My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX825SEXK-T
- Part No.:
- MAX825SEXK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX825SEXK-T.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:13,678
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX825SEXK-T from Maxim Integrated is a 5-pin SC70-packaged microprocessor supervisory circuit with manual reset input and complementary active-high reset output, designed for precision monitoring of +2.93V power supplies. It delivers guaranteed RESET validity down to VCC = 1V, 140ms minimum power-on reset timeout, and 2µA supply current at +25°C. It is used in embedded controllers and portable battery-powered equipment requiring reliable brownout detection and operator-initiated reset.
For engineers reviewing the MAX825SEXK-T datasheet, MAX825SEXK-T pinout, MAX825SEXK-T application, or MAX825SEXK-T equivalent, this page provides verified functional identity, exact pin roles, confirmed reset threshold (2.93V), true operating current (2µA SC70), and validated alternative options for +2.93V supervisory applications.
Technical Context
The MAX825SEXK-T implements a precision voltage comparator with 5mV hysteresis and 40ppm/°C temperature coefficient to monitor VCC against a factory-trimmed 2.93V threshold. Its internal reset timer guarantees ≥140ms assertion after power-up or brownout recovery, and its MR input features a 52kΩ internal pullup resistor enabling direct CMOS switch interface without external components.
Unlike the MAX823/MAX824 variants, the MAX825SEXK-T excludes watchdog functionality but includes both active-low RESET and active-high RESET outputs - providing flexible reset signaling for µPs with unidirectional or bidirectional reset pins while maintaining full VCC transient immunity down to 1V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±15mV at +25°C; ensures reliable reset assertion when +2.93V supply drops below specification limit |
| Supply Current | 2µA typical (SC70 package); enables ultra-low-power operation in battery-backed systems |
| Reset Timeout | 140–280ms; guarantees sufficient hold time for µP initialization during power ramp-up |
| VCC Operating Range | +3.0V to +3.6V; matches nominal +3.3V rail with 10% tolerance margin |
| RESET Validity | Guaranteed down to VCC = 1V; supports deep brownout detection and safe low-voltage shutdown |
| MR Input Logic | VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC; compatible with standard CMOS logic drivers and momentary switches |
| Reset Hysteresis | 5mV; prevents chatter during slow VCC recovery near threshold |
Pinout & Package
MAX825SEXK-T is housed in a 5-pin SC70-5 package (JEDEC MO-203AA), measuring 2.0mm × 2.1mm × 0.9mm, with gull-wing leads and lead-free finish (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Open-drain output asserted low during reset; sinks up to 1.2mA at VCC = 3.6V |
| 2 | GND | Ground reference for all internal comparators and timing circuits |
| 3 | RESET (active-high) | Pullup-enabled complementary output; sources 0.8×VCC when high, sinks 0.3V when low |
| 4 | MR (manual reset) | Active-low input with 52kΩ internal pullup; asserts reset on logic low, holds reset for 200ms after release |
| 5 | VCC | Positive supply input; powers internal circuitry and defines reset threshold scaling |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internal pullup on MR and precision voltage reference eliminate need for resistors, capacitors, or trimming |
| Power-supply transient immunity | Rejects negative-going VCC glitches <100ns wide at 2.93V overdrive; avoids spurious resets in noisy environments |
| Guaranteed reset at 1V VCC | Ensures fail-safe behavior during deep brownout or backup-battery switchover scenarios |
| Complementary reset outputs | Simultaneous active-low and active-high signals simplify interface to diverse µP reset architectures |
| Factory-trimmed threshold accuracy | ±15mV tolerance at +25°C and full temp range; eliminates system-level calibration effort |
Applications
| Embedded Controllers | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Industrial PLC modules powered by regulated +3.3V rails with occasional line sags. IC Role / Device Role / Timing Role: Monitors VCC and asserts reset if supply dips below 2.93V; holds reset for ≥140ms to ensure clean µP restart. Use Value: Prevents corrupted firmware execution during transient brownouts without adding discrete supervision circuitry. | Use Scenario: Handheld medical meters using coin-cell batteries with gradual voltage decay. IC Role / Device Role / Timing Role: Detects end-of-life battery voltage drop below 2.93V and triggers controlled shutdown via active-high RESET. Use Value: Enables graceful data save and display blanking before complete power loss, extending usable battery life. |
| Intelligent Instruments | Automotive Systems |
Use Scenario: Digital multimeters with isolated USB communication and self-test routines. IC Role / Device Role / Timing Role: Provides manual reset via front-panel button (MR) and automatic reset on power cycle (VCC monitoring). Use Value: Eliminates need for separate pushbutton debouncing circuit and external reset supervisor IC. | Use Scenario: Body control modules exposed to load-dump transients and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises +3.3V domain derived from automotive DC-DC converter; ignores fast VCC glitches per ISO 7637-2 Pulse 4. Use Value: Maintains system reliability without false resets during engine cranking or alternator switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX825REXK-T | 2.63V reset threshold; identical SC70-5 package, pinout, and MR/RESET functionality | Targeted at +2.5V systems instead of +3.3V; requires redesign of supply rail or voltage divider | Select when monitoring +2.5V rails with same low-power, manual-reset requirements |
| TPS3808G33DBVR | 2.93V threshold, SOT23-5 package, 1.8µA quiescent current, but lacks active-high RESET output | Requires external inverter or µP with only active-low reset input; no complementary signal support | Choose for cost-sensitive designs where dual reset polarity is unnecessary and SOT23 layout is preferred |
Compared with MAX825SEXK-T, MAX825REXK-T offers identical architecture at a lower threshold for +2.5V domains, while TPS3808G33DBVR reduces supply current slightly but removes critical active-high reset capability - making MAX825SEXK-T uniquely suited for systems needing both reset polarities in ultra-low-power SC70 form factor.
Availability
MAX825SEXK-T is available at Aetrix Electronics and suitable for embedded controllers, portable/battery-powered equipment, and intelligent instruments requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for MAX825SEXK-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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX823/MAX824/MAX825 family was designed specifically for microprocessor supervision in space-constrained, low-power systems - delivering integrated reset, manual reset, and watchdog functions in minimal 5-pin SC70/SOT23 footprints.
FAQ
What is the exact reset threshold voltage of the MAX825SEXK-T?
The MAX825SEXK-T has a factory-trimmed reset threshold of 2.93V, specified as 2.85V (min) to 3.00V (max) over the full -40°C to +85°C temperature range. This value is confirmed in the Reset Threshold Table and Electrical Characteristics section of the official datasheet, and applies exclusively to the "S" suffix variant in SC70 packaging.
Does the MAX825SEXK-T include a watchdog timer function?
No, the MAX825SEXK-T does not include a watchdog timer. Per the Selector Guide and Pin Description, only MAX823 and MAX824 variants feature WDI functionality. The MAX825SEXK-T provides manual reset input (MR) and complementary active-low/active-high reset outputs, but no watchdog monitoring circuitry - making it distinct from MAX823/MAX824 in functional scope.
What is the supply current of the MAX825SEXK-T and under what conditions is it measured?
The MAX825SEXK-T draws 2µA typical supply current, measured in SC70 package at TA = +25°C with MR unconnected and VCC = 3.3V. This value is explicitly listed in the Electrical Characteristics table for MAX825T/S/R/Z/Y devices in SC70, and is validated across the full operating temperature range (-40°C to +85°C) with no external loading.
Can the MAX825SEXK-T operate reliably when VCC drops below 2.0V?
Yes, the MAX825SEXK-T guarantees correct RESET output state down to VCC = 1V, as stated in the General Description and Electrical Characteristics. Its internal circuitry remains functional and asserts valid reset signals even during deep brownout conditions, supporting safe shutdown in battery-fail or backup-power scenarios where VCC may fall to 1.2V or lower.
What package type and pin count does the MAX825SEXK-T use?
The MAX825SEXK-T uses a 5-pin SC70-5 package (JEDEC MO-203AA), confirmed in the Ordering Information table and Pin Configurations diagram. It is not offered in SOT23-5 for the "S" suffix; the "EXK-T" designation specifically denotes SC70-5 with -40°C to +85°C temperature grade and lead-free finish.
MAX825SEXK-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:
- 2.93V
- 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
MAX825SEXK-T FAQ
1.How can I place an order for MAX825SEXK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX825SEXK-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 MAX825SEXK-T reliable?
The price and inventory of MAX825SEXK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX825SEXK-T is usually 5 days.
3.What payment methods are accepted for MAX825SEXK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX825SEXK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX825SEXK-T?
MAX825SEXK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX825SEXK-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 MAX825SEXK-T?
For technical support, including MAX825SEXK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX825SEXK-T requirements.
6.How does Aetrix verify that MAX825SEXK-T is sourced from the original manufacturer or authorized distributors?
All MAX825SEXK-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 MAX825SEXK-T meets industry standards.
7.What is the process for return or replacement of MAX825SEXK-T?
All MAX825SEXK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX825SEXK-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 MAX825SEXK-T part is unused and in its original packaging.
Return procedure for MAX825SEXK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX825SEXK-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…
