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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 MPU
- Quantity:
- Payment:
- Shipping:
Inventory:538
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Product details
Overview
MAX708TESA from Maxim Integrated is a +3V microprocessor supervisory circuit with dual active-high and active-low reset outputs, 2.93V reset threshold, 200ms reset pulse width, 100µA quiescent current, and power-fail comparator (1.25V threshold). It monitors VCC in battery-powered portable instruments and embedded controllers to ensure reliable µP startup and brownout recovery.
For engineers reviewing the MAX708TESA datasheet, MAX708TESA pinout, MAX708TESA application, or MAX708TESA equivalent, key selection criteria include dual-reset polarity support, guaranteed RESET assertion down to VCC = 1V, absence of watchdog timer (distinguishing it from MAX706 series), SO-8 package compatibility, and operation across –40°C to +85°C industrial temperature range.
Technical Context
The MAX708TESA implements a precision voltage monitor with hysteresis (20mV) and a dedicated 1.25V reference for PFI-based power-fail or low-battery detection. Its dual-reset architecture provides simultaneous RESET (active-high) and RESET (active-low) signals, eliminating need for external inverters in mixed-logic systems.
Unlike the MAX706/706A family, the MAX708 series omits the watchdog timer and WDI/WDO pins, simplifying design where system-level supervision suffices without runtime activity monitoring. The device asserts reset during power-up, power-down, and brownout conditions, with internal timing guaranteeing 200ms minimum pulse width after VCC exceeds threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (VCC falling); ensures reliable reset assertion before 3.3V µP supply drops below operational minimum |
| Reset Pulse Width | 200ms typical; guarantees sufficient duration for µP initialization and peripheral stabilization |
| Supply Current | 100µA max at VCC < 3.6V; enables long battery life in portable equipment |
| Operating Temp | –40°C to +85°C; qualified for industrial and automotive-adjacent embedded applications |
| PFI Threshold | 1.25V ±5%; supports accurate power-fail warning or secondary supply monitoring via resistive divider |
| RESET Assertion | Guaranteed to VCC = 1V; maintains valid logic state during deep brownout or soft power-down |
| Package | 8-pin SO (S8-2); surface-mount compatible with standard reflow profiles and IPC-7351B footprints |
Pinout & Package
MAX708TESA 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 1 is marked by notch or dot; device is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; internal 70µA pullup enables pushbutton use without external resistor |
| 2 VCC | Positive supply input | Accepts 1.2V to 5.5V; powers all internal comparators and reset generator |
| 3 GND | Ground reference | Common return for all analog and digital functions; must be low-impedance connection |
| 4 PFI | Power-fail comparator input | Monitors external voltage via resistive divider; triggers PFO when input falls below 1.25V |
| 5 PFO | Active-low power-fail output | Sinks current when PFI < 1.25V; can drive MR or µP interrupt line directly |
| 6 RESET | Active-low reset output | Asserted low during power-up/brownout; deasserts 200ms after VCC > 2.93V |
| 7 RESET | Active-high reset output | Complementary to pin 6; asserted high during fault; eliminates need for external inverter |
| 8 NC | No connection | Not internally bonded; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual-reset polarity outputs | Simultaneous active-high (RESET) and active-low (RESET) signals simplify interface with mixed-logic µPs and FPGAs |
| Guaranteed reset to VCC = 1V | Ensures deterministic behavior during severe brownout or controlled power-down sequences |
| 1.25V precision PFI reference | Enables accurate power-fail warning, low-battery detection, or auxiliary supply monitoring without external reference |
| 200ms reset time delay | Meets µP reset timing requirements for most 8/16-bit microcontrollers and ASICs without external RC network |
| 100µA quiescent current | Minimizes standby power draw in battery-backed systems such as portable medical devices and handheld test gear |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers |
|---|---|
Use Scenario: Handheld multimeter powered by single Li-ion cell with optional AC adapter. IC Role / Device Role / Timing Role: Supervises 3.3V regulated rail; asserts dual reset on battery sag or adapter disconnect. Use Value: Prevents firmware corruption during transition between power sources and ensures clean µP restart after low-voltage events. |
Use Scenario: PLC I/O module operating in factory environment with noisy 24V DC supply. IC Role / Device Role / Timing Role: Monitors local 3.3V logic supply; generates synchronized reset pulses for µP and FPGA configuration logic. Use Value: Eliminates need for discrete reset ICs and level translators, reducing BOM count and board area. |
| Computers & Embedded Systems | Critical µP Power Monitoring |
Use Scenario: Low-power edge node running real-time OS with flash memory and sensor interface. IC Role / Device Role / Timing Role: Provides fail-safe reset during cold start and brownout; PFO monitors backup coin-cell voltage. Use Value: Enables graceful shutdown and data retention via PFO-triggered MR pulse before main supply collapse. |
Use Scenario: Medical diagnostic device requiring IEC 62304 compliance and deterministic power sequencing. IC Role / Device Role / Timing Role: Primary supervisor for ARM Cortex-M4 core; guarantees reset assertion until VCC stabilizes above 2.93V. Use Value: Meets safety-critical timing requirements with 200ms min pulse width and 20mV hysteresis to prevent chatter. |
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 function, same 2.93V threshold, same SO-8 package, but rated for –40°C to +85°C with different temp grade marking (E vs T) | No functional difference; MAX708TESA is identical in electrical specs and pinout | Select MAX708TESA for traceability to specific temperature-grade ordering code per Maxim's published table |
| TPS3808G18DBVR | Single active-low reset, 1.8V threshold, 200ms delay, 1.5µA IQ, SOT-23-5 package | Lacks dual-reset outputs and PFI/PFO functionality; not suitable for power-fail warning or mixed-logic interfacing | Choose only if system requires ultra-low IQ and single-reset polarity in space-constrained layout |
Compared with MAX708RESA, MAX708TESA offers identical performance and form factor but reflects Maxim's updated temperature-grade designation; versus TPS3808G18DBVR, MAX708TESA delivers critical dual-reset capability and integrated power-fail monitoring essential for robust embedded supervision.
Availability
MAX708TESA is available at Aetrix Electronics and suitable for battery-powered equipment, industrial controllers, embedded computers, and critical µP power monitoring 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, sensing, connectivity, and security applications in industrial, medical, and communications markets.
The MAX708 family was engineered specifically for cost-sensitive, space-constrained µP systems needing reliable power-on reset, brownout protection, and auxiliary voltage monitoring - without watchdog complexity.
FAQ
What is the reset threshold voltage for MAX708TESA?
The MAX708TESA has a nominal reset threshold of 2.93V (VCC falling), with ±1.5% tolerance over temperature. This value is factory-trimmed and guaranteed across the full –40°C to +85°C operating range. The device asserts both RESET and RESET outputs when VCC drops below this threshold and holds them asserted until VCC rises above 2.93V plus 20mV hysteresis, ensuring noise immunity during recovery.
Does MAX708TESA include a watchdog timer function?
No, MAX708TESA does not include a watchdog timer. Unlike the MAX706/706A series, the MAX708 family omits the WDI and WDO pins entirely. MAX708TESA provides only power-supply monitoring, manual reset, and power-fail comparator functions. If watchdog supervision is required, consider MAX706TESA or MAX706ATESA instead.
What is the purpose of the PFI and PFO pins on MAX708TESA?
PFI (Pin 4) is the input to a precision 1.25V comparator used for power-fail warning, low-battery detection, or monitoring auxiliary supplies. PFO (Pin 5) is its active-low open-drain output. When PFI voltage falls below 1.25V, PFO pulls low - enabling direct connection to MR for cascaded reset or to a µP interrupt line for early-warning shutdown handling.
Can MAX708TESA operate with a 3.3V supply?
Yes, MAX708TESA is fully specified for operation with 3.3V supplies. Its supply voltage range is 1.2V to 5.5V, and all electrical characteristics - including reset threshold accuracy, PFO drive strength, and MR input compatibility - are guaranteed at VCC = 3.3V. The 2.93V reset threshold ensures reliable supervision of standard 3.3V logic rails.
What package type is used for MAX708TESA?
MAX708TESA is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package, package code S8-2, with 1.27mm lead pitch and 3.9mm × 4.9mm body dimensions. It is lead-free, RoHS-compliant, and compatible with standard surface-mount assembly processes including reflow soldering per J-STD-020.
MAX708TESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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:
- 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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