Inc./Maxim Integrated MAX6337US16D3-T
- Part No.:
- MAX6337US16D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6337US16D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,458
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Product details
Overview
MAX6337US16D3-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed for ultra-low-voltage power monitoring in 1.8V–3.3V digital systems. It asserts reset when VCC falls below 1.60V or manual reset (MR) is triggered, maintains reset for ≥100ms after recovery, draws only 3.3µA at 2.5V, and operates down to VCC = 1.0V - enabling reliable brownout detection in portable and automotive controllers.
For engineers reviewing the MAX6337US16D3-T datasheet, MAX6337US16D3-T pinout, MAX6337US16D3-T application, or MAX6337US16D3-T equivalent, key selection criteria include its factory-trimmed 1.60V reset threshold, 100ms minimum timeout, SOT143-4 package compatibility with MAX811/MAX6314, and open-drain output optimized for bidirectional µP reset pins like those on Motorola 68HC11.
Technical Context
The MAX6337US16D3-T implements a precision bandgap-based reset comparator with ±1.8% (25°C) and ±3% (-40°C to +125°C) threshold tolerance, immune to fast VCC transients up to 24µs at 10V/ms slew rate. Its internal 20kΩ MR pull-up eliminates external components for manual reset functionality.
Reset assertion is synchronized to both VCC decay and MR logic-low events, with guaranteed RESET validity down to VCC = 1.0V - distinct from the 0.7V spec of MAX6335/MAX6336 push/pull variants. The open-drain output requires an external pull-up resistor and supports wired-OR configurations with other reset sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±1.8% (25°C), ±3% (-40°C to +125°C) - ensures accurate brownout detection for 1.8V systems without calibration |
| Reset Timeout Period | ≥100ms - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 3.3µA at VCC = 2.5V - enables multi-year battery life in portable equipment |
| VCC Operating Range | 1.0V to 5.5V - supports operation during deep brownout while maintaining valid reset state |
| Output Type | Open-drain active-low - allows direct interface to bidirectional µP reset pins and wired-OR reset buses |
| MR Input | Debounced, internally pulled up to VCC via 20kΩ - eliminates need for external RC debounce network |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6337US16D3-T is housed in a 4-pin SOT143 package (JEDEC TO-253-4), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and lead-free (RoHS-compliant) finish available as MAX6337US16D3+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low output; requires external pull-up resistor (typically 10–100kΩ) to VCC or another logic rail |
| 3 | MR | Manual reset input; logic-low assertion triggers reset; internally pulled up to VCC (20kΩ), so left floating if unused |
| 4 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference; operates from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 1.60V with ±1.8% room-temp accuracy - eliminates external resistor divider and calibration effort |
| Ultra-low supply current | 3.3µA at 2.5V - reduces quiescent power in always-on monitoring circuits |
| Transient-immune reset comparator | Rejects VCC glitches ≤24µs at 10V/ms - prevents false resets during switching noise or ESD events |
| Guaranteed operation down to VCC = 1.0V | Valid RESET output state maintained until supply drops to 1.0V - critical for fail-safe shutdown sequencing |
| Pin-compatible footprint | Direct replacement for MAX811/MAX812 and MAX6314/MAX6315 - enables drop-in upgrade in existing designs |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
|
Use Scenario: Monitors 1.8V core supply in engine control microcontroller during cold cranking, where battery voltage dips to 6–8V causing regulator output sag. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to prevent corrupted firmware execution during brownout. Use Value: 1.60V threshold aligns precisely with 1.8V rail collapse point; 100ms timeout ensures full MCU register initialization before code execution resumes. |
Use Scenario: Powers on/off sequence management in handheld ECG device with lithium coin-cell battery and low-power ARM Cortex-M0. IC Role / Device Role / Timing Role: System-level reset generator triggered by VCC decay or user-initiated emergency reset via tactile switch. Use Value: 3.3µA quiescent current extends battery life beyond 5 years in standby; debounced MR input eliminates switch bounce-induced spurious resets. |
| Industrial PLC I/O Module | Telematics Control Unit (TCU) |
|
Use Scenario: Supervises isolated 2.5V logic supply feeding FPGA configuration memory in harsh factory-floor environment. IC Role / Device Role / Timing Role: Fault-tolerant reset source interfacing with FPGA's bidirectional PROG_B pin using open-drain topology. Use Value: Open-drain output enables safe wired-OR with FPGA's internal reset generator; -40°C to +125°C rating ensures reliability near motor drives. |
Use Scenario: Validates 3.3V power rail integrity during vehicle ignition cycle and GPS module wake-up sequences. IC Role / Device Role / Timing Role: Dual-trigger reset supervisor responding to both supply droop and CAN-based remote diagnostic reset command. Use Value: MR pin accepts logic-low signal from CAN transceiver's fault output; 100ms timeout satisfies ISO 16750-2 cold-cranking timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6336US16D3-T | Push/pull active-low RESET output; guaranteed RESET validity down to VCC = 0.7V | Requires no external pull-up; suitable for systems where RESET must remain asserted below 1.0V | Select when interfacing with high-impedance CMOS inputs that cannot tolerate floating states during deep brownout |
| MAX6314US16D3-T | Same 1.60V threshold and 100ms timeout, but lacks MR input and uses different internal architecture | Not suitable for manual reset applications; limited to power-only supervision | Choose only when manual reset functionality is unnecessary and legacy MAX6314 footprint reuse is required |
Compared with MAX6337US16D3-T, the MAX6336US16D3-T offers stronger low-VCC reset assurance but sacrifices wired-OR flexibility, while the MAX6314US16D3-T reduces feature set to cut cost - making MAX6337US16D3-T optimal for bidirectional reset bus integration with manual override capability.
Availability
MAX6337US16D3-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, industrial PLC modules, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6337US16D3-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, and communications markets.
The MAX633x family delivers ultra-low-voltage, low-power µP supervisory circuits targeting space-constrained, battery-sensitive, and high-reliability applications where precise reset thresholding and minimal external components are essential.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6337US16D3-T?
The MAX6337US16D3-T has a factory-trimmed reset threshold of 1.60V, with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C operating range. This value is laser-trimmed during production and specified in Table 1 of the datasheet; it enables accurate brownout detection for 1.8V systems without external calibration components.
Does MAX6337US16D3-T support manual reset functionality, and how is it implemented?
Yes, MAX6337US16D3-T includes a debounced manual-reset input (MR) pin. A logic-low pulse on MR asserts reset regardless of VCC level, and reset remains active for ≥100ms after MR returns high. An internal 20kΩ pull-up resistor allows MR to be left unconnected when unused - eliminating external passive components required by most discrete reset solutions.
Why does MAX6337US16D3-T use an open-drain output instead of push/pull?
The open-drain output on MAX6337US16D3-T enables wired-OR reset bus configurations and direct interface with microcontrollers featuring bidirectional reset pins (e.g., Motorola 68HC11). Unlike push/pull variants, it avoids contention when multiple reset sources share the same line - a critical requirement in complex embedded systems where FPGA, PMIC, and µP may all drive reset.
What is the minimum VCC voltage at which MAX6337US16D3-T guarantees valid RESET output behavior?
MAX6337US16D3-T guarantees valid RESET output behavior down to VCC = 1.0V, unlike the 0.7V specification of MAX6335/MAX6336. Below 1.0V, sinking capability degrades and RESET may float; this is intentional design trade-off to optimize for open-drain interoperability rather than sub-1V operation.
Is MAX6337US16D3-T pin-compatible with older Maxim supervisors like MAX811?
Yes, MAX6337US16D3-T is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 in the SOT143-4 package. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC - identical layout and footprint. This allows direct drop-in replacement in legacy designs, provided the open-drain output and 1.0V VCC lower limit are verified in the target application.
MAX6337US16D3-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:
- 1.6V
- 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
MAX6337US16D3-T FAQ
1.How can I place an order for MAX6337US16D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6337US16D3-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 MAX6337US16D3-T reliable?
The price and inventory of MAX6337US16D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6337US16D3-T is usually 5 days.
3.What payment methods are accepted for MAX6337US16D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6337US16D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6337US16D3-T?
MAX6337US16D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6337US16D3-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 MAX6337US16D3-T?
For technical support, including MAX6337US16D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6337US16D3-T requirements.
6.How does Aetrix verify that MAX6337US16D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6337US16D3-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 MAX6337US16D3-T meets industry standards.
7.What is the process for return or replacement of MAX6337US16D3-T?
All MAX6337US16D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6337US16D3-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 MAX6337US16D3-T part is unused and in its original packaging.
Return procedure for MAX6337US16D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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