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Analog Devices Inc./Maxim Integrated MAX700ESA+
- Part No.:
- MAX700ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX700ESA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,884
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Product details
Overview
MAX700ESA+ from Maxim Integrated is a precision power-supply supervisory circuit designed to monitor +5V systems and generate reliable reset signals during power-up, power-down, and brownout conditions. It features factory-trimmed 4.65V reset threshold, ≥200ms reset pulse width, adjustable voltage detection via SENSE input (1.29V reference), adjustable hysteresis, and debounced manual-reset input - all in an 8-pin narrow-SO package rated for -40°C to +85°C operation.
For engineers reviewing the MAX700ESA+ datasheet, MAX700ESA+ pinout, MAX700ESA+ application, or MAX700ESA+ equivalent, key selection criteria include its dual-mode monitoring (VCC or external SENSE), guaranteed reset assertion down to VCC = 1V, ±150mV threshold accuracy over temperature, and compatibility with microprocessor-based industrial controllers requiring robust power-fail detection.
Technical Context
The MAX700ESA+ implements a comparator-based supervision architecture with internal 1.29V reference and configurable control logic via the CTL pin. When CTL = GND, it monitors VCC directly at 4.65V; when CTL = VCC, it switches to SENSE input with 1.29V threshold, enabling custom voltage detection using external resistor dividers.
Hysteresis is programmable via the HYST pin (typical on-resistance 1kΩ to GND), reducing noise-induced false resets. The device guarantees valid RESET/RESET outputs for VCC ≥ 1V and delivers a minimum 200ms active-low reset pulse after VCC stabilizes, meeting critical µP boot sequencing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV over -40°C to +85°C - ensures consistent power-fail detection across industrial temperature range |
| Reset Pulse Width | 200–500ms - meets µP minimum reset hold-time requirements without external timing components |
| Supply Voltage Range | VCC = -0.3V to +15.5V - supports operation with up to 15V supplies and tolerates reverse-bias transients |
| SENSE Input Threshold | 1.29V ±40mV - enables precise external voltage monitoring via resistor divider scaling |
| Quiescent Current | 100–200µA - enables low-power system monitoring without significant battery drain |
| Manual Reset Input | Debounced MR with 5µA internal pullup - eliminates need for external RC debounce network |
| Operating Temp Range | -40°C to +85°C - qualified for extended-temperature industrial and embedded applications |
Pinout & Package
MAX700ESA+ is housed in an 8-pin narrow-SO (SOIC-8) package with 1.27mm pitch, RoHS-compliant lead-free finish (indicated by '+' suffix), and JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Active-low debounced input with internal 5µA pullup; initiates reset when pulled below 0.7V |
| 2 SENSE | Voltage Sense Input | 1.29V comparator input used for external voltage monitoring when CTL = VCC |
| 3 HYST | Hysteresis Control | Switched 1kΩ-to-GND path activated 5µs before reset; sets hysteresis width via external resistor |
| 4 GND | Ground Reference | Primary return path for internal comparators, reference, and output drivers |
| 5 RESET | Active-Low Reset Output | Open-drain output sinking up to 16mA; requires external pullup for µP reset line |
| 6 RESET | Active-High Reset Output | Push-pull output sourcing up to 3.2mA; directly drives µP reset pins requiring high-active signal |
| 7 CTL | Control Mode Select | Configures monitoring mode: GND = VCC monitoring; VCC = SENSE monitoring |
| 8 VCC | Supply Input | +5V supply input and internal VCC sense node; supports operation up to +15.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual Monitoring Modes | Selectable VCC or external SENSE monitoring via CTL pin - enables flexible voltage detection without redesign |
| Adjustable Hysteresis | HYST pin provides user-programmable hysteresis - suppresses noise-induced resets in noisy power environments |
| Guaranteed Low-Voltage Reset | Valid RESET output asserted for VCC ≥ 1V - ensures µP remains held in reset until stable supply is established |
| No External Timing Components | Internal RC timing generates ≥200ms reset pulse - eliminates BOM cost and layout area for external capacitor |
| Industrial Temperature Rating | -40°C to +85°C operation - supports deployment in harsh environments without derating |
Applications
| Industrial PLC Power Monitoring | Medical Instrument Boot Supervision |
|---|---|
Use Scenario: Programmable logic controller power rails experience transient dips during relay switching or motor startup. IC Role / Device Role / Timing Role: MAX700ESA+ continuously monitors 5V logic supply and asserts RESET if voltage falls below 4.65V for >200ms. Use Value: Prevents PLC firmware corruption by holding CPU in reset until supply recovers fully, eliminating spurious reboots. | Use Scenario: Portable diagnostic equipment powers up from battery and must validate regulated 5V rail before initializing ADC and display subsystems. IC Role / Device Role / Timing Role: MAX700ESA+ provides synchronized active-low and active-high reset signals to coordinate µP, memory, and peripheral initialization. Use Value: Ensures deterministic boot sequence with no race conditions between power stabilization and firmware execution. |
| Telecom Line Card Voltage Verification | Automotive Infotainment Module Reset Control |
Use Scenario: Telecom line cards receive multiple DC inputs (3.3V, 5V, 12V); 5V logic rail must be validated before FPGA configuration. IC Role / Device Role / Timing Role: MAX700ESA+ monitors 5V rail using internal threshold; SENSE pin unused (CTL = GND). Use Value: Eliminates need for external resistor divider and reference IC, reducing component count and board space. | Use Scenario: Infotainment head unit operates in vehicle environment where cold-cranking causes 5V rail collapse to 3.5V for 50ms. IC Role / Device Role / Timing Role: MAX700ESA+ detects brownout and extends reset pulse beyond 200ms to cover full dip duration. Use Value: Guarantees microcontroller remains held in reset throughout entire undervoltage event, preventing partial initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V reset threshold; no SENSE/HYST pins; 200ms fixed delay; 1.8–6V supply range | Limited to single-voltage monitoring; lacks adjustable hysteresis and dual reset outputs | Choose for cost-sensitive 3.3V-only designs where external voltage scaling is unnecessary |
| ADM6315-46ARTZ-RL | 4.63V threshold; open-drain RESET only; no manual reset or hysteresis adjustment; 240ms min pulse | Simpler feature set; no SENSE input or CTL mode select; not suitable for multi-rail or noise-prone systems | Choose for basic reset generation where design constraints prohibit extra pins or complexity |
Compared with TPS3808G33DBVR and ADM6315-46ARTZ-RL, the MAX700ESA+ uniquely supports both VCC and external SENSE monitoring, offers user-adjustable hysteresis, and provides complementary RESET/RESET outputs - making it optimal for industrial systems requiring flexible, noise-immune power supervision.
Availability
MAX700ESA+ is available at Aetrix Electronics and suitable for industrial PLCs, medical instruments, telecom line cards, and automotive infotainment modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX700ESA+ 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 MAX700ESA+ belongs to the MAX700/MAX701/MAX702 supervisory family, engineered specifically for robust power-fail detection and reset generation in microprocessor-based systems operating under variable or noisy supply conditions.
FAQ
What is the function of the CTL pin on the MAX700ESA+?
The CTL pin on the MAX700ESA+ selects the voltage monitoring source: when tied to GND, the device monitors VCC internally at 4.65V; when tied to VCC, it monitors the SENSE pin at 1.29V, enabling custom threshold setting via external resistors. This dual-mode capability allows one device to serve multiple rail-monitoring needs without redesigning the supervisor circuit.
Does the MAX700ESA+ require external components to generate its reset pulse?
No, the MAX700ESA+ does not require external components to generate its reset pulse. Its internal RC timing network guarantees a minimum 200ms active reset pulse width during power-up, power-down, and brownout events. This eliminates the need for external capacitors or resistors typically required in discrete reset circuits, simplifying design and improving reliability.
Can the MAX700ESA+ monitor voltages other than +5V?
Yes, the MAX700ESA+ can monitor voltages other than +5V using its SENSE input. When CTL = VCC, the internal 1.29V reference compares against the divided-down external voltage applied to SENSE. For example, a resistor divider scaling a 12V rail to 1.29V enables precise 12V supervision - extending the MAX700ESA+'s utility beyond standard +5V systems.
What is the purpose of the HYST pin on the MAX700ESA+?
The HYST pin on the MAX700ESA+ provides user-adjustable hysteresis to prevent noise-induced false resets. When enabled (CTL = VCC), HYST connects a ~1kΩ switch to GND 5µs before reset activation. Adding an external resistor between HYST and VCC sets the hysteresis voltage gap, ensuring clean transitions during marginal supply conditions - a critical feature in electrically noisy industrial environments.
How does the MAX700ESA+ ensure reliable reset assertion at low VCC?
The MAX700ESA+ guarantees valid RESET/RESET outputs for VCC as low as 1V, verified across -40°C to +85°C. Its internal bandgap reference and comparator remain functional down to this level, ensuring the microprocessor stays held in reset until the supply reaches a stable operating point - preventing erratic behavior or data corruption during deep brownouts.
MAX700ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX700ESA+ FAQ
1.How can I place an order for MAX700ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX700ESA+ 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 MAX700ESA+ reliable?
The price and inventory of MAX700ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX700ESA+ is usually 5 days.
3.What payment methods are accepted for MAX700ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX700ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX700ESA+?
MAX700ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX700ESA+ 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 MAX700ESA+?
For technical support, including MAX700ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX700ESA+ requirements.
6.How does Aetrix verify that MAX700ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX700ESA+ 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 MAX700ESA+ meets industry standards.
7.What is the process for return or replacement of MAX700ESA+?
All MAX700ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX700ESA+, 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 MAX700ESA+ part is unused and in its original packaging.
Return procedure for MAX700ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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