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Analog Devices Inc./Maxim Integrated MAX698CWE
- Part No.:
- MAX698CWE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX698CWE.pdf
- Description:
- IC SUPERVISOR PWR ON RESET/WATCH
- Quantity:
- Payment:
- Shipping:
Inventory:408
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Product details
Overview
MAX698CWE from Maxim Integrated is a low-cost, single-supply +5V power-on reset and brownout monitor IC with 140ms minimum reset pulse width, 4.65V nominal reset threshold, and 40mV hysteresis-designed for microprocessor systems requiring reliable power-up sequencing in computers and intelligent instruments.
For engineers reviewing the MAX698CWE datasheet, MAX698CWE pinout, MAX698CWE application, or MAX698CWE equivalent, key selection criteria include its 16-pin wide SO package, open-drain RESET output, absence of watchdog functionality (distinguishing it from MAX699 variants), and C-grade temperature range (0°C to +70°C).
Technical Context
The MAX698CWE implements a precision bandgap-based voltage monitor with internal hysteresis to prevent chatter during slow VCC ramps. It asserts an active-low RESET signal when VCC drops below 4.4V and deasserts only after VCC rises above 4.65V, ensuring clean power-up timing.
No watchdog circuitry is present-unlike the MAX699 family-so WDI and WDO pins are unconnected. The device uses no external components and delivers guaranteed 140–500ms reset pulse width across its operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.0V to 5.5V - supports operation down to 3V logic rails while monitoring +5V supply |
| Reset Threshold (Deassert) | 4.65V typical - ensures stable μP startup only after supply reaches valid logic-high margin |
| Reset Threshold (Assert) | 4.4V maximum - triggers reset before supply falls into marginal logic region |
| Hysteresis | 40mV - prevents oscillation during slow or noisy VCC transitions |
| Reset Pulse Width | 140ms minimum - meets Intel-compatible reset timing requirements for x86 and embedded μPs |
| Supply Current | 5mA max - enables use in low-power systems without auxiliary regulation |
| Package | 16-pin wide SO (0.3in) - provides space-efficient layout with dual RESET outputs (active-low and active-high) |
Pinout & Package
MAX698CWE is housed in a 16-lead, 0.3-inch wide SO package (W16-1 outline). Pin functions are validated per Maxim's official pin description table and schematic diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9 | GND | Chip power ground reference for all internal comparators and output drivers |
| 2, 3 | VCC | +5V supply input and sense node - monitors same rail powering the IC |
| 5–8, 10–14 | N.C. | No internal connection - must be left floating or tied to GND per layout best practice |
| 15 | RESET | Active-low open-drain reset output - requires external pull-up for system reset assertion |
| 16 | RESET | Active-high push-pull reset output - directly drives TTL/CMOS inputs without pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitor | Guaranteed 4.4V–4.75V reset window with 40mV hysteresis eliminates need for external resistor dividers |
| Dual RESET outputs | Separate active-low (pin 15) and active-high (pin 16) outputs simplify interface to diverse logic families |
| Zero-component design | Operates without external capacitors, resistors, or trimming - reduces BOM count and board area |
| 140ms minimum reset pulse | Ensures full μP initialization before release - exceeds industry-standard 100ms requirement |
Applications
| Computers | Controllers |
|---|---|
Use Scenario: Desktop and embedded PC motherboards requiring deterministic power-on reset timing after AC power restoration. IC Role / Device Role: Primary power-good monitor and reset generator for x86 or ARM-based CPU subsystems. Use Value: Eliminates discrete RC reset circuits while guaranteeing ≥140ms reset hold time compliant with BIOS/UEFI specifications. | Use Scenario: Industrial PLC mainboards where supply transients during relay switching must not cause spurious resets. IC Role / Device Role: Dedicated +5V brownout detector with hysteresis to suppress false triggers on noisy 5V rails. Use Value: 40mV hysteresis prevents reset reassertion during brief dips, improving system uptime in electrically harsh environments. |
| Intelligent Instruments | Critical μP Power Monitoring |
Use Scenario: Portable test equipment (e.g., DMMs, oscilloscopes) powered from battery-backed +5V regulators. IC Role / Device Role: Low-quiescent-current supervisor ensuring μP remains held in reset until regulated supply stabilizes. Use Value: 5mA max supply current extends battery life; 3.0–5.5V operating range accommodates aging or partially discharged batteries. | Use Scenario: Medical diagnostic devices where unintended μP reboot could interrupt critical data acquisition. IC Role / Device Role: Fail-safe reset controller with guaranteed minimum pulse width and tight threshold tolerance. Use Value: 4.65V deassertion threshold ensures reset release only after supply fully recovers - preventing partial initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-on reset monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX698CPA | Identical electrical specs but in 8-pin PDIP package - lacks active-high RESET output (pin 16) | Suitable only where board space permits DIP and dual-reset signaling is unnecessary | Select MAX698CPA if through-hole assembly is required and only active-low reset is needed |
| TPS3808G125DBVR | Lower quiescent current (1.8μA), adjustable reset threshold (1.25V), but requires external resistor divider and capacitor | Better for ultra-low-power battery systems; less suitable for cost-sensitive fixed-threshold designs | Choose TPS3808G125DBVR only when programmable threshold and nanoamp supply current outweigh added BOM complexity |
Compared with MAX698CPA, MAX698CWE offers dual RESET polarity in surface-mount form; compared with TPS3808G125DBVR, it delivers plug-and-play operation at higher supply current but zero external component count.
Availability
MAX698CWE is available at Aetrix Electronics and suitable for computers, controllers, intelligent instruments, and critical μP power monitoring applications requiring stable component supply across industrial and commercial production cycles.
Supply support for MAX698CWE 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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX698/MAX699 product line was designed specifically for cost-sensitive, high-reliability power-on reset and brownout supervision in microprocessor-based systems without external components.
FAQ
Does the MAX698CWE include a watchdog timer function?
No, the MAX698CWE does not include a watchdog timer. Unlike the MAX699CWE, it lacks WDI and WDO pins and associated circuitry. The MAX698CWE is strictly a voltage-monitoring reset controller. If watchdog functionality is required, the MAX699CWE or MAX699EWE must be selected instead. All MAX698 variants-including MAX698CWE-are defined in the datasheet as non-watchdog members of the family.
What is the purpose of having two RESET outputs on the MAX698CWE?
The MAX698CWE provides both active-low (pin 15) and active-high (pin 16) RESET outputs to interface directly with different logic families without level-shifting. The active-low output is open-drain and requires an external pull-up; the active-high output is push-pull and drives CMOS/TTL loads directly. This dual-output architecture simplifies design in systems where multiple subsystems expect opposite reset polarities - such as legacy peripherals and modern processors on the same board.
Can the MAX698CWE operate from a 3.3V supply?
No, the MAX698CWE is specified to monitor and operate from a +5V supply rail. Its operating voltage range is 3.0V to 5.5V, but the internal reference and reset thresholds (e.g., 4.65V deassertion) are calibrated for +5V systems. Using it on a 3.3V rail would result in continuous reset assertion, as VCC would remain below the 4.4V minimum threshold. For 3.3V systems, consider dedicated 3.3V supervisors like the MAX6326 or TPS3808G01.
Is the MAX698CWE RoHS-compliant and lead-free?
Yes, the MAX698CWE is available in lead(Pb)-free packaging. Per Maxim's ordering information, lead-free versions are denoted by adding a "+" symbol at the end of the part number (e.g., MAX698CWE+). Standard MAX698CWE shipments from Aetrix Electronics comply with RoHS Directive 2011/65/EU and are manufactured using matte-tin lead finishes with no lead content exceeding 0.1% by weight.
How does the MAX698CWE handle brownout conditions?
The MAX698CWE detects brownout conditions by continuously comparing VCC against an internal precision reference. When VCC falls below 4.4V, it asserts RESET within microseconds. The 40mV hysteresis ensures RESET remains asserted until VCC rises above 4.65V, preventing chatter during slow or noisy supply recovery. This behavior is fully specified over the 0°C to +70°C range and requires no external components - making it ideal for robust brownout protection in industrial and computing applications.
MAX698CWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX698CWE FAQ
1.How can I place an order for MAX698CWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX698CWE 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 MAX698CWE reliable?
The price and inventory of MAX698CWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX698CWE is usually 5 days.
3.What payment methods are accepted for MAX698CWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX698CWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX698CWE?
MAX698CWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX698CWE 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 MAX698CWE?
For technical support, including MAX698CWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX698CWE requirements.
6.How does Aetrix verify that MAX698CWE is sourced from the original manufacturer or authorized distributors?
All MAX698CWE 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 MAX698CWE meets industry standards.
7.What is the process for return or replacement of MAX698CWE?
All MAX698CWE units undergo pre-shipment inspection (PSI). If there is an issue with MAX698CWE, 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 MAX698CWE part is unused and in its original packaging.
Return procedure for MAX698CWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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