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Analog Devices Inc./Maxim Integrated MAX6337US22D3-T
- Part No.:
- MAX6337US22D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6337US22D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,193
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Product details
Overview
MAX6337US22D3-T from Maxim Integrated is an ultra-low-voltage, open-drain microprocessor supervisory circuit designed for 1.8V–3.3V digital systems. It monitors VCC supply voltage with a factory-trimmed 2.20V reset threshold, asserts active-low RESET during brownout or manual reset, and guarantees valid output down to VCC = 1.0V. Its 100ms minimum reset timeout, 3.3µA supply current, and 4-pin SOT143 package make it suitable for battery-powered instrumentation and automotive control modules.
For engineers reviewing the MAX6337US22D3-T datasheet, MAX6337US22D3-T pinout, MAX6337US22D3-T application, or MAX6337US22D3-T equivalent, key selection criteria include open-drain RESET compatibility with bidirectional µP reset pins (e.g., Motorola 68HC11), immunity to sub-24µs VCC transients, guaranteed operation at 1.0V VCC, and factory-set 2.20V/100ms timing without external components.
Technical Context
The MAX6337US22D3-T implements a precision bandgap-based reset comparator with ±1.8% (25°C) and ±3% (-40°C to +125°C) threshold accuracy across its 2.20V nominal setting. Its internal debounced manual-reset input (MR) features a 20kΩ pull-up resistor and requires only a 160µs minimum pulse width at VCC = 2.6V.
Reset assertion is triggered by VCC falling below 2.20V or MR pulled low; RESET remains active for ≥100ms after VCC rises above threshold or MR is released. The open-drain output supports flexible pull-up configuration and interfaces directly with µPs requiring shared reset bus architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.20V ±1.8% (25°C); ensures reliable brownout detection for 2.5V systems with margin |
| Reset Timeout Period | ≥100ms; holds µP in reset long enough for power stabilization and oscillator startup |
| Supply Voltage Range | 1.0V to 5.5V; operates down to 1.0V VCC while maintaining valid RESET state |
| Supply Current | 3.3µA (typ) at VCC = 2.5V; enables multi-year battery life in portable monitoring devices |
| Output Type | Open-drain active-low RESET; allows wired-OR reset buses and interface with bidirectional µP pins |
| VCC Transient Immunity | Rejects <24µs negative glitches at 10V/ms; prevents false resets during switching noise |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive and industrial embedded use |
Pinout & Package
MAX6337US22D3-T is housed in a 4-pin SOT143 surface-mount package (3.0mm × 1.6mm × 1.1mm), optimized for space-constrained PCB layouts in portable and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and reset logic; must be low-impedance connection |
| 2 - RESET | Active-low open-drain output | Drives low during reset; requires external pull-up to VCC or another rail for logic-level translation |
| 3 - MR | Debounced manual-reset input | Pulled high internally (20kΩ); assert reset by grounding; no external debounce needed |
| 4 - VCC | Power supply input | Supplies internal circuitry; monitored for reset generation; operates from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Open-drain RESET output | Enables shared reset bus with multiple supervisors or µPs using single pull-up resistor |
| Factory-trimmed 2.20V threshold | Eliminates external resistor divider; achieves ±1.8% accuracy at 25°C without calibration |
| 100ms minimum reset timeout | Guarantees sufficient hold time for 2.5V systems with slow-start regulators or crystal oscillators |
| 1.0V minimum operating VCC | Maintains functional reset assertion during deep brownout-critical for automotive cold-crank scenarios |
| 24µs VCC transient rejection | Prevents spurious resets caused by EMI or switching regulator noise on power rail |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: Power sequencing during vehicle ignition and stop-start cycles with wide VCC variation (6V–16V battery, 1.0V cold-crank dip). IC Role / Device Role / Timing Role: Supervises 2.5V microcontroller supply; asserts RESET during VCC < 2.20V and holds ≥100ms post-recovery. Use Value: Prevents ECU firmware corruption during cranking-induced brownout by guaranteeing reset validity down to 1.0V VCC. |
Use Scenario: Long-life battery-powered vital-signs recorder requiring >5-year shelf life and reliable wake-from-sleep reset. IC Role / Device Role / Timing Role: Monitors 1.8V LDO output; triggers system reset on battery sag; leverages 3.3µA ICC to minimize quiescent drain. Use Value: Extends operational battery life while ensuring deterministic reset behavior across temperature (-40°C to +85°C). |
| Industrial PLC I/O Module | Smart Sensor Node (IoT) |
Use Scenario: Harsh-environment programmable logic controller with 24V field power converted to 3.3V logic rail subject to load-switching transients. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse; provides glitch-immune reset via 24µs transient rejection and debounced MR for maintenance mode. Use Value: Eliminates need for external RC debounce or Schmitt-trigger circuits-reducing BOM count and board area. |
Use Scenario: Wireless sensor node powered by coin cell, waking periodically to sample and transmit data. IC Role / Device Role / Timing Role: Supervises 2.5V MCU core voltage; uses open-drain RESET to share reset line with RF transceiver; timed 100ms reset ensures clean boot. Use Value: Enables single-pull-up reset bus architecture, reducing interconnect complexity and PCB layer count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6336US22D3-T | Push/pull active-low RESET output; guaranteed valid down to VCC = 0.7V (not 1.0V) | Requires no external pull-up; unsuitable for wired-OR reset buses or bidirectional µP pins | Select when driving CMOS inputs directly and board space permits dedicated RESET trace |
| TLV803EB22DBZR | 2.2V threshold, open-drain, but only rated to -40°C to +105°C; 1.6µA ICC; 35ms timeout | Lacks automotive-grade temperature range and long timeout; lower leakage but less robust transient immunity | Select for cost-sensitive consumer IoT where extended temp range and 100ms hold time are not required |
Compared with MAX6337US22D3-T, the MAX6336US22D3-T offers lower minimum VCC operation but sacrifices bus-sharing capability, while the TLV803EB22DBZR reduces power and cost at the expense of automotive qualification and reset duration-making MAX6337US22D3-T optimal for safety-critical, thermally demanding, or multi-device reset architectures.
Availability
MAX6337US22D3-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, industrial PLC I/O modules, and smart sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6337US22D3-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 industrial, automotive, communications, and computing applications.
The MAX6335/MAX6336/MAX6337 family delivers ultra-low-voltage, low-power µP supervision with factory-trimmed thresholds and integrated manual reset-targeting space- and power-constrained embedded systems where reliability and minimal external components are critical.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6337US22D3-T?
The MAX6337US22D3-T has a factory-trimmed reset threshold of 2.20V, with ±1.8% accuracy at +25°C and ±3% over the full -40°C to +125°C temperature range. This value is laser-trimmed during production and does not require external calibration or resistor networks-ensuring consistent brownout detection for 2.5V logic systems.
Does MAX6337US22D3-T support operation below 1.8V supply voltage?
Yes, MAX6337US22D3-T is guaranteed to operate and maintain valid RESET assertion down to VCC = 1.0V, making it suitable for deep-brownout conditions such as automotive cold-cranking. Its internal circuitry remains functional in this range, unlike push/pull variants that require ≥0.7V-though RESET output voltage level depends on external pull-up configuration.
What is the purpose of the open-drain output in MAX6337US22D3-T?
The open-drain RESET output in MAX6337US22D3-T enables wired-OR connectivity with other reset sources on a shared bus, supports level translation across different voltage domains via external pull-up, and allows direct interfacing with microcontrollers featuring bidirectional reset pins (e.g., Motorola 68HC11). It requires an external pull-up resistor to define the inactive-state voltage.
How does MAX6337US22D3-T handle power-supply transients?
MAX6337US22D3-T rejects negative-going VCC transients shorter than 24µs when the comparator is overdriven by ≥10mV, per its Typical Operating Characteristics graph. This immunity prevents false resets caused by switching noise or EMI on the supply rail-critical in electrically noisy environments like automotive or industrial motor-control systems.
Is manual reset debounced internally in MAX6337US22D3-T?
Yes, MAX6337US22D3-T includes fully integrated hardware debouncing for the MR input. A logic-low pulse as short as 160µs at VCC = 2.6V reliably asserts reset, eliminating the need for external RC filters or firmware-based debouncing-reducing design complexity and improving reliability in field-deployed equipment.
MAX6337US22D3-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:
- 2.2V
- 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
MAX6337US22D3-T FAQ
1.How can I place an order for MAX6337US22D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6337US22D3-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 MAX6337US22D3-T reliable?
The price and inventory of MAX6337US22D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6337US22D3-T is usually 5 days.
3.What payment methods are accepted for MAX6337US22D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6337US22D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6337US22D3-T?
MAX6337US22D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6337US22D3-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 MAX6337US22D3-T?
For technical support, including MAX6337US22D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6337US22D3-T requirements.
6.How does Aetrix verify that MAX6337US22D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6337US22D3-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 MAX6337US22D3-T meets industry standards.
7.What is the process for return or replacement of MAX6337US22D3-T?
All MAX6337US22D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6337US22D3-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 MAX6337US22D3-T part is unused and in its original packaging.
Return procedure for MAX6337US22D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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