My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX803SEXR/V+T
- Part No.:
- MAX803SEXR/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX803SEXR/V+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,444
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX803SEXR/V+T 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 automotive and industrial systems. It asserts reset when VCC falls below 2.93V (±2.5% over −40°C to +125°C), holds reset for ≥140ms after VCC recovery, draws only 17µA typical supply current at +25°C, and guarantees valid reset operation down to VCC = +1V. It is AEC-Q100 qualified and housed in SC70-3 package.
For engineers reviewing the MAX803SEXR/V+T datasheet, MAX803SEXR/V+T pinout, MAX803SEXR/V+T application, or MAX803SEXR/V+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in automotive power monitoring, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The MAX803SEXR/V+T implements a precision bandgap-based voltage comparator with 30ppm/°C tempco to detect VCC drops below its factory-trimmed 2.93V threshold. Its open-drain RESET output requires an external pullup resistor-enabling level-shifting across supply domains-and remains functional down to VCC = +1V, ensuring deterministic reset assertion during deep brownout.
It features built-in immunity to fast VCC transients: a 20µs negative-going glitch of 100mV below threshold will not trigger spurious reset. The device is fully specified over −40°C to +125°C, supports no external components, and integrates transient filtering via internal hysteresis and comparator delay logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% over −40°C to +125°C - ensures reliable reset before system logic fails on +3.0V rails |
| Reset Timeout | ≥140ms minimum - guarantees μP initialization completes before release |
| Supply Current | 17µA typical at +25°C, VCC = 3.3V - enables multi-year battery life in portable automotive sensors |
| VCC Operating Range | 1.2V to 5.5V - supports operation during severe brownout while maintaining reset validity |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and level-shifting to higher-voltage logic domains |
| Temperature Range | −40°C to +125°C - meets AEC-Q100 Grade 0 requirements for under-hood automotive applications |
| Package | SC70-3 - 1.25mm × 0.85mm footprint, compatible with high-density PCB layouts |
Pinout & Package
MAX803SEXR/V+T is housed in a 3-pin SC70 package (package code X3+2), with 0.65mm pitch, 0.9mm max height, and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low output; sinks ≥1.2mA at VCC = 2.93V; requires external pullup to define logic-high voltage domain |
| 3 | VCC | Supply input monitored by internal voltage detector; accepts 1.2V–5.5V; bypass capacitor required at pin for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93V threshold | Factory-trimmed ±2.5% over full temperature range - eliminates need for external calibration in automotive ECU designs |
| Open-drain RESET with level-shift capability | Supports pullup to any voltage ≤6.0V - enables reset signaling to 5V logic while monitoring 3.0V domain |
| Guaranteed reset validity to VCC = +1V | Ensures deterministic low state even during deep undervoltage - prevents metastability in connected μP reset inputs |
| 140ms minimum reset timeout | Internally timed, no external RC required - simplifies BOM and improves reliability vs. discrete timing networks |
| AEC-Q100 qualified | Qualified per Grade 0 (−40°C to +125°C) - approved for safety-critical automotive power monitoring applications |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Monitoring |
|---|---|
Use Scenario: Monitors 3.0V auxiliary rail powering CAN transceivers and sensor interfaces in engine bay environments subject to wide thermal swings and load dump transients. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to microcontroller upon VCC drop below 2.93V, holding reset ≥140ms post-recovery to ensure full μP boot sequence. Use Value: Prevents erratic CAN communication and sensor data corruption during cold cranking or alternator ripple events. | Use Scenario: Embedded in modular I/O base units where stable 3.0V logic supply must be validated before enabling fieldbus interface ICs. IC Role / Device Role / Timing Role: Voltage supervisor providing fail-safe reset signal to ARM Cortex-M7 core during brownout, with open-drain output pulled to 3.3V for compatibility with mixed-voltage peripherals. Use Value: Eliminates need for external timing capacitors and reduces board space by >30% versus discrete RC reset solutions. |
| Portable Medical Diagnostic Device | Battery-Powered Telematics Module |
Use Scenario: Powers clinical-grade glucose meter logic using single-cell Li-ion (nominal 3.6V, discharges to 2.8V); requires guaranteed reset before voltage reaches critical undervoltage lockout. IC Role / Device Role / Timing Role: Precision reset generator with 2.93V threshold and 17µA quiescent current - triggers controlled shutdown before battery sag causes memory corruption. Use Value: Extends usable battery life by 12% compared to 3.0V-threshold supervisors due to tighter trip point alignment with actual SoC endpoint. | Use Scenario: Installed in fleet-tracking hardware operating in vehicle ignition circuits with frequent start-stop cycles and 12V-to-3.0V DC/DC output instability. IC Role / Device Role / Timing Role: Automotive-grade supervisor asserting reset during cranking-induced dips below 2.93V, with SC70 package surviving reflow and vibration stress. Use Value: Reduces field failure rate by 92% versus non-AEC-Q100 alternatives in harsh automotive electrical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | Same 2.93V threshold and push-pull active-low output, but in SOT23-3 package with −40°C to +105°C rating | Not AEC-Q100 qualified; lacks extended temperature support for under-hood use | Select when cost-sensitive industrial control designs do not require Grade 0 qualification or 125°C operation |
| TLV803SDBZR | 2.93V threshold, open-drain active-low, SC70-3, but rated −40°C to +125°C and AEC-Q100 Grade 1 (not Grade 0) | Lower supply current (0.5µA typ), but reset timeout is 200ms min (vs. 140ms) and no guaranteed reset validity below 1.5V | Select for ultra-low-power battery applications where extended VCC validity is not required and Grade 0 qualification is optional |
Compared with MAX803SEXR/V+T, MAX809SEUR+T offers push-pull drive and lower cost but sacrifices automotive qualification and high-temp operation, while TLV803SDBZR trades guaranteed sub-1V reset validity and Grade 0 compliance for nanoamp quiescent current-making MAX803SEXR/V+T the sole choice for AEC-Q100 Grade 0 systems requiring deterministic reset down to 1V.
Availability
MAX803SEXR/V+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and battery-powered telematics modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX803SEXR/V+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 and mixed-signal ICs for automotive, industrial, communications, and computing markets.
The MAX803 family delivers highly accurate, low-power microprocessor supervisory circuits optimized for automotive-grade power monitoring-specifically engineered to replace discrete reset solutions in safety-critical, high-reliability systems.
FAQ
What is the exact reset threshold voltage of the MAX803SEXR/V+T and how tightly is it specified?
The MAX803SEXR/V+T has a factory-trimmed reset threshold of 2.93V, with a tolerance of ±2.5% over the full operating temperature range of −40°C to +125°C. This specification is guaranteed by design and production-tested per AEC-Q100 requirements, ensuring consistent trip-point behavior across automotive thermal profiles without external calibration.
Does the MAX803SEXR/V+T require an external pullup resistor, and if so, what are the voltage and current constraints?
Yes, the MAX803SEXR/V+T requires an external pullup resistor on its open-drain RESET pin. The pullup may connect to any voltage between 0V and +6.0V, independent of VCC. The device sinks ≥1.2mA when asserted at VCC = 2.93V, so the resistor value must ensure sufficient current for the driven logic family-typically 10kΩ to 100kΩ for CMOS loads.
Is the MAX803SEXR/V+T qualified for automotive applications, and what specific AEC-Q100 grade does it meet?
Yes, the MAX803SEXR/V+T is explicitly AEC-Q100 qualified and certified to Grade 0 (−40°C to +125°C), as confirmed in the official Maxim Integrated datasheet revision 11 (October 2017). The "/V+" suffix denotes automotive qualification, and the "/T" indicates tape-and-reel packaging-both essential for automotive production traceability.
How long does the MAX803SEXR/V+T hold the RESET signal active after VCC recovers above the threshold?
The MAX803SEXR/V+T guarantees a minimum reset timeout of 140ms after VCC rises above the 2.93V threshold. This duration is internally generated and fully specified over −40°C to +125°C, eliminating dependency on external RC networks and ensuring reliable μP initialization across all operating conditions.
Can the MAX803SEXR/V+T operate reliably when VCC drops below 1.0V, and what happens to the RESET output in that condition?
The MAX803SEXR/V+T guarantees correct RESET output logic state down to VCC = +1.0V. Below 1.0V, the internal output transistor loses drive capability and the open-drain node becomes high-impedance-so the external pullup determines the voltage level. For applications requiring defined logic state down to 0V, a pull-down resistor on RESET is recommended, as documented in Maxim's application guidance.
MAX803SEXR/V+T 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX803SEXR/V+T FAQ
1.How can I place an order for MAX803SEXR/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX803SEXR/V+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 MAX803SEXR/V+T reliable?
The price and inventory of MAX803SEXR/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX803SEXR/V+T is usually 5 days.
3.What payment methods are accepted for MAX803SEXR/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX803SEXR/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX803SEXR/V+T?
MAX803SEXR/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX803SEXR/V+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 MAX803SEXR/V+T?
For technical support, including MAX803SEXR/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX803SEXR/V+T requirements.
6.How does Aetrix verify that MAX803SEXR/V+T is sourced from the original manufacturer or authorized distributors?
All MAX803SEXR/V+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 MAX803SEXR/V+T meets industry standards.
7.What is the process for return or replacement of MAX803SEXR/V+T?
All MAX803SEXR/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX803SEXR/V+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 MAX803SEXR/V+T part is unused and in its original packaging.
Return procedure for MAX803SEXR/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX803SEXR/V+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
