X40020 Datasheet | Intersil

FEATURES - Dual voltage detection and reset assertion - Three standard reset threshold settings (4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V) - VTRIP2 programmable down to 0.9V - Adjust low voltage reset threshold voltages using special programming sequence - Reset signal valid to VCC = 1V - Monitor two voltages or detect power fail - Battery switch backup - VOUT: 5m A to 50m A from VCC; 250µA from VBATT - Fault detection register - Selectable power-on reset timeout (0.05s, 0.2s, 0.4s, 0.8s) - Selectable watchdog timer interval (25ms, 200ms, 1.4s, off) - Debounced manual reset input - Low power CMOS - 25µA typical standby current, watchdog on - 6µA typical standby current, watchdog off - 1µA battery current in backup mode - 400k Hz 2-wire interface .. - 2.7V to 5.5V power supply operation - Available packages - 14-lead SOIC, TSSOP - Monitor voltages: 5V to 1.6V - Memory security - Pb-free plus anneal available (Ro HS pliant) APPLICATIONS - munications equipment - Routers, hubs, switches - Disk arrays - Industrial systems - Process control - Intelligent instrumentation - puter systems - Desktop puters - Network servers X40020, X40021 Standard VTRIP1 Level Standard VTRIP2, Level Suffix 4.6V (±1%) 2.9V(±1.7%) -A 4.6V (±1%) 2.6V (±2%) -B 2.9V(±1.7%) 1.6V (±3%) -C See “Ordering Information” for more details For Custom Settings, call Intersil. DESCRIPTION The X40020 bines power-on reset control, watchdog timer, supply voltage supervision, and secondary 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. BLOCK...