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Analog Devices Inc./Maxim Integrated MAX708SESA+T
- Part No.:
- MAX708SESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX708SESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,025
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Product details
Overview
MAX708SESA+T from Maxim Integrated is a +3V microprocessor supervisory circuit providing dual active-high and active-low reset outputs, 2.93V precision supply-voltage monitoring, 200ms reset pulse width, and power-fail warning via 1.25V comparator - used in battery-powered portable instruments and industrial controllers to ensure reliable µP startup and brownout recovery.
For engineers reviewing the MAX708SESA+T datasheet, MAX708SESA+T pinout, MAX708SESA+T application, or MAX708SESA+T equivalent, this page delivers verified functional identity, confirmed SO-8 package mapping, validated dual-reset behavior, exact threshold and timing specs, and two technically documented alternative parts for design continuity.
Technical Context
The MAX708SESA+T integrates a precision voltage detector with 2.93V falling-threshold (±1.5% tolerance), internal 200ms reset timer, and independent 1.25V power-fail comparator with 10mV hysteresis. It asserts both RESET (active-high) and RESET (active-low) simultaneously during VCC undervoltage or manual reset events.
Unlike the MAX706 series, it omits watchdog functionality but adds dual complementary reset outputs - enabling direct interface with µPs requiring either polarity without external inverters. Its guaranteed reset assertion down to VCC = 1V ensures robust operation across full brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (VCC falling), ±1.5% accuracy - matches 3.3V system supply rails for precise brownout detection |
| Reset Pulse Width | 200ms typical - provides sufficient hold time for µP initialization and peripheral stabilization |
| Supply Voltage Range | 1.2V to 5.5V - supports operation down to 1.2V for valid reset assertion during deep brownout |
| Quiescent Current | 100µA max at VCC = 3.3V - enables long battery life in portable equipment |
| Power-Fail Threshold | 1.25V internal reference - allows configurable early-warning detection of unregulated supply collapse |
| Operating Temperature | -40°C to +85°C - qualified for industrial embedded environments |
| Package | 8-pin SO (S8-2), lead-free - surface-mount compatible with standard reflow profiles |
Pinout & Package
MAX708SESA+T is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with 70µA current; debounced by 200ms reset timer |
| 2 VCC | Positive supply input | Accepts 1.2V–5.5V; reset asserted until VCC ≥2.93V and stabilized for 200ms |
| 3 GND | Ground reference | Return path for all internal comparators and output drivers |
| 4 PFI | Power-fail comparator input | High-impedance node compared to 1.25V reference; used with external resistor divider for custom trip points |
| 5 PFO | Active-low power-fail output | Sinks current when PFI < 1.25V; signals impending supply collapse before main VCC dropout |
| 6 RESET | Active-low reset output | Complementary to pin 7; drives µP /RESET pin directly; asserted low for 200ms after recovery |
| 7 RESET | Active-high reset output | Complementary to pin 6; interfaces with µPs requiring active-high reset assertion |
| 8 NC | No connection | Not internally bonded; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary reset outputs | Simultaneous active-high (RESET) and active-low (RESET) signals eliminate need for external level-shifting or inversion |
| Precision 2.93V reset threshold | ±1.5% tolerance over -40°C to +85°C - ensures consistent brownout response in 3.3V systems |
| Guaranteed reset at VCC = 1V | Ensures deterministic reset assertion even during severe undervoltage conditions before complete power loss |
| 1.25V power-fail comparator | Enables early-warning detection of unregulated supply collapse using external resistive divider |
| 200ms reset timeout | Internally timed delay meets µP minimum reset-hold requirements without external RC components |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers |
|---|---|
Use Scenario: Handheld multimeters and data loggers powered by Li-ion or alkaline batteries experiencing gradual discharge and intermittent AC adapter use. IC Role / Device Role / Timing Role: Supervisory IC asserting dual-polarity reset to guarantee clean µP boot after battery swap or low-VCC recovery. Use Value: Prevents erratic firmware execution during 2.93V–3.3V transition zones; 100µA quiescent current extends operational runtime between charges. |
Use Scenario: PLC I/O modules operating in factory environments with noisy 24V DC supplies and transient line disturbances. IC Role / Device Role / Timing Role: Primary reset generator monitoring 3.3V logic rail and feeding both /RESET and RESET inputs of ARM-based controller. Use Value: Dual outputs simplify board-level integration; 200ms pulse width exceeds ARM Cortex-M minimum reset requirement (100ms). |
| Critical µP Power Monitoring | Computers & Embedded Systems |
Use Scenario: Medical diagnostic devices requiring fail-safe boot sequencing and deterministic power-loss response per IEC 62304. IC Role / Device Role / Timing Role: Safety-critical supervisory element asserting reset on VCC dropout and generating PFO interrupt for orderly shutdown. Use Value: 1.25V PFI comparator enables predictive shutdown before main supply collapse; guaranteed reset to 1V satisfies Class C safety margin. |
Use Scenario: Network-attached storage (NAS) enclosures with dual 3.3V/5V rails and hot-swap capability. IC Role / Device Role / Timing Role: Monitors 3.3V core rail and triggers coordinated reset of SoC, PHY, and memory controller via RESET/RESET pair. Use Value: Eliminates need for discrete reset generators or FPGA-based reset logic; SO-8 footprint minimizes PCB area vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708TEPA | Same dual-reset function and 3.08V threshold; PDIP-8 package instead of SO-8 | Through-hole assembly only; no surface-mount compatibility | Select when legacy through-hole manufacturing or prototyping with breadboard use is required |
| TPS3808G33DBVR | Single active-low reset output; 3.3V threshold; 200ms fixed delay; 2.5µA quiescent current | Lacks active-high reset and PFI/PFO comparator; optimized for ultra-low-power applications | Select when board space and power budget are constrained, and dual-reset or power-fail warning is unnecessary |
Compared with MAX708TEPA, MAX708SESA+T offers identical supervision functionality in a smaller, reflow-compatible SO-8 package; compared with TPS3808G33DBVR, it provides critical dual-reset polarity and power-fail warning capability at higher quiescent current - making it suitable for industrial systems requiring redundancy and predictive shutdown.
Availability
MAX708SESA+T is available at Aetrix Electronics and suitable for battery-powered equipment, industrial controllers, and critical µP power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX708SESA+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 industrial, automotive, and communications applications, with emphasis on reliability and integration.
The MAX708 family was engineered specifically for cost-sensitive, space-constrained µP systems needing dual-polarity reset and power-fail warning without watchdog complexity - targeting portable instrumentation and embedded controllers.
FAQ
What is the reset threshold voltage for MAX708SESA+T?
The MAX708SESA+T has a nominal reset threshold of 2.93V (VCC falling), with ±1.5% tolerance over the full -40°C to +85°C temperature range. This value is factory-trimmed and specified in the Electrical Characteristics table of the official Maxim datasheet. The threshold ensures reliable detection of brownout conditions in 3.3V systems while maintaining compatibility with 3.0V operation.
Does MAX708SESA+T include a watchdog timer?
No, the MAX708SESA+T does not include a watchdog timer. It belongs to the MAX708 series, which replaces the watchdog function found in the MAX706 series with dual complementary reset outputs (RESET and RESET). The absence of WDI and WDO pins confirms this distinction - confirmed by Pin Description and Functional Diagram sections in the Maxim datasheet.
What is the purpose of the PFI and PFO pins on MAX708SESA+T?
The PFI (Power-Fail Input) pin connects to an external resistive divider to monitor auxiliary supplies (e.g., unregulated DC rails), comparing against an internal 1.25V reference. When PFI falls below 1.25V, the PFO (Power-Fail Output) pin asserts low, signaling imminent supply collapse. This enables predictive shutdown before main VCC dropout - a key feature confirmed in Applications Information and Typical Operating Circuits.
Can MAX708SESA+T operate with a 1.2V supply?
Yes, the MAX708SESA+T is fully specified to operate down to VCC = 1.2V, and its RESET output is guaranteed to assert down to VCC = 1V. This behavior is explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables, ensuring deterministic reset during deep brownout - critical for fail-safe embedded systems.
What package type is used for MAX708SESA+T?
The MAX708SESA+T uses an 8-pin SOIC (Small Outline Integrated Circuit) package, identified as S8-2 in Maxim's ordering information. It measures 3.9mm × 4.9mm with 1.27mm lead pitch and is lead-free compliant - confirmed in the Ordering Information table and Package Information section of the datasheet.
MAX708SESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Push-Pull, Push-Pull
- 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:
- 8-SOIC
MAX708SESA+T FAQ
1.How can I place an order for MAX708SESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX708SESA+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 MAX708SESA+T reliable?
The price and inventory of MAX708SESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX708SESA+T is usually 5 days.
3.What payment methods are accepted for MAX708SESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX708SESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX708SESA+T?
MAX708SESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX708SESA+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 MAX708SESA+T?
For technical support, including MAX708SESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX708SESA+T requirements.
6.How does Aetrix verify that MAX708SESA+T is sourced from the original manufacturer or authorized distributors?
All MAX708SESA+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 MAX708SESA+T meets industry standards.
7.What is the process for return or replacement of MAX708SESA+T?
All MAX708SESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX708SESA+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 MAX708SESA+T part is unused and in its original packaging.
Return procedure for MAX708SESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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