MAX690A：Microprocessor Supervisory Circuits _ BDTIC a Leading Distributor in China

MAX690A：Microprocessor Supervisory Circuits

Industry-Standard, Full-Function uP Supervisor

The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components. These parts provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) Battery-backup switching for CMOS RAM, CMOS µP, or other low-power logic. 3) A reset pulse if the optional watchdog timer has not been toggled within 1.6sec. 4) A 1.25V threshold detector for power-fail warning or low-battery detection, or to monitor a power supply other than +5V. The parts differ in their reset-voltage threshold levels and reset outputs. The MAX690A/MAX802L/MAX805L generate a reset pulse when the supply voltage drops below 4.65V, and the MAX692A/MAX802M generate a reset below 4.40V. The MAX802L/MAX802M guarantee power-fail accuracies to ±2%. The MAX805L is the same as the MAX690A except that RESET is provided instead of active-low RESET. All parts are available in 8-pin DIP and SO packages. The MAX690A/MAX802L are pin compatible with the MAX690 and MAX694. The MAX692A/MAX802M are pin compatible with the MAX692.

Key Features

Precision Supply Voltage Monitor:
- 4.65V for MAX690A/MAX802L/MAX805L
- 4.40V for MAX692A/MAX802M
Reset Time Delay: 200ms
Watchdog Timer: 1.6s Timeout
Battery-Backup Power Switching
200µA Quiescent Supply Current
50nA Quiescent Supply Current in Battery-Backup Mode
Voltage Monitor for Power-Fail or Low-Battery Warning
Power-Fail Accuracy Guaranteed to ±2% (MAX802L/M)
Guaranteed Active-Low RESET Assertion to VCC = 1V
8-Pin SO and DIP Packages

MAX690A, MAX692A, MAX802L, MAX802M, MAX805L: Typical Operating Circuit

Applications/Uses

Battery-Powered Computers/Controllers
Critical µP Monitoring
Intelligent Instruments

DataSheet

title	Download file
MAX690A-MAX805L Data Sheet	MAX690A-MAX805L.pdf

Parametrics

Part Number	Reset Thresh. (V)	Reset Out	I_CC (µA)	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Reset Thresh. (V)	Reset Out	max	Oper. Temp. (°C)	Package/Pins	See Notes
MAX690A	4.5 to 5.0	Active Low Push-Pull	350	-55 to +125 -40 to +85 0 to +70	CDIP(N)/8 PDIP(N)/8 SOIC(N)/8	$3.88 @1k
MAX692A	4.0 to 4.5	Active Low Push-Pull		-55 to +125 -40 to +85 0 to +70	CDIP(N)/8 PDIP(N)/8 SOIC(N)/8	$4.37 @1k
MAX802L	4.5 to 5.0	Active Low Push-Pull		-40 to +85 0 to +70	PDIP(N)/8 SOIC(N)/8	$4.04 @1k
MAX802M	4.0 to 4.5	Active Low Push-Pull		-40 to +85 0 to +70	PDIP(N)/8 SOIC(N)/8	$6.22 @1k
MAX805L	4.5 to 5.0	Active High Push-Pull		-55 to +125 -40 to +85 0 to +70	CDIP(N)/8 PDIP(N)/8 SOIC(N)/8	$3.55 @1k

Quality and Environmental Data

MAX690A.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX690AC/D	No Longer Available		DICE SALES,;NA pin;DICE;	0°C to +70°C	See data sheet
MAX690ACPA	No Longer Available	MAX690ACPA+	PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	No
MAX690ACPA+	Active		PDIP(N),;8 pin;79.7 mm²	0°C to +70°C	Lead Free
MAX690ACSA	No Longer Available	MAX690ACSA+	SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX690ACSA+	Active		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	Lead Free
MAX690ACSA+T	Active		SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	Lead Free
MAX690ACSA-T	No Longer Available	MAX690ACSA+T	SOIC(N),;8 pin;30.9 mm²	0°C to +70°C	No
MAX690AEJA	No Longer Available		CDIP(N),;8 pin;82.6 mm²	-40°C to +85°C	No
MAX690AEPA	No Longer Available	MAX690AEPA+	PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	No
MAX690AEPA+	Active		PDIP(N),;8 pin;79.7 mm²	-40°C to +85°C	Lead Free
Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX690AESA	No Longer Available	MAX690AESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX690AESA+	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX690AESA+T	Active		SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	Lead Free
MAX690AESA-T	No Longer Available	MAX690AESA+T	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX690AESA/GG8	Active		SOIC (;	-40°C to +85°C	See data sheet
MAX690AESA/GH9	No Longer Available	MAX690AESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX690AESA/GH9-T	No Longer Available	MAX690AESA+	SOIC(N),;8 pin;30.9 mm²	-40°C to +85°C	No
MAX690AMJA	Active		CDIP(N),;8 pin;82.6 mm²	-55°C to +125°C	No
MAX690AMJA/883B	Active		CDIP(N),;8 pin;82.6 mm²	-55°C to +125°C	No

MAX690A-MAX805L.pdf MAX805L

MAX690A.pdf MAX690A