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Analog Devices Inc./Maxim Integrated MAX800MCSE+T
- Part No.:
- MAX800MCSE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX800MCSE+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,556
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Product details
Overview
MAX800MCSE+T from Maxim Integrated is a microprocessor supervisory circuit with 4.4V typical reset threshold, 200ms power-up reset timeout, 30μA operating supply current, and integrated chip-enable gating with ≤10ns propagation delay. It monitors 5V systems for brownout and power-fail conditions while providing battery switchover support and watchdog functionality in industrial controllers and intelligent instruments.
For engineers reviewing the MAX800MCSE+T datasheet, MAX800MCSE+T pinout, MAX800MCSE+T application, or MAX800MCSE+T equivalent, this page delivers verified specifications, validated pin functions, confirmed backup-battery operation down to VCC = 1V, and real-world timing behavior across temperature for reliable μP reset supervision and CE signal protection.
Technical Context
The MAX800MCSE+T implements dual-reset outputs (active-low RESET and active-high RESET) with guaranteed assertion down to VCC = 1V, using an internal voltage comparator with 15mV hysteresis and 4.40V nominal trip point. Its watchdog timer supports both internal oscillator (1.6s nominal timeout) and external capacitor- or clock-controlled configurations via OSC SEL/OSC IN pins.
Chip-enable gating uses a 75Ω series transmission gate between CE IN and CE OUT, enabling sub-10ns propagation delay while blocking erroneous writes during reset assertion. Battery switchover occurs when VCC falls below VBATT − 0.3V, with BATT ON output signaling mode transition and VOUT sourcing from VBATT with ≤30Ω on-resistance at 2.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.40V typical; ensures reliable reset assertion during 5V system brownout down to 4.25V min. |
| Reset Timeout Period | 200ms typical on power-up; provides sufficient μP initialization time before release. |
| Supply Current (Operating) | 30μA typical; enables low-power monitoring without burdening 5V rail. |
| CE IN-to-CE OUT Delay | ≤10ns max; preserves high-speed memory access timing in fast μP systems. |
| Power-Fail Accuracy | ±2% guaranteed; supports precise early-warning detection for critical power monitoring. |
| VCC-to-VOUT On-Resistance | 0.8–1.6Ω; maintains <200mV drop at 250mA load for stable system supply rail. |
| VBATT-to-VOUT On-Resistance | 15–30Ω; enables reliable backup operation with MaxCap® or supercapacitor sources. |
Pinout & Package
MAX800MCSE+T is housed in a 16-pin narrow SOIC package (SO-16N), 3.9mm × 9.9mm body, 1.27mm pitch, RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-backup input | Connects to backup source (e.g., supercap); enables VOUT sourcing when VCC drops below reset threshold. |
| 2 VOUT | Output supply voltage | Primary system supply rail; sourced from VCC or VBATT depending on switchover state. |
| 3 VCC | Main 5V supply input | Regulated +5V input; monitored for reset assertion and CE gating control. |
| 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 pulled high in battery mode; drives PNP base for >250mA external pass transistors. |
| 6 LOW LINE | Reset comparator buffered output | Active-low signal indicating VCC < reset threshold; sinks 3.2mA at 0.1V saturation. |
| 7 OSC IN | External oscillator timing input | Accepts capacitor or clock signal to configure watchdog/reset timeout periods (e.g., 100ms or 1.6s). |
| 8 OSC SEL | Oscillator select control | Low = external timing enabled; floating/high = internal oscillator active (default 200ms/1.6s). |
| 9 PFI | Power-fail comparator input | Non-inverting input referenced to 1.25V; detects supply sag or low-battery condition. |
| 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); reset triggered if no transition occurs within timeout period. |
| 12 CE OUT | Chip-enable gated output | Passes CE IN only when VCC > reset threshold; blocks writes during power failure. |
| 13 CE IN | Chip-enable gated input | High-impedance during reset; enables CE signal path only in valid power state. |
| 14 WDO | Watchdog output | Active-low open-drain output; mirrors RESET assertion during watchdog timeout. |
| 15 RESET | Active-low reset output | Open-drain output; sinks 3.2mA at 0.1V; valid down to VCC = 1V; requires pull-up. |
| 16 RESET | Active-high reset output | Open-drain output; inverse of RESET; high-impedance when inactive; valid in battery mode. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = +1V | Ensures deterministic μP reset even during deep brownout, eliminating code-execution errors. |
| On-board CE signal gating with ≤10ns delay | Prevents spurious memory writes during power transitions without adding external logic or timing overhead. |
| ±2% power-fail accuracy (MAX800M variant) | Enables precise low-battery warning and early power-loss detection in mission-critical instrumentation. |
| MaxCap®/supercap-compatible battery switchover | Supports seamless backup using low-ESR capacitors instead of batteries, reducing maintenance and size. |
| Dual-reset outputs (RESET/RESET) | Provides native compatibility with both active-high and active-low μP reset inputs in same footprint. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Continuous operation in factory-floor PLCs where 5V supply may experience transient sags or interruptions. IC Role / Device Role / Timing Role: Supervises VCC, asserts RESET for 200ms on brownout, gates CE to prevent RAM corruption, and signals battery switchover via BATT ON. Use Value: Eliminates firmware lockups and data loss during line disturbances without requiring external supervisors or discrete logic. |
Use Scenario: Portable diagnostic equipment with supercapacitor backup for safe shutdown during AC power loss. IC Role / Device Role / Timing Role: Monitors main 5V rail, triggers controlled shutdown sequence via WDO, switches VOUT to VBATT, and asserts PFO for low-energy alert. Use Value: Guarantees ≥200ms of functional runtime after AC loss, preserving patient data and enabling graceful state save. |
| Telecom Base Station Management | Smart Energy Meter |
Use Scenario: Remote telecom node powered by PoE with local supercap backup for firmware update integrity. IC Role / Device Role / Timing Role: Uses WDI to monitor host processor activity; asserts RESET if firmware hangs during OTA update; gates CE to protect flash memory. Use Value: Prevents bricking during field updates by enforcing watchdog-triggered recovery with hardware-enforced write protection. |
Use Scenario: Revenue-grade meter requiring tamper-proof power monitoring and secure nonvolatile memory retention. IC Role / Device Role / Timing Role: Applies ±2% accurate PFI threshold to detect grid voltage collapse; holds RESET until stable 5V returns; backs up RTC via VOUT/VBATT. Use Value: Meets IEC 62053-21 accuracy requirements for power-fail detection while maintaining timekeeping during outages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX803SCSA+ | Simpler 3-pin supervisor; no CE gating, no watchdog, no battery switchover; 4.63V reset threshold. | Only suitable for basic reset-only use cases without memory protection or backup power management. | Select when cost and board space are primary constraints and advanced features are unnecessary. |
| TPS3808G33DBVR | TI part with 3.3V reset threshold, 200ms timeout, but no CE gating, no battery switchover, no dual RESET outputs. | Designed for 3.3V systems; lacks VBATT interface and VOUT switching capability required for backup operation. | Choose only for 3.3V μP supervision where battery backup and CE protection are not needed. |
Compared with MAX800MCSE+T, MAX803SCSA+ omits CE gating and battery management-making it unsuitable for systems requiring write protection or switchover-while TPS3808G33DBVR targets 3.3V rails and cannot replace MAX800MCSE+T in 5V backup-supervised designs.
Availability
MAX800MCSE+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom base station management units, and smart energy meters requiring stable component supply with long-term lifecycle support.
Supply support for MAX800MCSE+T 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 applications.
The MAX800M family is designed specifically for robust 5V microprocessor supervision with integrated battery switchover, watchdog, and chip-enable protection-targeting applications where data integrity and fail-safe operation are critical.
FAQ
What is the reset threshold voltage for MAX800MCSE+T?
The MAX800MCSE+T has a typical reset threshold voltage of 4.40V, with a guaranteed range of 4.25V to 4.50V over temperature and supply variation. This value is specific to the MAX800M variant (and MAX693A), distinguishing it from the 4.65V threshold of the MAX800L/MAX691A series. The threshold applies to both RESET and RESET outputs and remains stable across the full −40°C to +85°C operating range.
Does MAX800MCSE+T support battery backup operation?
Yes, MAX800MCSE+T fully supports battery backup operation: when VCC falls below the reset threshold and below VBATT − 0.3V, it automatically switches VOUT sourcing from VCC to VBATT. In this mode, VOUT remains valid, RESET stays asserted, and BATT ON goes high-enabling continuous operation of critical circuitry such as RTC or SRAM. The device guarantees VOUT operation down to VBATT = 2.0V with ≤30Ω on-resistance.
How does the chip-enable gating function work in MAX800MCSE+T?
The MAX800MCSE+T implements hardware-enforced CE gating using a 75Ω transmission gate between CE IN and CE OUT. When VCC is above the reset threshold, CE IN passes directly to CE OUT with ≤10ns propagation delay. During reset assertion (VCC < 4.25V), the gate disables and CE OUT is actively pulled to VOUT-preventing spurious memory writes. This function requires no software intervention and operates independently of watchdog or power-fail states.
Can MAX800MCSE+T be used with supercapacitors instead of batteries?
Yes, MAX800MCSE+T is explicitly MaxCap®- and supercapacitor-compatible. Its VBATT input supports low-impedance backup sources with ≤30Ω on-resistance at 2.0V, and its 1μA typical battery-standby current minimizes self-discharge. The device's switchover hysteresis (60mV) and guaranteed operation down to VBATT = 2.0V make it ideal for compact, maintenance-free backup solutions using 0.47F or similar supercaps.
What is the watchdog timeout behavior of MAX800MCSE+T?
The MAX800MCSE+T offers configurable watchdog timeout: default is 1.6s nominal (long period) with 100ms short period immediately after reset, selectable via OSC SEL/OSC IN. A transition at WDI resets the timer; absence beyond timeout asserts WDO low and triggers RESET for 200ms. If WDI is left unconnected, the internal 100kΩ divider biases it to ~1.6V, disabling the watchdog-ensuring fail-safe behavior without external pull-ups.
MAX800MCSE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX800MCSE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX800MCSE+T 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+T reliable?
The price and inventory of MAX800MCSE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX800MCSE+T is usually 5 days.
3.What payment methods are accepted for MAX800MCSE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX800MCSE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX800MCSE+T?
MAX800MCSE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX800MCSE+T 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+T?
For technical support, including MAX800MCSE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX800MCSE+T requirements.
6.How does Aetrix verify that MAX800MCSE+T is sourced from the original manufacturer or authorized distributors?
All MAX800MCSE+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX800MCSE+T?
All MAX800MCSE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX800MCSE+T, 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+T part is unused and in its original packaging.
Return procedure for MAX800MCSE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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