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Analog Devices Inc./Maxim Integrated MAX708SCSA-T
- Part No.:
- MAX708SCSA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX708SCSA-T.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:32,300
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Product details
Overview
MAX708SCSA-T from Maxim Integrated is a +3V microprocessor supervisory circuit providing dual active-high and active-low reset outputs, 2.93V precision supply-voltage monitoring, 200ms reset pulse width, and power-fail warning via 1.25V threshold comparator - used in battery-powered portable instruments and embedded controllers to ensure reliable power-up sequencing and brownout recovery.
For engineers reviewing the MAX708SCSA-T datasheet, MAX708SCSA-T pinout, MAX708SCSA-T application, or MAX708SCSA-T equivalent, this page delivers verified functional identity, exact reset threshold (2.93V), dual-reset architecture, guaranteed RESET assertion down to VCC = 1V, and confirmed SO-8 package compatibility for industrial and portable system design.
Technical Context
The MAX708SCSA-T integrates a precision voltage monitor with hysteresis (20mV), a reset generator with fixed 200ms delay, and an independent power-fail comparator with 1.25V internal reference. It lacks watchdog functionality-distinguishing it from MAX706 variants-and asserts both RESET (active-high) and RESET (active-low) simultaneously during VCC undervoltage or manual reset events.
Its dual-reset output architecture enables direct interface with µPs requiring either polarity, while the PFI/PFO pair supports external voltage monitoring (e.g., unregulated DC rails) without loading the main supply. The device operates across VCC = 1.2V to 5.5V and guarantees reset assertion down to VCC = 1V, supporting low-voltage brownout detection in +3V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (VCC falling); precise trip point for +3.3V system monitoring with 20mV hysteresis |
| Reset Pulse Width | 200ms typical; ensures µP reset duration meets minimum initialization timing requirements |
| Supply Voltage Range | 1.2V to 5.5V; supports operation during deep brownout and compatibility with +3V/+5V systems |
| Quiescent Current | 100µA max at VCC < 3.6V; enables long battery life in portable equipment |
| Power-Fail Threshold | 1.25V internal reference; allows configurable PFI monitoring of auxiliary supplies or battery voltage |
| Output Drive | RESET: VOL ≤ 0.3V @ 500µA sink; RESET: VOH ≥ 0.8×VCC @ 500µA source - ensures TTL/CMOS logic compatibility |
| Operating Temperature | -40°C to +85°C; qualified for industrial-grade embedded applications |
Pinout & Package
MAX708SCSA-T is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount compatible, with standard 1.27mm pitch and JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with 70µA current; debounced by 200ms reset timer |
| 2 VCC | Positive supply input | Accepts 1.2V–5.5V; reset asserted down to VCC = 1V; bypass with 0.1µF capacitor recommended |
| 3 GND | Ground reference | Common return for all internal circuits and output sinks |
| 4 PFI | Power-fail comparator input | High-impedance node referenced to 1.25V internal threshold; connects to resistive divider for custom voltage monitoring |
| 5 PFO | Active-low power-fail output | Asserts low when PFI < 1.25V; drives interrupt or initiates orderly shutdown sequence |
| 6 RESET | Active-low reset output | Complementary to RESET; asserted during VCC undervoltage, MR low, or brownout |
| 7 RESET | Active-high reset output | Dual-output capability eliminates need for external inverters in mixed-logic systems |
| 8 NC | No connection | Not internally bonded; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual active-high and active-low reset outputs | Eliminates external level-shifting or inversion for µPs with incompatible reset polarity requirements |
| Precision 2.93V reset threshold with 20mV hysteresis | Ensures stable reset assertion/deassertion in noisy +3.3V environments without chatter |
| Guaranteed RESET assertion to VCC = 1V | Provides fail-safe reset coverage through deep brownout conditions before supply collapse |
| 1.25V internal reference for PFI comparator | Enables accurate, low-drift monitoring of secondary supplies (e.g., unregulated DC, battery) without external references |
| 200ms reset time delay | Meets common µP reset timing specifications and accommodates slow-rising VCC in battery-backed systems |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers |
|---|---|
|
Use Scenario: Handheld multimeters and data loggers powered by single Li-ion or alkaline cells with variable discharge profiles. IC Role / Device Role / Timing Role: Supervisory circuit ensuring µP remains held in reset until battery voltage stabilizes above 2.93V and remains asserted during voltage sag. Use Value: Prevents erratic firmware execution during battery insertion or low-voltage transients, extending field reliability. |
Use Scenario: PLC I/O modules operating in factory environments with fluctuating 3.3V rail due to EMI or load switching. IC Role / Device Role / Timing Role: Dual-reset supervisor asserting both polarities to interface with legacy and modern µPs on same board. Use Value: Enables backward-compatible reset signaling without redesigning reset distribution network. |
| Computers & Embedded Systems | Critical µP Power Monitoring |
|
Use Scenario: Low-power microcontroller-based gateways using +3.3V supply derived from buck converter with soft-start behavior. IC Role / Device Role / Timing Role: Monitors VCC rise/fall and provides synchronized 200ms reset pulse to align with µP power-on reset timing. Use Value: Eliminates need for RC-based reset generators, improving temperature and aging stability. |
Use Scenario: Medical sensor nodes where supply integrity directly impacts safety-critical firmware state. IC Role / Device Role / Timing Role: Provides redundant reset assertion (both polarities) and early power-fail warning via PFO to trigger data save before shutdown. Use Value: Meets IEC 62304 Class B software safety requirements for deterministic power-loss response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708RCSA | 2.63V reset threshold; identical pinout, dual-reset, no watchdog | Suitable for +3.0V systems or tighter undervoltage margins | Select when main supply nominal is 3.0V and 2.63V trip provides required noise margin |
| MAX708TCSA | 3.08V reset threshold; identical pinout, dual-reset, no watchdog | Optimized for +3.3V systems with higher tolerance to ripple | Choose for 3.3V rails with >5% tolerance or where earlier reset assertion is undesirable |
Compared with MAX708RCSA and MAX708TCSA, the MAX708SCSA-T offers a mid-range 2.93V threshold ideal for standard +3.3V supplies, balancing noise immunity and reset timing margin without requiring layout changes or component substitution.
Availability
MAX708SCSA-T is available at Aetrix Electronics and suitable for battery-powered equipment, industrial controllers, and embedded computing applications requiring stable component supply, long-term lifecycle support, and guaranteed lead-free SO-8 packaging.
Supply support for MAX708SCSA-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) designs high-performance analog and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX708 family delivers cost-effective, integrated µP supervision for +3V systems - emphasizing precision voltage monitoring, dual-reset flexibility, and low-quiescent-current operation in portable and embedded platforms.
FAQ
What is the reset threshold voltage of the MAX708SCSA-T?
The MAX708SCSA-T has a precision reset threshold of 2.93V (VCC falling), with 20mV hysteresis. This value is factory-trimmed and guaranteed over temperature (-40°C to +85°C). It is specifically designed for reliable monitoring of +3.3V power rails, and the MAX708SCSA-T datasheet confirms this threshold applies to all S-suffix variants including MAX708SCSA-T.
Does the MAX708SCSA-T include a watchdog timer function?
No, the MAX708SCSA-T does not include a watchdog timer. Unlike the MAX706 series, the MAX708 family replaces the watchdog input/output (WDI/WDO) with dual reset outputs (RESET and RESET). The MAX708SCSA-T pinout omits WDI and WDO pins entirely, confirming its dedicated role as a dual-polarity reset supervisor without timeout monitoring.
What package type is used for the MAX708SCSA-T?
The MAX708SCSA-T is supplied in an 8-pin SO (Small Outline) package, designated S8-2 in Maxim's ordering nomenclature. It is a surface-mount, lead-free RoHS-compliant device with 1.27mm pin pitch and JEDEC MS-012AC footprint - identical to industry-standard SOIC-8 layouts.
Can the MAX708SCSA-T monitor voltages other than VCC?
Yes, the MAX708SCSA-T includes a dedicated power-fail comparator with PFI input and PFO output. Its internal 1.25V reference allows monitoring of auxiliary supplies (e.g., unregulated DC, battery, negative rails) by connecting PFI to a resistive divider. The MAX708SCSA-T datasheet provides example circuits for both positive and negative voltage monitoring using this feature.
What is the minimum supply voltage at which MAX708SCSA-T guarantees reset assertion?
The MAX708SCSA-T guarantees RESET and RESET assertion down to VCC = 1V, as explicitly stated in the datasheet's "RESET and RESET Outputs" section. This ensures fail-safe reset behavior during deep brownout conditions well below the 2.93V trip point, and the MAX708SCSA-T maintains valid logic levels on both outputs until VCC drops below 1V.
MAX708SCSA-T 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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX708SCSA-T FAQ
1.How can I place an order for MAX708SCSA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX708SCSA-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 MAX708SCSA-T reliable?
The price and inventory of MAX708SCSA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX708SCSA-T is usually 5 days.
3.What payment methods are accepted for MAX708SCSA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX708SCSA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX708SCSA-T?
MAX708SCSA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX708SCSA-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 MAX708SCSA-T?
For technical support, including MAX708SCSA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX708SCSA-T requirements.
6.How does Aetrix verify that MAX708SCSA-T is sourced from the original manufacturer or authorized distributors?
All MAX708SCSA-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 MAX708SCSA-T meets industry standards.
7.What is the process for return or replacement of MAX708SCSA-T?
All MAX708SCSA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX708SCSA-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 MAX708SCSA-T part is unused and in its original packaging.
Return procedure for MAX708SCSA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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