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Analog Devices Inc./Maxim Integrated MAX800MCSE+
- Part No.:
- MAX800MCSE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX800MCSE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,840
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Product details
Overview
The MAX800MCSE+ from Maxim Integrated is a microprocessor supervisory circuit designed for critical 5V power monitoring and system reset control in industrial 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 recovery in battery-backed systems.
For engineers reviewing the MAX800MCSE+ datasheet, MAX800MCSE+ pinout, MAX800MCSE+ application, or MAX800MCSE+ equivalent, this device delivers verified power-fail accuracy (±2%), chip-enable signal gating with ≤10ns propagation delay, and dual watchdog timeout modes - all in a 16-pin narrow SO package suitable for space-constrained embedded designs.
Technical Context
The MAX800MCSE+ integrates a precision voltage monitor, dual-reset outputs (active-low RESET and active-high RESET), a programmable watchdog timer with internal/external timing options, and bidirectional chip-enable gating logic. Its battery switchover comparator activates when VCC falls below VBATT − 0.3V, enabling seamless transition to backup power while asserting RESET.
It implements an open-drain RESET output with 0.1V saturation at 3.2mA sink current, a TTL-compatible WDO output, and a dedicated PFI/PFO comparator for independent power-fail or low-battery warning - all operating independently of the main reset function.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.40V typical (MAX800M variant); ensures reliable reset assertion during 5V rail brownout |
| Reset Timeout Period | 200ms typical on power-up; provides sufficient hold-off for μP initialization and clock stabilization |
| Supply Current (Operating) | 30μA typical; enables low-power operation in always-on monitoring applications |
| RESET Valid Down To | VCC = +1V; guarantees functional reset signaling even during deep undervoltage conditions |
| Power-Fail Accuracy | ±2% (guaranteed for MAX800M); supports precise low-battery or early power-loss detection |
| CE Propagation Delay | ≤10ns max; preserves timing integrity for high-speed memory access during fault conditions |
| Watchdog Timeout (Long) | 1.6s nominal; configurable via OSC SEL/OSC IN for flexible software activity monitoring |
Pinout & Package
MAX800MCSE+ is housed in a 16-pin narrow SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.3mm × 10.2mm, 1.27mm pitch). Pin 1 is marked by a dot or bevelled corner; pin numbering follows counterclockwise convention from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-backup input | Accepts 2.0V–5.5V backup source; enables switchover when VCC < VBATT − 0.3V |
| 2 VOUT | Output supply voltage | Switched output sourced from VCC or VBATT; powers downstream logic and internal circuitry |
| 3 VCC | Main 5V supply input | Regulated 4.5V–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 | Active-high open-drain output signaling VBATT is active; sinks 3.2mA at 0.1V |
| 6 LOW LINE | Reset comparator buffered output | Direct replica of reset comparator output; used for external status indication |
| 7 OSC IN | External oscillator timing input | Accepts capacitor or clock signal to configure watchdog/reset timeout periods |
| 8 OSC SEL | Oscillator mode select | Drives internal oscillator (floating/high) or enables external timing (low) |
| 9 PFI | Power-fail comparator input | Non-inverting input referenced to 1.25V; detects supply drop or low battery |
| 10 PFO | Power-fail comparator output | Open-drain output asserted low when PFI < 1.25V; independent of reset function |
| 11 WDI | Watchdog input | Three-level input (high/low/floating); resets watchdog timer on each valid edge or pulse ≥100ns |
| 12 CE OUT | Chip-enable gated output | Passes CE IN only when VCC > reset threshold; prevents memory corruption during faults |
| 13 CE IN | Chip-enable gated input | High-impedance during reset; series resistance ~75Ω in enabled state |
| 14 WDO | Watchdog output | Asserts low if WDI stalls >1.6s; returns high on next WDI transition |
| 15 RESET | Active-low reset output | Open-drain, sinks 3.2mA at 0.1V; asserted when VCC < 4.4V and held for 200ms after recovery |
| 16 RESET | Active-high reset output | Open-drain inverse of RESET; high-impedance when RESET is active |
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 |
| Guaranteed ±2% power-fail accuracy | Enables robust low-battery detection and predictive power-loss warning without calibration |
| Chip-enable gating with ≤10ns delay | Prevents spurious writes to CMOS RAM/EEPROM during brownout without compromising memory access speed |
| Backup switchover down to VCC = +1V | Maintains system supervision and reset validity even as main supply collapses to near-GND |
| Configurable watchdog timeout | Supports 100ms short or 1.6s long timeout via OSC SEL; eliminates need for external timing components |
| MaxCap®/SuperCap compatible | Enables direct integration with large-value backup capacitors (e.g., 0.47F) without external charge circuitry |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
|
Use Scenario: Continuous operation in factory-floor PLCs where unexpected power dips must not corrupt program memory or I/O state. IC Role / Device Role / Timing Role: Supervisory circuit providing brownout reset, CE gating, and battery-backed RAM retention during AC line interruption. Use Value: Prevents firmware corruption by disabling memory writes during undervoltage and asserting reset before μP executes invalid instructions. |
Use Scenario: Portable ultrasound or patient monitor requiring nonvolatile data retention and safe shutdown during battery depletion. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 5V rail for reset, and uses PFI/PFO to trigger low-battery alert before VBATT drops below safe operating level. Use Value: ±2% PFI accuracy ensures consistent low-battery warning across temperature, avoiding premature shutdown or unsafe operation. |
| Smart Energy Meter | Rack-Mounted Network Appliance |
|
Use Scenario: Utility-grade meter storing tariff data and consumption logs in EEPROM, powered from mains with supercapacitor backup. IC Role / Device Role / Timing Role: Manages switchover from mains to supercapacitor, asserts RESET to halt μP, and gates CE to protect EEPROM write cycles. Use Value: 30μA operating current extends supercapacitor hold-up time; VCC-to-VOUT on-resistance <1.6Ω minimizes voltage drop during backup. |
Use Scenario: Carrier-grade switch/router requiring fail-safe boot sequence and watchdog recovery after firmware update failure. IC Role / Device Role / Timing Role: Provides 200ms power-on reset hold-off, 1.6s watchdog timeout, and WDO-driven recovery interrupt to bootloader. Use Value: WDO output directly interfaces with μP NMI pin, enabling autonomous recovery without host software involvement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX800LCSE+ | 4.65V reset threshold (vs. 4.4V); same pinout, package, and feature set | Better suited for systems with tighter 5V rail tolerance where earlier reset assertion is required | Select MAX800LCSE+ when VCC brownout occurs above 4.4V and system requires earlier reset initiation |
| TPS3808G33DBVR | Fixed 3.3V supply monitoring; no battery switchover, CE gating, or dual reset outputs | Limited to single-rail 3.3V systems; lacks backup power management and memory protection features | Choose TPS3808G33DBVR only for cost-sensitive 3.3V-only applications without battery backup or CE control needs |
Compared with MAX800LCSE+, the MAX800MCSE+ triggers reset later (4.4V vs. 4.65V), extending operational margin before shutdown; versus TPS3808G33DBVR, it provides full 5V supervision with integrated battery switchover, CE gating, and dual reset outputs - making it uniquely suited for robust, multi-rail industrial systems.
Availability
MAX800MCSE+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, smart energy meters, and rack-mounted network appliances requiring stable component supply and long-term lifecycle support.
Supply support for MAX800MCSE+ 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 mission-critical 5V systems needing guaranteed reset behavior, battery backup, and memory protection under brownout and power-fail conditions.
FAQ
What is the reset threshold voltage for MAX800MCSE+?
The MAX800MCSE+ has a typical reset threshold voltage of 4.40V, with guaranteed limits of 4.25V (min) and 4.50V (max) over temperature and supply variations. This value is specific to the MAX800M variant and differs from the 4.65V threshold of the MAX800L family. The MAX800MCSE+ maintains this specification across its full operating temperature range of -40°C to +85°C.
Does MAX800MCSE+ support battery backup operation?
Yes, the MAX800MCSE+ fully supports battery backup operation. It automatically switches VOUT from VCC to VBATT when VCC falls below VBATT − 0.3V and remains below the 4.4V reset threshold. In this mode, RESET remains asserted, BATT ON goes high, and VOUT is sourced from VBATT - enabling continuous supervision and memory retention. The device guarantees RESET validity down to VCC = +1V, and supports MaxCap®/SuperCap compatibility.
How does the chip-enable gating function work on MAX800MCSE+?
The MAX800MCSE+ implements hardware-enforced CE gating: CE OUT passes CE IN signals only when VCC is above the 4.4V reset threshold and no reset condition is active. During power-down or watchdog fault, CE OUT is disabled within 15µs, preventing spurious writes to CMOS RAM or EEPROM. The path uses a 75Ω series transmission gate with ≤10ns propagation delay (tested at 50Ω drive, 50pF load), preserving high-speed memory interface integrity.
Can MAX800MCSE+ be used with a 3.3V microprocessor?
No, the MAX800MCSE+ is designed exclusively for 5V systems: its VCC operating range is 4.5V to 5.5V, reset threshold is fixed at 4.4V, and all outputs (RESET, WDO, PFO, etc.) are referenced to VOUT/VCC. Using it with a 3.3V μP would violate absolute maximum ratings and invalidate timing and voltage specifications. For 3.3V supervision, consider purpose-built devices like the TPS3808 series.
What is the watchdog timeout behavior of MAX800MCSE+?
The MAX800MCSE+ offers two watchdog timeout modes: a nominal 1.6s long period and a 100ms short period immediately after reset - both selectable via OSC SEL pin configuration. The watchdog monitors WDI for transitions; if none occur for the selected timeout duration, WDO and RESET are asserted for 200ms. Leaving WDI unconnected disables the watchdog, as an internal divider biases it to ~1.6V.
MAX800MCSE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX800MCSE+ FAQ
1.How can I place an order for MAX800MCSE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX800MCSE+ 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 MAX800MCSE+ reliable?
The price and inventory of MAX800MCSE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX800MCSE+ is usually 5 days.
3.What payment methods are accepted for MAX800MCSE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX800MCSE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX800MCSE+?
MAX800MCSE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX800MCSE+ 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 MAX800MCSE+?
For technical support, including MAX800MCSE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX800MCSE+ requirements.
6.How does Aetrix verify that MAX800MCSE+ is sourced from the original manufacturer or authorized distributors?
All MAX800MCSE+ 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 MAX800MCSE+ meets industry standards.
7.What is the process for return or replacement of MAX800MCSE+?
All MAX800MCSE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX800MCSE+, 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 MAX800MCSE+ part is unused and in its original packaging.
Return procedure for MAX800MCSE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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