X40034 Datasheet | Intersil

FEATURES - Triple voltage detection and reset assertion - Standard reset threshold settings see selection table on page 5. - Adjust low voltage reset threshold voltages using special programming sequence - Reset signal valid to VCC = 1V - Monitor three seperate voltages - Fault detection register - Selectable power on reset timeout (0.05s, 0.2s, 0.4s, 0.8s) - Selectable watchdog timer interval (25ms, 200ms, 1.4s or off) - Debounced manual reset input - Low power CMOS - 25µA typical standby current, watchdog on - 6µA typical standby current, watchdog off - 400k Hz 2-wire interface - 2.7V to 5.5V power supply operation - Available in 14 Ld SOIC, TSSOP packages - Monitor voltages: 5V to 0.9V .. - Independent core voltage monitor - Pb-free plus anneal available (Ro HS pliant) APPLICATIONS - munication equipment - Routers, hubs, switches - Disk arrays, network storage BLOCK DIAGRAM V3MON - Industrial systems - Process control - Intelligent instrumentation - puter systems - puters - Network servers DESCRIPTION The X40030, X40031, X40034, X40035 bine power-on reset control, watchdog timer, supply voltage supervision, second and third voltage supervision, and manual reset, in one package. This bination lowers system cost, reduces board space requirements, and increases reliability. Applying voltage to VCC activates the power on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and system oscillator to stabilize before the processor can execute code. Low VCC detection circuitry protects the user’s system from low voltage conditions, resetting the system when VCC falls below the minimum VTRIP1 point. RESET/RESET is active until VCC returns to proper operating level and stabilizes. A second and third voltage monitor circuit tracks the unregulated supply to provide a power fail warning or monitors different power supply voltage. Three mon low voltage binations are available, however, Intersil’s unique circuits allows the threshold for either...