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Analog Devices Inc./Maxim Integrated MAX702ESA+T
- Part No.:
- MAX702ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX702ESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
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Product details
Overview
MAX702ESA+T from Maxim Integrated is a precision power-supply supervisory circuit designed to monitor +5V microprocessor power rails and assert a reset signal when VCC drops below 4.65V. It features a debounced manual-reset input (MR), guaranteed valid RESET output down to 1V VCC, 200ms minimum reset pulse width, and operates across –40°C to +85°C in an 8-pin narrow-SO package. It is used in embedded controllers requiring reliable power-on and brownout reset.
For engineers reviewing the MAX702ESA+T datasheet, MAX702ESA+T pinout, MAX702ESA+T application, or MAX702ESA+T equivalent, key selection criteria include its fixed 4.65V threshold, MR debouncing capability, extended temperature range, SO-8 packaging, and compatibility with 5V digital systems without external components.
Technical Context
The MAX702ESA+T implements a single-voltage monitoring function using an internal bandgap reference and comparator to detect VCC falling below 4.65V. Its RESET output is active-low and guaranteed functional down to 1V supply, enabling robust reset assertion during deep brownout conditions.
It includes a debounced MR input with internal 5µA pullup and logic-level sensitivity (0.7V threshold), eliminating external RC networks. Unlike the MAX700/MAX701, it lacks RESET and adjustable sensing - confirming its role as the minimal-feature variant optimized for cost-sensitive 5V-only applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV - factory-trimmed for stable operation in +5V systems without calibration. |
| Reset Pulse Width | 200–500ms - ensures sufficient duration to fully initialize microprocessors after power-up or brownout recovery. | Supply Voltage Range | 1V to 15.5V - supports valid reset assertion even during severe undervoltage conditions. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating. |
| Supply Current | 100–200µA - enables low-power system monitoring without significant load on supply rail. |
| MR Input Threshold | 0.7V - compatible with standard TTL/CMOS logic outputs for pushbutton or processor-driven reset control. |
Pinout & Package
MAX702ESA+T is housed in an 8-pin narrow-SO (SOIC-8) package with 1.27mm pitch, RoHS-compliant, lead-free construction indicated by the "+" suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Debounced active-low input with internal 5µA pullup; asserts RESET when pulled below 0.7V. |
| 2 GND | Ground Reference | Primary return path for internal comparators and output drivers; must be connected to system ground plane. |
| 3 RESET | Active-Low Reset Output | Open-drain output sinking up to 3.2mA at 4.25V; requires external pullup for µP reset line interface. |
| 4 N.C. | No Connection | Internally unconnected; must remain floating or tied to GND per layout guidelines - no routing required. |
| 5 N.C. | No Connection | Internally unconnected; no electrical function - leave unconnected on PCB. |
| 6 N.C. | No Connection | Internally unconnected; not bonded out - no trace or pad needed beyond footprint. |
| 7 VCC | Power Supply Input | +5V supply input and monitored voltage source; accepts 1V–15.5V with full reset functionality. |
| 8 N.C. | No Connection | Internally unconnected; unused pin - no connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.65V reset threshold | Factory-trimmed for ±150mV accuracy across –40°C to +85°C, eliminating external resistor networks in 5V systems. |
| Debounced MR input | Internal hardware debounce removes contact bounce from mechanical pushbuttons, avoiding spurious resets without external RC. |
| 200ms minimum reset pulse | Guaranteed minimum duration ensures complete microprocessor initialization before release, even under slow-rising VCC. |
| Valid reset down to 1V VCC | Enables reliable reset assertion during deep brownout or battery sag, supporting fail-safe shutdown in critical systems. |
| Lead-free narrow-SO package | RoHS-compliant 8-pin SOIC with 1.27mm pitch, compatible with standard reflow profiles and automated assembly. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
|
Use Scenario: Power sequencing and brownout detection in programmable logic controller modules operating in factory-floor environments with fluctuating 5V supplies. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt CPU execution until stable 5V rail is confirmed. Use Value: Prevents corrupted firmware execution during undervoltage events, leveraging 200ms pulse width and 1V-valid reset to ensure deterministic recovery. |
Use Scenario: Ensuring safe boot and fault recovery in portable ultrasound or ECG units powered from regulated 5V DC-DC converters. IC Role / Device Role / Timing Role: Primary power-good monitor triggering controlled reset of ARM-based SoC upon supply dip or battery discharge. Use Value: Fixed 4.65V threshold aligns precisely with 5V system tolerance, while MR debouncing allows clean user-initiated recalibration without software intervention. |
| Telecom Remote Terminal Unit | Automated Test Equipment (ATE) |
|
Use Scenario: Monitoring auxiliary 5V rails in outdoor telecom RTUs exposed to wide ambient temperature swings (–40°C to +85°C). IC Role / Device Role / Timing Role: Standalone reset generator interfacing directly to FPGA configuration logic via open-drain RESET output. Use Value: Extended temperature qualification and 100–200µA quiescent current minimize thermal drift and self-heating impact on timing accuracy. |
Use Scenario: Providing deterministic power-on reset for high-speed digital pattern generators where supply stability affects test repeatability. IC Role / Device Role / Timing Role: System-level supervisor ensuring µP and FPGA are held in reset until all 5V domains settle within specification. Use Value: Guaranteed 200ms pulse width exceeds typical FPGA configuration time, preventing partial initialization and bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G01DBVR | Adjustable threshold (0.4–5.5V) via external resistor divider; 200ms fixed delay; higher quiescent current (1.1µA min). | Supports multi-rail monitoring and non-5V systems; less suitable for cost-optimized fixed-threshold designs. | Select when flexible voltage monitoring or tighter threshold tolerance (<±0.5%) is required over cost and simplicity. |
| ADM6710LAKSZ-REEL7 | Fixed 4.63V threshold; 200ms reset timeout; lower max supply voltage (6.5V); no MR debouncing. | Lacks integrated MR debounce - requires external RC network for pushbutton use; limited to ≤6.5V VCC. | Choose only if MR input is unused and supply stays strictly within 4.5–6.5V; otherwise MAX702ESA+T offers broader VCC range and MR integration. |
Compared with TPS3808G01DBVR and ADM6710LAKSZ-REEL7, MAX702ESA+T delivers optimal balance of fixed-threshold precision, MR debouncing, 1V–15.5V VCC support, and industrial temperature range - making it ideal for cost-sensitive, 5V-only embedded systems where external component count must be minimized.
Availability
MAX702ESA+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom remote terminal units, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX702ESA+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) is a semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX700/MAX701/MAX702 family was designed specifically for low-cost, high-reliability power-supply supervision in 5V microprocessor systems - prioritizing simplicity, guaranteed reset timing, and minimal external component count.
FAQ
What is the reset threshold voltage of the MAX702ESA+T?
The MAX702ESA+T has a factory-trimmed reset threshold of 4.65V, with a guaranteed tolerance of ±150mV across its full operating temperature range (–40°C to +85°C). This value applies to both power-up and power-down conditions, ensuring consistent behavior during supply ramp-up and brownout events. The MAX702ESA+T does not support adjustable thresholds - unlike the MAX700 - making it purpose-built for fixed 5V system monitoring.
Does the MAX702ESA+T provide a manual reset input, and is it debounced?
Yes, the MAX702ESA+T includes a dedicated MR (Manual Reset) input on Pin 1 that is internally debounced, eliminating the need for external RC filtering. The MR input has a 0.7V logic threshold and an internal 5µA pullup current. When pulled low, it immediately asserts the active-low RESET output for a minimum of 200ms, regardless of VCC level. This feature is integral to the MAX702ESA+T design and distinguishes it from simpler reset monitors lacking hardware debounce.
What is the minimum supply voltage at which the MAX702ESA+T guarantees correct RESET output state?
The MAX702ESA+T guarantees correct RESET output state - i.e., valid logic levels and proper assertion timing - for VCC voltages as low as +1V. This is explicitly specified in the Absolute Maximum Ratings and Electrical Characteristics tables, and verified down to 0V in Figure 4 of the datasheet. This capability ensures reliable reset assertion during deep brownout or battery-sag conditions, a key reliability feature of the MAX702ESA+T.
What package type and RoHS status does the MAX702ESA+T use?
The MAX702ESA+T uses an 8-pin narrow-SO (SOIC-8) package with 1.27mm lead pitch and is RoHS-compliant and lead-free, as indicated by the "+" suffix in the part number. The "ESA" prefix denotes the extended temperature grade (–40°C to +85°C), and the package outline conforms to Maxim's S8+4 land pattern (outline 21-0041). No leaded version is available for this specific suffix.
Can the MAX702ESA+T monitor voltages other than +5V?
No, the MAX702ESA+T is designed exclusively for monitoring +5V supplies via its internal VCC-sensing path. It lacks the CTL, SENSE, and HYST pins found on the MAX700, and therefore cannot be configured for external voltage monitoring or adjustable thresholds. Its reset function is hardwired to trigger at 4.65V on VCC - a deliberate simplification that defines the MAX702ESA+T's role as the minimal-feature member of the MAX700 family.
MAX702ESA+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, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX702ESA+T FAQ
1.How can I place an order for MAX702ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX702ESA+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 MAX702ESA+T reliable?
The price and inventory of MAX702ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX702ESA+T is usually 5 days.
3.What payment methods are accepted for MAX702ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX702ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX702ESA+T?
MAX702ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX702ESA+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 MAX702ESA+T?
For technical support, including MAX702ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX702ESA+T requirements.
6.How does Aetrix verify that MAX702ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX702ESA+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 MAX702ESA+T meets industry standards.
7.What is the process for return or replacement of MAX702ESA+T?
All MAX702ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX702ESA+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 MAX702ESA+T part is unused and in its original packaging.
Return procedure for MAX702ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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