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Analog Devices Inc./Maxim Integrated MAX6704YKA
- Part No.:
- MAX6704YKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6704YKA.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,496
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Product details
Overview
The MAX6704YKA from Maxim Integrated is a low-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, providing dual complementary reset outputs (active-low and active-high push-pull), an adjustable power-fail comparator (PFI/PFO), manual reset input (MR), and a reset-based watchdog timer with 1.6s timeout. It monitors a single supply voltage (2.19V threshold per Y suffix), guarantees valid reset down to VCC = 1V, and supports critical µP power monitoring in industrial controllers and embedded systems.
For engineers reviewing the MAX6704YKA datasheet, MAX6704YKA pinout, MAX6704YKA application, or MAX6704YKA equivalent, this page delivers verified functional identity, exact pin roles, confirmed reset timing (140ms timeout), PFI threshold (0.62V typ), and validated alternatives for multivoltage supervision designs requiring guaranteed reset assertion during brownout and power-down.
Technical Context
The MAX6704YKA integrates a precision voltage monitor with 60ppm/°C temperature coefficient, a reset generator with 140ms timeout (120–300ms over temp), and a reset-triggered watchdog that asserts a full reset pulse-not a separate WDO-on timeout. Its dual push-pull RESET/RESET outputs provide simultaneous active-low and active-high signaling without external inversion.
It features an independent power-fail comparator with 0.62V internal reference, enabling early warning of supply collapse via externally adjustable PFI divider networks; PFO delivers open-drain or push-pull active-low output synchronized to PFI crossing. MR input includes 50kΩ internal pullup and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V (Y-suffix), ±3% tolerance over -40°C to +125°C - sets precise brownout detection point for 2.5V/3.3V system rails |
| Reset Timeout Period | 140ms typical (120–300ms range) - ensures µP remains held in reset long enough for stable power recovery |
| Power-Fail Input Threshold | 0.62V ±5mV - enables accurate early-warning detection of secondary supplies via external resistor divider |
| Supply Voltage Range | 1.2V to 5.5V - supports operation down to ultralow VCC while maintaining guaranteed reset validity to 1V |
| Watchdog Timeout | 1.6s typical (0.96–2.52s range) - triggers full reset pulse on µP activity failure, no independent WDO output |
| Output Type | Dual push-pull RESET (active-low) and RESET (active-high) - eliminates need for external inverters in dual-signaling interfaces |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment applications |
Pinout & Package
Package: 8-pin SOT23-8 (3.00mm × 1.75mm × 1.30mm body, 0.65mm pitch), lead-free compatible (suffix +T).
| 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; 100ns glitch rejection prevents spurious triggering |
| 2 VCC | Main supply input | Power source for internal circuitry and push-pull outputs; reset assertion guaranteed down to VCC = 1V |
| 3 GND | Ground reference | Common return path for all analog and digital functions; required for accurate threshold comparison |
| 4 PFI | Power-fail input | High-impedance comparator input referenced to 0.62V; accepts external voltage divider for custom trip points |
| 5 PFO | Power-fail output | Active-low push-pull output asserted when PFI < 0.62V; used to interrupt µP before main supply collapse |
| 6 WDI | Watchdog input | Edge-sensitive input; rising/falling edge clears watchdog timer; timeout triggers full reset pulse (not WDO) |
| 7 RESET | Active-low reset output | Push-pull output asserted low during power-up, brownout, MR assertion, or watchdog timeout |
| 8 RESET | Active-high reset output | Complementary push-pull output asserted high under same conditions as RESET; no external inverter needed |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary reset outputs | Simultaneous active-low and active-high push-pull signals eliminate level-shifting components and reduce BOM count |
| Adjustable power-fail warning | PFI/PFO pair enables configurable early-warning detection of auxiliary supplies (e.g., I/O or core rails) with sub-1mV hysteresis |
| Reset-based watchdog timer | 1.6s timeout directly asserts RESET/RESET pulses - no separate watchdog output required, simplifying NMI routing |
| Guaranteed reset below 1V VCC | Ensures deterministic µP hold state during deep brownout or battery sag, critical for data retention and safe shutdown |
| Immunity to short VCC transients | Rejects <100ns supply dips, preventing false resets in electrically noisy environments like motor drives or switching regulators |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.3V I/O rail and 2.5V core supply in programmable logic controller with real-time Ethernet interface. IC Role / Device Role / Timing Role: Primary supervisory IC asserting dual-reset signals to ARM Cortex-M7 MCU and FPGA; triggers PFO interrupt 50ms before main regulator dropout. Use Value: Prevents firmware corruption during transient load dumps by holding µP in reset until both supplies stabilize post-brownout. | Use Scenario: Supervises 5V sensor bus and 3.3V CAN transceiver supply in door module with LIN communication. IC Role / Device Role / Timing Role: Detects undervoltage on 5V rail using VCC monitor and secondary 3.3V rail via PFI divider; asserts RESET/RESET synchronously. Use Value: Enables fail-safe shutdown of window motor drivers before supply collapse, meeting ISO 16750-2 pulse 4a requirements. |
| Medical Infusion Pump | Network Edge Router |
Use Scenario: Ensures reliable startup and brownout recovery of safety-critical ARM-based pump controller powered from Li-ion battery. IC Role / Device Role / Timing Role: Monitors battery-derived 3.3V rail (Y-threshold); uses MR for emergency stop button; watchdog resets µP if motor control loop hangs. Use Value: Guarantees reset assertion down to 1V VCC during battery depletion, satisfying IEC 62304 Class C software safety requirements. | Use Scenario: Provides power sequencing and fault monitoring for multi-rail switch ASIC (1.2V core, 2.5V I/O, 3.3V PHY) in fanless router. IC Role / Device Role / Timing Role: Uses PFI to monitor 1.2V core rail via resistor divider; PFO interrupts SoC to initiate graceful packet drain before shutdown. Use Value: Reduces risk of packet loss during AC brownout by initiating controlled shutdown 100ms prior to complete supply failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6705YKA | Single active-low push-pull reset output only; includes independent PFI/PFO and WDI but no RESET complement | Lacks active-high reset output - requires external inverter for dual-signaling µP interfaces | Select when board space or cost constraints preclude dual-output requirement and only one reset polarity is needed |
| MAX6708YKA | Identical pinout and reset/PFI/WDI functionality, but watchdog timer disabled - no watchdog timeout reset pulse | No watchdog supervision capability; suitable only where µP activity monitoring is handled externally or unnecessary | Choose when system-level watchdog is implemented in firmware or external CPLD, and only basic voltage monitoring is required |
Compared with MAX6705YKA and MAX6708YKA, the MAX6704YKA uniquely delivers dual complementary reset outputs in the same footprint while retaining full watchdog and power-fail functionality - eliminating design compromises between supervision coverage and interface compatibility.
Availability
MAX6704YKA is available at Aetrix Electronics and suitable for industrial controllers, automotive body electronics, medical infusion pumps, and network edge routers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6704YKA 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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6701–MAX6708 family was engineered specifically for compact, multivoltage µP supervision in space-constrained embedded systems - delivering integrated reset, watchdog, and power-fail warning in ultra-small SOT23 packages.
FAQ
What is the exact reset threshold voltage for MAX6704YKA?
The MAX6704YKA has a nominal VCC reset threshold of 2.19V, corresponding to the 'Y' suffix in the part number. This value is specified with ±3% tolerance over the full operating temperature range (-40°C to +125°C), and the device guarantees valid reset assertion down to VCC = 1V. The threshold is factory-trimmed and characterized per the Electrical Characteristics table in the official MAX6701–MAX6708 datasheet Rev 3.
Does MAX6704YKA provide an independent watchdog output (WDO)?
No, the MAX6704YKA does not feature an independent watchdog output (WDO). Unlike MAX6701–MAX6703 and MAX6705–MAX6707 variants, its watchdog function is reset-based: timeout of the 1.6s watchdog timer directly asserts the RESET and RESET outputs for the full 140ms timeout period. This architecture eliminates the need for external WDO-to-MR feedback and simplifies system-level NMI handling.
How does the power-fail comparator work on MAX6704YKA?
The MAX6704YKA's power-fail comparator uses an internal 0.62V reference connected to the inverting input; the non-inverting input is exposed as the PFI pin. When an external resistive divider applies a voltage to PFI that falls below 0.62V, the comparator asserts the active-low PFO output. PFO can be configured as push-pull or open-drain (per ordering option) and is fully independent of the main reset circuitry, enabling early-warning interrupts before VCC dropout.
What are the key differences between MAX6704YKA and MAX6708YKA?
The MAX6704YKA and MAX6708YKA share identical pinout, reset thresholds, PFI/PFO functionality, and dual complementary reset outputs. The sole functional difference is that MAX6708YKA omits the watchdog timer entirely - it has no WDI pin function and provides no watchdog-triggered reset. All other electrical and timing specifications, including 140ms reset timeout and 0.62V PFI threshold, are identical between the two parts.
Can MAX6704YKA monitor multiple supply voltages simultaneously?
The MAX6704YKA monitors only one primary supply voltage (VCC) via its internal threshold detector. It does not support additional adjustable reset inputs like RST_IN1/RST_IN2 found in MAX6701–MAX6703 variants. However, it *can* monitor secondary supplies indirectly using the PFI pin with an external resistor divider - for example, scaling a 5V rail to 0.62V at PFI to trigger PFO when that rail drops below 4.8V - but this provides only power-fail warning, not full reset assertion.
MAX6704YKA 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.19V, Adj
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6704YKA FAQ
1.How can I place an order for MAX6704YKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6704YKA 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 MAX6704YKA reliable?
The price and inventory of MAX6704YKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6704YKA is usually 5 days.
3.What payment methods are accepted for MAX6704YKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6704YKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6704YKA?
MAX6704YKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6704YKA 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 MAX6704YKA?
For technical support, including MAX6704YKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6704YKA requirements.
6.How does Aetrix verify that MAX6704YKA is sourced from the original manufacturer or authorized distributors?
All MAX6704YKA 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 MAX6704YKA meets industry standards.
7.What is the process for return or replacement of MAX6704YKA?
All MAX6704YKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6704YKA, 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 MAX6704YKA part is unused and in its original packaging.
Return procedure for MAX6704YKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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