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Analog Devices Inc./Maxim Integrated MAX698EPA+
- Part No.:
- MAX698EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX698EPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,507
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Product details
Overview
The MAX698EPA+ from Maxim Integrated is an industrial-grade, 8-pin PDIP power-on reset and voltage monitor IC for +5V microprocessor systems. It delivers a guaranteed 140ms minimum RESET pulse on power-up, brownout (assertion at 4.4V, deassertion at 4.65V), and power-down, with ±40mV hysteresis and 3.0V–5.5V operating voltage range. It operates across –40°C to +85°C and requires zero external components.
For engineers reviewing the MAX698EPA+ datasheet, MAX698EPA+ pinout, MAX698EPA+ application, or MAX698EPA+ equivalent, key selection criteria include its fixed 4.65V reset threshold, open-drain RESET output (0.4V low @ 1.6mA), 5mA supply current, industrial temperature rating, and absence of watchdog functionality-distinguishing it from the MAX699 series.
Technical Context
The MAX698EPA+ implements a precision bandgap-based voltage comparator with internal hysteresis to detect +5V supply deviations. Its reset timer is monolithic and unadjustable, guaranteeing ≥140ms assertion and ≤500ms maximum pulse width without external RC networks.
No watchdog circuitry is present-unlike the MAX699-so it lacks WDI input, WDO output, or timeout supervision. The device uses dual VCC pins (pins 1 & 2) and triple GND pins (pins 3, 4, & 7) for noise immunity and low-impedance grounding in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V (deassertion); ensures stable μP boot only after +5V rail settles within tolerance |
| Hysteresis | 40mV; prevents oscillatory reset during slow or noisy VCC recovery |
| Reset Pulse Width | 140–500ms; guarantees sufficient hold time for full processor initialization |
| Supply Voltage Range | 3.0V–5.5V; supports operation during brownout and post-regulator dropout |
| RESET Output Type | Open-drain; allows wired-OR configuration and level translation with external pull-up |
| Supply Current | 5mA max; enables low-overhead integration into power-constrained embedded systems |
| Operating Temp | –40°C to +85°C; qualified for industrial control, instrumentation, and factory automation |
Pinout & Package
MAX698EPA+ is housed in an 8-lead plastic dual-inline package (PDIP) with 0.3-inch width, RoHS-compliant (indicated by '+' suffix), and standard through-hole mounting. Pin 1 is top-left corner with notch orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | VCC | +5V supply sense input and IC power rail; dual pins reduce IR drop and improve noise rejection |
| 3, 4, 7 | GND | Chip power ground; three dedicated pins enhance grounding integrity in noisy environments |
| 5, 6 | RESET | Active-low open-drain reset output; sinks 1.6mA at 0.4V, requires external pull-up |
| 8 | N.C. | No connection; must remain unconnected per design-no internal function or tie-off required |
Key Features
| Feature | Design Value |
|---|---|
| Precision Reset Threshold | Factory-trimmed 4.65V with ±150mV total accuracy over temperature and supply, eliminating manual calibration |
| Fixed Reset Timeout | Guaranteed ≥140ms pulse ensures compatibility with legacy μP reset timing requirements without external timing components |
| Zero-External-Component Design | Integrates voltage reference, comparator, timer, and driver-reduces BOM count, PCB area, and qualification effort |
| Industrial Temperature Range | –40°C to +85°C operation validated per JEDEC JESD22-A108, supporting deployment in harsh environments |
Applications
| Programmable Logic Controllers (PLCs) | Industrial Data Acquisition Systems |
|---|---|
Use Scenario: Power cycling during factory floor voltage sags or EMI-induced rail droop. IC Role / Device Role / Timing Role: Primary power-fail detector and hard reset initiator for ARM Cortex-M or 8051-based controller modules. Use Value: Prevents firmware corruption by enforcing 140ms minimum reset hold time before CPU release, independent of external timing elements. | Use Scenario: Cold junction compensation module powered from isolated +5V DC/DC converter. IC Role / Device Role / Timing Role: Supply monitor ensuring ADC and sensor interface ICs initialize only after stable +5V rail establishment. Use Value: 40mV hysteresis avoids chatter during marginal 4.6V–4.7V transitions common in low-efficiency isolated supplies. |
| Medical Diagnostic Equipment | Building Automation Controllers |
Use Scenario: Standby-to-active transition in portable ultrasound front-end subsystems. IC Role / Device Role / Timing Role: Single-point reset supervisor for FPGA configuration and analog signal chain power sequencing. Use Value: Guaranteed 3.0V–5.5V operating range accommodates battery-backed +5V rails that dip to 4.2V under load. | Use Scenario: HVAC zone controllers exposed to wide ambient temperature swings (-25°C to +70°C). IC Role / Device Role / Timing Role: Temperature-hardened reset generator for PIC or MSP430 microcontrollers. Use Value: –40°C to +85°C rating ensures reliable reset assertion even during winter startup in unheated mechanical rooms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX699EPA+ | Includes watchdog input (WDI) and same reset specs; adds 1s timeout supervision capability | Required where μP activity monitoring is mandated (e.g., safety-critical firmware validation) | Select MAX699EPA+ only if watchdog functionality is needed; MAX698EPA+ offers lower cost and simpler layout |
| TPS3808G33DBVR | Adjustable reset threshold (via resistor divider); 3.3V nominal supply; 200ms min reset pulse | Suitable for 3.3V systems or designs requiring programmable trip points | Choose TPS3808G33DBVR for 3.3V domains or when threshold flexibility outweighs fixed-voltage simplicity |
Compared with MAX699EPA+, MAX698EPA+ eliminates watchdog overhead and reduces system complexity; versus TPS3808G33DBVR, it provides tighter 4.65V accuracy and industrial temperature support without external resistors-ideal for cost-sensitive, fixed +5V μP reset applications.
Availability
MAX698EPA+ is available at Aetrix Electronics and suitable for industrial controllers, medical diagnostic equipment, and building automation systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX698EPA+ 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 MAX698/MAX699 product line delivers low-cost, single-chip power-on reset and supervisory solutions targeting microprocessor-based systems needing reliable, no-component reset generation in space- and cost-constrained designs.
FAQ
What is the reset threshold voltage of the MAX698EPA+?
The MAX698EPA+ has a fixed power-up reset deassertion threshold of 4.65V (typical) with ±150mV total variation over temperature and supply. It asserts reset below 4.4V and includes 40mV hysteresis to prevent chatter during rail recovery. This threshold is factory-trimmed and requires no external components.
Does the MAX698EPA+ include a watchdog timer?
No, the MAX698EPA+ does not include a watchdog timer. Watchdog functionality is exclusive to the MAX699 series. The MAX698EPA+ provides only power-on reset, brownout detection, and power-down reset-making it simpler and lower-cost for applications where μP activity supervision is unnecessary.
What package type and lead finish does the MAX698EPA+ use?
The MAX698EPA+ is supplied in an 8-lead plastic dual-inline package (PDIP) with 0.3-inch width. The '+' suffix indicates RoHS-compliant, lead(Pb)-free packaging. It features three GND pins and dual VCC pins for improved noise immunity and thermal performance in industrial layouts.
Can the MAX698EPA+ be used in a 3.3V system?
The MAX698EPA+ is specified for +5V supply monitoring and operates from 3.0V to 5.5V, but its reset threshold is fixed at 4.65V. In a 3.3V system, it will assert reset continuously since VCC never reaches the trip point. For 3.3V applications, consider alternatives like the TPS3808G33DBVR with adjustable threshold.
What is the maximum reset pulse width of the MAX698EPA+?
The MAX698EPA+ guarantees a minimum reset pulse width of 140ms and specifies a maximum of 500ms under all operating conditions. This wide window ensures compatibility with diverse microprocessors-including those requiring longer reset hold times-without external timing components.
MAX698EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX698EPA+ FAQ
1.How can I place an order for MAX698EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX698EPA+ 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 MAX698EPA+ reliable?
The price and inventory of MAX698EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX698EPA+ is usually 5 days.
3.What payment methods are accepted for MAX698EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX698EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX698EPA+?
MAX698EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX698EPA+ 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 MAX698EPA+?
For technical support, including MAX698EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX698EPA+ requirements.
6.How does Aetrix verify that MAX698EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX698EPA+ 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 MAX698EPA+ meets industry standards.
7.What is the process for return or replacement of MAX698EPA+?
All MAX698EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX698EPA+, 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 MAX698EPA+ part is unused and in its original packaging.
Return procedure for MAX698EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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