My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6703YKA+
- Part No.:
- MAX6703YKA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6703YKA+.pdf
- Description:
- MAX6703 LOW-VOLTAGE, MICROPROCES
- Quantity:
- Payment:
- Shipping:
Inventory:1,259
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6703YKA+ from Maxim Integrated is an active-low open-drain microprocessor supervisory circuit in 8-pin SOT23 package, designed for triple-voltage monitoring (VCC + two adjustable inputs) with 140ms reset timeout, 1.6s watchdog timer, and 0.62V power-fail comparator input. It supports industrial temperature range (−40°C to +125°C) and guarantees valid reset output down to VCC = 1V, used in embedded controllers requiring robust brownout and watchdog protection.
For engineers reviewing the MAX6703YKA+ datasheet, MAX6703YKA+ pinout, MAX6703YKA+ application, or MAX6703YKA+ equivalent, key selection criteria include its dual adjustable reset inputs (RST_IN1/RST_IN2), open-drain RESET output configuration, Y-suffix 2.19V VCC reset threshold, and compatibility with multivoltage µP systems requiring manual reset, power-fail warning, and independent watchdog assertion.
Technical Context
The MAX6703YKA+ implements a triple-threshold supervision architecture: primary VCC monitoring at 2.19V (Y-suffix), plus two user-adjustable thresholds via external resistor dividers on RST_IN1 and RST_IN2 pins-each referenced to an internal 0.62V comparator. Its reset generator asserts open-drain RESET low for ≥140ms after any monitored supply falls below threshold.
It integrates a 1.6s watchdog timer with independent WDO output that latches low on timeout or undervoltage; WDO deasserts only upon valid WDI edge or MR pull-low (A-version behavior). The PFI/PFO comparator operates independently with 1µs propagation delay and 6mV hysteresis, enabling early power-fail warning without affecting reset timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V (Y-suffix), ±3% over −40°C to +125°C - sets primary brownout detection point for 2.5V/2.7V system rails |
| Reset Timeout Period | 140ms (typ), 120–300ms over temperature - ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s over temperature - provides fail-safe response window for µP software hang detection |
| PFI Threshold | 0.62V (typ), ±5mV over temperature - enables precise external voltage monitoring via resistor divider |
| Supply Current | 9–20µA at VCC < 3.6V - ultra-low quiescent current suitable for battery-backed or energy-sensitive systems |
| Operating Voltage Range | 1.2V to 5.5V - supports operation during deep brownout while maintaining reset validity down to 1V |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and level-shifting across mixed-voltage domains |
Pinout & Package
MAX6703YKA+ uses an 8-pin SOT23-8 package (3.00mm × 1.75mm × 1.30mm body, 0.65mm pitch), lead-free per RoHS, with exposed pad not electrically connected. Pin 1 marked by dot; pin numbering follows standard SOT23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup; forces reset when pulled low; also clears watchdog timer |
| 2 VCC | Main supply input | Primary power source for IC and reference for VCC reset threshold; powers push-pull outputs (not applicable here) |
| 3 GND | Ground reference | Common return path for all internal comparators, timers, and output drivers |
| 4 PFI | Power-fail input | High-impedance comparator input referenced to 0.62V; accepts external voltage divider for secondary rail monitoring |
| 5 PFO | Power-fail output | Open-drain active-low output asserted when PFI < 0.62V; used for µP interrupt or cascaded reset initiation |
| 6 WDI | Watchdog input | Edge-sensitive input; rising or falling transition resets 1.6s watchdog timer; 50ns minimum pulse width detectable |
| 7 RESET | Reset output | Active-low open-drain output; asserted when VCC, RST_IN1, or RST_IN2 fall below threshold; requires external pullup |
| 8 WDO | Watchdog output | Active-low open-drain output; latched low on watchdog timeout or undervoltage; cleared by WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs (RST_IN1/RST_IN2) | Enables simultaneous monitoring of three system voltages (e.g., core, I/O, analog rails) using single 0.62V internal reference |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset assertion even during severe brownout, preventing undefined state entry |
| Independent PFI/PFO comparator | Provides early power-fail warning without interfering with reset timing; supports programmable trip point via resistor network |
| 1.6s watchdog timer with latched WDO | Prevents spurious resets from noise; WDO remains asserted until explicitly cleared by WDI edge or MR, improving fault isolation |
| Immunity to short VCC transients | Rejects <100ns glitches on VCC, avoiding false resets during switching noise or ESD events |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Monitoring 2.5V core, 3.3V I/O, and 5V sensor supply rails in programmable logic controller CPU board. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting open-drain RESET to hold ARM Cortex-M4 in known state during rail instability. Use Value: Prevents firmware corruption during transient brownouts; 140ms timeout exceeds typical DC-DC recovery time. |
Use Scenario: Supervising 2.7V microcontroller supply and 12V-derived 5V/3.3V rails in door module ECU with CAN interface. IC Role / Device Role / Timing Role: Primary reset generator with PFI tied to battery monitor divider; triggers orderly shutdown before undervoltage lockout. Use Value: 0.62V PFI threshold enables accurate 9.5V battery warning; WDO connected to NMI for watchdog-triggered diagnostics. |
| Medical Infusion Pump Controllers | Networking Switch Management ASICs |
|
Use Scenario: Ensuring safe startup and fault recovery in battery-powered infusion pump MCU with isolated motor driver supplies. IC Role / Device Role / Timing Role: Triple-supply monitor (VCC, RST_IN1 for 1.8V analog, RST_IN2 for 3.3V comm rail) with manual reset for service mode. Use Value: Open-drain RESET allows shared reset bus with other safety-critical ICs; MR debounced by 140ms timeout eliminates switch bounce issues. |
Use Scenario: Supervising 1.2V core, 2.5V PHY, and 3.3V management rail in Ethernet switch ASIC subsystem. IC Role / Device Role / Timing Role: Independent watchdog (WDI fed by ASIC timer) with WDO routed to FPGA for hardware-level recovery sequence. Use Value: 1.6s timeout aligns with ASIC firmware watchdog window; A-version WDO behavior enables fast recovery without µP intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6703TKA+ | 3.08V VCC reset threshold (T-suffix); same pinout, timing, and feature set | Targeted at 3.3V systems instead of 2.5V/2.7V rails; requires resistor divider recalculation for RST_IN1/RST_IN2 | Select when primary supply is 3.3V and tighter threshold tolerance (±2.5%) is required over full temperature range |
| MAX6316HUT46D3+ | Single 4.63V reset threshold; no adjustable inputs, no PFI/PFO, no watchdog; SOT23-5 package | Simpler single-rail applications only; lacks triple-monitoring capability and power-fail warning function | Choose only for cost-sensitive, space-constrained designs where only basic VCC supervision is needed |
Compared with MAX6703YKA+, MAX6703TKA+ offers higher reset threshold for 3.3V systems but identical supervision architecture, while MAX6316HUT46D3+ sacrifices adjustability and watchdog functionality for smaller footprint and lower cost in basic applications.
Availability
MAX6703YKA+ is available at Aetrix Electronics and suitable for industrial control systems, automotive ECUs, medical devices, and networking equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6703YKA+ 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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX6701–MAX6708 family was designed to replace discrete reset circuits in µP-based systems, integrating precision voltage monitoring, watchdog timing, and power-fail detection into compact SOT23 packages for space-constrained embedded applications.
FAQ
What is the reset threshold voltage for MAX6703YKA+?
The MAX6703YKA+ has a factory-trimmed VCC reset threshold of 2.19V (Y-suffix), specified with ±3% tolerance over −40°C to +125°C. This value is guaranteed by production test and applies to the primary VCC supply monitoring function; RST_IN1 and RST_IN2 thresholds are user-adjustable via external resistors referenced to the internal 0.62V comparator.
Does MAX6703YKA+ support triple-voltage monitoring?
Yes, MAX6703YKA+ supports triple-voltage monitoring: VCC (2.19V fixed), plus two additional supplies via RST_IN1 and RST_IN2 pins. Each adjustable input uses the same 0.62V internal reference, allowing precise threshold setting with external resistor dividers-enabling supervision of core, I/O, and auxiliary rails simultaneously.
What is the function of the PFI and PFO pins on MAX6703YKA+?
On MAX6703YKA+, PFI is a high-impedance input referenced to an internal 0.62V comparator, used to monitor secondary voltages (e.g., battery or auxiliary rail) via external resistor divider. PFO is its corresponding open-drain active-low output, asserted when PFI voltage drops below 0.62V-commonly connected to µP interrupt or manual reset input for early warning action.
How does the watchdog timer behave on MAX6703YKA+?
The MAX6703YKA+ watchdog timer has a nominal 1.6s timeout period. WDO goes low if WDI is not toggled within this window. Unlike non-A versions, the A-version (denoted by 'A' in part number) deasserts WDO immediately when VCC/RST_IN1/RST_IN2 recover, but latches WDO low on timeout until cleared by WDI edge or MR low-providing unambiguous fault indication.
What package type and lead finish does MAX6703YKA+ use?
MAX6703YKA+ uses an 8-pin SOT23-8 package (3.00mm × 1.75mm × 1.30mm) with lead-free (RoHS-compliant) finish. The '+' suffix in the part number explicitly indicates lead-free packaging; the device is rated for −40°C to +125°C operation and features standard SOT23 pinout compatible with automated assembly processes.
MAX6703YKA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.19V, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6703YKA+ FAQ
1.How can I place an order for MAX6703YKA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6703YKA+ 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 MAX6703YKA+ reliable?
The price and inventory of MAX6703YKA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6703YKA+ is usually 5 days.
3.What payment methods are accepted for MAX6703YKA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6703YKA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6703YKA+?
MAX6703YKA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6703YKA+ 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 MAX6703YKA+?
For technical support, including MAX6703YKA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6703YKA+ requirements.
6.How does Aetrix verify that MAX6703YKA+ is sourced from the original manufacturer or authorized distributors?
All MAX6703YKA+ 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 MAX6703YKA+ meets industry standards.
7.What is the process for return or replacement of MAX6703YKA+?
All MAX6703YKA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6703YKA+, 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 MAX6703YKA+ part is unused and in its original packaging.
Return procedure for MAX6703YKA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6703YKA+ 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…
