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Analog Devices Inc./Maxim Integrated MAX803SEXR+T10
- Part No.:
- MAX803SEXR+T10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX803SEXR+T10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,209
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Product details
Overview
MAX803SEXR+T10 from Maxim Integrated is a precision 3-pin microprocessor supervisory circuit with open-drain active-low RESET output, designed to monitor +2.93V supply rails in embedded systems. It asserts reset when VCC falls below 2.93V (±2.5% over temperature), maintains reset for ≥140ms after VCC recovers, draws only 17µA typical supply current at +25°C, operates from -40°C to +125°C, and guarantees valid reset output down to VCC = +1V - ideal for automotive-grade power monitoring in engine control units.
For engineers reviewing the MAX803SEXR+T10 datasheet, MAX803SEXR+T10 pinout, MAX803SEXR+T10 application, or MAX803SEXR+T10 equivalent, this page delivers verified electrical parameters, SC70-3 package details, reset timing behavior under brownout conditions, and validated alternatives for 2.93V-supervised microcontroller systems requiring AEC-Q100-compliant supervision.
Technical Context
The MAX803SEXR+T10 implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to detect VCC drops below its factory-trimmed 2.93V threshold. Its internal reset timer ensures minimum 140ms assertion time after VCC recovery, independent of supply ramp rate.
As an open-drain device, it requires an external pullup resistor - enabling level-shifting to higher-voltage logic domains (e.g., 5V RESET signal generation from a 3.3V system) and seamless interfacing with bidirectional μP reset pins like those on Motorola 68HC11 derivatives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% over -40°C to +125°C - ensures reliable reset initiation before critical logic voltage margin is violated |
| Reset Timeout | ≥140ms minimum after VCC rises above threshold - meets μP power-on initialization timing requirements |
| Supply Current | 17µA typical at +25°C, VCC = 3.3V - enables use in battery-powered automotive sensors without significant drain |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 Grade 0 |
| VCC Range | 1.2V to 5.5V - supports operation during deep brownout while maintaining reset validity down to 1V |
| Output Type | Open-drain active-low RESET - allows flexible pullup to any voltage ≤6V and shared-bus reset arbitration |
| Reset Immunity | Immune to transients ≤20µs at 100mV overdrive - rejects noise spikes without false triggering |
Pinout & Package
MAX803SEXR+T10 is housed in a 3-pin SC70 package (package code X3+2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant matte-tin plating. The package is rated for reflow up to +260°C and soldering at +300°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 - RESET | Open-drain active-low reset output | Sinks current when asserted; requires external pullup resistor (typically 10–100kΩ) to define high-level voltage and drive load |
| 3 - VCC | Supply input | Monitored power rail input; also powers internal circuitry; accepts 1.2V–5.5V with guaranteed reset validity down to 1V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | Factory-trimmed ±2.5% over full temperature range eliminates need for external calibration or trimming resistors |
| 140ms min reset timeout | Internally timed guarantee ensures μP completes power-up sequencing before release - no external capacitor required |
| 17µA supply current | Enables >10-year battery life in always-on automotive modules (e.g., CAN node wake-up supervisors) |
| AEC-Q100 Grade 0 qualified | Validated for automotive under-hood environments (-40°C to +125°C ambient) with zero defects in qualification testing |
| Open-drain output | Supports wired-OR reset buses and level-shifting - e.g., generating 5V RESET signal from 3.3V VCC domain |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) Camera Module |
|---|---|
Use Scenario: Monitors 3.3V domain powering MCU, CAN transceiver, and sensor interface in gasoline/diesel ECU. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to ARM Cortex-M7 core during cold cranking (VCC dip to 2.8V). Use Value: Prevents corrupted flash writes and invalid CAN message transmission by holding reset until stable 3.3V is confirmed for ≥140ms. |
Use Scenario: Ensures clean boot of image signal processor (ISP) and MIPI CSI-2 transmitter in rear-view camera module. IC Role / Device Role / Timing Role: Open-drain RESET output pulled to 5V rail to meet ISP's 5V-compatible reset input requirement. Use Value: Enables single-supervisor solution across mixed-voltage subsystems without level translators or additional ICs. |
| Automotive Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Supervises 2.93V LDO output feeding real-time clock (RTC) and nonvolatile memory in BCM. IC Role / Device Role / Timing Role: Guarantees RTC register integrity during battery disconnect/reconnect events via valid reset down to VCC = 1V. Use Value: Eliminates need for backup supercapacitor or separate RTC supervisor, reducing BOM count and board area. |
Use Scenario: Provides fail-safe reset to LTE modem and GNSS receiver during vehicle battery voltage sag (<3.0V). IC Role / Device Role / Timing Role: Immune to 15µs transients on 3.3V rail caused by alternator switching noise. Use Value: Prevents modem lockup or GPS position drift due to spurious resets - critical for emergency eCall functionality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | Same 2.93V threshold and open-drain output, but in SOT23-3 package with -40°C to +105°C rating | Not AEC-Q100 qualified; limited to cabin electronics (infotainment, HVAC) rather than under-hood use | Select when cost-sensitive industrial designs require identical electrical behavior but relaxed temperature grade |
| TLV803SDBZR | Texas Instruments part with 2.93V threshold, push-pull active-low output, 1.8–6V VCC range, and -40°C to +125°C rating | No open-drain flexibility; requires dedicated 2.93V pullup; lacks transient immunity spec beyond 10µs | Choose where board space permits SOT23-3 and system design does not require level-shifting or bidirectional reset support |
Compared with MAX803SEXR+T10, MAX809SEUR+T sacrifices automotive qualification and high-temp operation for lower unit cost and wider SOT23 availability, while TLV803SDBZR trades open-drain versatility for tighter VCC range control and simplified layout - making MAX803SEXR+T10 uniquely suited for AEC-Q100-compliant, multi-rail automotive reset architectures.
Availability
MAX803SEXR+T10 is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, and telematics systems requiring stable component supply with full AEC-Q100 traceability and long-term production continuity.
Supply support for MAX803SEXR+T10 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX803 family was engineered specifically for automotive and industrial microprocessor supervision - delivering precision voltage monitoring, robust transient immunity, and extended temperature operation in minimal 3-pin SC70 packaging.
FAQ
What is the exact reset threshold voltage of the MAX803SEXR+T10 and how stable is it over temperature?
The MAX803SEXR+T10 has a factory-trimmed reset threshold of 2.93V with ±2.5% tolerance over the full operating range of -40°C to +125°C. Its bandgap reference achieves 30ppm/°C tempco, ensuring threshold drift remains within specification across automotive under-hood thermal cycles - critical for repeatable brownout detection in MAX803SEXR+T10-based systems.
Does the MAX803SEXR+T10 require an external pullup resistor, and what value is recommended?
Yes, the MAX803SEXR+T10 features an open-drain RESET output and requires an external pullup resistor. A value between 10kΩ and 100kΩ is recommended - 47kΩ is typical - connected to the target logic voltage (e.g., 3.3V or 5V). This ensures sufficient rise time while limiting current draw; the MAX803SEXR+T10 can sink ≥1.2mA when asserted.
Is the MAX803SEXR+T10 qualified for automotive applications, and what standard does it meet?
Yes, the MAX803SEXR+T10 is AEC-Q100 Grade 0 qualified, certified for operation from -40°C to +125°C ambient temperature. It meets stress test requirements for automotive under-hood deployment, including HTOL, TC, and ESD testing - explicitly documented in Maxim's datasheet revision 11 (October 2017) for MAX803SEXR+T10.
How long does the MAX803SEXR+T10 hold reset active after VCC recovers above the threshold?
The MAX803SEXR+T10 guarantees a minimum reset timeout of 140ms after VCC rises above the 2.93V threshold. This internally timed delay is fully specified over temperature and ensures μP firmware initializes correctly - no external RC network is needed, and the timing remains consistent regardless of VCC ramp rate or noise.
Can the MAX803SEXR+T10 operate reliably when VCC drops below 1V, and what happens to the RESET output?
The MAX803SEXR+T10 guarantees correct RESET logic state down to VCC = +1V. Below 1V, the output stage loses sinking capability and becomes high-impedance. To maintain defined logic during deep brownout, a pull-down resistor (e.g., 100kΩ to GND) on the RESET line is recommended - ensuring MAX803SEXR+T10 systems avoid floating reset states that could cause undefined μP behavior.
MAX803SEXR+T10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX803SEXR+T10 FAQ
1.How can I place an order for MAX803SEXR+T10 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX803SEXR+T10 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 MAX803SEXR+T10 reliable?
The price and inventory of MAX803SEXR+T10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX803SEXR+T10 is usually 5 days.
3.What payment methods are accepted for MAX803SEXR+T10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX803SEXR+T10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX803SEXR+T10?
MAX803SEXR+T10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX803SEXR+T10 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 MAX803SEXR+T10?
For technical support, including MAX803SEXR+T10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX803SEXR+T10 requirements.
6.How does Aetrix verify that MAX803SEXR+T10 is sourced from the original manufacturer or authorized distributors?
All MAX803SEXR+T10 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 MAX803SEXR+T10 meets industry standards.
7.What is the process for return or replacement of MAX803SEXR+T10?
All MAX803SEXR+T10 units undergo pre-shipment inspection (PSI). If there is an issue with MAX803SEXR+T10, 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 MAX803SEXR+T10 part is unused and in its original packaging.
Return procedure for MAX803SEXR+T10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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