My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6708ZKA
- Part No.:
- MAX6708ZKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6708ZKA.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:249
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6708ZKA from Maxim Integrated is a low-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, providing dual active-low/active-high push-pull reset outputs, a 0.62V power-fail comparator input (PFI), and a dedicated power-fail output (PFO). It monitors a single supply voltage with a 2.32V reset threshold (Z suffix), guarantees valid reset down to VCC = 1V, and delivers a 140ms reset timeout delay. It is used in automotive systems and critical µP power monitoring where reliable brownout detection and manual reset coordination are required.
For engineers reviewing the MAX6708ZKA datasheet, MAX6708ZKA pinout, MAX6708ZKA application, or MAX6708ZKA equivalent, this page provides verified functional specifications, confirmed pin assignments, real-world use cases for dual-reset supervision, and validated alternative parts for supply-chain continuity and design flexibility.
Technical Context
The MAX6708ZKA implements a dual-output reset generator with complementary active-low and active-high push-pull RESET signals-both asserted simultaneously during VCC undervoltage, MR assertion, or brownout. Its internal 0.62V reference enables precise PFI-based early power-fail warning, with PFO asserting low when PFI falls below threshold.
Unlike watchdog-equipped variants (e.g., MAX6704), the MAX6708ZKA omits the watchdog timer and WDI/WDO circuitry entirely-confirmed by functional diagram Figure 2 and Selector Guide. It supports triple-voltage monitoring only in MAX6701–MAX6703(A) variants; MAX6708ZKA monitors one supply (VCC) exclusively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V (Z suffix), ±3% over -40°C to +125°C - sets precise brownout detection point for 2.5V system rails |
| Reset Timeout Delay | 140ms (typ), 120–300ms over temperature - ensures µP initialization completes before release |
| Supply Voltage Range | 1.2V to 5.5V - enables operation down to ultra-low VCC while maintaining guaranteed reset validity |
| PFI Threshold | 0.62V (typ), 593–642mV over temperature - allows accurate external voltage-divider-based power-fail warning |
| Output Type | Dual active-low/active-high push-pull RESET - eliminates need for external inverters or pull resistors |
| Quiescent Current | 6µA (typ) at VCC < 3.6V - supports battery-backed or low-power always-on supervision |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial embedded environments |
Pinout & Package
MAX6708ZKA is housed in an 8-pin SOT23-8 package (JEDEC MO-178 BA variant), measuring 3.00mm × 1.75mm × 1.30mm, with gull-wing leads and lead-free plating available (replace "-T" with "+T" for RoHS-compliant ordering).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR | Active-low manual reset input with internal 50kΩ pullup - debounced by reset timeout; forces dual RESET assertion when pulled low |
| 2 | VCC | Main supply input and primary reset monitor - powers internal comparators and push-pull outputs |
| 3 | GND | Ground reference for all analog and digital circuitry - must be low-impedance for stable threshold accuracy |
| 4 | PFI | Power-fail input tied to 0.62V internal reference - accepts external resistor divider to set custom trip voltage for secondary rails |
| 5 | PFO | Active-low power-fail output (push-pull) - asserts low when PFI drops below 0.62V, usable as interrupt or secondary reset trigger |
| 6 | N.C. | No connection - not internally bonded; must remain unconnected on PCB |
| 7 | RESET | Active-high push-pull reset output - complements pin 8; high during normal operation, low only during reset conditions |
| 8 | RESET | Active-low push-pull reset output - low during power-up, brownout, or MR assertion; high otherwise |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary RESET outputs | Simultaneous active-low and active-high push-pull signals eliminate external logic inversion and reduce BOM count |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset state even during deep brownout or battery sag conditions |
| 0.62V precision PFI reference | Enables accurate early-warning power-fail detection on auxiliary supplies (e.g., 3.3V I/O rail) using simple resistor dividers |
| Immunity to short VCC transients | Rejects <100ns glitches on VCC, preventing spurious resets in electrically noisy automotive or industrial environments |
| Low 6µA quiescent current | Extends battery life in always-on monitoring applications such as telematics or remote sensors |
Applications
| Automotive Body Control Module | Industrial PLC CPU Board |
|---|---|
|
Use Scenario: Monitoring 2.5V core supply and 3.3V I/O rail in under-hood ECU with extended temperature range requirements. IC Role / Device Role / Timing Role: Primary supervisory IC generating synchronized active-low and active-high reset signals for dual-rail µP startup and brownout recovery. Use Value: Dual RESET outputs eliminate external inverters; 125°C rating ensures reliability in engine compartment mounting. |
Use Scenario: Ensuring deterministic restart of ARM-based controller after AC line interruption in programmable logic controller. IC Role / Device Role / Timing Role: Single-supply supervisor with PFI-driven early warning to initiate graceful shutdown before main supply collapse. Use Value: 0.62V PFI threshold enables precise trip point on 5V auxiliary rail; 140ms timeout meets IEC 61000-4-11 immunity timing requirements. |
| White Goods Main Controller | Telecom Power Management Unit |
|
Use Scenario: Supervising 3.3V MCU supply in washing machine control board exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Reset generator with manual reset input (MR) for service-mode entry and factory calibration reset. Use Value: Internal 50kΩ MR pullup reduces external component count; -40°C to +125°C rating covers full appliance operating envelope. |
Use Scenario: Providing fail-safe reset coordination between FPGA configuration and DSP subsystem in optical line terminal. IC Role / Device Role / Timing Role: Dual-output supervisor ensuring simultaneous reset assertion across multiple voltage domains during power sequencing faults. Use Value: Complementary RESET signals simplify timing alignment in multi-chip power-up sequences without added propagation delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6704ZKA | Includes 1.6s watchdog timer and WDI input; no N.C. pin - adds fault-detection capability but increases complexity | Required where µP activity monitoring is mandated (e.g., safety-critical firmware execution verification) | Select MAX6704ZKA only if watchdog functionality is needed; MAX6708ZKA is simpler and lower-risk for pure voltage supervision |
| TPS3808G33DBVR | Single active-low open-drain reset; 3.3V fixed threshold; no PFI/PFO; 200ms timeout; 1.8–6V VCC range | Lacks dual-output and power-fail warning - suitable only for basic single-rail reset without early warning capability | Choose TPS3808G33DBVR for cost-sensitive, single-threshold designs without PFI dependency; MAX6708ZKA offers superior feature integration |
Compared with MAX6704ZKA, MAX6708ZKA removes watchdog circuitry to reduce failure modes and simplify validation; compared with TPS3808G33DBVR, it delivers dual RESET polarity and integrated PFI/PFO-enabling more robust system-level power management with fewer external components.
Availability
MAX6708ZKA is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC CPU boards, white goods main controllers, and telecom power management units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6708ZKA 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 delivers compact, low-power µP supervision with configurable reset thresholds and integrated power-fail detection-targeting space-constrained embedded systems needing high reliability under voltage stress.
FAQ
What is the reset threshold voltage for MAX6708ZKA?
The MAX6708ZKA has a nominal VCC reset threshold of 2.32V, corresponding to the "Z" suffix in its part number. This value is specified over the full operating temperature range (-40°C to +125°C) with ±3% tolerance, making it suitable for monitoring 2.5V system rails with margin for brownout detection. The threshold is factory-trimmed and does not require external adjustment.
Does MAX6708ZKA include a watchdog timer function?
No, MAX6708ZKA does not include a watchdog timer. It is explicitly defined in the datasheet as "the same as the MAX6704 but without the watchdog timer function." Unlike MAX6704ZKA or MAX6705ZKA, MAX6708ZKA lacks WDI and WDO pins (pin 6 is N.C.), and its functional diagram shows no watchdog circuitry-making it a dedicated voltage supervisor only.
What are the functions of the two RESET pins on MAX6708ZKA?
MAX6708ZKA provides dual complementary reset outputs: pin 7 is active-high RESET (goes high during normal operation, low during reset), and pin 8 is active-low RESET (goes low during reset, high otherwise). Both are push-pull and assert/deassert simultaneously, enabling direct interface with µPs requiring either polarity without external inverters or pull resistors.
How is the power-fail warning implemented on MAX6708ZKA?
MAX6708ZKA implements power-fail warning via the PFI (pin 4) and PFO (pin 5) pair. PFI connects to an external resistor divider on a monitored supply (e.g., 3.3V rail); when the divided voltage falls below the internal 0.62V reference, PFO (open-drain or push-pull) asserts low. This provides early warning before main VCC collapse, allowing µP to initiate orderly shutdown.
What is the purpose of the N.C. pin on MAX6708ZKA?
Pin 6 on MAX6708ZKA is designated N.C. (No Connection) and is not internally bonded. It must remain unconnected on the PCB layout-neither routed nor terminated. This pin is reserved for other variants in the MAX6701–MAX6708 family (e.g., WDI on MAX6704) but serves no function in MAX6708ZKA and should not be used for grounding, decoupling, or any other purpose.
MAX6708ZKA 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:
- 2.32V, 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
MAX6708ZKA FAQ
1.How can I place an order for MAX6708ZKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6708ZKA 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 MAX6708ZKA reliable?
The price and inventory of MAX6708ZKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6708ZKA is usually 5 days.
3.What payment methods are accepted for MAX6708ZKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6708ZKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6708ZKA?
MAX6708ZKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6708ZKA 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 MAX6708ZKA?
For technical support, including MAX6708ZKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6708ZKA requirements.
6.How does Aetrix verify that MAX6708ZKA is sourced from the original manufacturer or authorized distributors?
All MAX6708ZKA 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 MAX6708ZKA meets industry standards.
7.What is the process for return or replacement of MAX6708ZKA?
All MAX6708ZKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6708ZKA, 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 MAX6708ZKA part is unused and in its original packaging.
Return procedure for MAX6708ZKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6708ZKA 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…
