ADM8691ARN-REEL

ADM8691ARN-REEL FEATURES

Upgrade for the ADM690, ADM691, ADM695 andfor the MAX690, MAX691, MAX695Specified over temperatureLow power consumption: 0.7 mWPrecision voltage monitorReset assertion down to 1 V VCCLow switch on resistance: 0.7 Ω normal, 7 Ω in backupHigh current drive: 100 mAWatchdog timer: 100 ms, 1.6 sec, or adjustableStandby current: 400 nAAutomatic battery backup power switchingExtremely fast gating of chip enable signals (3 ns)Voltage monitor for power failAvailable in TSSOP package

ADM8691ARN-REEL APPLICATIONS

Microprocessor systemsComputersControllersIntelligent instrumentsAutomotive systems

ADM8691ARN-REEL GENERAL DESCRIPTION

The ADM8690/ADM8691/ADM8695 supervisory circuits offercomplete single-chip solutions for power supply monitoring andbattery control functions in microprocessor systems. These func-tions include microprocessor reset, backup battery switchover,watchdog timer, CMOS RAM write protection, and power failurewarning. The complete family provides a variety of configurationsto satisfy most microprocessor system requirements.The ADM8690/ADM8691/ADM8695 are fabricated using anadvanced epitaxial CMOS process that combines low powerconsumption (0.7 mW), extremely fast chip enable gating (3 ns),and high reliability. RESET assertion is guaranteed with VCC aslow as 1 V. In addition, the power switching circuitry is designedfor minimal voltage drop, thereby permitting increased outputcurrent drive of up to 100 mA without the need for an externalpass transistor.See Table 1 for a product selection guide listing the character-istics of each device. To place an order, see the Ordering Guide.Table 1. Product Selection GuidePart No.Nominal ResetTimeNominal VCCReset ThresholdNominal WatchdogTimeout PeriodBattery BackupSwitchingBase Drive,Ext PNPChip EnableSignalsADM869050 ms4.65 V1.6 secYesNoNoADM869150 ms or ADJ4.65 V100 ms, 1.6 sec, ADJYesYesYesADM8695200 ms or ADJ4.65 V100 ms, 1.6 sec, ADJYesYesYes