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Analog Devices Inc./Maxim Integrated MAX6335US16D3-T
- Part No.:
- MAX6335US16D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6335US16D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,579
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Product details
Overview
MAX6335US16D3-T from Maxim Integrated is a push/pull, active-high 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 MR is pulled low, maintains reset for ≥100ms after recovery, operates down to 0.7V supply, draws only 3.3µA at 2.5V, and is housed in a 4-pin SOT143 package for space-constrained portable and automotive applications.
For engineers reviewing the MAX6335US16D3-T datasheet, MAX6335US16D3-T pinout, MAX6335US16D3-T application, or MAX6335US16D3-T equivalent, key selection criteria include its 1.60V factory-trimmed reset threshold, 100ms minimum timeout, guaranteed RESET validity to VCC = 0.7V, debounced manual-reset input, and compatibility with brownout detection in battery-powered controllers and critical µP power domains.
Technical Context
The MAX6335US16D3-T implements a precision bandgap-based reset comparator with ±1.8% (TYP) room-temperature threshold accuracy and ±3% over –40°C to +125°C. Its internal 20kΩ MR pull-up eliminates external components, and the reset timeout is factory-programmed to 100ms (suffix D3), ensuring deterministic release timing after power recovery or manual reset deassertion.
Unlike open-drain variants (e.g., MAX6337), this device uses a push/pull output stage delivering VOH ≥0.8VCC (ISOURCE = 200µA, VCC ≥1.8V) and VOL ≤0.3V (ISINK = 500µA, VCC ≥1.8V), enabling direct interface with high-impedance CMOS µP reset inputs without external pull-up resistors - critical for low-power portable equipment where leakage and board area are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±0.03V (TYP), factory-trimmed; ensures reliable brownout detection for 1.8V logic rails under voltage sag. |
| Reset Timeout Period | ≥100ms; guarantees sufficient hold time for µP initialization and peripheral stabilization after power recovery. |
| Supply Voltage Range | 0.7V to 5.5V; supports operation during deep brownout and enables use in single-cell Li-ion or coin-cell powered devices. |
| Supply Current | 3.3µA (TYP) at VCC = 2.5V; minimizes quiescent drain in always-on monitoring circuits. |
| Output Type | Push/pull, active-high RESET; drives high without external components and avoids floating states during low-VCC conditions. |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial embedded environments. |
| MR Input Threshold | 0.5V (MAX); compatible with standard CMOS logic levels and tolerant of noise on manual-reset lines. |
Pinout & Package
MAX6335US16D3-T is packaged in a 4-pin SOT143 surface-mount package (3.0mm × 1.6mm × 1.1mm), optimized for compact PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Return path for all internal circuitry; must be connected to system ground plane for stable reset threshold and noise immunity. |
| 2: RESET | Active-high reset output | Drives high during reset assertion; interfaces directly with µP reset pins requiring active-high logic without pull-up resistors. |
| 3: MR | Manual reset input | Logic-low active input with internal 20kΩ pull-up; accepts momentary switch to GND; debounced internally to reject contact bounce. |
| 4: VCC | Power supply input | Accepts 0.7V–5.5V; powers internal comparator, timer, and output driver; supplies bias for MR pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating supply | Enables supervision during severe brownout; maintains functional reset assertion even as VCC collapses toward single-cell battery end-of-life (~0.9V). |
| Factory-trimmed 1.60V reset threshold | Eliminates external resistor dividers and calibration; reduces BOM count and improves long-term stability vs. discrete solutions. |
| 100ms factory-programmed timeout | Guarantees µP core and memory initialization completes before release; avoids race conditions in multi-clock-domain systems. |
| Debounced manual-reset input | Removes need for RC filters or firmware debounce; simplifies hardware design and improves reliability of field-service reset functions. |
| 4-pin SOT143 footprint | Matches MAX811/MAX812 and MAX6314/MAX6315 footprints; allows drop-in replacement in existing designs without layout changes. |
Applications
| Automotive Engine Control Units | Portable Medical Monitors |
|---|---|
Use Scenario: Monitoring 1.8V sensor interface rails in ECU modules exposed to cold-crank voltage sags (down to 0.6V). IC Role / Device Role / Timing Role: Active-high RESET supervisor asserting reset during battery dip and holding ≥100ms post-recovery to ensure full MCU reinitialization. Use Value: Prevents erratic ECU behavior during engine start by guaranteeing deterministic reset timing independent of VCC ramp rate. | Use Scenario: Power supervision in handheld ECG units powered by single 3.0V lithium coin cell with aging-induced voltage droop. IC Role / Device Role / Timing Role: Ultra-low-voltage supervisor detecting 1.60V threshold crossing and asserting active-high reset to halt data acquisition during brownout. Use Value: Extends usable battery life by enabling operation down to 0.7V while maintaining valid reset signaling - no false triggers or missed resets. |
| Industrial PLC I/O Modules | Smart Meter Communication Subsystems |
Use Scenario: Ensuring reliable µP restart after transient surges on 2.5V isolated power rails in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Push/pull reset generator with 100ms timeout and MR input for maintenance-mode forced reset via front-panel button. Use Value: Eliminates need for external debounce circuitry and pull-up resistors, reducing component count and improving long-term field reliability. | Use Scenario: Supervising 1.8V RF transceiver supply in AMI smart meters subject to load-switching transients and temperature extremes. IC Role / Device Role / Timing Role: High-immunity reset IC rejecting <20µs negative VCC glitches while asserting clean active-high reset for modem controller recovery. Use Value: Maintains communication uptime by preventing spurious resets during grid-switching events - validated across –40°C to +125°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US16D3-T | Same 1.60V threshold and 100ms timeout, but rated only to +85°C (not +125°C); lower ICC (2.5µA TYP at 2.5V). | Suitable for commercial-grade portable electronics, not automotive or extended-temperature industrial use. | Select MAX6335US16D3-T when operation beyond +85°C or AEC-Q200 alignment is required. |
| TLV803EB16DBZR | 1.63V threshold (±0.5%), 140ms timeout, 0.9V min VCC, SOT-23-3 package; no MR input. | Lacks manual reset capability and operates at higher minimum VCC; smaller footprint but no debounced MR pin. | Choose MAX6335US16D3-T when MR functionality, 0.7V operation, or SOT143 pin compatibility is mandatory. |
Compared with MAX6315US16D3-T and TLV803EB16DBZR, the MAX6335US16D3-T uniquely combines automotive-grade temperature range (–40°C to +125°C), integrated debounced MR, 0.7V operational floor, and pin compatibility with legacy Maxim supervisors - making it the only option meeting full requirements for ruggedized embedded reset control.
Availability
MAX6335US16D3-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6335US16D3-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 series belongs to Maxim's µP supervisory product line, engineered specifically for ultra-low-voltage, low-power reset generation in space- and energy-constrained embedded systems where reliability under brownout and cold-crank conditions is critical.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6335US16D3-T?
The MAX6335US16D3-T has a factory-trimmed reset threshold of 1.60V, with typical tolerance of ±0.03V at +25°C and ±0.05V over –40°C to +125°C. This precise threshold enables accurate brownout detection for 1.8V logic systems and is laser-trimmed during production - no external adjustment is needed. The MAX6335US16D3-T datasheet specifies VTH = 1.60V in Table 1 and confirms it in the Selector Guide.
Does MAX6335US16D3-T support manual reset, and how is it implemented?
Yes, MAX6335US16D3-T includes a debounced manual-reset (MR) input on Pin 3. A logic-low pulse ≥160µs on MR asserts active-high RESET, which remains asserted for the full 100ms timeout after MR returns high. An internal 20kΩ pull-up resistor allows MR to be left unconnected if unused. No external RC network is required - the MAX6335US16D3-T handles debouncing internally, simplifying PCB layout and improving reliability.
What is the minimum supply voltage at which MAX6335US16D3-T guarantees valid RESET output?
The MAX6335US16D3-T guarantees valid RESET output down to VCC = 0.7V - meaning both VOH and VOL remain within specification (VOH ≥0.8VCC, VOL ≤0.3V) across the full operating temperature range. This ultra-low operating floor allows the MAX6335US16D3-T to supervise single-cell Li-ion or coin-cell systems through end-of-life voltage decay, unlike most supervisors that fail below 1.0V.
Is MAX6335US16D3-T pin-compatible with other Maxim reset ICs?
Yes, MAX6335US16D3-T is pin-compatible with MAX811/MAX812 and MAX6314/MAX6315 in the 4-pin SOT143 package. Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC - identical mapping and footprint. This enables drop-in replacement in legacy designs without PCB modification, preserving signal integrity and layout validation effort for the MAX6335US16D3-T.
What is the reset timeout period for MAX6335US16D3-T, and is it adjustable?
The MAX6335US16D3-T features a factory-programmed reset timeout period of 100ms minimum (suffix D3), fixed at wafer sort and non-adjustable externally. This duration is guaranteed over –40°C to +125°C and ensures sufficient hold time for complex µP boot sequences. Unlike some programmable supervisors, the MAX6335US16D3-T does not support external capacitor timing - the 100ms timeout is intrinsic to the device and fully characterized in the datasheet.
MAX6335US16D3-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:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6335US16D3-T FAQ
1.How can I place an order for MAX6335US16D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6335US16D3-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 MAX6335US16D3-T reliable?
The price and inventory of MAX6335US16D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6335US16D3-T is usually 5 days.
3.What payment methods are accepted for MAX6335US16D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6335US16D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6335US16D3-T?
MAX6335US16D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6335US16D3-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 MAX6335US16D3-T?
For technical support, including MAX6335US16D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6335US16D3-T requirements.
6.How does Aetrix verify that MAX6335US16D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6335US16D3-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 MAX6335US16D3-T meets industry standards.
7.What is the process for return or replacement of MAX6335US16D3-T?
All MAX6335US16D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6335US16D3-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 MAX6335US16D3-T part is unused and in its original packaging.
Return procedure for MAX6335US16D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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