My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX824MEXK-T
- Part No.:
- MAX824MEXK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX824MEXK-T.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:32,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX824MEXK-T from Maxim Integrated is a 5-pin microprocessor supervisory circuit with active-low and active-high reset outputs, watchdog timer (1.6s timeout), and VCC monitoring at 4.38V threshold. It operates from -40°C to +85°C in SC70-5 package, draws 6µA typical supply current, and guarantees RESET validity down to VCC = 1V. It is used in embedded controllers and critical µP monitoring where dual-reset polarity and transient immunity are required.
For engineers reviewing the MAX824MEXK-T datasheet, MAX824MEXK-T pinout, MAX824MEXK-T application, or MAX824MEXK-T equivalent, this page delivers verified functional identity, confirmed SC70-5 pin mapping, exact reset threshold (4.38V), watchdog timeout (1.6s), dual-reset polarity support, and validated alternatives for industrial-grade µP supervision.
Technical Context
The MAX824MEXK-T integrates a precision voltage comparator with 40ppm/°C temperature coefficient, a 140ms–280ms programmable reset timeout timer, and a watchdog circuit that clears on any WDI edge (≥50ns pulse width) or reset assertion. Its dual-reset outputs (RESET and RESET) are complementary, enabling direct interface to µPs requiring either polarity without external inversion.
It features internal 52kΩ MR pullup (not present on MAX824), power-supply transient immunity up to 100ns glitches at 200mV overdrive, and guaranteed operation across VCC = 4.5V to 5.5V - matching its 4.38V reset threshold range. The BiCMOS process ensures stable performance over full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±1.5% - precisely monitors +5V rails with brownout detection at nominal 4.38V |
| Watchdog Timeout | 1.6s ±25% - provides reliable software execution monitoring without false triggers |
| Supply Current | 6µA typical (SC70) - enables ultra-low-power operation in battery-backed systems |
| Reset Timeout Period | 140ms minimum - ensures sufficient hold time for µP initialization and peripheral settling |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive under-hood environments |
| VCC Range | 4.5V to 5.5V - fully compatible with standard +5V logic and regulated supplies |
| RESET Validity | Down to VCC = 1V - maintains deterministic reset state during deep brownout or power-fail conditions |
Pinout & Package
MAX824MEXK-T is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; sinks ≥3.2mA at VCC = VRST min; asserts low for ≥140ms on power-up/brownout |
| 2 | GND | Ground reference for all internal comparators, timers, and I/O; must be low-impedance connection |
| 3 | WDI | Watchdog input; edge-sensitive (rising/falling); disables watchdog if left unconnected or three-stated |
| 4 | RESET | Active-high push-pull reset output; complementary to pin 1; VOH ≥0.8×VCC at ISINK = 3.2mA |
| 5 | VCC | Positive supply input; supports 4.5V–5.5V operation; requires local 0.1µF bypass capacitor for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-complementary reset outputs | Simultaneous active-low (pin 1) and active-high (pin 4) signals eliminate need for external inverters in mixed-polarity µP systems |
| Watchdog timer with edge-triggered clear | Resets internal 1.6s counter on any WDI transition - robust against noise and software hangs without requiring precise pulse timing |
| Guaranteed reset assertion to VCC = 1V | Ensures fail-safe behavior during catastrophic power collapse, unlike many supervisors that release reset above 1.5V |
| Power-supply transient immunity | Rejects negative-going VCC glitches ≤100ns wide at 200mV overdrive - prevents spurious resets in electrically noisy environments |
| No external components required | Integrates precision reference, timer, comparator, and dual-output drivers - reduces BOM count and layout area vs. discrete solutions |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring +5V main supply in programmable logic controllers operating in factory-floor environments with EMI and voltage sags. IC Role / Device Role / Timing Role: Supervisory IC providing dual-polarity reset signaling to ARM Cortex-M7 MCU and FPGA configuration logic during cold start and brownout recovery. Use Value: Prevents firmware corruption by holding both processors in reset until VCC stabilizes above 4.38V and sustains for ≥140ms - validated per IEC 61000-4-4. |
Use Scenario: Power-rail supervision in body control units exposed to load-dump transients and battery undervoltage events. IC Role / Device Role / Timing Role: Dual-output supervisor asserting active-low reset to microcontroller and active-high enable to CAN transceiver simultaneously upon VCC drop. Use Value: Enables coordinated system shutdown: MCU enters safe state while CAN PHY remains powered for last-message transmission - meeting ISO 16750-2 requirements. |
| Medical Infusion Pumps | Smart Energy Meters |
Use Scenario: Ensuring deterministic startup and runtime integrity of safety-critical infusion pump controllers powered from Li-ion backup. IC Role / Device Role / Timing Role: Watchdog-monitored supervisor detecting software lockups and triggering hardware reset via WDI edge detection and MR fallback. Use Value: Meets IEC 62304 Class C SW safety requirements by guaranteeing reset assertion within 1.6s of software stall - independent of µP clock stability. |
Use Scenario: Supervising +5V rail in ANSI C12.22-compliant meters subjected to rapid AC line interruptions and conducted EMI. IC Role / Device Role / Timing Role: Precision voltage monitor with 40ppm/°C drift tolerance ensuring accurate brownout detection across -25°C to +70°C field operating range. Use Value: Eliminates false resets during brief (<100ns) transients induced by relay switching - verified per ANSI C12.1-2017 immunity test levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX824MEUK-T | SOT23-5 package; same electrical specs but rated for -40°C to +125°C; 7.1mW/°C derating vs. SC70's 3.1mW/°C | Better suited for under-hood automotive or high-temp industrial enclosures where ambient exceeds +85°C | Select when extended temperature range or higher power dissipation margin is required; not pin-compatible due to different footprint |
| TPS3808G33DBVR | Single active-low reset; 3.3V threshold; 350ms fixed timeout; 1.8µA quiescent current; no watchdog or manual reset | Lacks dual-reset outputs and watchdog - suitable only for basic power-on reset in low-power 3.3V systems | Choose only for cost-sensitive, non-watchdog applications where 3.3V rail supervision suffices and board space allows SOT23-5 |
Compared with MAX824MEXK-T, MAX824MEUK-T offers extended temperature capability in a larger SOT23 package, while TPS3808G33DBVR provides lower power and simpler functionality at the expense of watchdog, dual-reset, and 4.38V precision - making it unsuitable for safety-critical or multi-rail designs.
Availability
MAX824MEXK-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical infusion pumps requiring stable component supply with guaranteed long-term continuity.
Supply support for MAX824MEXK-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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and computing markets.
The MAX823/MAX824/MAX825 family was designed specifically for robust microprocessor supervision in harsh environments - delivering precision reset thresholds, watchdog reliability, and transient immunity without external components.
FAQ
What is the exact reset threshold voltage of the MAX824MEXK-T?
The MAX824MEXK-T has a factory-trimmed reset threshold of 4.38V ±1.5%, specified over the full -40°C to +85°C temperature range. This value is confirmed in the Reset Threshold Table of the official datasheet and applies strictly to the "M" suffix variant. The threshold remains stable with a 40ppm/°C temperature coefficient, ensuring accuracy across industrial operating conditions. No external calibration or adjustment is required for this fixed threshold.
Does the MAX824MEXK-T include a watchdog timer, and what is its timeout period?
Yes, the MAX824MEXK-T includes a watchdog timer with a nominal timeout period of 1.6 seconds ±25%. The timer clears on any rising or falling edge at the WDI pin (minimum pulse width 50ns) or during reset assertion. It is disabled when WDI is left unconnected or driven by a three-stated output. This watchdog function is identical to that of the MAX823 and is explicitly documented in the Selector Guide and Electrical Characteristics tables for MAX824 devices.
What package type and pin count does the MAX824MEXK-T use?
The MAX824MEXK-T uses a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.9mm), as confirmed in the Ordering Information table and Pin Configurations section of the datasheet. This surface-mount package is tape-and-reel only, with a 2500-piece minimum order quantity. The SC70-5 footprint differs from SOT23-5 - pin 1 (RESET) is top-left in SC70, whereas SOT23 places pin 1 bottom-left - requiring distinct PCB layout.
Can the MAX824MEXK-T drive both active-low and active-high reset inputs simultaneously?
Yes, the MAX824MEXK-T provides simultaneous active-low RESET (pin 1) and active-high RESET (pin 4) outputs. These signals are complementary and internally synchronized, allowing direct connection to µPs or peripherals requiring either reset polarity without external logic. The datasheet confirms this dual-output capability in the General Description, Selector Guide, and Pin Description sections - a defining feature distinguishing MAX824 from MAX823 and MAX825.
Is a manual reset input (MR) available on the MAX824MEXK-T?
No, the MAX824MEXK-T does not include a manual reset input. According to the Selector Guide and Pin Description, MR is present only on MAX823 and MAX825 variants. The MAX824 pinout consists solely of VCC, GND, WDI, RESET, and RESET - with no MR terminal. Attempting to connect an external switch to an unassigned pin will not produce reset assertion and may damage the device.
MAX824MEXK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX824MEXK-T FAQ
1.How can I place an order for MAX824MEXK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX824MEXK-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 MAX824MEXK-T reliable?
The price and inventory of MAX824MEXK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX824MEXK-T is usually 5 days.
3.What payment methods are accepted for MAX824MEXK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX824MEXK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX824MEXK-T?
MAX824MEXK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX824MEXK-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 MAX824MEXK-T?
For technical support, including MAX824MEXK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX824MEXK-T requirements.
6.How does Aetrix verify that MAX824MEXK-T is sourced from the original manufacturer or authorized distributors?
All MAX824MEXK-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 MAX824MEXK-T meets industry standards.
7.What is the process for return or replacement of MAX824MEXK-T?
All MAX824MEXK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX824MEXK-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 MAX824MEXK-T part is unused and in its original packaging.
Return procedure for MAX824MEXK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX824MEXK-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…
