MAX705：Low-Cost, µP Supervisory Circuits _ BDTIC a Leading Distributor in China

MAX705：Low-Cost, µP Supervisory Circuits

Low-Cost Reset + Watchdog ICs

The MAX705–MAX708/MAX813L microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX705/MAX706/MAX813L provide four functions: A reset output during power-up, power-down, and brownout conditions. An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds. A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V. An active-low manual-reset input. The MAX707/MAX708 are the same as the MAX705/MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the MAX705, except RESET is provided instead of active-low RESET. Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO and µMAX® packages.

Key Features

Supervisory-Function Integration Significantly Improves System Reliability While Reducing Board Space
- µMAX Package
- Guaranteed Active Low RESET Valid at VCC = 1V
  - 200ms Reset Pulse Width
  - Debounced TTL/CMOS-Compatible Manual-Reset Input
  - Active-High Reset Output (MAX707/MAX708/MAX813L)
- Precision-Supply Voltage Monitor
  - 4.65V (MAX705/MAX707/MAX813L)
  - 4.40V (MAX706/MAX708)
- Voltage Monitor for Power-Fail or Low-Battery Warning

MAX705, MAX706, MAX707, MAX708, MAX813, MAX813L: Typical Operating Circuit

Applications/Uses

Computers
Controllers
Critical µP Power Monitoring
Intelligent Instruments

DataSheet

title	Download file
MAX705-MAX813L Data Sheet	MAX705-MAX813L.pdf

Parametrics

Part Number	Reset Thresh. (V)	Reset Out	t_RESET	Watchdog Feature	Watchdog Timeout	Supervisor Features	Reset Thresh. Accur. (%)	I_CC (µA)	Package/Pins	Budgetary Price
Part Number	Reset Thresh. (V)	Reset Out	min	Watchdog Feature	Watchdog Timeout	Supervisor Features	@ +25°C	max	Package/Pins	See Notes
MAX705	3.3 to 5.5	Active Low Push-Pull	85ms to 300ms	Input (WDI) Input/Output (WDI/WDO)	1s to 2s	Adjustable Reset Input Manual Reset Power Fail Comparator/Low Battery Detect	2.5	350	µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8	$2.78 @1k
MAX706		Active Low Push-Pull		Input (WDI) Input/Output (WDI/WDO)	1s to 2s				µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8	$1.82 @1k
MAX707		Active High Active Low Push-Pull		No Watchdog	-				µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8	$2.01 @1k
MAX708		Active High Active Low Push-Pull		No Watchdog	-				µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8	$1.82 @1k

Quality and Environmental Data

MAX705.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX705C/D	Active		DICE SALES,;NA pin;DICE S;	0°C to +70°C	See data sheet
MAX705CPA	No Longer Available	MAX705CPA+	PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	No
MAX705CPA+	Active		PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	Lead Free
MAX705CSA	No Longer Available	MAX705CSA+	SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX705CSA+	Active		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	Lead Free
MAX705CSA+T	Active		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	Lead Free
MAX705CSA-G05	Active		N.SO;	0°C to +70°C	See data sheet
MAX705CSA-G077	Active		N.SO;	0°C to +70°C	See data sheet
MAX705CSA-T	No Longer Available	MAX705CSA+T	SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX705CSA-TG05	No Longer Available		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX705CSA-TG077	No Longer Available		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX705CUA	No Longer Available	MAX705CUA+	µMAX,;8 pin;15.6 mm²	0°C to +70°C	No
MAX705CUA+	Active		µMAX,;8 pin;15.6 mm²	0°C to +70°C	Lead Free
MAX705CUA+T	Active		µMAX,;8 pin;15.6 mm²	0°C to +70°C	Lead Free
MAX705CUA-G05	Active		uMAX;	0°C to +70°C	See data sheet
MAX705CUA-T	No Longer Available	MAX705CUA+T	µMAX,;8 pin;15.6 mm²	0°C to +70°C	No
MAX705CUA-TG05	No Longer Available		µMAX,;8 pin;15.6 mm²	0°C to +70°C	No
MAX705EPA	No Longer Available	MAX705EPA+	PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	No
MAX705EPA+	Active		PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	Lead Free
MAX705ESA	No Longer Available	MAX705ESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX705ESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX705ESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX705ESA-T	No Longer Available	MAX705ESA+T	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX705ESA/GH9	No Longer Available	MAX705ESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX705ESA/GH9-T	No Longer Available	MAX705ESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX705EUA	No Longer Available	MAX705EUA+	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX705EUA+	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX705EUA+T	Active		µMAX,;8 pin;15.6 mm²	-40°C to +85°C	Lead Free
MAX705EUA-T	No Longer Available	MAX705EUA+T	µMAX,;8 pin;15.6 mm²	-40°C to +85°C	No
MAX705MJA	Active		CDIP(N),;8 pin;82.6 mm²	-55°C to +125°C	No
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX705MJA/883B	Active		CDIP(N),;8 pin;82.6 mm²	-55°C to +125°C	No