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Analog Devices Inc./Maxim Integrated MAX708TESA+
- Part No.:
- MAX708TESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX708TESA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:537
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Product details
Overview
MAX708TESA+ 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 threshold comparator - used in battery-powered instruments and industrial controllers to ensure reliable µP startup and brownout recovery.
For engineers reviewing the MAX708TESA+ datasheet, MAX708TESA+ pinout, MAX708TESA+ application, or MAX708TESA+ equivalent, this page delivers verified functional identity, exact reset threshold (2.93V), guaranteed RESET assertion down to VCC = 1V, dual-reset output behavior, and confirmed SO-8 package mapping - all critical for embedded power-monitoring design validation.
Technical Context
The MAX708TESA+ integrates a precision voltage detector with hysteresis (20mV), a reset timer with fixed 200ms delay, and an independent power-fail comparator referenced to 1.25V. It asserts both RESET (active-high) and RESET (active-low) simultaneously when VCC falls below 2.93V or MR is pulled low.
Unlike MAX706 variants, the MAX708 series omits the watchdog timer but adds dual complementary reset outputs. Its manual reset input (MR) is TTL/CMOS-compatible with 500ns minimum pulse width at VCC = 3V and includes internal 70µA pull-up current - enabling direct pushbutton interfacing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (VCC falling); ensures reliable reset assertion before µP supply dropout in +3.3V systems |
| Reset Pulse Width | 200ms typical; guarantees sufficient time for µP initialization and peripheral stabilization |
| Supply Voltage Range | 1.2V to 5.5V; supports operation down to VCC = 1V with guaranteed RESET assertion |
| Quiescent Current | 100µA max at VCC < 3.6V; enables long battery life in portable instrumentation |
| Power-Fail Threshold | 1.25V internal reference; allows configurable early-warning detection of unregulated supply collapse |
| Output Drive | RESET sinks 1.2mA @ 0.3V; RESET sources 500µA @ 0.8×VCC - compatible with standard CMOS/TTL inputs |
| Operating Temperature | -40°C to +85°C; qualified for industrial and automotive-adjacent embedded environments |
Pinout & Package
MAX708TESA+ is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount, lead-free compliant, with 1.27mm pitch and JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with 70µA; debounced by 200ms reset timer |
| 2 VCC | Positive supply input | Accepts 1.2V–5.5V; reset guaranteed active down to VCC = 1V |
| 3 GND | Ground reference | Common return for all internal comparators and outputs |
| 4 PFI | Power-fail comparator input | Monitors external voltage divider; triggers PFO when input falls below 1.25V |
| 5 PFO | Active-low power-fail output | Open-drain output; sinks current when PFI < 1.25V - used for µP interrupt or MR triggering |
| 6 RESET | Active-low reset output | Complementary to RESET; asserted low during power-up, brownout, or MR activation |
| 7 RESET | Active-high reset output | Asserted high during fault conditions; deasserts 200ms after VCC exceeds 2.93V |
| 8 N.C. | 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 RESET (active-high) and RESET (active-low) eliminate need for external inverters in mixed-logic systems |
| Precision 2.93V reset threshold | ±1.5% tolerance over temperature; matches +3.3V µP supply requirements without external resistor networks |
| Guaranteed reset at VCC = 1V | Ensures deterministic behavior during deep brownout - critical for fail-safe data retention in flash memory systems |
| 1.25V power-fail comparator | Enables early-warning detection of unregulated rail collapse (e.g., battery sag or DC-DC pre-regulator failure) |
| Debounced manual reset | Internal timing eliminates need for RC filter; 500ns MR pulse width supports fast digital reset signaling |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous field data acquisition powered by Li-ion battery with variable discharge profile. IC Role / Device Role / Timing Role: Monitors main +3.3V rail and triggers dual-reset signals to hold µC in known state during voltage sag below 2.93V. Use Value: Prevents corrupted EEPROM writes and spurious UART transmissions during brownout by enforcing 200ms reset hold time and asserting both logic polarities. |
Use Scenario: DIN-rail mounted controller with isolated +3.3V and +24V supplies powering FPGA and analog front-end. IC Role / Device Role / Timing Role: Uses PFI to monitor unregulated +24V-derived rail via resistive divider; asserts PFO to interrupt µP before regulator dropout. Use Value: Enables graceful shutdown sequence and nonvolatile register save prior to complete power loss - leveraging 1.25V comparator accuracy and hysteresis. |
| Medical Handheld Diagnostics | Smart Energy Meters |
|
Use Scenario: Portable glucose analyzer with USB charging and battery backup; requires fail-safe boot under varying input conditions. IC Role / Device Role / Timing Role: Provides simultaneous active-high and active-low reset to interface with both ARM Cortex-M0 core and legacy ASIC peripherals. Use Value: Eliminates level-shifting components while guaranteeing synchronized reset across mixed-voltage subsystems during cold-start or battery swap. |
Use Scenario: Revenue-grade meter with tamper-detection circuitry and real-time clock backed by supercapacitor. IC Role / Device Role / Timing Role: Monitors +3.3V RTC supply and asserts RESET on brownout; PFO connected to MR to initiate controlled clock-save routine. Use Value: Ensures accurate timekeeping continuity and secure metering data integrity during grid fluctuations - validated over -40°C to +85°C range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708RESA+ | Same functionality and pinout; identical 2.93V threshold and SO-8 package; differs only in temperature grade (–40°C to +85°C same as MAX708TESA+) | No functional difference; both rated for industrial temperature range | Select MAX708TESA+ for traceable sourcing and Aetrix's volume procurement support; MAX708RESA+ may have alternate distribution channel availability |
| TPS3808G33DBVR | Single active-low reset output; 3.3V threshold (±0.5%); 200ms delay; lower quiescent current (1.8µA); no PFO/PFI comparator | Lacks power-fail warning capability and dual-reset outputs - unsuitable where early-warning or mixed-logic reset is required | Choose only if system uses only active-low reset and does not require brownout pre-warning or complementary outputs |
Compared with MAX708RESA+, MAX708TESA+ offers identical electrical and thermal performance but distinct orderable part marking for supply-chain traceability; versus TPS3808G33DBVR, MAX708TESA+ provides essential dual-reset polarity and integrated power-fail detection - critical for safety-critical and battery-backed applications.
Availability
MAX708TESA+ is available at Aetrix Electronics and suitable for battery-powered equipment, industrial controllers, and medical handheld devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX708TESA+ 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 power management, sensing, and interface applications in industrial, medical, and communications systems.
The MAX708 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for robust, low-cost power monitoring and reset generation in +3V/+3.3V embedded systems with demanding reliability requirements.
FAQ
What is the exact reset threshold voltage for MAX708TESA+?
The MAX708TESA+ has a precisely trimmed reset threshold of 2.93V (typical) with ±1.5% tolerance over temperature. This value applies to VCC falling conditions and is specified in the Electrical Characteristics table for the 'S' suffix variant. The threshold is factory-laser-trimmed and guaranteed across the full –40°C to +85°C operating range. MAX708TESA+ uses the same 2.93V threshold as MAX708S and MAX706S families.
Does MAX708TESA+ include a watchdog timer function?
No, MAX708TESA+ does not include a watchdog timer. Unlike the MAX706 series, the MAX708 family replaces the watchdog input (WDI) and watchdog output (WDO) with dual reset outputs (RESET and RESET). Pin 6 is RESET (active-low) and pin 7 is RESET (active-high); pin 6 on MAX706 variants is WDO. This architectural difference is explicitly stated in the General Description and Pin Description sections of the datasheet.
What package type and footprint does MAX708TESA+ use?
MAX708TESA+ is supplied in an 8-pin SO (Small Outline) package with JEDEC MS-012AC outline, 1.27mm lead pitch, and S8-2 package code. It is surface-mount, lead-free, and RoHS-compliant. The pin configuration matches standard SO-8 footprints used for microprocessor supervisors, and the device is fully compatible with reflow soldering processes per J-STD-020.
Can MAX708TESA+ monitor a power supply other than VCC?
Yes, MAX708TESA+ can monitor secondary supplies using its PFI (Power-Fail Input) pin. The internal 1.25V comparator reference allows external resistive dividers to set custom trip points - for example, detecting collapse of a +12V rail or negative supply. The PFO output asserts low when PFI falls below 1.25V, and the comparator includes 10mV hysteresis to prevent chatter near the threshold.
Is MAX708TESA+ pin-compatible with other MAX708 variants like MAX708RCSA+ or MAX708TEUA+?
Yes, all MAX708 variants - including MAX708TESA+, MAX708RCSA+, and MAX708TEUA+ - share identical pinout, function mapping, and electrical behavior across package types (SO, µMAX, PDIP). Differences are limited to reset threshold (R=2.63V, S=2.93V, T=3.08V), temperature grade (C=0°C to +70°C, E=–40°C to +85°C, M=–55°C to +125°C), and package (SA=SO, UA=µMAX, PA=PDIP). MAX708TESA+ is the –40°C to +85°C, SO-8, 2.93V version.
MAX708TESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX708TESA+ FAQ
1.How can I place an order for MAX708TESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX708TESA+ 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 MAX708TESA+ reliable?
The price and inventory of MAX708TESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX708TESA+ is usually 5 days.
3.What payment methods are accepted for MAX708TESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX708TESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX708TESA+?
MAX708TESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX708TESA+ 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 MAX708TESA+?
For technical support, including MAX708TESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX708TESA+ requirements.
6.How does Aetrix verify that MAX708TESA+ is sourced from the original manufacturer or authorized distributors?
All MAX708TESA+ 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 MAX708TESA+ meets industry standards.
7.What is the process for return or replacement of MAX708TESA+?
All MAX708TESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX708TESA+, 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 MAX708TESA+ part is unused and in its original packaging.
Return procedure for MAX708TESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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