My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX708TEUA
- Part No.:
- MAX708TEUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX708TEUA.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:4,479
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX708TEUA from Maxim Integrated is a precision +3V microprocessor supervisory circuit in an 8-pin µMAX package, providing dual active-high and active-low reset outputs, 3.08V reset threshold, 200ms reset pulse width, and 1.25V power-fail comparator input - used for reliable power-up sequencing and brownout protection in battery-powered embedded controllers.
For engineers reviewing the MAX708TEUA datasheet, MAX708TEUA pinout, MAX708TEUA application, or MAX708TEUA equivalent, this device serves as a dual-reset supervisor with guaranteed RESET assertion down to VCC = 1V, low-quiescent-current operation (100µA), and integrated manual reset debouncing - critical for portable instrumentation and industrial microcontroller systems requiring deterministic reset behavior under voltage transients.
Technical Context
The MAX708TEUA implements a dual-output reset generator with independent internal timing for both RESET (active-high) and RESET (active-low), each asserted for 200ms after VCC exceeds the 3.08V threshold or MR is pulsed. Its power-fail comparator uses a precise 1.25V internal reference with 10mV hysteresis to drive PFO on falling PFI voltage.
No watchdog timer is present - distinguishing it from MAX706 variants - and the device operates across -40°C to +85°C with supply voltage range of 3.15V to 5.5V, supporting both +3.3V and +5V µP systems while guaranteeing valid reset output down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reset assertion before 3.3V µP supply drops below operational minimum |
| 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; allows configurable early-warning detection via external resistive divider |
| Operating Temperature | -40°C to +85°C; qualified for industrial-grade embedded applications |
| VCC Range | 3.15V to 5.5V; supports both 3.3V and 5V logic domains without level-shifting |
| RESET Assertion Guarantee | Valid down to VCC = 1V; ensures deterministic reset state during deep brownout |
Pinout & Package
MAX708TEUA is housed in an 8-pin µMAX package (U8-1), measuring 3mm × 3mm with 0.65mm lead pitch, optimized for space-constrained PCB layouts in portable and industrial electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | TTL/CMOS-compatible; 500ns min pulse width at VCC=3V; internally pulled up with 70µA current |
| 2 (VCC) | Positive supply input | Accepts 3.15V–5.5V; bypassing with 0.1µF capacitor to GND recommended for noise immunity |
| 3 (GND) | Ground reference | Common return path for all internal circuits and output drivers |
| 4 (PFI) | Power-fail comparator input | Connects to external resistor divider; asserts PFO when voltage falls below 1.25V |
| 5 (PFO) | Active-low power-fail output | Open-drain output sinking current when PFI < 1.25V; used for µP interrupt or secondary reset initiation |
| 6 (N.C.) | No connection | Not internally bonded; must remain unconnected per datasheet |
| 7 (RESET) | Active-low reset output | Guaranteed low during power-up/brownout; 200ms deassertion delay after VCC > 3.08V |
| 8 (RESET) | Active-high reset output | Complementary to RESET; high during fault conditions; enables interface with µP reset inputs requiring active-high polarity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-polarity reset outputs | Simultaneous RESET (active-high) and RESET (active-low) eliminate need for external inverters in mixed-logic systems |
| Precision 3.08V reset threshold | ±1.5% tolerance over temperature; matches 3.3V µP supply requirements without external calibration |
| 1.25V power-fail comparator | 10mV hysteresis prevents chatter near trip point; supports monitoring of auxiliary supplies (e.g., +12V, -3V) via resistor networks |
| 200ms reset timeout | Internally generated; no external capacitor required; ensures µP core and peripherals fully stabilize before release |
| 100µA quiescent current | Enables multi-year operation on coin-cell batteries in always-on monitoring applications |
Applications
| Battery-Powered Instrumentation | Industrial Microcontroller Systems |
|---|---|
Use Scenario: Handheld multimeter powered by single 3.3V Li-ion cell with AC adapter backup. IC Role / Device Role / Timing Role: Supervises VCC during battery-to-adapter switchover and detects brownout during high-current measurement bursts. Use Value: Dual RESET/RESET outputs directly interface with µP and display controller, eliminating discrete logic; 3.08V threshold aligns with 3.3V rail dropout margin. |
Use Scenario: Programmable logic controller (PLC) I/O module operating in factory environments with noisy 24V DC supply. IC Role / Device Role / Timing Role: Generates synchronized reset for ARM Cortex-M4 and FPGA configuration logic during 24V input ripple events. Use Value: Guaranteed reset assertion down to VCC = 1V prevents metastability; PFO-driven interrupt allows graceful I/O shutdown before power loss. |
| Portable Medical Sensors | Smart Energy Meters |
Use Scenario: Wireless ECG patch using ultra-low-power BLE SoC and analog front-end. IC Role / Device Role / Timing Role: Ensures clean boot sequence and monitors battery voltage decay to trigger low-battery alert before shutdown. Use Value: 100µA supply current extends usable battery life; 1.25V PFI reference enables accurate end-of-life detection via simple resistor divider. |
Use Scenario: DIN-rail mounted electricity meter with isolated RS-485 communication and tamper-detection circuitry. IC Role / Device Role / Timing Role: Provides fail-safe reset for metrology ASIC and secure element during mains voltage sags or lightning-induced transients. Use Value: Dual reset outputs independently control metrology core and communication subsystem; N.C. pin simplifies layout in safety-certified designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708SEUA | 2.93V reset threshold; identical pinout, package, and feature set | Suitable for 3.0V nominal systems where tighter margin below 3.3V rail is required | Select when system VCC tolerance demands earlier reset assertion than 3.08V |
| MAX708REUA | 2.63V reset threshold; same dual-reset architecture and µMAX package | Preferred for legacy 2.7V–3.0V µP platforms or systems with higher supply droop margins | Choose for compatibility with older 3V-only designs or where extended brownout hold time is needed |
Compared with MAX708TEUA, MAX708SEUA triggers reset 150mV earlier - beneficial for systems with steep VCC droop - while MAX708REUA delays reset assertion by ~450mV, offering longer functional uptime before intervention; all three share identical timing, PFI/PFO behavior, and thermal specs.
Availability
MAX708TEUA is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial microcontroller systems, and portable medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX708TEUA 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, automotive, and communications markets.
The MAX708 series belongs to Maxim's microprocessor supervisory product line, engineered specifically for deterministic reset generation, power-fail warning, and manual reset integration in space- and power-constrained embedded systems.
FAQ
What is the reset threshold voltage for MAX708TEUA?
The MAX708TEUA has a fixed reset threshold of 3.08V (VCC falling), with ±1.5% tolerance over temperature. This value is factory-trimmed and applies to both RESET and RESET outputs. It ensures reliable reset assertion before a 3.3V supply falls below the operational minimum of most modern µPs. The threshold is not adjustable and does not require external components.
Does MAX708TEUA include a watchdog timer function?
No, MAX708TEUA does not include a watchdog timer. Unlike the MAX706 family, the MAX708 series replaces the WDI/WDO pins with dual reset outputs (RESET and RESET). This makes MAX708TEUA ideal for applications requiring redundant or polarity-flexible reset signaling without watchdog supervision - confirmed by pin configuration diagrams and functional descriptions in the official datasheet.
What is the purpose of the N.C. pin on MAX708TEUA?
Pin 6 of MAX708TEUA is designated N.C. (No Connection) and is not internally bonded. It must remain unconnected on the PCB. This pin exists for package compatibility with other members of the MAX706/MAX708 family (e.g., MAX706 variants use this pin for WDO). Leaving it floating or connecting it has no electrical effect and complies with Maxim's layout guidance.
Can MAX708TEUA monitor voltages other than VCC?
Yes, MAX708TEUA can monitor auxiliary voltages via its PFI input. By connecting PFI to a resistive divider from an unregulated supply (e.g., +12V or -3V), the internal 1.25V comparator triggers PFO when the divided voltage falls below threshold. This enables early power-fail warning, low-battery detection, or negative-supply monitoring - all documented in Figures 5 and 8 of the MAX708 datasheet.
What is the guaranteed minimum VCC level for valid reset assertion in MAX708TEUA?
MAX708TEUA guarantees RESET and RESET assertion down to VCC = 1V, as explicitly stated in the datasheet's "RESET and RESET Outputs" section and Electrical Characteristics table. Below 1V, the RESET output becomes high-impedance; therefore, a pull-down resistor (e.g., 100kΩ) on RESET is recommended for CMOS inputs to prevent floating states during deep brownout.
MAX708TEUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-µMAX
MAX708TEUA FAQ
1.How can I place an order for MAX708TEUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX708TEUA 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 reliable?
The price and inventory of MAX708TEUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX708TEUA is usually 5 days.
3.What payment methods are accepted for MAX708TEUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX708TEUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX708TEUA?
MAX708TEUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX708TEUA 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?
For technical support, including MAX708TEUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX708TEUA requirements.
6.How does Aetrix verify that MAX708TEUA is sourced from the original manufacturer or authorized distributors?
All MAX708TEUA 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 meets industry standards.
7.What is the process for return or replacement of MAX708TEUA?
All MAX708TEUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX708TEUA, 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 part is unused and in its original packaging.
Return procedure for MAX708TEUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX708TEUA 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…
