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Analog Devices Inc./Maxim Integrated DS1708EUA+T&R
- Part No.:
- DS1708EUA+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1708EUA+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,103
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Product details
Overview
DS1708EUA+T&R from Maxim Integrated is a 5.0V, ±10% supply voltage supervisor IC with dual active-high/active-low reset outputs, non-maskable interrupt (NMI), and pushbutton reset debouncing. It monitors VCC and an external sense point (IN), delivers 130ms minimum reset pulse width, and operates across -40°C to +85°C for industrial microprocessor power management.
For engineers reviewing the DS1708EUA+T&R datasheet, DS1708EUA+T&R pinout, DS1708EUA+T&R application, or DS1708EUA+T&R equivalent, key selection criteria include VCC trip point accuracy (4.25V–4.50V), NMI timing (200µs pulse, 5µs detection delay), RST/RST output drive capability (10mA sink / 350µA source), and µSOP-8 package compatibility with space-constrained embedded control systems.
Technical Context
The DS1708EUA+T&R implements a precision bandgap-referenced comparator architecture to monitor both local VCC (trip point 4.25V–4.50V) and remote supply voltage via high-impedance IN pin (1.25V threshold). Its dual-reset outputs (RST active-high, RST active-low) provide simultaneous interface flexibility with diverse microprocessor reset inputs.
It integrates three independent monitoring functions: power-fail detection (generating NMI ≥200µs before reset assertion), pushbutton reset debouncing (guaranteed 130ms pulse on PBRST release), and power-up reset hold (130–285ms minimum after VCC stabilization). All functions operate without external components across 1.2V–5.5V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25V (min) to 4.50V (max); ensures reliable reset assertion during 5.0V supply brownout |
| Reset Pulse Width | 130ms (min); guarantees sufficient time for microprocessor and power supply stabilization |
| NMI Pulse Width | 200µs (min); provides early warning of impending power failure before reset activation |
| IN Pin Threshold | 1.20V–1.30V; enables user-configurable voltage sensing via external resistor divider |
| Supply Current | 60µA (max at VCC < 5.5V); supports low-power always-on supervision in battery-backed systems |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded control and automation equipment |
| Package | 8-pin µSOP (118-mil); 3.0mm × 3.0mm footprint ideal for compact PCB layouts |
Pinout & Package
DS1708EUA+T&R uses an 8-pin µSOP (118-mil) package with exposed pad for thermal performance. Pin numbering follows standard SOIC/SOP convention (pin 1 = PBRST, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40kΩ); debounced to generate guaranteed 130ms RST/RST pulse on release |
| VCC | Power Supply Input | Primary supply input (1.2V–5.5V); powers internal reference, comparators, and output drivers |
| GND | Ground Reference | Common return path for all analog and digital circuitry; must be low-impedance connection |
| IN | Voltage Sense Input | High-impedance (≤1µA leakage) input for monitoring external supply via resistor divider; 1.25V threshold |
| RST | Active-High Reset Output | CMOS-compatible output; sinks 10mA, sources 350µA; asserted when VCC or IN falls out-of-tolerance |
| RST | Active-Low Reset Output | Complementary to RST; enables direct connection to processors requiring active-low reset assertion |
| NC | No Connect | Unbonded pin; must remain unconnected per design; no electrical function |
| NMI | Non-Maskable Interrupt Output | Open-drain output; pulses low ≥200µs upon IN voltage decay; used for early power-fail warning |
Key Features
| Feature | Design Value |
|---|---|
| Dual Reset Outputs (RST/RST) | Simultaneous active-high and active-low signals eliminate level-shifting requirements for mixed-logic systems |
| Programmable Voltage Sensing (IN) | 1.25V internal reference allows monitoring of any DC supply (e.g., 12V, 24V) using external resistor divider |
| Integrated Pushbutton Debounce | Hardware-based timing eliminates need for external RC network or firmware debounce logic |
| Early Warning NMI | 200µs NMI pulse generated ~5µs before reset activation, enabling controlled system shutdown or data save |
| Industrial Temperature Range | -40°C to +85°C operation ensures reliability in harsh environments such as factory automation and outdoor electronics |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller operating in factory floor environment with fluctuating 24VDC input and 5V regulation. IC Role / Device Role / Timing Role: Primary power supervisor ensuring safe reset during line transients and providing NMI-triggered emergency I/O freeze. Use Value: Prevents corrupted state machine execution by asserting RST/RST within 8µs of VCC drop below 4.25V and delivering 200µs NMI warning for last-chance data logging. |
Use Scenario: Portable ultrasound device with battery backup and dual 3.3V/5V rails requiring fail-safe boot sequencing and power-loss response. IC Role / Device Role / Timing Role: Central voltage monitor coordinating reset timing between main SoC and auxiliary sensor subsystems. Use Value: Guarantees 130ms minimum reset hold during cold start and enables coordinated shutdown via NMI-driven firmware save routine before VCC collapse. |
| Automotive Infotainment Head Unit | Smart Energy Meter |
Use Scenario: In-vehicle infotainment system powered from 12V automotive battery with wide transient range (-0.5V to +16V) and 5V LDO. IC Role / Device Role / Timing Role: Supervisory watchdog interfacing with MCU reset and NMI pins to detect upstream rail instability before processor lockup. Use Value: Uses IN pin to monitor 12V input via resistor divider (R1=26kΩ, R2=10kΩ), triggering NMI at 11.88V to initiate graceful UI shutdown prior to 5V rail collapse. |
Use Scenario: ANSI C12.20-compliant electricity meter with isolated power supplies and tamper-detection circuitry requiring deterministic reset behavior. IC Role / Device Role / Timing Role: Critical reset generator ensuring EEPROM write completion and secure state preservation during AC mains interruption. Use Value: Delivers precise 130ms reset pulse and leverages NMI to trigger cryptographic key sealing before final power loss, meeting regulatory data integrity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708ESA+ | Same pinout, identical RST/RST/NMI/PBRST functionality; VCC trip point 4.40V (±5%), higher ICC (120µA) | Designed for 5V ±5% systems; lacks DS1708EUA+T&R's 10% tolerance option and lower quiescent current | Select MAX708ESA+ only if tighter trip point tolerance (±5%) is required and higher supply current is acceptable |
| TPS3808G15DBVR | Single active-low reset output; 1.5V fixed threshold; no NMI or PBRST; 1.6µA ICC; SOT-23-6 package | Ultra-low-power, single-rail monitoring only; no dual reset, no interrupt, no pushbutton support | Choose TPS3808G15DBVR for battery-powered devices needing minimal current draw and simple 1.5V rail supervision |
Compared with MAX708ESA+, DS1708EUA+T&R offers lower operating current (60µA vs. 120µA) and ±10% trip tolerance optimized for cost-sensitive industrial designs; versus TPS3808G15DBVR, it provides full feature parity (dual reset, NMI, PBRST) at higher current but essential for complex multi-rail systems requiring coordinated power management.
Availability
DS1708EUA+T&R is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive infotainment, and smart energy metering requiring stable component supply and long-term lifecycle support.
Supply support for DS1708EUA+T&R 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 analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1708EUA+T&R belongs to the MicroMonitor™ family of voltage supervisors, designed specifically for robust, component-free power monitoring and reset generation in microprocessor-based systems operating under noisy or unstable supply conditions.
FAQ
What is the VCC trip point specification for DS1708EUA+T&R?
The DS1708EUA+T&R has a guaranteed VCC trip point range of 4.25V (minimum) to 4.50V (maximum) at -40°C to +85°C, corresponding to a nominal 5.0V supply with ±10% tolerance. This specification ensures consistent reset assertion during brownout conditions and is validated across temperature and process variations. The DS1708EUA+T&R does not support adjustable trip points - its threshold is factory-trimmed and fixed.
Does DS1708EUA+T&R support monitoring of voltages other than 5V?
Yes, DS1708EUA+T&R supports monitoring of any DC voltage via its IN pin, which compares the applied voltage against an internal 1.25V reference. Using an external resistor divider (e.g., R1=26kΩ, R2=10kΩ), users can configure the DS1708EUA+T&R to detect drops in 12V, 24V, or other supply rails. The IN pin is high-impedance (≤1µA leakage), minimizing loading on the monitored circuit.
How does the NMI output of DS1708EUA+T&R differ from the RST outputs?
The NMI output of DS1708EUA+T&R provides an early-warning signal that activates ~5µs before RST/RST assertion, with a minimum pulse width of 200µs. Unlike RST/RST - which halt processor execution - NMI allows firmware to perform critical tasks (e.g., data save, I/O freeze) before power collapse. NMI is open-drain and requires an external pull-up; RST/RST are CMOS-compatible push-pull outputs.
Can DS1708EUA+T&R replace MAX708 in existing designs?
Yes, DS1708EUA+T&R is pin-compatible with MAX708 in 8-pin SOIC and µSOP packages and shares identical pin functions (PBRST, VCC, GND, IN, RST, RST, NC, NMI). However, DS1708EUA+T&R has a different VCC trip point (4.25V–4.50V vs. MAX708's 4.40V ±5%) and lower quiescent current (60µA vs. 120µA), so system-level validation of reset timing and tolerance margins is recommended.
What is the minimum reset pulse width guaranteed by DS1708EUA+T&R?
The DS1708EUA+T&R guarantees a minimum reset pulse width of 130ms for both RST (active-high) and RST (active-low) outputs, whether triggered by VCC dropout, IN voltage decay, or PBRST button release. This duration is maintained across the full -40°C to +85°C temperature range and 1.2V–5.5V supply voltage, ensuring reliable microprocessor initialization and power supply stabilization.
DS1708EUA+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- 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:
- 4.4V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 130ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
DS1708EUA+T&R FAQ
1.How can I place an order for DS1708EUA+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1708EUA+T&R 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 DS1708EUA+T&R reliable?
The price and inventory of DS1708EUA+T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1708EUA+T&R is usually 5 days.
3.What payment methods are accepted for DS1708EUA+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1708EUA+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1708EUA+T&R?
DS1708EUA+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1708EUA+T&R 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 DS1708EUA+T&R?
For technical support, including DS1708EUA+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1708EUA+T&R requirements.
6.How does Aetrix verify that DS1708EUA+T&R is sourced from the original manufacturer or authorized distributors?
All DS1708EUA+T&R 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 DS1708EUA+T&R meets industry standards.
7.What is the process for return or replacement of DS1708EUA+T&R?
All DS1708EUA+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1708EUA+T&R, 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 DS1708EUA+T&R part is unused and in its original packaging.
Return procedure for DS1708EUA+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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