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Analog Devices Inc./Maxim Integrated DS1708REUA/T&R
- Part No.:
- DS1708REUA/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1708REUA/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,956
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Product details
Overview
DS1708REUA/T&R from Maxim Integrated is a 3.3V ±20% 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 embedded systems requiring reliable power-up/power-down sequencing.
For engineers reviewing the DS1708REUA/T&R datasheet, DS1708REUA/T&R pinout, DS1708REUA/T&R application, or DS1708REUA/T&R equivalent, key selection criteria include VCC trip point (2.55V–2.70V), NMI timing (200µs pulse, 5µs detection delay), pushbutton debounce behavior, RST/RST output drive capability (10mA sink / 350µA source), and µSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The DS1708REUA/T&R implements a precision bandgap-referenced comparator architecture to monitor both local VCC (trip point 2.55V–2.70V) and remote supply voltage via high-impedance IN pin (1.20V–1.30V threshold). Its dual-reset outputs (RST active-high, RST active-low) are asserted synchronously during power failure and held for ≥130ms after recovery.
It integrates three independent monitoring functions: VCC brownout detection, external voltage sense (with 100µV hysteresis), and debounced pushbutton reset input (PBRST). The NMI output provides early warning of impending power loss with 200µs minimum pulse width and noise immunity against <2µs transients at the trip point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.55V–2.70V (DS1708R variant); ensures reset assertion before 3.3V system instability |
| Reset Pulse Width | 130–285ms; guarantees microprocessor stabilization during power-up and recovery |
| NMI Pulse Width | ≥200µs; provides deterministic early-warning window for controlled shutdown |
| IN Pin Threshold | 1.20–1.30V; enables flexible external voltage sensing via resistor divider |
| Supply Current | 50µA @ VCC < 3.6V; supports ultra-low-power always-on monitoring in battery-backed systems |
| Operating Temp | -40°C to +85°C; validated for industrial-grade reliability without derating |
| Output Drive | 10mA sink (RST), 350µA source (RST); directly interfaces with standard CMOS/TTL inputs |
Pinout & Package
DS1708REUA/T&R is packaged in an 8-pin µSOP (118-mil width, 0.5mm pitch), compatible with automated SMT assembly and high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40kΩ); debounced to guarantee ≥130ms RST/RST assertion on release |
| VCC | Power Supply Input | Monitored supply rail (2.55–2.70V trip); powers internal reference and logic |
| GND | Ground Reference | Common return path for all analog and digital circuitry; must be low-impedance |
| IN | External Voltage Sense Input | High-impedance (≤1µA leakage); accepts divided voltage for upstream supply monitoring |
| RST | Active-High Reset Output | Open-drain, 10mA sink capable; asserts high during fault or power-up hold period |
| RST | Active-Low Reset Output | Push-pull, 350µA source; complements RST for direct connection to /RESET pins |
| NC | No Connect | Unbonded pin; must remain unconnected per design |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low; pulses ≥200µs when IN falls below 1.25V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual Reset Outputs | RST (active-high) and RST (active-low) provide simultaneous interface compatibility with diverse microprocessor /RESET requirements |
| Programmable Sense Point | IN pin with 1.25V threshold enables monitoring of any DC voltage (e.g., 5V, 12V rails) using external resistor divider |
| Integrated Pushbutton Debounce | Eliminates external RC network; guarantees clean 130ms reset pulse regardless of switch bounce duration |
| Early Power-Fail Warning | NMI output triggers ≥200µs before RST assertion, enabling time-critical data save or state preservation |
| Industrial Temperature Range | Validated operation from -40°C to +85°C ensures reliability in harsh environments without thermal derating |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Mainboard power sequencing and brownout recovery in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Primary VCC supervisor and NMI generator for ARM Cortex-M7-based control CPU. Use Value: 130ms reset hold time prevents spurious reboots during line sags; NMI allows firmware to log fault conditions before reset. |
Use Scenario: Power integrity monitoring in portable ultrasound imaging units with battery backup. IC Role / Device Role / Timing Role: Dual-rail supervisor for 3.3V FPGA and 1.2V ADC subsystems, with coordinated reset signaling. Use Value: 50µA quiescent current extends battery life; IN pin monitors 5V DC-DC converter output to detect upstream failures. |
| Telecom Base Station Radio Unit | Automotive Infotainment Head Unit |
|
Use Scenario: Cold-start and transient immunity in remote radio head units exposed to 48V DC supply fluctuations. IC Role / Device Role / Timing Role: VCC supervisor for Xilinx Zynq SoC and DDR3 memory controller power domain. Use Value: 2.55–2.70V trip point aligns with 3.3V LDO tolerance; µSOP-8 footprint saves board space in RF-dense modules. |
Use Scenario: Power management in infotainment head units requiring ASIL-B–compatible reset assurance. IC Role / Device Role / Timing Role: Independent reset generator for application processor and display controller subsystems. Use Value: Pin compatibility with MAX707/708 allows drop-in replacement in legacy designs; NMI supports ISO 26262 diagnostic routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708ESA | 5V ±10% trip point (4.25–4.50V); no IN pin for external sensing; same µSOP-8 package | Lacks NMI and external voltage monitoring; suitable only for single-rail 5V systems | Select when supervising legacy 5V-only designs without need for early warning or multi-rail monitoring |
| TPS3808G33DBVR | 3.3V ±2% trip accuracy; fixed 200ms reset timeout; no NMI output; SOT-23-6 package | Higher trip accuracy but no early-warning interrupt; smaller footprint but no pushbutton debounce | Choose for cost-sensitive, high-accuracy 3.3V monitoring where NMI and PBRST are not required |
Compared with DS1708REUA/T&R, MAX708ESA offers simpler 5V supervision without sensing flexibility, while TPS3808G33DBVR trades NMI and debounce for tighter trip tolerance and smaller size-neither provides the full feature set of dual reset, NMI, and IN monitoring in one µSOP-8 device.
Availability
DS1708REUA/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, telecom radio units, and automotive infotainment head units requiring stable component supply with guaranteed long-term availability.
Supply support for DS1708REUA/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) designs precision analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1708REUA/T&R belongs to the MicroMonitor™ family of voltage supervisors, engineered specifically for robust power-fail detection, reset generation, and early-warning interrupt signaling in mission-critical embedded systems.
FAQ
What is the exact VCC trip point range for DS1708REUA/T&R?
The DS1708REUA/T&R has a guaranteed VCC trip point range of 2.55V to 2.70V, corresponding to the DS1708R variant specified for 3.3V ±20% monitoring. This range is tested and characterized over the full -40°C to +85°C operating temperature and applies to the actual DS1708REUA/T&R device shipped in µSOP-8 packaging.
Does DS1708REUA/T&R support external voltage monitoring, and how is it implemented?
Yes, DS1708REUA/T&R supports external voltage monitoring via its IN pin, which has a precise 1.20V–1.30V threshold. A resistor divider scales the target supply (e.g., 5V or 12V) down to this range. The DS1708REUA/T&R datasheet provides the formula VSENSE = (R2/(R1+R2)) × 1.25V to calculate divider values, ensuring accurate early detection of upstream supply faults.
How does the NMI output of DS1708REUA/T&R differ from the RST outputs in timing and function?
The NMI output of DS1708REUA/T&R pulses low for ≥200µs when the IN pin voltage drops below 1.25V, providing early warning before RST/RST assert. In contrast, RST and RST activate only after VCC falls below 2.55V and remain active for ≥130ms after recovery. This staged response gives firmware time to save critical data before hard reset.
Is DS1708REUA/T&R pin-compatible with other members of the DS1707/DS1708 family?
Yes, DS1708REUA/T&R shares identical pinout and package dimensions with all DS1707/DS1708 variants in µSOP-8 (U) packaging, including DS1708EUA and DS1708SEUA. All share the same PBRST/VCC/GND/IN/RST/RST/NC/NMI arrangement, enabling direct substitution within the same voltage-tolerance grade.
What is the reset pulse width specification for DS1708REUA/T&R, and is it guaranteed across temperature?
The DS1708REUA/T&R guarantees a minimum reset pulse width of 130ms for both RST and RST outputs, with a maximum of 285ms, fully characterized across the -40°C to +85°C operating range. This specification is verified under all valid VCC conditions (1.2V–5.5V) and ensures consistent microprocessor initialization timing in industrial environments.
DS1708REUA/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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
DS1708REUA/T&R FAQ
1.How can I place an order for DS1708REUA/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1708REUA/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 DS1708REUA/T&R reliable?
The price and inventory of DS1708REUA/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 DS1708REUA/T&R is usually 5 days.
3.What payment methods are accepted for DS1708REUA/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1708REUA/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1708REUA/T&R?
DS1708REUA/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1708REUA/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 DS1708REUA/T&R?
For technical support, including DS1708REUA/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1708REUA/T&R requirements.
6.How does Aetrix verify that DS1708REUA/T&R is sourced from the original manufacturer or authorized distributors?
All DS1708REUA/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 DS1708REUA/T&R meets industry standards.
7.What is the process for return or replacement of DS1708REUA/T&R?
All DS1708REUA/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1708REUA/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 DS1708REUA/T&R part is unused and in its original packaging.
Return procedure for DS1708REUA/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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