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Analog Devices Inc./Maxim Integrated MAX708TEUA+T
- Part No.:
- MAX708TEUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX708TEUA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,022
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Product details
Overview
MAX708TEUA+T from Maxim Integrated is a +3V microprocessor supervisory circuit with dual active-high and active-low reset outputs, 3.08V reset threshold, 200ms reset pulse width, 100µA quiescent current, and integrated power-fail comparator (1.25V reference). It monitors VCC in battery-powered portable instruments and embedded controllers to ensure reliable µP startup and brownout recovery.
For engineers reviewing the MAX708TEUA+T datasheet, MAX708TEUA+T pinout, MAX708TEUA+T application, or MAX708TEUA+T equivalent, this device delivers verified dual-reset signaling, precise 3.08V supply monitoring, and PFI/PFO-based power-fail warning - critical for low-voltage system integrity and orderly shutdown in space-constrained designs.
Technical Context
The MAX708TEUA+T implements a precision voltage monitor with guaranteed RESET assertion down to VCC = 1V, a dedicated 1.25V internal reference for the PFI comparator, and independent timing logic for reset generation and manual reset debouncing. Its dual RESET/RESET outputs eliminate external inverters in systems requiring both signal polarities.
No watchdog timer is present - unlike MAX706 variants - simplifying timing-critical applications where watchdog supervision is unnecessary. The 200ms reset delay is internally generated and temperature-stable across –40°C to +85°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reset assertion before 3.3V µP brownout |
| Reset Pulse Width | 200ms (typical); provides sufficient time for µP initialization and peripheral stabilization |
| Supply Current | 100µA (max at VCC < 3.6V); enables long battery life in portable equipment |
| Power-Fail Threshold | 1.25V (internal reference); supports configurable PFI divider for early-warning detection |
| Operating Temperature | –40°C to +85°C; qualified for industrial and extended-temperature embedded use |
| Package | 8-pin µMAX (U8-1); 3mm × 3mm surface-mount footprint for high-density PCBs |
| VCC Range | 1.2V to 5.5V; guarantees functional reset output even during deep undervoltage conditions |
Pinout & Package
MAX708TEUA+T is housed in an 8-pin µMAX package (U8-1), measuring 3mm × 3mm with 0.65mm lead pitch, optimized for space-constrained portable and industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-Low Manual Reset Input | TTL/CMOS-compatible; 500ns minimum pulse width at VCC=3V; internally pulled up with ~70µA source |
| 2 (VCC) | Positive Supply Input | Accepts 1.2V–5.5V; reset guaranteed asserted down to VCC = 1V |
| 3 (GND) | Ground Reference | Common return for all internal circuits and output drivers |
| 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; used for µP interrupt or MR-triggered reset initiation |
| 6 (RESET) | Active-High Reset Output | Asserted high during power-up/brownout; deasserts 200ms after VCC exceeds 3.08V |
| 7 (RESET) | Active-Low Reset Output | Complementary to RESET; enables direct connection to µP reset pins requiring active-low assertion |
| 8 (NC) | No Connection | Not internally bonded; must be left floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual Reset Outputs | Simultaneous active-high RESET and active-low RESET eliminate need for external level-shifting or inversion |
| Precision 3.08V Threshold | ±1.5% accuracy over temperature; matches 3.3V µP supply tolerance for robust brownout detection |
| Guaranteed Reset at Low VCC | RESET/RESET asserted down to VCC = 1V; ensures deterministic behavior during deep discharge or slow power ramp |
| Low-Power Operation | 100µA max supply current enables >1-year battery life in always-on monitoring applications |
| Configurable Power-Fail Warning | 1.25V internal reference + PFI/PFO pair allows user-defined trip point for unregulated rail monitoring |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers with Dual-Reset µPs |
|---|---|
Use Scenario: Handheld multimeter powered by single 3.3V Li-ion cell with AC adapter backup. IC Role / Device Role / Timing Role: Monitors main VCC and asserts both RESET and RESET on brownout; uses PFI to detect unregulated DC input drop prior to regulator failure. Use Value: Enables graceful firmware save and display shutdown before power collapse, extending usable battery range by preventing erratic µP execution. |
Use Scenario: PLC I/O module requiring simultaneous reset signaling to ARM Cortex-M4 (active-low) and FPGA (active-high). IC Role / Device Role / Timing Role: Provides synchronized 200ms reset pulse on both outputs during cold start and brownout recovery. Use Value: Eliminates external logic gates and reduces BOM count while guaranteeing deterministic power-on sequencing across heterogeneous silicon. |
| Medical Point-of-Care Devices | Smart Energy Meters with Backup Supercap |
Use Scenario: Portable ECG monitor with real-time data logging and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Supervises 3.3V rail from coin-cell + boost converter; triggers PFO interrupt to initiate flash write completion before power loss. Use Value: Prevents data corruption during unexpected battery depletion by enabling last-chance nonvolatile storage within 200ms window. |
Use Scenario: Electricity meter using supercapacitor hold-up during mains outage to complete billing cycle write. IC Role / Device Role / Timing Role: Detects VCC sag below 3.08V and asserts RESET/RESET; PFI monitors supercap voltage to pre-empt hold-up exhaustion. Use Value: Delivers dual-layer power-fail response: immediate µP reset + predictive supercap voltage warning for safe EEPROM commit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708SEUA+T | 2.93V reset threshold; otherwise identical pinout, features, and timing | Suitable for 3.0V nominal systems where tighter margin vs. 3.3V rail is required | Select when system VCC nominal is 3.0V and brownout must trigger earlier than 3.08V |
| MAX708REUA+T | 2.63V reset threshold; same dual-reset architecture and µMAX package | Optimized for legacy 2.7V–3.0V µP platforms or systems with higher supply tolerance | Choose for compatibility with older 2.7V logic families or where deeper undervoltage margin is needed |
Compared with MAX708TEUA+T, the MAX708SEUA+T offers earlier reset assertion for 3.0V-centric designs, while MAX708REUA+T supports broader undervoltage headroom - all retain identical dual-output functionality, PFI/PFO capability, and 200ms timing, enabling direct substitution with only threshold adjustment.
Availability
MAX708TEUA+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controllers, medical diagnostics devices, and smart energy meters requiring stable component supply across extended temperature ranges.
Supply support for MAX708TEUA+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.
The MAX708 series belongs to Maxim's microprocessor supervisory product line, designed specifically to replace discrete reset solutions in space- and power-constrained embedded systems requiring precise, low-voltage supply monitoring and dual-polarity reset signaling.
FAQ
What is the reset threshold voltage for MAX708TEUA+T?
The MAX708TEUA+T has a factory-trimmed reset threshold of 3.08V (VCC falling), with ±1.5% accuracy over temperature. This value is fixed for the 'T' suffix variant and ensures reliable reset assertion before standard 3.3V µP brownout conditions occur. The threshold hysteresis is 20mV, preventing chatter near the trip point.
Does MAX708TEUA+T include a watchdog timer function?
No, the MAX708TEUA+T does not include a watchdog timer. Unlike the MAX706 family, the MAX708 series replaces the WDI/WDO pins with dual RESET/RESET outputs. The MAX708TEUA+T provides only power-supply monitoring, manual reset, and power-fail warning functions - making it ideal for applications where watchdog supervision is unnecessary or handled separately.
What package type is used for MAX708TEUA+T?
The MAX708TEUA+T is supplied in an 8-pin µMAX package (package code U8-1), measuring 3mm × 3mm with 0.65mm lead pitch. This leaded surface-mount package is RoHS-compliant and designed for high-density PCB layouts in portable and industrial equipment where board space is constrained.
How does the power-fail comparator work in MAX708TEUA+T?
The MAX708TEUA+T includes a dedicated power-fail comparator with a fixed 1.25V internal reference. The PFI pin accepts a divided voltage from an external rail (e.g., unregulated DC input), and when PFI falls below 1.25V, the open-drain PFO output pulls low. This enables early-warning detection of supply degradation before the main VCC drops below the 3.08V reset threshold.
Can MAX708TEUA+T operate with supply voltages below 3.0V?
Yes, the MAX708TEUA+T operates from VCC = 1.2V to 5.5V and guarantees RESET/RESET assertion down to VCC = 1V. Its internal circuitry remains functional at low voltages, and the 3.08V reset threshold is referenced to VCC - ensuring accurate monitoring even during slow power ramps or deep battery discharge in 3.3V systems.
MAX708TEUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-uMAX/uSOP
MAX708TEUA+T FAQ
1.How can I place an order for MAX708TEUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX708TEUA+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 MAX708TEUA+T reliable?
The price and inventory of MAX708TEUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX708TEUA+T is usually 5 days.
3.What payment methods are accepted for MAX708TEUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX708TEUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX708TEUA+T?
MAX708TEUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX708TEUA+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 MAX708TEUA+T?
For technical support, including MAX708TEUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX708TEUA+T requirements.
6.How does Aetrix verify that MAX708TEUA+T is sourced from the original manufacturer or authorized distributors?
All MAX708TEUA+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 MAX708TEUA+T meets industry standards.
7.What is the process for return or replacement of MAX708TEUA+T?
All MAX708TEUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX708TEUA+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 MAX708TEUA+T part is unused and in its original packaging.
Return procedure for MAX708TEUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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