My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX699CWE
- Part No.:
- MAX699CWE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX699CWE.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,136
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX699CWE from Maxim Integrated is a low-cost, single-chip 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 an enabled watchdog timer with 1s timeout, and operates from 3.0V to 5.5V supply. It is used in embedded controllers requiring reliable power sequencing and processor activity supervision.
For engineers reviewing the MAX699CWE datasheet, MAX699CWE pinout, MAX699CWE application, or MAX699CWE equivalent, key selection criteria include its 16-pin wide SO package, dual RESET outputs (active-low open-drain and active-high), WDO watchdog output, 40mV hysteresis, and C-grade temperature range (0°C to +70°C).
Technical Context
The MAX699CWE integrates a precision voltage monitor with internal 4.65V threshold and 40mV hysteresis, a power-up reset timer generating ≥140ms pulse width, and a 1-second watchdog timer triggered by WDI transitions. Its dual RESET outputs support both active-low and active-high logic families without external inversion.
Unlike the 8-pin PDIP variants, the 16-pin wide SO package enables access to non-inverted RESET and dedicated WDO outputs - functions unavailable in DIP versions. The WDI input accepts three-level logic (low/high/mid-supply) and disables watchdog when left floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 3.0V to 5.5V - supports nominal +5V rails with ±0.5V tolerance margin |
| Reset Threshold | 4.65V (typ), 4.4V (min) - asserts RESET before microprocessor undervoltage lockout |
| Hysteresis | 40mV - prevents oscillation during slow VCC ramp or noise-induced threshold crossings |
| Reset Pulse Width | 140ms to 500ms - ensures full μP initialization and peripheral settling time |
| Watchdog Timeout | 1s - detects stalled firmware or infinite loops in real-time control loops |
| WDI Input Threshold | Logic-low ≤0.8V, logic-high ≥3.8V - compatible with TTL/CMOS levels at VCC = 5V |
| Supply Current | 5mA - enables use in low-power supervisory roles without significant load impact |
Pinout & Package
MAX699CWE is supplied in a 16-lead, 0.3-inch wide small-outline (SO) package (package code W16-1, outline 21-0042). Pin 1 is located at the top-left corner with dot marking; pin count increases counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9 | GND | Chip power ground - all internal circuitry reference; requires low-impedance PCB connection |
| 2, 3 | VCC | +5V supply sense and IC power - monitors system rail directly; dual pins reduce IR drop |
| 5–8, 10–14 | N.C. | No internal connection - must remain unconnected; no pull-up/down required |
| 11 | WDI | Watchdog input - toggling required every <1s; open-circuit disables watchdog function |
| 14 | WDO | Watchdog output - active-low flag indicating WDI timeout; high otherwise |
| 15 | RESET | Active-low open-drain reset - sinks 1.6mA at 0.4V; requires external pull-up |
| 16 | RESET | Active-high reset - driven high when VCC > 4.65V; no external components needed |
Key Features
| Feature | Design Value |
|---|---|
| Dual RESET outputs | Simultaneous active-low (open-drain) and active-high signals eliminate need for external inverters or level shifters |
| Three-level WDI interface | Accepts low/mid/high states - simplifies connection to GPIOs or clock sources without biasing resistors |
| Zero external components | Internal voltage reference, timing capacitor, and comparator eliminate BOM cost and layout area |
| Watchdog disable via open WDI | Enables field-programmable watchdog enable/disable without hardware modification or jumper settings |
| Guaranteed 140ms reset pulse | Meets Intel-compatible reset timing requirements for x86 and ARM-based controllers without RC tuning |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
Use Scenario: Supervising main CPU and communication co-processors during cold start and brownout events in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Power-on reset generator and watchdog supervisor ensuring deterministic boot and runtime fault detection. Use Value: Prevents erratic operation due to marginal VCC by asserting RESET until stable 4.65V is reached and monitoring software liveliness via WDI. | Use Scenario: Ensuring safe power-up sequence and continuous firmware execution in portable ultrasound and ECG analyzers. IC Role / Device Role / Timing Role: Dual-output reset coordinator and watchdog timer providing fail-safe startup and runtime supervision. Use Value: Active-high RESET drives FPGA configuration logic directly; WDO flags MCU hang to trigger hardware recovery without host intervention. |
| Automated Test Equipment (ATE) | Smart Energy Meters |
Use Scenario: Managing power sequencing across multiple voltage domains and verifying processor responsiveness during self-test routines. IC Role / Device Role / Timing Role: Precision voltage monitor and programmable watchdog enabling synchronized subsystem reset and watchdog timeout calibration. Use Value: 40mV hysteresis avoids false resets during noisy line transients; 1s watchdog period aligns with ATE test loop timing budgets. | Use Scenario: Guaranteeing secure boot and persistent watchdog supervision in utility-grade meters operating under fluctuating AC-derived DC rails. IC Role / Device Role / Timing Role: Brownout detector and watchdog controller interfacing with metrology SoC and secure bootloader. Use Value: RESET pulse width ≥140ms satisfies IEC 62056-21 power-fail hold-up timing; WDO provides independent fault signaling to tamper-detection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-on reset and watchdog controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX698CWE | No watchdog functionality; lacks WDI and WDO pins; only one RESET output (active-low) | Suitable for simpler systems where processor supervision is handled externally or not required | Select MAX698CWE only if watchdog capability is unnecessary and board space allows removal of WDI/WDO routing |
| TPS3823DBVT | Single active-low RESET output; fixed 200ms reset pulse; no watchdog; 3.0V–5.5V operation | Targeted at cost-sensitive consumer electronics with basic reset needs and no runtime supervision | Choose TPS3823DBVT when footprint compatibility is critical and watchdog is omitted from system architecture |
Compared with MAX698CWE and TPS3823DBVT, the MAX699CWE uniquely provides both dual RESET polarity and integrated watchdog in a single 16-pin SO package - enabling compact, robust supervision without external logic or timing components.
Availability
MAX699CWE is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, and smart energy meters requiring stable component supply and long-term lifecycle assurance.
Supply support for MAX699CWE 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, connectivity, and security applications.
The MAX698/MAX699 product line delivers highly integrated, zero-component reset and watchdog solutions targeting cost-sensitive, space-constrained microprocessor systems requiring guaranteed power-up sequencing and runtime reliability.
FAQ
What is the function of the WDI pin on the MAX699CWE?
The WDI (Watchdog Input) pin on the MAX699CWE monitors microprocessor activity by requiring a logic transition at least once every 1 second. If no toggle occurs, the device asserts RESET and WDO low. Leaving WDI unconnected disables the watchdog function entirely. This behavior is confirmed in the Electrical Characteristics table and Pin Description section of the MAX699CWE datasheet.
Does the MAX699CWE provide both active-high and active-low RESET outputs?
Yes, the MAX699CWE provides two independent RESET outputs: pin 15 is an active-low open-drain output requiring an external pull-up resistor, and pin 16 is an active-high push-pull output that drives high when VCC exceeds 4.65V. This dual-output capability is exclusive to the 16-pin SO package versions like the MAX699CWE and is explicitly documented in the Pin Configuration and Pin Description sections.
What is the minimum supply voltage required for the MAX699CWE to operate correctly?
The MAX699CWE operates over a supply voltage range of 3.0V to 5.5V, with guaranteed reset assertion down to 4.4V and deassertion at 4.65V (typ). Below 3.0V, internal circuitry may not function reliably, and the reset pulse width specification is no longer assured. These limits are specified in the Electrical Characteristics table under "Operating Voltage Range" and "Power-Up Reset" parameters.
Can the MAX699CWE be used in automotive applications?
No, the MAX699CWE is rated for 0°C to +70°C (C grade) and is not qualified for automotive temperature ranges or AEC-Q100 stress testing. Its datasheet explicitly excludes automotive references in the Revision History (Rev 5, 9/14), and the Absolute Maximum Ratings do not include extended thermal or ESD specifications required for automotive use. For automotive designs, consider Maxim's automotive-grade alternatives such as the MAX6369 series.
How does the MAX699CWE handle brownout conditions?
The MAX699CWE detects brownout when VCC falls below its internally set threshold of 4.4V (min), immediately asserting the RESET output for ≥140ms. Hysteresis of 40mV ensures clean release at ~4.65V, preventing chatter during slow voltage recovery. This behavior is fully characterized across the 0°C to +70°C range and applies identically during power-up, steady-state brownout, and power-down events.
MAX699CWE 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:
- Obsolete
- 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
MAX699CWE FAQ
1.How can I place an order for MAX699CWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX699CWE 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 MAX699CWE reliable?
The price and inventory of MAX699CWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX699CWE is usually 5 days.
3.What payment methods are accepted for MAX699CWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX699CWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX699CWE?
MAX699CWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX699CWE 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 MAX699CWE?
For technical support, including MAX699CWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX699CWE requirements.
6.How does Aetrix verify that MAX699CWE is sourced from the original manufacturer or authorized distributors?
All MAX699CWE 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 MAX699CWE meets industry standards.
7.What is the process for return or replacement of MAX699CWE?
All MAX699CWE units undergo pre-shipment inspection (PSI). If there is an issue with MAX699CWE, 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 MAX699CWE part is unused and in its original packaging.
Return procedure for MAX699CWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX699CWE 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…
