My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX706RCPA+
- Part No.:
- MAX706RCPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX706RCPA+.pdf
- Description:
- IC SUPERVISOR
- Quantity:
- Payment:
- Shipping:
Inventory:4,683
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX706RCPA+ from Maxim Integrated is an active-low microprocessor supervisory circuit designed for +3V to +5V systems, providing power-on reset, watchdog timer (1.6s timeout), 1.25V power-fail comparator input, and debounced manual-reset input. It asserts RESET when VCC falls below 2.63V or MR is pulled low, with guaranteed reset assertion down to VCC = 1V - used in battery-powered instruments and portable controllers requiring reliable brownout protection.
For engineers reviewing the MAX706RCPA+ datasheet, MAX706RCPA+ pinout, MAX706RCPA+ application, or MAX706RCPA+ equivalent, key selection criteria include its 2.63V reset threshold, 8-pin PDIP package, 200ms reset pulse width, 100µA quiescent current, and compatibility with TTL/CMOS logic levels across 2.7V–5.5V supply range.
Technical Context
The MAX706RCPA+ integrates a precision voltage monitor with 20mV hysteresis, a monostable watchdog timer triggered by WDI transitions, and a dedicated 1.25V reference-based power-fail comparator (PFI/PFO). Its internal 70µA MR pull-up enables direct pushbutton interfacing without external components.
RESET output remains asserted for ≥200ms after VCC rises above 2.63V or MR release, and the watchdog function cannot be disabled - unlike MAX706AR/AS/AT variants. The device operates over 0°C to +70°C and guarantees valid RESET down to VCC = 1V, supporting robust power sequencing in low-voltage embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (VCC falling); ensures reliable reset initiation before µP supply dropout in +3V systems |
| Reset Pulse Width | 200ms minimum; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s ±0.65s; detects firmware hangs without requiring software intervention |
| Quiescent Current | 100µA max at VCC = 5.5V; enables long battery life in portable equipment |
| Supply Voltage Range | 2.7V to 5.5V; supports dual-supply operation from +3V batteries or +5V wall adapters |
| Power-Fail Threshold | 1.25V (PFI input); allows configurable early-warning detection of unregulated supply collapse |
| MR Input Compatibility | TTL/CMOS; accepts direct connection to µP GPIO or mechanical switch without level-shifting |
Pinout & Package
MAX706RCPA+ is housed in an 8-pin plastic DIP (PDIP) package (package code P8-1), lead-free compliant, with 0.3" body width and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-Low Manual Reset Input | Pull low to force reset; internally pulled up with 70µA current; TTL/CMOS compatible |
| 2 (VCC) | Positive Supply Input | Accepts 2.7V–5.5V; powers all internal circuits including reset generator and watchdog |
| 3 (GND) | Ground Reference | Common return path for all analog and digital functions; must be low-impedance |
| 4 (PFI) | Power-Fail Comparator Input | Compares external voltage against 1.25V reference; triggers PFO when below threshold |
| 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 transition every 1.6s to prevent WDO assertion; no disable capability |
| 7 (RESET) | Active-Low Reset Output | Open-drain output; sinks current during reset; requires external pull-up for µP interface |
| 8 (WDO) | Active-Low Watchdog Output | Asserts independently of RESET on timeout or VCC brownout; can drive NMI or MR |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing undefined µP states |
| 200ms reset time delay | Meets µP power-on timing requirements without external RC networks |
| Debounced manual-reset input | Eliminates need for external debounce circuitry; 500ns minimum MR pulse width at VCC = 3V |
| 1.25V precision PFI threshold | Enables accurate monitoring of auxiliary supplies (e.g., unregulated DC rails) via resistive divider |
| 100µA quiescent current | Reduces standby power consumption in battery-critical applications such as handheld test equipment |
Applications
| Battery-Powered Instruments | Portable Controllers |
|---|---|
Use Scenario: Handheld multimeter operating from single 3.7V Li-ion cell with AC adapter backup. IC Role / Device Role / Timing Role: Supervisory IC monitors main supply and triggers reset if voltage drops below 2.63V during battery discharge or adapter disconnect. Use Value: Prevents corrupted measurements or flash writes during brownout by guaranteeing 200ms reset hold time and asserting RESET down to VCC = 1V. |
Use Scenario: Industrial PLC module powered from 3.3V rail with watchdog supervision of real-time control loop. IC Role / Device Role / Timing Role: MAX706RCPA+ watches µP activity via WDI and asserts WDO on 1.6s timeout to trigger fail-safe shutdown. Use Value: Enables deterministic recovery from firmware lockup without requiring external watchdog IC or µP-level software polling. |
| Critical µP Power Monitoring | Computers & Embedded Systems |
Use Scenario: Medical diagnostic device requiring fail-safe boot sequence under variable input conditions. IC Role / Device Role / Timing Role: Provides power-on reset, brownout detection, and manual reset - all synchronized to same 2.63V threshold. Use Value: Eliminates risk of partial initialization by ensuring µP remains held in reset until VCC stabilizes above threshold for ≥200ms. |
Use Scenario: Compact network appliance with dual-supply design (3.3V logic, 5V I/O) and pushbutton recovery. IC Role / Device Role / Timing Role: Uses MR input for hardware-initiated reboot and PFI/PFO to monitor auxiliary 5V rail for early power-fail warning. Use Value: Allows graceful OS shutdown upon PFO assertion, while RESET ensures clean cold boot after MR press. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RCSA+ | Same functionality and specs, but in 8-pin SO package (S8-2) instead of PDIP | Preferred for surface-mount PCB assembly; identical timing and electrical behavior | Select MAX706RCSA+ for automated SMT production; MAX706RCPA+ for through-hole prototyping or legacy board repair |
| MAX706ARCPA+ | Identical pinout and package, but with watchdog disable feature (WDI high-Z disables timer) | Required where watchdog must be disabled during debug or low-power sleep modes | Choose MAX706ARCPA+ only if WDI disable capability is needed; otherwise MAX706RCPA+ offers simpler, fixed-function reliability |
Compared with MAX706RCSA+, MAX706RCPA+ provides identical supervisory functionality in a through-hole package for ease of hand-soldering and socketing, while MAX706ARCPA+ adds watchdog disable - a feature absent in MAX706RCPA+ - making it suitable for applications requiring dynamic watchdog control.
Availability
MAX706RCPA+ is available at Aetrix Electronics and suitable for battery-powered instruments, portable controllers, and critical µP power monitoring requiring stable component supply across industrial temperature ranges and long-lifecycle designs.
Supply support for MAX706RCPA+ 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, medical, and communications systems.
The MAX706 family delivers low-cost, integrated µP supervisory functions - reset generation, watchdog timing, and power-fail detection - optimized for +3V/+3.3V embedded systems where reliability and minimal external components are essential.
FAQ
What is the reset threshold voltage of the MAX706RCPA+?
The MAX706RCPA+ has a fixed reset threshold of 2.63V (VCC falling), with 20mV hysteresis. This value is factory-trimmed and guaranteed over temperature (0°C to +70°C). It ensures reliable reset assertion before most +3V microprocessors enter undefined operating regions, and the MAX706RCPA+ guarantees RESET remains asserted down to VCC = 1V.
Does the MAX706RCPA+ support watchdog timer disable?
No, the MAX706RCPA+ does not support watchdog timer disable. Its WDI input is always active - a missing edge within 1.6s will assert WDO. This differs from the MAX706ARCPA+, where leaving WDI open or connecting it to a high-impedance tri-state output disables the watchdog. The MAX706RCPA+ is intended for applications requiring unconditional watchdog supervision.
What package type is used by the MAX706RCPA+?
The MAX706RCPA+ uses an 8-pin plastic DIP (PDIP) package with 0.3" body width (package code P8-1). It is lead-free compliant and designed for through-hole mounting. Pin-compatible alternatives like MAX706RCSA+ use the 8-pin SO package (S8-2) for surface-mount applications.
Can the MAX706RCPA+ monitor voltages other than VCC?
Yes, the MAX706RCPA+ includes a dedicated PFI (Power-Fail Input) pin referenced to an internal 1.25V comparator. By connecting PFI to a resistive divider from an auxiliary supply (e.g., unregulated DC or negative rail), users can configure early-warning detection at custom thresholds - independent of the 2.63V VCC reset level. The MAX706RCPA+ PFO output then signals the condition.
What is the minimum pulse width required on the MR input of the MAX706RCPA+?
The MAX706RCPA+ requires a minimum MR pulse width of 500ns when VCC = 3.0V and 150ns when VCC = 5.0V. The internal 70µA pull-up ensures reliable detection of short mechanical switch closures without external debouncing. This specification is verified in the Electrical Characteristics table and applies directly to the MAX706RCPA+ across its full operating temperature range.
MAX706RCPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX706RCPA+ FAQ
1.How can I place an order for MAX706RCPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706RCPA+ 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 MAX706RCPA+ reliable?
The price and inventory of MAX706RCPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706RCPA+ is usually 5 days.
3.What payment methods are accepted for MAX706RCPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706RCPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706RCPA+?
MAX706RCPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706RCPA+ 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 MAX706RCPA+?
For technical support, including MAX706RCPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706RCPA+ requirements.
6.How does Aetrix verify that MAX706RCPA+ is sourced from the original manufacturer or authorized distributors?
All MAX706RCPA+ 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 MAX706RCPA+ meets industry standards.
7.What is the process for return or replacement of MAX706RCPA+?
All MAX706RCPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX706RCPA+, 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 MAX706RCPA+ part is unused and in its original packaging.
Return procedure for MAX706RCPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX706RCPA+ 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…
