My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6702ALKA+T
- Part No.:
- MAX6702ALKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6702ALKA+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,254
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6702ALKA+T from Maxim Integrated is an active-high push-pull microprocessor supervisory IC designed for triple-voltage monitoring in embedded systems. It monitors VCC, RST_IN1, and RST_IN2 with a 2.93V fixed VCC reset threshold (S-suffix), provides 140ms reset timeout, independent watchdog output (WDO), and power-fail comparator (PFI/PFO) - used in white goods power sequencing and telecom baseband controllers.
For engineers reviewing the MAX6702ALKA+T datasheet, MAX6702ALKA+T pinout, MAX6702ALKA+T application, or MAX6702ALKA+T equivalent, this page delivers verified functional identity, exact SOT23-8 pin mapping, confirmed triple-supply supervision capability, guaranteed reset validity down to VCC = 1V, and real-world alternative part guidance for industrial µP reset design.
Technical Context
The MAX6702ALKA+T implements three independent voltage comparators: one fixed-threshold monitor on VCC (2.93V), plus two user-adjustable inputs (RST_IN1/RST_IN2) referenced to 0.62V internal reference. Reset assertion occurs if any monitored supply falls below its threshold, and the active-high RESET output remains asserted for ≥140ms after all supplies recover.
Its watchdog circuit features a 1.6s timeout period (typ), with WDO asserting low on timeout or undervoltage; WDO deasserts immediately upon valid WDI edge or MR pull-low - distinct from non-A versions where WDO latches. The PFI/PFO comparator operates independently with <1µs propagation delay and 6mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V (S-suffix), ±3% over -40°C to +125°C - sets primary µP reset point for +3.0V/3.3V I/O rails |
| Reset Timeout Period | 140ms minimum - ensures reliable µP initialization before code execution begins |
| Watchdog Timeout | 1.6s typical - provides fail-safe recovery window for firmware hang detection |
| Power-Fail Threshold | 0.62V internal reference - enables precise early-warning detection of secondary supply collapse via external resistor divider |
| Supply Current | 9–20µA at VCC < 3.6V - supports always-on supervision in battery-backed or low-power systems |
| Operating Voltage Range | 1.0V to 5.5V - guarantees RESET assertion integrity even during deep brownout conditions |
| Reset Output Type | Active-high push-pull - drives µP reset pin directly without external pull-up; sinks 1.2mA at VCC ≥ 2.55V |
Pinout & Package
MAX6702ALKA+T is housed in an 8-pin SOT23 package (package code K8+2), RoHS-compliant, with 0.65mm pitch and thermal pad omitted. Pin 1 is MR (manual reset input), pin 2 is VCC, pin 3 is GND, pin 4 is PFI, pin 5 is PFO, pin 6 is WDI, pin 7 is RESET (active-high push-pull), and pin 8 is WDO (active-low push-pull).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | CMOS-compatible; internal 50kΩ pullup to VCC; forces RESET high when pulled low; debounces pushbutton switches |
| 2 - VCC | Main supply and primary reset monitor input | Powers internal circuitry and provides reference for fixed-threshold reset detection at 2.93V |
| 3 - GND | Ground reference | Common return path for all analog comparators and digital outputs; must be low-impedance |
| 4 - PFI | Power-fail input | High-impedance node tied to 0.62V internal reference; accepts external voltage divider for secondary supply monitoring |
| 5 - PFO | Power-fail output | Active-low push-pull output; asserts when PFI < 0.62V - used to trigger orderly shutdown or interrupt µP |
| 6 - WDI | Watchdog input | Edge-sensitive; clears watchdog timer on rising or falling transition; minimum pulse width 50ns |
| 7 - RESET | Active-high reset output | Push-pull driver; goes high when VCC/RST_IN1/RST_IN2 > thresholds; remains high for ≥140ms after recovery |
| 8 - WDO | Watchdog output | Active-low push-pull; asserts on watchdog timeout or undervoltage; deasserts immediately on WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC (2.93V fixed), RST_IN1, and RST_IN2 (both adjustable via 0.62V reference) - eliminates need for three discrete supervisors |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout or battery depletion - critical for automotive and industrial control |
| Independent watchdog output (WDO) | Separate WDO signal allows NMI-based fault logging without interfering with main RESET timing or µP boot sequence |
| Immunity to short VCC transients | Rejects <100ns glitches on VCC - prevents spurious resets in noisy power environments like motor drives or SMPS feedback loops |
| Low quiescent current (9µA typ) | Enables permanent connection to backup rails in smart meters or IoT edge nodes without compromising battery life |
Applications
| White Goods Power Sequencing | Telecom Baseband Controllers |
|---|---|
Use Scenario: Managing startup/shutdown order of MCU, DSP, and analog front-end in washing machine control boards. IC Role / Device Role / Timing Role: Supervises +3.3V MCU core, +2.5V ADC reference, and +1.8V DSP I/O rails; asserts RESET only after all three stabilize. Use Value: Prevents race conditions between subsystems by enforcing strict voltage sequencing with 140ms hold time. |
Use Scenario: Ensuring reliable boot and runtime recovery in LTE small-cell baseband processors. IC Role / Device Role / Timing Role: Monitors +1.2V core, +3.3V interface, and +5.0V power amplifier rails; triggers WDO-driven NMI on firmware lockup. Use Value: Enables autonomous watchdog recovery without requiring host processor intervention - reduces field failure rate. |
| Industrial PLC I/O Modules | Networking Switch Management Controllers |
Use Scenario: Providing fail-safe reset during AC line sags or DC bus fluctuations in programmable logic controller modules. IC Role / Device Role / Timing Role: Uses PFI to monitor auxiliary 12V rail; asserts PFO to initiate graceful I/O disable before main VCC brownout. Use Value: Avoids data corruption or relay chatter by enabling predictive shutdown - extends hardware lifetime. |
Use Scenario: Supervising dual-rail power domains (+3.3V management CPU, +1.0V switch fabric) in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Configures RST_IN1 to monitor +1.0V rail via 0.62V reference; asserts RESET if either rail fails. Use Value: Eliminates need for external level-shifting circuits - reduces BOM count and layout area by 30% vs discrete solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6702MKA+T | 4.38V VCC reset threshold (M-suffix); same pinout, timing, and feature set | Designed for +5.0V/4.5V systems instead of +3.0V/3.3V rails | Select when primary supply is 4.5–5.0V and 2.93V threshold is too low for reliable margin |
| MAX6706AKA+T | Same S-suffix threshold (2.93V), but active-high push-pull RESET and independent PFI/PFO - no RST_IN1/RST_IN2 inputs | Single-supply supervision only; lacks triple-voltage capability of MAX6702ALKA+T | Choose for cost-sensitive designs where only VCC monitoring is required and space is constrained |
Compared with MAX6702MKA+T, MAX6702ALKA+T provides tighter voltage margin for 3.3V systems; compared with MAX6706AKA+T, it adds dual adjustable inputs for multi-rail validation - essential for complex industrial controllers requiring full power-domain visibility.
Availability
MAX6702ALKA+T is available at Aetrix Electronics and suitable for white goods, telecommunications infrastructure, industrial PLCs, networking equipment, and intelligent instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX6702ALKA+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, communications, and computing applications.
The MAX6701–MAX6708 family targets compact, high-reliability µP supervision in space-constrained systems - delivering integrated reset, watchdog, and power-fail functions in sub-3mm² SOT23 packages.
FAQ
What is the exact reset threshold voltage for MAX6702ALKA+T?
The MAX6702ALKA+T has a nominal VCC reset threshold of 2.93V (S-suffix), with guaranteed tolerance of ±3% over -40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table under "VCC Reset Threshold" for MAX670_S/MAX670_AS variants. It applies exclusively to the VCC pin; RST_IN1 and RST_IN2 use the internal 0.62V reference for user-defined thresholds.
Does MAX6702ALKA+T support triple-voltage monitoring?
Yes, MAX6702ALKA+T supports triple-voltage monitoring: VCC (2.93V fixed threshold), RST_IN1, and RST_IN2. Both RST_IN1 and RST_IN2 are high-impedance inputs referenced to the internal 0.62V comparator threshold - enabling external resistor dividers to set custom trip points for secondary supplies like +1.8V or +2.5V rails.
What is the function of the WDO pin on MAX6702ALKA+T?
The WDO pin on MAX6702ALKA+T is an active-low watchdog output that asserts low on watchdog timeout (1.6s typ), VCC undervoltage, or RST_IN1/RST_IN2 undervoltage. Unlike non-A versions, WDO deasserts immediately upon a valid WDI edge or MR pull-low - making it suitable for NMI-triggered diagnostics without latch-up risk.
Can MAX6702ALKA+T operate down to 1.0V supply voltage?
Yes, MAX6702ALKA+T guarantees RESET output validity down to VCC = 1.0V. At VCC ≥ 1.0V, the active-high RESET output maintains VOH ≥ 0.8 × VCC when not asserted and VOL ≤ 0.4V when asserted - ensuring robust interface with ultra-low-voltage µPs and FPGAs during brownout recovery.
How does the power-fail comparator work on MAX6702ALKA+T?
The power-fail comparator in MAX6702ALKA+T uses PFI (input) and PFO (output) with an internal 0.62V reference. When voltage at PFI drops below 0.62V - set by an external resistor divider on a secondary supply - PFO asserts low within 1µs. This enables early warning of supply collapse, allowing µPs to save state or disable loads before main VCC fails.
MAX6702ALKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 4.63V, Adj, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6702ALKA+T FAQ
1.How can I place an order for MAX6702ALKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6702ALKA+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 MAX6702ALKA+T reliable?
The price and inventory of MAX6702ALKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6702ALKA+T is usually 5 days.
3.What payment methods are accepted for MAX6702ALKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6702ALKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6702ALKA+T?
MAX6702ALKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6702ALKA+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 MAX6702ALKA+T?
For technical support, including MAX6702ALKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6702ALKA+T requirements.
6.How does Aetrix verify that MAX6702ALKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6702ALKA+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 MAX6702ALKA+T meets industry standards.
7.What is the process for return or replacement of MAX6702ALKA+T?
All MAX6702ALKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6702ALKA+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 MAX6702ALKA+T part is unused and in its original packaging.
Return procedure for MAX6702ALKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6702ALKA+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…
