ADM691A Series

Microprocessor Supervisor with Backup Battery Switchover, Adjustable Reset and Watchdog Periods, Chip Enable Signals, 4.65V Threshold Voltage, Watchdog, Battery Backup and Low VCC Status O/Ps and 250mA Output Current

Manufacturer: Analog Devices

Catalog

Part	Output	Reset Timeout [Min]	Supplier Device Package	Reset	Mounting Type	Number of Voltages Monitored	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [x]	Package / Case [y]	Type	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Reset Timeout	Package / Case	Package / Case
Analog Devices ADM691AARN-REEL7	Open Drain Push-Pull	140 ms	16-SOIC	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-SOIC	0.154 in	3.9 mm	Battery Backup Circuit
Analog Devices ADM691SQ	Open Drain Push-Pull		16-CERDIP	Active High/Active Low	Through Hole	1			16-CDIP			Battery Backup Circuit	0.3 in 7.62 mm	125 °C	-55 °C	35 ms
Analog Devices ADM691AR	Open Drain Push-Pull		16-SOIC	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-SOIC	0.295 in	7.5 mm	Battery Backup Circuit				35 ms
Analog Devices ADM691AARW-REEL	Open Drain Push-Pull	140 ms	16-SOIC	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-SOIC	0.295 in	7.5 mm	Battery Backup Circuit
Analog Devices ADM691AANZ	Open Drain Push-Pull	140 ms	16-PDIP	Active High/Active Low	Through Hole	1	85 °C	-40 °C	16-DIP			Battery Backup Circuit					0.3 in	7.62 mm
Analog Devices ADM691ARZ	Open Drain Push-Pull		16-SOIC	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-SOIC	0.295 in	7.5 mm	Battery Backup Circuit				35 ms
Analog Devices ADM691ARZ-REEL7	Open Drain Push-Pull		16-SOIC	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-SOIC	0.295 in	7.5 mm	Battery Backup Circuit				35 ms
Analog Devices ADM691AARN	Open Drain Push-Pull	140 ms	16-SOIC	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-SOIC	0.154 in	3.9 mm	Battery Backup Circuit
Analog Devices ADM691AARUZ	Open Drain Push-Pull	140 ms	16-TSSOP	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-TSSOP	0.173 in	4.4 mm	Battery Backup Circuit
Analog Devices ADM691AARW	Open Drain Push-Pull	140 ms	16-SOIC	Active High/Active Low	Surface Mount	1	85 °C	-40 °C	16-SOIC	0.295 in	7.5 mm	Battery Backup Circuit

Catalog

Key Features

• Low Power Consumption:

• Precision Voltage Monitor

• ±2% Tolerance on ADM800L/M

• Reset Time Delay—200 ms, or Adjustable

• 1 µA Standby Current

• Automatic Battery Backup Power Switching

• Fast Onboard Gating of Chip Enable Signals

• Also Available in TSSOP Package (ADM691A)

Description

The ADM691A /ADM693A/ ADM800L / ADM800M family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include mP reset, backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The family of products provides an upgrade for the MAX691A/93A/800M family of products.All parts are available in 16-pin DIP and SO packages. The ADM691A is also available in a space-saving TSSOP package. The following functionality is provided:Power-on reset output during power-up, power-down and brownout conditions. The circuitry remains operational with VCCas low as 1 V.Battery backup switching for CMOS RAM, CMOS micro-processor or other low power logic.A reset pulse if the optional watchdog timer has not been toggled within a specified time.A 1.25 V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5 V.