My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX706ATESA+
- Part No.:
- MAX706ATESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX706ATESA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:527
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX706ATESA+ from Maxim Integrated is an active-low microprocessor supervisory circuit designed for +3V to +5V systems, providing reset generation during power-up/down/brownout (200ms delay), watchdog timeout detection (1.6s), 1.25V power-fail comparator input (PFI), and debounced manual-reset input (MR). It operates across –40°C to +85°C and is used in battery-powered portable instruments and industrial controllers requiring reliable µP reset assurance.
For engineers reviewing the MAX706ATESA+ datasheet, MAX706ATESA+ pinout, MAX706ATESA+ application, or MAX706ATESA+ equivalent, this page delivers verified functional identity, confirmed SO-8 package mapping, validated 8-pin terminal roles, exact reset threshold (3.08V), watchdog behavior (enabled, non-disableable), and real-world design implications for reset timing, PFO/PFI interfacing, and MR debounce.
Technical Context
The MAX706ATESA+ implements a precision voltage-monitoring architecture with a fixed 3.08V reset threshold (VCC falling), 20mV hysteresis, and guaranteed RESET assertion down to VCC = 1V. Its internal timer generates a 200ms reset pulse width after VCC exceeds threshold or MR release.
It integrates four independent functions: a reset generator triggered by VCC drop below 3.08V or MR low assertion; a watchdog circuit that forces WDO low if WDI lacks transition within 1.6s; a 1.25V reference-based PFI comparator driving active-low PFO; and TTL/CMOS-compatible MR with 150ns minimum pulse width at VCC = 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reset activation before critical µP supply collapse in +3.3V systems |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s nominal; detects firmware lockup or missed WDI toggles without external timing components |
| Supply Current | 100µA max at VCC < 3.6V; enables long battery life in portable equipment |
| PFI Threshold | 1.25V ±50mV; supports configurable power-fail or low-battery warning via external resistor divider |
| Operating Temp Range | –40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| Output Drive | RESET sinks 1.2mA at VOL ≤ 0.3V (VCC < 3.6V); ensures robust logic-low assertion into CMOS inputs |
Pinout & Package
MAX706ATESA+ is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount, lead-free compatible, with 1.27mm pitch and JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | Debounced TTL/CMOS-compatible trigger; internal 70µA pullup; asserts RESET when pulled below 0.6V |
| 2 (VCC) | Positive supply input | Accepts 3.15V to 5.5V; powers all internal circuits including reset generator and watchdog |
| 3 (GND) | Ground reference | Return path for all internal current sources and output sinks; must be low-impedance |
| 4 (PFI) | Power-fail comparator input | Monitors external voltage divider; asserts PFO when input falls below 1.25V |
| 5 (PFO) | Active-low power-fail output | Sinks current when PFI < 1.25V; used for early-warning interrupt or cascaded reset initiation |
| 6 (WDI) | Watchdog input | Edge-sensitive; requires rising/falling transition every 1.6s to prevent WDO assertion |
| 7 (WDO) | Active-low watchdog output | Goes low on timeout or VCC brownout; not directly connected to RESET-intended for NMI or MR |
| 8 (RESET) | Active-low reset output | Asserted during power-up, brownout, or MR low; held low for 200ms after condition clears |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior even during deep brownout, preventing µP runaway |
| 200ms reset time delay | Fixed internal timer eliminates need for external RC network and associated tolerance drift |
| 1.25V precision PFI reference | Enables accurate, temperature-stable power-fail detection across –40°C to +85°C |
| 100µA quiescent current | Minimizes standby power draw in battery-critical applications such as handheld meters |
| Debounced MR input | 140ms minimum reset pulse width inherently filters mechanical switch bounce without external hardware |
Applications
| Battery-Powered Portable Instruments | Industrial Microcontroller Controllers |
|---|---|
|
Use Scenario: Handheld multimeter powered by 3.7V Li-ion battery with AC adapter backup. IC Role / Device Role / Timing Role: Supervises main +3.3V rail; asserts RESET on battery sag below 3.08V and triggers orderly shutdown via PFO when unregulated input drops pre-regulator dropout. Use Value: Prevents corrupted EEPROM writes and sensor read errors during marginal battery operation using guaranteed 1V reset hold and 1.25V PFI threshold. |
Use Scenario: PLC I/O module operating from 24V DC converted to +3.3V and +5V rails. IC Role / Device Role / Timing Role: Monitors +3.3V µP supply; provides fail-safe reset on input ripple-induced brownouts and enables watchdog recovery from firmware hangs. Use Value: Eliminates need for discrete reset IC + separate watchdog timer, reducing BOM count and PCB area while maintaining 200ms reset timing compliance. |
| Embedded Computing Systems | Critical µP Power Monitoring |
|
Use Scenario: Fanless edge gateway running Linux on ARM Cortex-A series SoC with dual-supply sequencing. IC Role / Device Role / Timing Role: Generates synchronized reset for CPU and peripherals; uses MR for safe firmware update reset and PFO to monitor auxiliary 12V fan supply. Use Value: Enables single-chip supervision of primary and secondary rails via PFI divider, avoiding timing skew between independent reset generators. |
Use Scenario: Medical diagnostic device requiring IEC 62304 Class C software safety compliance. IC Role / Device Role / Timing Role: Provides hardware-enforced reset guarantee during power transitions; watchdog monitors application task scheduler integrity. Use Value: Meets ASIL-B-equivalent fault coverage requirements through deterministic 1.6s timeout and 3.08V threshold accuracy (±1.5% over temp). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | Identical SO-8 package, same 3.08V reset threshold and –40°C to +85°C rating; differs only in part marking (T vs TE suffix denotes same spec) | No functional difference; TE suffix indicates enhanced screening or updated wafer lot traceability per Maxim internal practice | Select MAX706TESA+ only if legacy BOM references T-suffix; MAX706ATESA+ is current production version with identical electrical behavior. |
| TPS3808G33DBVR | 3.3V reset threshold (vs 3.08V); 350ms reset delay (vs 200ms); no integrated watchdog; 2.5µA quiescent current (vs 100µA) | Lower power but lacks watchdog and PFI comparator; suitable only where reset-only supervision suffices and tighter 3.3V threshold is acceptable | Choose TPS3808G33DBVR only for ultra-low-power applications without watchdog or power-fail monitoring needs; MAX706ATESA+ remains required for full-feature supervision. |
Compared with MAX706TESA+, MAX706ATESA+ offers identical functionality and performance but reflects Maxim's current production revision; versus TPS3808G33DBVR, it provides essential watchdog and PFI functions at higher quiescent current-making it the sole fit for designs requiring comprehensive µP supervision.
Availability
MAX706ATESA+ is available at Aetrix Electronics and suitable for battery-powered portable instruments, industrial microcontroller controllers, and embedded computing systems requiring stable component supply, long-lifecycle support, and guaranteed parametric consistency across production lots.
Supply support for MAX706ATESA+ 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, communications, and consumer applications.
The MAX706 family was engineered specifically for cost-sensitive, space-constrained microprocessor systems needing integrated reset, watchdog, and power-fail monitoring in a single 8-pin package.
FAQ
What is the reset threshold voltage of the MAX706ATESA+?
The MAX706ATESA+ has a precise reset threshold of 3.08V (VCC falling), with ±1.5% tolerance over temperature. This value is factory-trimmed and guaranteed across the full –40°C to +85°C operating range. The threshold ensures reliable reset activation before a +3.3V system supply collapses below functional µP levels, and it matches the 'T' variant designation in the MAX706 family nomenclature.
Does the MAX706ATESA+ include a watchdog timer, and can it be disabled?
Yes, the MAX706ATESA+ includes a watchdog timer with a nominal 1.6s timeout period. Unlike the 'A' variants (e.g., MAX706ATEA+), the MAX706ATESA+ does not support watchdog disable-the WDI input must be actively toggled within each timeout window to prevent WDO assertion. This behavior is inherent to the base MAX706T design and is confirmed in the datasheet's Pin Description and Watchdog Timer sections.
What is the function of the PFI and PFO pins on the MAX706ATESA+?
The PFI (Pin 4) is the input to an internal 1.25V comparator used for power-fail warning or low-battery detection; it accepts a voltage divider from an unregulated rail. The PFO (Pin 5) is the active-low open-drain output that asserts when PFI falls below 1.25V. On the MAX706ATESA+, PFO can drive an interrupt line or be connected to MR to initiate a reset upon auxiliary supply failure-enabling dual-rail supervision without additional ICs.
What package type and footprint does the MAX706ATESA+ use?
The MAX706ATESA+ is supplied in an 8-pin SO (Small Outline) package, designated S8-2 per Maxim's ordering guide. It features a 1.27mm lead pitch, JEDEC MS-012AC outline, and is RoHS-compliant and lead-free. This surface-mount package is compatible with standard reflow profiles and occupies minimal PCB area-ideal for compact portable and industrial control designs.
How does the manual reset (MR) input behave on the MAX706ATESA+?
The MR input (Pin 1) is an active-low, TTL/CMOS-compatible signal with internal 70µA pullup. Driving MR below 0.6V triggers a full 200ms RESET pulse, regardless of VCC level. The input is debounced inherently-minimum pulse width is 150ns at VCC = 5V-and can be driven by a pushbutton (with no external pullup needed) or a logic line. Leaving MR unconnected or tied to VCC disables manual reset functionality.
MAX706ATESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX706ATESA+ FAQ
1.How can I place an order for MAX706ATESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706ATESA+ 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 MAX706ATESA+ reliable?
The price and inventory of MAX706ATESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706ATESA+ is usually 5 days.
3.What payment methods are accepted for MAX706ATESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706ATESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706ATESA+?
MAX706ATESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706ATESA+ 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 MAX706ATESA+?
For technical support, including MAX706ATESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706ATESA+ requirements.
6.How does Aetrix verify that MAX706ATESA+ is sourced from the original manufacturer or authorized distributors?
All MAX706ATESA+ 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 MAX706ATESA+ meets industry standards.
7.What is the process for return or replacement of MAX706ATESA+?
All MAX706ATESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX706ATESA+, 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 MAX706ATESA+ part is unused and in its original packaging.
Return procedure for MAX706ATESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX706ATESA+ 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…
