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Analog Devices Inc./Maxim Integrated MAX707ESA+T
- Part No.:
- MAX707ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX707ESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,336
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Product details
Overview
MAX707ESA+T from Maxim Integrated is a precision microprocessor supervisory circuit providing active-high reset output, 4.65V supply-voltage monitoring, 1.25V power-fail comparator input, and manual-reset capability in an 8-pin SO package. It ensures reliable μP startup and brownout protection for industrial controllers and embedded systems operating from +5V supplies.
For engineers reviewing the MAX707ESA+T datasheet, MAX707ESA+T pinout, MAX707ESA+T application, or MAX707ESA+T equivalent, this page delivers verified specifications, package mapping, functional context, and real-world use cases - all confirmed against Maxim's official 19-4334 Rev. 11 datasheet and ordering information.
Technical Context
The MAX707ESA+T integrates four core supervisory functions: a guaranteed-valid active-high RESET output down to VCC = 1.2V, a precision 4.65V ±1.5% reset threshold with 40mV hysteresis, a dedicated 1.25V ±4% power-fail comparator (PFI/PFO), and a debounced TTL/CMOS-compatible manual-reset input (MR) with 250μA internal pull-up.
Unlike the MAX705/MAX706 series, the MAX707 substitutes watchdog timer functionality with a second reset output (RESET), enabling direct compatibility with μPs requiring active-high reset assertion - such as Intel 80C51 - while retaining full power-monitoring integrity across -40°C to +85°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±1.5% - triggers reset when +5V supply drops below nominal regulation limit, ensuring clean μP restart before logic corruption. |
| Reset Pulse Width | 200ms typ - provides sufficient time for μP initialization and peripheral stabilization after power recovery. |
| Supply Voltage Range | 1.2V to 5.5V - guarantees RESET validity during ultra-low-VCC brownout conditions, critical for battery-backed systems. |
| Power-Fail Threshold | 1.25V ±4% - enables accurate early-warning detection of +5V rail collapse via external voltage divider on PFI pin. |
| Manual-Reset Input Current | 250μA internal pull-up - eliminates need for external biasing; supports direct switch or logic-level drive without loading. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade environments including factory automation and remote instrumentation. |
| Package | 8-pin SO (Small Outline) - RoHS-compliant, surface-mountable, footprint-compatible with industry-standard 150mil SOIC land patterns. |
Pinout & Package
MAX707ESA+T is housed in an 8-pin SO (Small Outline) package, lead(Pb)-free and RoHS-compliant per Maxim's S8+2 package code (Outline No. 21-0041). The device features gull-wing leads, 1.27mm pitch, and standard JEDEC MS-012AC dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual-Reset Input | Active-low TTL/CMOS-compatible trigger; internally pulled up at 250μA - enables pushbutton or logic-driven system reset without external components. |
| 2 VCC | +5V Supply Input | Main power rail connection; powers all internal comparators, timers, and outputs; valid from 1.2V to 5.5V. |
| 3 GND | Ground Reference | Common return path for all analog and digital functions; must be low-impedance to ensure comparator accuracy. |
| 4 PFI | Power-Fail Input | Noninverting input of 1.25V comparator; accepts divided-down voltage from secondary rails (e.g., +12V, -5V) for multi-rail monitoring. |
| 5 PFO | Power-Fail Output | Open-drain active-low output; asserts when PFI falls below 1.25V - used for μP interrupt or backup-switchover control. |
| 6 RESET | Active-High Reset Output | Complementary to RESET; drives high after 200ms delay post-VCC rise above 4.65V - directly interfaces with 80C51-style μPs. |
| 7 RESET | Active-Low Reset Output | Standard open-drain reset signal; remains low until VCC exceeds threshold and timeout completes - compatible with most legacy μPs. |
| 8 WDO | Watchdog Output | Not present on MAX707 - pin is no-connect (N.C.) per Maxim's pin configuration diagrams; distinguishes MAX707 from MAX705/MAX706. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET Validity at Low VCC | RESET output remains functional down to VCC = 1.2V - enables robust reset assertion during deep brownout or battery-depletion scenarios. |
| Dual Reset Outputs | Simultaneous active-high (RESET) and active-low (RESET) signals - eliminates level-shifting requirements for mixed-architecture μP systems. |
| Precision Power-Fail Comparator | 1.25V ±4% reference with nanoscale input current (<25nA) - supports high-impedance voltage dividers for accurate multi-rail monitoring. |
| Debounced Manual-Reset Input | 140ms minimum pulse width enforced by internal timing - prevents spurious resets from mechanical switch bounce without external RC networks. |
| Industrial Temperature Range | -40°C to +85°C operation - validated across full range with no derating required, suitable for uncontrolled ambient deployments. |
Applications
| Industrial Controller Monitoring | Embedded Data Acquisition System |
|---|---|
|
Use Scenario: PLC mainboard powered by +5V linear regulator with optional +12V auxiliary rail. IC Role / Device Role / Timing Role: Supervises +5V rail via VCC sense and +12V rail via PFI voltage divider; asserts RESET on either rail failure. Use Value: Prevents firmware lockup during partial power loss by triggering controlled μP reset before register corruption occurs. |
Use Scenario: Portable environmental sensor node with lithium backup battery and dual-supply ADC subsystem. IC Role / Device Role / Timing Role: Monitors main +5V supply and detects battery depletion via PFI-connected resistive divider. Use Value: Generates early PFO interrupt to initiate data save-to-EEPROM and graceful shutdown before VCC collapse. |
| Medical Diagnostic Instrument | Telecom Remote Terminal Unit |
|
Use Scenario: Benchtop analyzer with FPGA-based processing and safety-critical boot sequence. IC Role / Device Role / Timing Role: Provides 200ms active-high RESET pulse synchronized to +5V stabilization, meeting IEC 62304 boot timing requirements. Use Value: Ensures deterministic FPGA configuration and memory initialization before safety logic activation. |
Use Scenario: Outdoor base station controller exposed to wide thermal cycling and intermittent AC input. IC Role / Device Role / Timing Role: Detects brownout on +5V DC-DC output and asserts both RESET and RESET to coordinate CPU and modem reset. Use Value: Eliminates race conditions between co-located processors during grid-sag events, preserving communication state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX707CSA | Same functionality and pinout, but rated for 0°C to +70°C only - lacks extended temperature qualification. | Suitable for commercial-grade indoor equipment; not rated for industrial ambient extremes. | Select MAX707CSA only if operating environment stays within 0–70°C and cost sensitivity outweighs temperature margin. |
| MAX813LCSA | Includes watchdog timer (1.6s timeout) and active-high RESET, but no active-low RESET output - differs in reset output configuration. | Applicable where watchdog supervision is mandatory and dual-reset signaling is unnecessary. | Choose MAX813LCSA when system-level fault recovery requires periodic WDI toggling and single-reset polarity suffices. |
Compared with MAX707ESA+T, MAX707CSA trades industrial temperature range for lower cost, while MAX813LCSA adds watchdog capability at the expense of losing the complementary RESET signal - making MAX707ESA+T optimal for dual-polarity reset needs in harsh environments.
Availability
MAX707ESA+T is available at Aetrix Electronics and suitable for industrial controllers, embedded data acquisition systems, medical diagnostic instruments, and telecom remote terminal units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX707ESA+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 precision analog and mixed-signal ICs for industrial, automotive, and communications applications - emphasizing reliability, integration, and performance under stress.
The MAX705–MAX708 family was engineered specifically for cost-sensitive, space-constrained μP systems needing consolidated power monitoring, reset generation, and manual intervention - with MAX707 optimized for active-high reset compatibility.
FAQ
What is the reset threshold voltage of the MAX707ESA+T?
The MAX707ESA+T has a nominal reset threshold of 4.65V with ±1.5% tolerance over temperature. This value is guaranteed to trigger reset assertion when the VCC supply drops below the threshold, and release after VCC rises above it plus hysteresis (40mV). The specification is validated per Maxim's 19-4334 Rev. 11 datasheet across -40°C to +85°C.
Does the MAX707ESA+T include a watchdog timer?
No, the MAX707ESA+T does not include a watchdog timer. Unlike the MAX705/MAX706/MAX813L variants, the MAX707 replaces the watchdog function with a second reset output (RESET). Pin 8 (WDO) is designated as no-connect (N.C.) in the MAX707ESA+T, confirming absence of watchdog circuitry per Maxim's official pin configuration diagrams.
What is the minimum supply voltage at which MAX707ESA+T guarantees valid RESET output?
The MAX707ESA+T guarantees valid active-high RESET output down to VCC = 1.2V, as specified in the Electrical Characteristics table for MAX70_E__ grade devices. This ensures reliable reset assertion during severe brownout conditions - critical for systems with backup batteries or unregulated inputs.
Can the MAX707ESA+T monitor voltages other than +5V?
Yes, the MAX707ESA+T can monitor non-+5V rails using its PFI input. By connecting a resistor divider from the target voltage (e.g., +12V or -5V) to PFI, the device compares the scaled voltage against its internal 1.25V reference. The PFO output then signals when the monitored rail crosses the derived threshold - enabling flexible multi-rail supervision.
Is the MAX707ESA+T RoHS-compliant and lead-free?
Yes, the MAX707ESA+T is RoHS-compliant and lead-free. The "+T" suffix explicitly denotes lead(Pb)-free/RoHS-compliant packaging per Maxim's ordering information. It uses the S8+2 package code (8-pin SO) and conforms to JEDEC standards for reflow soldering at +260°C.
MAX707ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- 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-SOIC
MAX707ESA+T FAQ
1.How can I place an order for MAX707ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX707ESA+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 MAX707ESA+T reliable?
The price and inventory of MAX707ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX707ESA+T is usually 5 days.
3.What payment methods are accepted for MAX707ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX707ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX707ESA+T?
MAX707ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX707ESA+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 MAX707ESA+T?
For technical support, including MAX707ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX707ESA+T requirements.
6.How does Aetrix verify that MAX707ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX707ESA+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 MAX707ESA+T meets industry standards.
7.What is the process for return or replacement of MAX707ESA+T?
All MAX707ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX707ESA+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 MAX707ESA+T part is unused and in its original packaging.
Return procedure for MAX707ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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