My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX707EPA
- Part No.:
- MAX707EPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX707EPA.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:546
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX707EPA from Maxim Integrated is a precision microprocessor supervisory circuit in 8-pin PDIP package, providing active-high RESET output, power-fail warning (PFI/PFO), manual-reset input (MR), and watchdog timer disable-replacing discrete reset generators in industrial controllers and embedded systems requiring −40°C to +85°C operation and 4.65V reset threshold.
For engineers reviewing the MAX707EPA datasheet, MAX707EPA pinout, MAX707EPA application, or MAX707EPA equivalent, this device delivers guaranteed RESET validity down to VCC = 1.2V, 200ms reset pulse width, TTL/CMOS-compatible debounced MR input, and integrated 1.25V power-fail comparator for battery-low detection or auxiliary supply monitoring.
Technical Context
The MAX707EPA implements a dual-threshold supervisory architecture: a precision 4.65V ±1.5% supply monitor with 40mV hysteresis triggers a 140–280ms active-high RESET pulse on brownout, while its independent 1.25V ±4% PFI comparator asserts PFO low for early power-fail warning. The MR input features internal 250μA pull-up and 150ns minimum pulse width tolerance.
No watchdog timer is present-the MAX707EPA substitutes active-high RESET for WDO/WDI functionality found in MAX705/MAX706, enabling direct interface with Intel 80C51-class μPs requiring high-asserted reset. All outputs are CMOS/TTL compatible with guaranteed sink/source drive strength across full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±1.5% - ensures reliable reset assertion before +5V rail collapse in industrial power supplies |
| Reset Pulse Width | 200ms typical - meets μP minimum reset hold-time requirements without external timing components |
| Supply Voltage Range | 1.2V to 5.5V - guarantees RESET output validity during deep brownout and battery backup operation |
| PFI Threshold | 1.25V ±4% - enables accurate low-battery detection or secondary supply monitoring via external divider |
| MR Input Current | 100–600μA pull-up - supports direct switch closure or logic-level triggering without external bias |
| Quiescent Current | 50–500μA - minimizes standby power in battery-backed systems over −40°C to +85°C |
| RESET Output Drive | ISINK = 1.2mA @ 0.4V - directly drives standard CMOS/TTL inputs without buffer stage |
Pinout & Package
MAX707EPA uses an 8-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin 1 is marked by notch or dot; leads are tin-lead or RoHS-compliant (add '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual-Reset Input | Active-low TTL/CMOS-compatible trigger with internal 250μA pull-up; debounced by 140ms min reset pulse |
| 2 (VCC) | +5V Supply Input | Primary power rail connection; RESET valid down to 1.2V supply level |
| 3 (GND) | Ground Reference | Common return for all analog and digital functions; must be low-impedance |
| 4 (PFI) | Power-Fail Input | High-impedance comparator input referenced to 1.25V; used for battery-low or auxiliary supply monitoring |
| 5 (PFO) | Power-Fail Output | Active-low open-drain output asserting when PFI < 1.25V; sinks ≥3.2mA |
| 6 (N.C.) | No Connect | Unbonded die pad; must remain unconnected per datasheet |
| 7 (RESET) | Active-High Reset Output | CMOS/TTL-compatible push-pull output; asserted high during reset and brownout |
| 8 (WDO/RESET) | Watchdog Output / Active-Low Reset | Not functional in MAX707EPA - pin is internally unused (no watchdog timer); reserved for family compatibility |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET at VCC = 1.2V | Enables fail-safe reset assertion during severe brownout or battery depletion without external supervision |
| Integrated 1.25V Precision Comparator | Supports accurate power-fail warning or low-battery detection using only two external resistors |
| Debounced Manual-Reset Input | Eliminates need for external RC debounce network; 150ns MR pulse rejection prevents false triggers |
| 40mV Reset Threshold Hysteresis | Prevents oscillatory reset assertion during slow-rising/falling VCC transitions near threshold |
| −40°C to +85°C Operating Range | Validated for industrial control, automotive under-hood, and outdoor embedded applications |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Monitors +5V DC supply in programmable logic controller rack during factory floor voltage sags. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to halt CPU execution and preserve I/O state during undervoltage events. Use Value: Prevents corrupted ladder logic execution and relay chatter by guaranteeing 200ms reset hold time even as VCC drops to 1.2V. | Use Scenario: Detects declining backup battery voltage in portable ultrasound unit prior to main power loss. IC Role / Device Role / Timing Role: Power-fail comparator (PFI/PFO) triggers orderly shutdown sequence via microcontroller interrupt before data loss. Use Value: 1.25V ±4% PFI threshold enables precise end-of-battery-life detection with no calibration required. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Ensures deterministic boot sequence in BCM after cold-cranking voltage dip below 6V. IC Role / Device Role / Timing Role: Resets microcontroller and peripheral ASICs using active-high RESET synchronized to VCC recovery. Use Value: 4.65V ±1.5% reset threshold matches automotive 5V regulator dropout spec; hysteresis prevents retriggering. | Use Scenario: Monitors both +5V logic rail and +12V metering sensor supply in revenue-grade electricity meter. IC Role / Device Role / Timing Role: Dual-supply monitoring via PFI divider and primary VCC reset, with MR for firmware-initiated recalibration reset. Use Value: Single IC replaces two discrete supervisors, reducing BOM count and PCB area in sealed meter housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX707CPA | Same functionality but 0°C to +70°C temperature range; lower max operating temperature | Suitable for commercial-grade equipment without extended thermal requirements | Select MAX707CPA only if ambient operating temperature stays within 0–70°C and cost sensitivity outweighs industrial qualification |
| MAX813LEPA | Includes watchdog timer (1.6s timeout); identical 4.65V reset threshold and −40°C to +85°C rating | Required where software hang detection is mandated (e.g., safety-critical firmware) | Choose MAX813LEPA when system design requires autonomous watchdog supervision in addition to power monitoring |
Compared with MAX707EPA, MAX707CPA lacks extended temperature support but offers lower cost for non-industrial use, while MAX813LEPA adds watchdog capability at same temp grade-making it suitable for designs needing both reset supervision and software fault recovery.
Availability
MAX707EPA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, and automotive body control modules requiring stable component supply across −40°C to +85°C operation.
Supply support for MAX707EPA 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, medical, and communications applications.
The MAX705–MAX708/MAX813L product line delivers cost-optimized microprocessor supervisory circuits with integrated reset, power-fail detection, and manual reset-targeting space-constrained embedded systems needing guaranteed reliability during power transients.
FAQ
What is the reset threshold voltage of the MAX707EPA?
The MAX707EPA has a nominal reset threshold of 4.65V with ±1.5% tolerance over temperature. This value is guaranteed across the full −40°C to +85°C operating range and includes 40mV hysteresis to prevent chatter during slow VCC transitions. The threshold is factory-trimmed and does not require external calibration. The MAX707EPA asserts its active-high RESET output whenever VCC falls below this threshold and holds it until VCC rises above 4.65V + 40mV and the internal 200ms timer expires.
Does the MAX707EPA include a watchdog timer function?
No, the MAX707EPA does not include a watchdog timer. Unlike the MAX705/MAX706/MAX813L variants, the MAX707EPA replaces the watchdog input (WDI) and watchdog output (WDO) pins with an active-high RESET output and a no-connect (N.C.) pin. Its block diagram confirms absence of watchdog circuitry. If watchdog functionality is required, MAX813LEPA is the direct alternative with identical temperature rating and reset threshold.
Can the MAX707EPA monitor a battery voltage below 1.25V?
No-the MAX707EPA's PFI input is referenced to an internal 1.25V comparator threshold and cannot directly monitor voltages below that level. To detect sub-1.25V battery conditions, an external level-shifting circuit (e.g., op-amp inverter or resistor divider with offset) is required. The PFI input's specified range is 0V to VCC, but its effective detection window starts at 1.20V (min) and ends at 1.30V (max) per datasheet electrical characteristics.
What is the minimum supply voltage at which MAX707EPA guarantees RESET output validity?
The MAX707EPA guarantees valid active-high RESET output down to VCC = 1.2V across the full −40°C to +85°C temperature range. At this voltage, RESET remains functional with ISINK = 100μA and VOH ≥ 0.9V (per datasheet Table "RESET Output Voltage" for MAX70_E/M). This enables robust reset assertion during deep brownout or battery backup scenarios where other supervisors fail.
Is the MAX707EPA pin-compatible with other MAX70x devices in PDIP package?
The MAX707EPA shares the same 8-pin PDIP footprint and pinout as MAX705EPA, MAX706EPA, and MAX708EPA, but differs electrically: pin 6 is N.C. (not WDI), and pin 8 is unused (not WDO). While mechanical layout is identical, direct substitution requires verification of RESET polarity (active-high vs. active-low) and absence of watchdog dependency in firmware. MAX707EPA is not functionally interchangeable with MAX705EPA without hardware and software review.
MAX707EPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX707EPA FAQ
1.How can I place an order for MAX707EPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX707EPA 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 MAX707EPA reliable?
The price and inventory of MAX707EPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX707EPA is usually 5 days.
3.What payment methods are accepted for MAX707EPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX707EPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX707EPA?
MAX707EPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX707EPA 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 MAX707EPA?
For technical support, including MAX707EPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX707EPA requirements.
6.How does Aetrix verify that MAX707EPA is sourced from the original manufacturer or authorized distributors?
All MAX707EPA 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 MAX707EPA meets industry standards.
7.What is the process for return or replacement of MAX707EPA?
All MAX707EPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX707EPA, 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 MAX707EPA part is unused and in its original packaging.
Return procedure for MAX707EPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX707EPA 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…
