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Analog Devices Inc./Maxim Integrated MAX800MCPE+
- Part No.:
- MAX800MCPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX800MCPE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,253
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Product details
Overview
MAX800MCPE+ from Maxim Integrated is a microprocessor supervisory circuit designed for critical 5V power monitoring and system reset control in embedded controllers and intelligent instruments. It features a 4.4V typical reset threshold, 200ms power-up reset timeout, 30μA operating supply current, and guaranteed RESET assertion down to VCC = 1V - enabling reliable brownout protection in industrial and computing applications.
For engineers reviewing the MAX800MCPE+ datasheet, MAX800MCPE+ pinout, MAX800MCPE+ application, or MAX800MCPE+ equivalent, key selection criteria include its ±2% power-fail accuracy, battery-switchover capability with BATT ON indicator, chip-enable gating with ≤10ns propagation delay, and dual active-reset outputs (RESET and RESET) supporting both high- and low-active μP interfaces.
Technical Context
The MAX800MCPE+ integrates a precision voltage monitor, watchdog timer with selectable timeout (100ms/1.6s), internal oscillator or external clock support via OSC IN/OSC SEL, and bidirectional VCC/VBATT switchover logic. Its dual-reset architecture provides both active-low RESET and active-high open-drain RESET outputs, each valid across VCC = 0–5.5V when VBATT ≥ 2V.
Chip-enable gating uses a 75Ω series transmission gate between CE IN and CE OUT, with disable-on-reset behavior and 15μs forced hold time. The power-fail comparator (PFI/PFO) operates independently with 1.25V threshold and ±25nA input leakage, while WDI implements three-level watchdog detection with internal 1.6V bias when floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.40V typical (MAX800M variant); ensures reliable reset assertion during 5V supply brownout |
| Reset Timeout Period | 200ms typical on power-up; guarantees μP remains held in reset until stable VCC is confirmed |
| Supply Current (Operating) | 30μA typical; enables low-power operation in always-on monitoring circuits |
| VBATT Switchover Accuracy | ±2% power-fail accuracy (MAX800M); supports precise low-battery or early power-loss warning |
| CE Propagation Delay | ≤10ns max; allows safe use with high-speed μPs without timing violation on memory access |
| RESET Output Validity | Valid down to VCC = 1V; maintains deterministic reset state even during deep brownout |
| Watchdog Timeout (Long) | 1.6s nominal; configurable via OSC SEL/OSC IN for flexible firmware activity monitoring |
Pinout & Package
MAX800MCPE+ is supplied in a 16-pin plastic DIP package (0.300" wide), RoHS-compliant with + suffix, rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-backup input | Connects to backup capacitor or battery; enables seamless VCC-to-VBATT switchover when VCC falls below reset threshold |
| 2 VOUT | Output supply voltage | Switched output sourcing up to 250mA; connects to VCC in normal mode, VBATT in backup mode |
| 3 VCC | Main 5V supply input | Regulated 4.5V–5.5V input; powers internal circuitry and drives VOUT via PMOS switch + diode |
| 4 GND | Ground reference | 0V return for all signals; must be low-impedance connection for accurate voltage monitoring |
| 5 BATT ON | Battery-on status indicator | Active-high open-drain output signaling VBATT is active; sinks 3.2mA at 0.1V saturation |
| 6 LOW LINE | Reset threshold comparator output | Buffered version of reset comparator; goes low when VCC < 4.4V; used for system status indication |
| 7 OSC IN | Oscillator timing input | Accepts external capacitor or clock signal to configure watchdog/reset timeout periods |
| 8 OSC SEL | Oscillator select control | Configures internal oscillator (floating/high) or external timing (low); has 10μA internal pull-up |
| 9 PFI | Power-fail comparator input | Non-inverting input referenced to 1.25V; used for low-battery or early power-loss detection |
| 10 PFO | Power-fail comparator output | Open-drain output asserting low when PFI < 1.25V; independent of reset/watchdog functions |
| 11 WDI | Watchdog input | Three-level input (high/low/floating); resets watchdog timer on transition; floating disables function |
| 12 CE OUT | Chip-enable gated output | Passes CE IN only when VCC > reset threshold; disabled during reset to prevent RAM corruption |
| 13 CE IN | Chip-enable gated input | High-impedance during reset; presents 75Ω series resistance when enabled |
| 14 WDO | Watchdog output | Asserts low on watchdog timeout; returns high on next WDI transition; TTL-compatible output |
| 15 RESET | Active-low reset output | Open-drain, sinks 3.2mA at 0.1V; asserted when VCC < 4.4V or watchdog timeout occurs |
| 16 RESET | Active-high reset output | Open-drain, inverse of RESET; high-impedance when RESET is active, pulled to VOUT otherwise |
Key Features
| Feature | Design Value |
|---|---|
| Dual active-reset outputs | Simultaneous RESET (active-low) and RESET (active-high) support both μP reset polarity requirements without external inverters |
| Guaranteed reset validity to 1V | Enables robust brownout recovery in systems where VCC may dip below 2V before shutdown |
| ±2% power-fail accuracy | Supports precise low-battery detection and early power-loss warning with minimal calibration overhead |
| Chip-enable gating with ≤10ns delay | Prevents spurious writes to CMOS RAM during power transitions while maintaining compatibility with fast μPs |
| Configurable watchdog timeout | 100ms or 1.6s long timeout selectable via OSC SEL/OSC IN, enabling flexible firmware supervision strategies |
| Battery-switchover with BATT ON indicator | Provides explicit hardware signal confirming backup power activation, simplifying system-level power management |
Applications
| Industrial Programmable Logic Controller (PLC) | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Maintains deterministic reset state during AC line sags and battery-backed memory retention in field-deployed PLCs. IC Role / Device Role / Timing Role: Supervisory circuit providing power-fail detection, watchdog supervision, and VCC/VBATT switchover control. Use Value: Prevents corrupted I/O configuration and preserves nonvolatile memory contents during extended brownout events. |
Use Scenario: Ensures safe shutdown and data preservation during unexpected mains loss in portable diagnostic devices. IC Role / Device Role / Timing Role: Dual-reset supervisor with ±2% PFI accuracy and battery switchover for critical data logging. Use Value: Guarantees uninterrupted operation from backup capacitor for ≥200ms, meeting IEC 60601-1 safety-critical timing requirements. |
| Telecom Remote Terminal Unit (RTU) | Automotive Infotainment Head Unit |
Use Scenario: Monitors 5V rail integrity and prevents firmware lockup in outdoor RTUs exposed to wide temperature and voltage variation. IC Role / Device Role / Timing Role: Microprocessor supervisor with 1.6s watchdog and 200ms reset timeout, operating from -40°C to +85°C. Use Value: Eliminates need for external RC timing components and reduces BOM count while meeting Telcordia GR-63-CORE reliability specs. |
Use Scenario: Provides fail-safe reset coordination between MCU, audio codec, and display controller during vehicle ignition cycling. IC Role / Device Role / Timing Role: Centralized reset manager with CE gating to isolate memory during power transients. Use Value: Prevents EEPROM write corruption during cold crank (4.5V–5.5V VCC range) and ensures deterministic boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX800LCPE+ | 4.65V reset threshold (vs. 4.4V), identical pinout and feature set | Better suited for systems requiring higher reset hysteresis margin against 5V rail noise | Select MAX800LCPE+ when VCC tolerance exceeds ±3% or noise immunity is prioritized over low-threshold brownout response |
| TPS3823MPWPT | Single active-low RESET output, no RESET, no CE gating, 200ms fixed timeout, 3.08V threshold | Lacks battery switchover, watchdog, and chip-enable protection; intended for simpler reset-only use cases | Choose TPS3823MPWPT only if dual-reset, memory write protection, and backup power management are not required |
Compared with MAX800LCPE+, the MAX800MCPE+ offers earlier reset assertion for tighter brownout control; compared with TPS3823MPWPT, it delivers comprehensive system supervision including watchdog, CE gating, and dual-supply switchover - at the cost of higher design complexity and pin count.
Availability
MAX800MCPE+ is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic instruments, telecom RTUs, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX800MCPE+ 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 computing markets.
The MAX800M series belongs to Maxim's microprocessor supervisory product line, engineered specifically for robust 5V system monitoring with integrated battery switchover, watchdog, and memory protection in harsh environments.
FAQ
What is the reset threshold voltage of the MAX800MCPE+?
The MAX800MCPE+ has a typical reset threshold voltage of 4.40V, with a guaranteed range of 4.25V to 4.50V across temperature and supply conditions. This value is specific to the MAX800M variant and differs from the 4.65V threshold of the MAX800L family. The threshold is monitored continuously and triggers RESET assertion when VCC falls below this level.
Does the MAX800MCPE+ support battery backup operation?
Yes, the MAX800MCPE+ supports battery backup operation via the VBATT pin. When VCC falls below both the reset threshold and VBATT, the device switches VOUT from VCC to VBATT and asserts BATT ON high. In this mode, supply current drops to ≤1μA, and RESET remains valid - enabling continuous operation of critical circuitry from backup power.
How does the watchdog function work on the MAX800MCPE+?
The MAX800MCPE+ watchdog monitors the WDI pin for transitions. If WDI remains static (high or low) longer than the configured timeout (100ms or 1.6s), WDO and both RESET outputs are asserted for 200ms. Leaving WDI unconnected disables the watchdog via internal 1.6V bias. The timeout is selected using OSC SEL and OSC IN configurations per Table 1 in the datasheet.
What is the purpose of the CE IN and CE OUT pins on the MAX800MCPE+?
The CE IN and CE OUT pins implement chip-enable signal gating to prevent erroneous writes to CMOS RAM during power failure. When RESET is asserted, the CE path is disabled - blocking CE IN transitions from reaching CE OUT. This feature ensures memory integrity during brownout or reset sequences, with ≤10ns propagation delay in enabled mode.
Can the MAX800MCPE+ operate with VCC below 4.5V?
The MAX800MCPE+ is specified for VCC = 4.5V to 5.5V per datasheet Electrical Characteristics. While RESET remains valid down to VCC = 1V, functional operation (including CE gating, watchdog, and PFI comparison) requires VCC ≥ 4.5V. Operation below 4.5V may result in undefined behavior or parameter degradation outside guaranteed limits.
MAX800MCPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX800MCPE+ FAQ
1.How can I place an order for MAX800MCPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX800MCPE+ 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 MAX800MCPE+ reliable?
The price and inventory of MAX800MCPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX800MCPE+ is usually 5 days.
3.What payment methods are accepted for MAX800MCPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX800MCPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX800MCPE+?
MAX800MCPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX800MCPE+ 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 MAX800MCPE+?
For technical support, including MAX800MCPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX800MCPE+ requirements.
6.How does Aetrix verify that MAX800MCPE+ is sourced from the original manufacturer or authorized distributors?
All MAX800MCPE+ 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 MAX800MCPE+ meets industry standards.
7.What is the process for return or replacement of MAX800MCPE+?
All MAX800MCPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX800MCPE+, 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 MAX800MCPE+ part is unused and in its original packaging.
Return procedure for MAX800MCPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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