Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package | Tube |
| ProductStatus | Obsolete |
| Type | Simple Reset/Power-On Reset |
| NumberofVoltagesMonitored | 1 |
| Voltage-Threshold | 4.65V |
| Output | Push-Pull, Totem Pole |
| Reset | Active High |
| ResetTimeout | 140ms Minimum |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Tổng quan
Description
MAX813LESA is a microprocessor supervisory device with a watchdog timer from Maxim Integrated (now Analog Devices). It protects a MCU by monitoring Vcc and issuing a reset if the supply is out of range or if the watchdog isn’t serviced.
Key points:
- Combines a voltage detector with a watchdog timer.
- External capacitor sets the reset timing window; WDI input must be toggled periodically to keep reset deasserted.
- Output delivers a reset signal to the microcontroller (drive type described in the datasheet).
- Operates from a typical 2.7–5.5 V supply; low power for embedded apps.
- 8-pin package; LE suffix indicates a lead-free, RoHS-compliant variant.
Usage idea:
- Connect Vcc and Gnd to the MCU supply, RST to the MCU reset pin, WDI to your watchdog source, and a capacitor to set the desired reset timeout.
For exact voltage thresholds, timing values, and package details, consult the MAX813LESA datasheet.
Key points:
- Combines a voltage detector with a watchdog timer.
- External capacitor sets the reset timing window; WDI input must be toggled periodically to keep reset deasserted.
- Output delivers a reset signal to the microcontroller (drive type described in the datasheet).
- Operates from a typical 2.7–5.5 V supply; low power for embedded apps.
- 8-pin package; LE suffix indicates a lead-free, RoHS-compliant variant.
Usage idea:
- Connect Vcc and Gnd to the MCU supply, RST to the MCU reset pin, WDI to your watchdog source, and a capacitor to set the desired reset timeout.
For exact voltage thresholds, timing values, and package details, consult the MAX813LESA datasheet.
Equivalent
MAX813LESA is a Maxim voltage‑supervisor/reset IC. Equivalents (same function) from other vendors include:
- TI TLV803/TLV803B
- Microchip MCP1316/MCP1315
- On Semiconductor NCP301/NCP302
- Analog Devices ADM803/ADM803A
Note: exact cross depends on reset threshold, delay, and package. Provide the required trip voltage and delay for precise matching.
- TI TLV803/TLV803B
- Microchip MCP1316/MCP1315
- On Semiconductor NCP301/NCP302
- Analog Devices ADM803/ADM803A
Note: exact cross depends on reset threshold, delay, and package. Provide the required trip voltage and delay for precise matching.
Features
MAX813LESA features (typical of the MAX813 family):
- 8-pin lead-free package (LESA)
- Microprocessor supervisory circuit with power-on reset (POR)
- Undervoltage/brown-out detection with reset output
- Manual reset input
- Watchdog timer with programmable timeout (timing set by external component)
- Reset output (active-low) suitable for MCU reset
- Very low quiescent current in normal operation
- Wide supply range with industrial/high-temp variants available
Note: Exact reset thresholds, watchdog timing ranges, and temperature range depend on the specific MAX813LESA variant. Check the datasheet for the precise values.
- 8-pin lead-free package (LESA)
- Microprocessor supervisory circuit with power-on reset (POR)
- Undervoltage/brown-out detection with reset output
- Manual reset input
- Watchdog timer with programmable timeout (timing set by external component)
- Reset output (active-low) suitable for MCU reset
- Very low quiescent current in normal operation
- Wide supply range with industrial/high-temp variants available
Note: Exact reset thresholds, watchdog timing ranges, and temperature range depend on the specific MAX813LESA variant. Check the datasheet for the precise values.
Pinout
- Pin count: 8 pins (8-pin SOIC/SC-70 package)
- Function: Microprocessor voltage supervisor/reset generator. It monitors the supply (Vcc) and asserts an active-low reset output to the MCU when the voltage falls out of range (power-up/down protection).
- Function: Microprocessor voltage supervisor/reset generator. It monitors the supply (Vcc) and asserts an active-low reset output to the MCU when the voltage falls out of range (power-up/down protection).
Manufacturer
- Manufacturer: Maxim Integrated Products (the MAX813LESA). Maxim Integrated is now part of Analog Devices.
- What kind of company: A fabless semiconductor company that designs and markets analog and mixed-signal integrated circuits.
- What kind of company: A fabless semiconductor company that designs and markets analog and mixed-signal integrated circuits.
Application
MAX813LESA is a voltage-monitor/reset IC. Typical application areas include:
- Microprocessor/microcontroller reset generation (POR/BOR)
- Power-fail and brownout protection for digital systems
- System supervision in embedded controllers and SoCs
- Battery-powered/portable devices requiring undervoltage detection
- Reset conditioning for FPGAs/PLDs, DSPs, and other ICs
- Consumer electronics, automotive, and industrial control equipment
- Any system needing a clean reset during power-up/power-down events
- Microprocessor/microcontroller reset generation (POR/BOR)
- Power-fail and brownout protection for digital systems
- System supervision in embedded controllers and SoCs
- Battery-powered/portable devices requiring undervoltage detection
- Reset conditioning for FPGAs/PLDs, DSPs, and other ICs
- Consumer electronics, automotive, and industrial control equipment
- Any system needing a clean reset during power-up/power-down events
Package
8-pin SOIC (SOP-8) package.
