My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6705AMKA-T
- Part No.:
- MAX6705AMKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6705AMKA-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6705AMKA-T from Maxim Integrated is an A-version microprocessor supervisory circuit in 8-pin SOT23 package, providing active-low push-pull reset output, independent watchdog timer with 1.6s timeout, 0.62V power-fail comparator input (PFI), and active-low manual reset input (MR). It monitors single-supply voltage (e.g., +3.3V or +2.5V) and supports critical µP power monitoring in automotive and industrial control systems.
For engineers reviewing the MAX6705AMKA-T datasheet, MAX6705AMKA-T pinout, MAX6705AMKA-T application, or MAX6705AMKA-T equivalent, this page delivers verified functional identity, confirmed pin roles, exact reset and watchdog timing values, power-fail threshold behavior, and real-world substitution guidance - all aligned to Maxim's official specifications for the A-version family.
Technical Context
The MAX6705AMKA-T implements a dual-comparator architecture: one internal reference monitors VCC against a factory-trimmed threshold (here: 3.08V, suffix 'M'), while a second 0.62V reference enables external voltage monitoring via PFI. Its watchdog timer asserts WDO low on timeout or undervoltage, and deasserts immediately upon valid WDI edge or MR pull-down - distinguishing it from non-A versions.
Reset generation uses a guaranteed-valid-to-1V architecture with 140ms timeout delay; RESET remains asserted for ≥120ms after VCC rises above threshold. The device guarantees logic-low RESET output (≤0.4V at 3.2mA sink) across full -40°C to +125°C operating range and supports supply voltages from 2.55V to 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | +2.55V to +3.6V - supports 3.3V system rails with margin for regulator dropout. |
| Reset Threshold (VTH) | 3.08V (typ) at -40°C to +125°C - factory-trimmed for precise +3.3V supervision. |
| Reset Timeout Period (tRP) | 140ms (typ), 120–300ms (min–max) - ensures µP initialization completes before release. |
| Watchdog Timeout (tWD) | 1.6s (typ), 0.96–2.52s (min–max) - provides robust firmware activity monitoring. |
| PFI Threshold | 0.62V (typ), ±6mV hysteresis - enables accurate early-warning power-fail detection. |
| Supply Current (ICC) | 9µA (typ) at VCC = 3.3V - ultra-low quiescent current for battery-backed systems. |
| RESET Output Type | Active-low push-pull - eliminates need for external pull-up resistor; drives directly into CMOS inputs. |
Pinout & Package
Package: 8-pin SOT23-8 (JEDEC MO-178 BA, 3.00mm × 1.75mm body, 0.65mm pitch). RoHS-compliant lead-free option available as MAX6705AMKA+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible; internal 50kΩ pullup; forces reset when pulled low; also clears WDO in A-version. |
| 2 VCC | Main supply input | Power source for internal circuitry and push-pull outputs; monitored for reset assertion. |
| 3 GND | Ground reference | Common return path for all analog and digital functions; must be low-impedance. |
| 4 PFI | Power-fail input | High-impedance node tied to 0.62V reference; accepts external resistive divider for secondary voltage monitoring. |
| 5 PFO | Power-fail output | Active-low open-drain output; asserts when PFI < 0.62V; requires external pull-up for interrupt signaling. |
| 6 WDI | Watchdog input | Edge-sensitive; toggling within 1.6s prevents WDO assertion; 50ns minimum pulse width detectable. |
| 7 RESET | Active-low reset output | Push-pull driver; guaranteed low ≤0.4V at 3.2mA sink; valid down to VCC = 1V. |
| 8 WDO | Active-low watchdog output | Independent of RESET; asserts on timeout or VCC/RST_IN undervoltage; deasserts on WDI edge or MR low. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures reliable reset assertion during deep brownout, preventing µP runaway before complete power loss. |
| Immunity to short falling VCC transients | Rejects <100ns glitches on VCC, avoiding spurious resets in noisy power environments. |
| Independent PFI/PFO comparator | Enables early power-fail warning without affecting reset timing - allows µP to execute orderly shutdown. |
| A-version WDO deassertion logic | WDO clears immediately on MR pull-down or valid WDI edge - simplifies watchdog recovery without reset timeout delay. |
| Low 9µA supply current at 3.3V | Extends battery life in portable or energy-harvesting applications where supervisory ICs remain always-on. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply and 5V sensor rail in harsh under-hood environment with wide temperature swings. IC Role / Device Role / Timing Role: Provides primary reset signal to ARM Cortex-M7 MCU and generates early PFO interrupt for CAN bus graceful shutdown. Use Value: 3.08V reset threshold matches nominal 3.3V rail tolerance; 140ms timeout exceeds ECU bootloader requirements; -40°C to +125°C rating ensures operation across full automotive spec. |
Use Scenario: Supervises FPGA configuration voltage and auxiliary 2.5V I/O bank in modular programmable logic controller. IC Role / Device Role / Timing Role: Generates synchronized reset for FPGA and CPLD; uses PFI to monitor isolated 12V field power supply via resistor divider. Use Value: 0.62V PFI reference enables precise 12V trip point (e.g., 10.8V); push-pull RESET eliminates external components; low ICC reduces thermal load in sealed enclosures. |
| Medical Infusion Pump Controller | Telecom Remote Radio Unit (RRU) |
Use Scenario: Ensures fail-safe restart of safety-critical ARM-based pump controller after AC/DC converter brownout. IC Role / Device Role / Timing Role: Asserts hardware reset on VCC dip below 3.08V; feeds WDO to NMI input for firmware-level fault logging prior to reset. Use Value: Watchdog timeout (1.6s) aligns with pump motor stall detection window; MR input supports emergency hard-reset button; A-version WDO/MR interaction enables controlled watchdog recovery. |
Use Scenario: Supervises 3.3V baseband processor and 5V RF front-end bias supply in outdoor 5G small cell equipment. IC Role / Device Role / Timing Role: Drives reset to Xilinx Zynq SoC and triggers PFO interrupt to initiate RF power ramp-down before main supply collapse. Use Value: 120–300ms tRP range accommodates variable FPGA configuration times; PFO open-drain output interfaces directly with optocoupled isolation stage; SOT23-8 footprint saves PCB area in space-constrained RRU modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6705MKA-T | Non-A version: WDO latches low on timeout and only clears after valid WDI transition; no MR-triggered deassertion. | Lacks immediate WDO recovery via MR; requires strict WDI toggling discipline in firmware. | Select when watchdog recovery must be strictly event-driven and MR is reserved solely for manual reset. |
| TPS3808G33DBVR | TI part: 3.3V fixed threshold, 200ms reset timeout, no PFI/PFO, no watchdog output - only WDT reset pulse. | Provides basic reset + watchdog reset pulse only; no independent watchdog status or power-fail warning capability. | Select when only primary reset and watchdog-triggered reset are needed, and PFI/PFO functionality is unnecessary. |
Compared with MAX6705MKA-T, the MAX6705AMKA-T offers faster, more flexible watchdog recovery via MR; compared with TPS3808G33DBVR, it adds critical power-fail warning and independent watchdog status - enabling richer system-level fault handling in safety-critical designs.
Availability
MAX6705AMKA-T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pumps, and telecom remote radio units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6705AMKA-T 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 demanding industrial, automotive, and communications applications.
The MAX6701–MAX6708 family was engineered specifically for high-reliability microprocessor supervision - integrating reset, watchdog, power-fail warning, and manual reset in minimal SOT23-8 footprint for space-constrained embedded systems.
FAQ
What is the reset threshold voltage for MAX6705AMKA-T?
The MAX6705AMKA-T has a factory-trimmed VCC reset threshold of 3.08V (typical), specified over -40°C to +125°C. This value corresponds to the 'M' suffix in the part number and is optimized for reliable supervision of standard 3.3V supply rails with adequate noise margin.
Does MAX6705AMKA-T support power-fail warning for voltages other than VCC?
Yes. The MAX6705AMKA-T includes a dedicated PFI input referenced to an internal 0.62V comparator. By connecting an external resistor divider to PFI, designers can monitor secondary supplies (e.g., 5V, 12V, or 24V rails) and generate an early warning interrupt via the PFO output before VCC drops.
How does the watchdog behavior differ between MAX6705AMKA-T and MAX6705MKA-T?
In the MAX6705AMKA-T, WDO deasserts immediately when MR is pulled low or a valid WDI edge occurs. In contrast, the non-A version MAX6705MKA-T requires a WDI transition to clear latched WDO - MR pull-low only forces reset but does not affect WDO state. This makes the A-version more responsive for controlled watchdog recovery.
What is the function of the PFO pin on MAX6705AMKA-T?
The PFO pin on MAX6705AMKA-T is an active-low, open-drain power-fail output. It asserts low when the voltage at PFI falls below the 0.62V internal reference. Used with an external pull-up resistor, PFO delivers an interrupt signal to the µP - enabling software-initiated safe shutdown before main supply collapse.
Can MAX6705AMKA-T operate down to 1V supply voltage?
Yes. The MAX6705AMKA-T guarantees valid RESET output down to VCC = 1V - meaning it continues asserting logic-low reset even as supply voltage collapses. Below 1V, RESET becomes high-impedance; for guaranteed low state to ground, a 100kΩ pull-down resistor on the RESET pin is recommended per Maxim's application guidance.
MAX6705AMKA-T 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:
- 4.38V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6705AMKA-T FAQ
1.How can I place an order for MAX6705AMKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6705AMKA-T 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 MAX6705AMKA-T reliable?
The price and inventory of MAX6705AMKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6705AMKA-T is usually 5 days.
3.What payment methods are accepted for MAX6705AMKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6705AMKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6705AMKA-T?
MAX6705AMKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6705AMKA-T 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 MAX6705AMKA-T?
For technical support, including MAX6705AMKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6705AMKA-T requirements.
6.How does Aetrix verify that MAX6705AMKA-T is sourced from the original manufacturer or authorized distributors?
All MAX6705AMKA-T 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 MAX6705AMKA-T meets industry standards.
7.What is the process for return or replacement of MAX6705AMKA-T?
All MAX6705AMKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6705AMKA-T, 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 MAX6705AMKA-T part is unused and in its original packaging.
Return procedure for MAX6705AMKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6705AMKA-T 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…
