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Analog Devices Inc./Maxim Integrated MAX800LCPE
- Part No.:
- MAX800LCPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX800LCPE.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
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Product details
Overview
The MAX800LCPE from Maxim Integrated is a microprocessor supervisory circuit designed for critical 5V power monitoring and battery-backed system integrity. It features a 4.65V typical reset threshold, 200ms power-up reset timeout, guaranteed RESET assertion down to VCC = 1V, ±2% power-fail accuracy, and integrated chip-enable gating with ≤10ns propagation delay. It is used in industrial controllers and intelligent instruments requiring reliable brownout protection and nonvolatile memory write protection.
For engineers reviewing the MAX800LCPE datasheet, MAX800LCPE pinout, MAX800LCPE application, or MAX800LCPE equivalent, key selection criteria include its dual-reset outputs (active-low RESET and active-high RESET), battery switchover capability with BATT ON status indication, watchdog timer with selectable timeout modes, and CE signal gating for CMOS RAM/EEPROM write protection during power failure.
Technical Context
The MAX800LCPE implements a dual-comparator architecture: one for precise VCC monitoring (4.65V threshold, 15mV hysteresis) and another uncommitted power-fail comparator (PFI/PFO) with 1.25V threshold and ±25nA leakage. Its internal oscillator supports fixed 200ms reset timeout and 1.6s/100ms watchdog periods, configurable via OSC SEL and OSC IN pins.
It integrates bidirectional power-path control: a low-RDS(ON) PMOS switch (≤1.2Ω) routes VCC to VOUT during normal operation, while a separate VBATT-to-VOUT path (≤30Ω) engages when VCC falls below VBATT − 0.3V and the reset threshold. CE IN/CE OUT transmission gating operates with 75–150Ω on-resistance and ≤10ns delay under 50pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.65V typical; ensures deterministic μP reset initiation at stable 5V rail level |
| Power-Up Reset Timeout | 200ms typical; provides sufficient hold-off for power supply stabilization before release | Supply Current (Operating) | 30μA typical; enables low-power system monitoring without burdening main supply |
| Power-Fail Accuracy | ±2% guaranteed; supports precise low-battery or early power-loss warning |
| CE Propagation Delay | ≤10ns max; preserves timing integrity for high-speed μP CE signal routing |
| VCC-to-VOUT On-Resistance | 0.8–1.2Ω (MAX800_C/E); limits voltage drop to ≤200mV at 250mA load |
| RESET Validity Range | Down to VCC = 1V; maintains reset assertion through deep brownout conditions |
Pinout & Package
MAX800LCPE is supplied in a 16-pin plastic DIP package with 0.3-inch body width and standard through-hole footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-backup input | Connects to backup capacitor or battery; enables seamless switchover when VCC fails |
| 2 VOUT | Output supply voltage | Primary system supply rail output; sourced from VCC or VBATT depending on switchover state |
| 3 VCC | Main 5V supply input | Regulated 4.75–5.5V input; monitored for reset generation and CE gating enable |
| 4 GND | Ground reference | 0V return for all analog and digital functions; decoupling capacitor required at VOUT |
| 5 BATT ON | Battery-on status indicator | Open-drain output high when VBATT powers VOUT; drives external PNP base for >250mA loads |
| 6 LOW LINE | Reset comparator buffered output | Active-low signal indicating VCC < reset threshold; sinks 3.2mA at 0.1V saturation |
| 7 OSC IN | Oscillator timing input | Accepts external capacitor or clock; sets watchdog/reset timeout periods when OSC SEL = GND |
| 8 OSC SEL | Oscillator mode select | High or floating → internal oscillator; low → external timing control via OSC IN |
| 9 PFI | Power-fail comparator input | Noninverting input referenced to 1.25V; detects supply sag or battery depletion |
| 10 PFO | Power-fail comparator output | Active-low open-drain output; asserts when PFI < 1.25V; independent of reset logic |
| 11 WDI | Watchdog input | Three-level input (high/low/floating); resets watchdog timer on edge or ≥100ns pulse |
| 12 CE OUT | Chip-enable gated output | Passes CE IN only when VCC > reset threshold; disables during reset to protect RAM |
| 13 CE IN | Chip-enable gated input | High-impedance during reset; series 75Ω resistance when enabled |
| 14 WDO | Watchdog output | Active-low open-drain; asserts with WDI timeout and holds until next WDI transition |
| 15 RESET | Active-low reset output | Open-drain; sinks 3.2mA at 0.1V; guaranteed valid down to VCC = 1V |
| 16 RESET | Active-high reset output | Open-drain inverse of RESET; high-impedance when RESET is asserted |
Key Features
| Feature | Design Value |
|---|---|
| Dual reset outputs | Simultaneous active-low RESET and active-high RESET support both μP reset polarity requirements without external inverters |
| Battery switchover with ±2% accuracy | Enables reliable data retention in RAM/EEPROM during AC loss using MaxCap® or supercapacitors |
| Integrated CE signal gating | Prevents spurious writes to nonvolatile memory during power transients by disabling CE path during reset assertion |
| Watchdog with selectable timeout | Configurable 100ms/1.6s watchdog periods via OSC SEL/OSC IN simplify firmware watchdog management |
| Uncommitted PFI/PFO comparator | Provides flexible low-battery detection or early power-fail warning independent of system reset behavior |
Applications
| Industrial Controller Power Monitoring | Intelligent Instrument Data Retention |
|---|---|
Use Scenario: PLC or motion controller operating in factory environments with fluctuating 5V supplies and risk of brownout-induced firmware corruption. IC Role / Device Role / Timing Role: Supervisory circuit providing VCC monitoring, reset generation, and CE gating to prevent RAM write errors during voltage sags. Use Value: Guarantees μP starts in known state after power recovery and blocks invalid memory writes during 200ms reset hold time. | Use Scenario: Portable test equipment with EEPROM-based calibration storage and supercapacitor backup for safe shutdown. IC Role / Device Role / Timing Role: Battery switchover controller and watchdog supervisor ensuring uninterrupted power to memory during AC loss. Use Value: Maintains VOUT from VBATT down to 2.0V with ≤30Ω on-resistance, enabling >10s of safe shutdown time. |
| Critical μP Power Monitoring | Computer System Health Management |
Use Scenario: Embedded medical device requiring fail-safe boot sequence and deterministic reset behavior under all supply conditions. IC Role / Device Role / Timing Role: Primary reset generator with 4.65V threshold and validity down to VCC = 1V, plus watchdog supervision of safety-critical firmware. Use Value: Eliminates need for external reset IC or pull-up resistors; RESET remains functional even during severe brownout. | Use Scenario: Industrial PC motherboard monitoring 5V rail health and triggering graceful OS shutdown on impending power loss. IC Role / Device Role / Timing Role: Dual-function monitor: PFI/PFO comparator generates early warning, while RESET enforces controlled reboot if voltage collapses. Use Value: ±2% PFI accuracy allows precise margining against 5V tolerance; 25μs PFI-to-PFO delay enables timely response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691ACPE | Same 4.65V reset threshold and 200ms timeout, but lacks ±2% power-fail accuracy and battery switchover hysteresis spec | Not suitable for precision low-battery detection or systems requiring guaranteed PFI accuracy | Select MAX800LCPE when ±2% PFI tolerance and robust battery switchover are required |
| TPS3823MPDBVR | 3.08V fixed reset threshold, no battery switchover, no CE gating, no PFI/PFO comparator | Only fits basic reset-only applications; cannot replace MAX800LCPE's full supervisory feature set | Choose only if system requires simple reset generation without backup, watchdog, or power-fail functions |
Compared with MAX691ACPE and TPS3823MPDBVR, the MAX800LCPE uniquely combines precision power-fail monitoring (±2%), battery switchover with status indication (BATT ON), and hardware-enforced CE gating-making it the sole option for systems demanding coordinated memory protection, backup power management, and early fault warning in a single 16-pin DIP.
Availability
MAX800LCPE is available at Aetrix Electronics and suitable for industrial controllers, intelligent instruments, critical μP power monitoring, and computer system health management requiring stable component supply across extended temperature ranges.
Supply support for MAX800LCPE 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 industrial, automotive, and computing applications, with emphasis on reliability and integration.
The MAX800L family targets microprocessor supervisory functions in harsh environments, delivering combined reset, watchdog, battery switchover, and power-fail monitoring in a single IC to reduce board space and improve system robustness.
FAQ
What is the guaranteed reset threshold voltage for MAX800LCPE?
The MAX800LCPE has a guaranteed reset threshold voltage of 4.50V minimum, 4.65V typical, and 4.75V maximum at TA = +25°C. This specification applies across the full operating temperature range (0°C to +70°C), and the device includes 15mV hysteresis to prevent chatter near the threshold. The MAX800LCPE's 4.65V nominal threshold is specifically optimized for 5V systems where reliable detection of VCC droop below 4.75V is critical.
Does MAX800LCPE support battery backup with supercapacitors?
Yes, the MAX800LCPE explicitly supports MaxCap® and supercapacitor-based backup solutions. Its VBATT input accepts voltages from 2.0V to 5.5V, and its battery switchover comparator activates when VCC falls below VBATT − 0.3V. In battery-backup mode, VOUT is sourced from VBATT through a ≤30Ω on-resistance path, enabling sustained operation of downstream circuitry. The BATT ON output provides status indication and can drive an external PNP transistor for higher current demands beyond the 25mA VBATT continuous rating.
How does the CE gating function work in MAX800LCPE?
The MAX800LCPE's CE gating uses an internal transmission gate between CE IN (pin 13) and CE OUT (pin 12). When VCC is above the reset threshold, the gate is enabled and passes CE signals with ≤10ns propagation delay and 75–150Ω on-resistance. During reset assertion (VCC < 4.65V), the gate disables and CE OUT is actively pulled high to VOUT, preventing spurious writes to CMOS RAM or EEPROM. This hardware-enforced isolation eliminates software dependency and ensures memory integrity during power failure or brownout events.
Can MAX800LCPE generate accurate power-fail warnings?
Yes, the MAX800LCPE guarantees power-fail accuracy to ±2% for the MAX800L variant, as confirmed in its Electrical Characteristics table. Its PFI input has a 1.25V typical threshold with ±25nA leakage, and the PFO output asserts low within 25μs of PFI crossing the threshold during power failure. This precision enables reliable low-battery detection in portable instruments and early warning of AC supply collapse in industrial systems-without requiring external calibration or trimming components.
What watchdog timeout options are available on MAX800LCPE?
The MAX800LCPE offers three watchdog timeout configurations: default 1.6s long period and 100ms short period (when OSC SEL = VOUT and OSC IN = GND), or user-defined periods via external capacitor on OSC IN (e.g., 47pF yields ~1.6s). The watchdog timer resets on any WDI transition (≥100ns pulse) and asserts WDO, RESET, and RESET for the configured reset timeout (200ms typical). Watchdog functionality is disabled when WDI is left floating, as an internal divider biases it to ~1.6V.
MAX800LCPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- 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
MAX800LCPE FAQ
1.How can I place an order for MAX800LCPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX800LCPE 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 MAX800LCPE reliable?
The price and inventory of MAX800LCPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX800LCPE is usually 5 days.
3.What payment methods are accepted for MAX800LCPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX800LCPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX800LCPE?
MAX800LCPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX800LCPE 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 MAX800LCPE?
For technical support, including MAX800LCPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX800LCPE requirements.
6.How does Aetrix verify that MAX800LCPE is sourced from the original manufacturer or authorized distributors?
All MAX800LCPE 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 MAX800LCPE meets industry standards.
7.What is the process for return or replacement of MAX800LCPE?
All MAX800LCPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX800LCPE, 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 MAX800LCPE part is unused and in its original packaging.
Return procedure for MAX800LCPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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