My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX699EWE+
- Part No.:
- MAX699EWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX699EWE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,224
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX699EWE+ from Maxim Integrated is an industrial-grade, low-cost power-on reset and watchdog controller for +5V microprocessor systems. It delivers a guaranteed 140ms RESET pulse on power-up, brownout (trip at 4.4V), and power-down, features a 1s watchdog timeout with WDI input, and operates across -40°C to +85°C in a 16-pin wide SO package.
For engineers reviewing the MAX699EWE+ datasheet, MAX699EWE+ pinout, MAX699EWE+ application, or MAX699EWE+ equivalent, key selection criteria include its open-drain RESET output, WDO assertion behavior during watchdog timeout, VCC monitoring hysteresis of 40mV, and compatibility with legacy 8-pin designs via pin-mapped SO footprint.
Technical Context
The MAX699EWE+ integrates a precision voltage monitor with fixed 4.65V power-up reset deassertion threshold and 40mV hysteresis to prevent chatter near trip point. Its internal reset timer guarantees ≥140ms pulse width, independent of supply ramp rate up to 100V/μs.
The watchdog circuit monitors WDI toggling with a nominal 1s timeout; unconnected WDI disables watchdog functionality. In SO packages, it provides both active-low RESET and active-low WDO outputs-neither available in PDIP variants-enabling dual-fault signaling in critical embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.0V to 5.5V - supports operation down to 3V logic while monitoring +5V rail |
| Reset Threshold (Power-Up) | 4.65V (typ) - ensures stable μP initialization after VCC crosses reliable operating level |
| Reset Pulse Width | 140ms to 500ms - meets Intel-compatible reset timing requirements without external RC |
| Watchdog Timeout | 1s (nominal) - detects stalled firmware execution within defined safety interval |
| Hysteresis | 40mV - prevents oscillation during slow or noisy VCC recovery |
| Supply Current | 5mA (max) - enables use in low-power supervisory roles without burdening supply |
| Output Drive (RESET) | 0.4V @ 1.6mA sink - ensures solid TTL/CMOS-compatible low-level drive into typical pull-up loads |
Pinout & Package
MAX699EWE+ is housed in a 16-lead, 0.3-inch wide SOIC package (W16-1 outline), RoHS-compliant with lead-free finish indicated by the '+' suffix. Pin 1 is top-left corner, with standard SOIC orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9 | GND | Chip power ground reference for all internal comparators and outputs |
| 2, 3 | VCC | +5V supply sense input and IC power rail - dual connection improves noise immunity |
| 5–8, 10–14 | N.C. | No internal connection - must remain unconnected per datasheet |
| 11 | WDI | Watchdog input - three-level (high/mid/low); open = watchdog disabled |
| 14 | WDO | Watchdog output - active-low open-drain signal asserted when WDI stalls >1s |
| 15 | RESET | Active-low reset output - asserted when VCC < 4.4V, deasserted at 4.65V |
| 16 | RESET | Active-high reset output - complementary to pin 15, only on SO packages |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power-On Reset Timer | Guaranteed 140ms minimum pulse eliminates need for external RC timing network |
| Dual-Output RESET Signaling | SO package provides both active-low and active-high RESET outputs for flexible interface design |
| Configurable Watchdog | WDI pin accepts high/mid/low states; floating WDI disables watchdog - no external pull-up required |
| Precision Voltage Monitoring | 4.65V ±150mV trip threshold with 40mV hysteresis ensures robust brownout detection |
| Industrial Temperature Range | -40°C to +85°C operation validated per E-grade specification - suitable for harsh environments |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
Use Scenario: Supervising ARM Cortex-M7-based control modules in programmable logic controllers subject to voltage sags and EMI. IC Role / Device Role / Timing Role: Primary power-on reset generator and watchdog supervisor ensuring deterministic boot and runtime fault detection. Use Value: Prevents spurious resets during transient dips with 40mV hysteresis and guarantees 140ms reset hold time for full processor initialization. | Use Scenario: Monitoring power integrity in portable ultrasound imaging units with battery-backed +5V rails. IC Role / Device Role / Timing Role: Dual-output reset supervisor providing both active-low and active-high signals to FPGA and analog front-end ASICs. Use Value: Enables simultaneous reset assertion across mixed-voltage subsystems using pin 15 (RESET) and pin 16 (RESET). |
| Telecom Base Station Management | Automated Test Equipment (ATE) |
Use Scenario: Ensuring reliable restart of field-programmable gate arrays in remote radio head controllers after AC line interruptions. IC Role / Device Role / Timing Role: Watchdog-enabled reset controller detecting firmware lockups during RF calibration sequences. Use Value: 1s watchdog timeout (pin 11 WDI) triggers fail-safe shutdown before corrupted data propagates to baseband processors. | Use Scenario: Power sequencing and fault monitoring in modular PXI chassis with multiple hot-swappable instrument cards. IC Role / Device Role / Timing Role: Centralized reset arbiter asserting synchronized reset pulses across card slots upon main +5V rail instability. Use Value: Open-drain RESET output (pin 15) allows wired-OR configuration with other supervisors in multi-rail systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-on reset and watchdog applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX699CPA+ | Same core functionality but rated for 0°C to +70°C only; 8-pin PDIP package limits output options (no WDO or active-high RESET) | Suitable for commercial-grade board-level designs where temperature range and dual outputs are not required | Select MAX699CPA+ only if ambient operating temperature stays within 0°C–70°C and single RESET output suffices |
| TPS3823-50DBVR | Fixed 5.0V reset threshold (vs. 4.65V), no watchdog function, SOT-23-5 package, lower quiescent current (12μA) | Applicable where precise 5.0V monitoring suffices and watchdog supervision is unnecessary | Choose TPS3823-50DBVR for cost-sensitive, space-constrained applications without watchdog needs |
Compared with MAX699CPA+, the MAX699EWE+ adds extended temperature support and dual-reset outputs; versus TPS3823-50DBVR, it trades ultra-low power for integrated watchdog and wider VCC tolerance (3.0V–5.5V), making it appropriate for industrial μP supervision where reliability under voltage stress is critical.
Availability
MAX699EWE+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, and telecom base station management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX699EWE+ 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 highly integrated, low-component-count reset and watchdog solutions specifically engineered for reliable microprocessor supervision in cost-sensitive and thermally demanding environments.
FAQ
What is the reset threshold voltage for MAX699EWE+?
The MAX699EWE+ asserts RESET when VCC falls below 4.4V and deasserts it at 4.65V (typical), with 40mV hysteresis. This threshold is factory-trimmed and guaranteed over the full -40°C to +85°C temperature range, ensuring consistent brownout detection without external calibration.
Does MAX699EWE+ require external components to operate?
No, the MAX699EWE+ requires zero external components for basic reset and watchdog operation. Its internal voltage reference, timing capacitor, and comparator circuitry eliminate the need for resistors, capacitors, or diodes - reducing BOM count, PCB area, and potential failure points in μP supervision circuits.
How is the watchdog function enabled or disabled on MAX699EWE+?
The watchdog function on MAX699EWE+ is controlled solely by the WDI pin (pin 11). Leaving WDI unconnected disables the watchdog; toggling it at least once every 1s enables supervision. No configuration register or external signal is needed - behavior is hardware-determined and failsafe.
What is the purpose of the two RESET outputs on MAX699EWE+?
MAX699EWE+ provides both active-low (pin 15) and active-high (pin 16) RESET outputs in its SO package. This allows direct interfacing with devices requiring either polarity without level-shifting circuitry - e.g., driving FPGA PROG_B (active-low) and ASIC reset-enable (active-high) simultaneously from one supervisor.
Can MAX699EWE+ monitor supply voltages other than +5V?
While optimized for +5V systems, MAX699EWE+ operates from 3.0V to 5.5V and monitors VCC directly. It does not support adjustable thresholds or external resistor dividers; its 4.65V trip point is fixed. For non-5V rails, consider dedicated supervisors like the MAX6326 series with user-selectable thresholds.
MAX699EWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- 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, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX699EWE+ FAQ
1.How can I place an order for MAX699EWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX699EWE+ 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 MAX699EWE+ reliable?
The price and inventory of MAX699EWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX699EWE+ is usually 5 days.
3.What payment methods are accepted for MAX699EWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX699EWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX699EWE+?
MAX699EWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX699EWE+ 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 MAX699EWE+?
For technical support, including MAX699EWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX699EWE+ requirements.
6.How does Aetrix verify that MAX699EWE+ is sourced from the original manufacturer or authorized distributors?
All MAX699EWE+ 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 MAX699EWE+ meets industry standards.
7.What is the process for return or replacement of MAX699EWE+?
All MAX699EWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX699EWE+, 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 MAX699EWE+ part is unused and in its original packaging.
Return procedure for MAX699EWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX699EWE+ 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…
