DatasheetsPDF.com

X40431 Dataheets PDF



Part Number X40431
Manufacturers Intersil Corporation
Logo Intersil Corporation
Description (X40430 - X40435) Triple Voltage Monitor
Datasheet X40431 DatasheetX40431 Datasheet (PDF)

® X40430, X40431, X40434, X40435 4Kbit EEPROM FN8251.0 Data Sheet July 29, 2005 Triple Voltage Monitor with Integrated CPU Supervisor FEATURES • Monitoring voltages: 5V to 9V • Independent core voltage monitor • Triple voltage detection and reset assertion —Standard reset threshold settings. See selection table on page 2. —Adjust low voltage reset threshold voltages using special programming sequence —Reset signal valid to VCC = 1V —Monitor three separate voltages • Fault detection register • .

  X40431   X40431


Document
® X40430, X40431, X40434, X40435 4Kbit EEPROM FN8251.0 Data Sheet July 29, 2005 Triple Voltage Monitor with Integrated CPU Supervisor FEATURES • Monitoring voltages: 5V to 9V • Independent core voltage monitor • Triple voltage detection and reset assertion —Standard reset threshold settings. See selection table on page 2. —Adjust low voltage reset threshold voltages using special programming sequence —Reset signal valid to VCC = 1V —Monitor three separate 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 • Memory security www.DataSheet4U.com • 4Kbits of EEPROM —16 byte page write mode —5ms write cycle time (typical) • Built-in inadvertent write protection —Power-up/power-down protection circuitry —Block lock protect 0, or 1/2, of EEPROM • 400kHz 2-wire interface • 2.7V to 5.5V power supply operation • Available packages —14-lead SOIC, TSSOP APPLICATIONS • Communication Equipment —Routers, Hubs, Switches —Disk Arrays, Network Storage • Industrial Systems —Process Control —Intelligent Instrumentation • Computer Systems —Computers —Network Servers DESCRIPTION The X40430, X40431, X40434, X40435 combines power-on reset control, watchdog timer, supply voltage supervision, second and third voltage supervision, manual reset, and Block Lock™ protect serial EEPROM in one package. This combination 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 common low voltage combinations are available. However, Intersil’s unique circuits allows the threshold for either voltage monitor to be reprogrammed to meet specific system level requirements or to fine-tune the threshold for applications requiring higher precision. A manual reset input provides debounce circuitry for minimum reset component count. The Watchdog Timer provides an independent protection mechanism for microcontrollers. When the microcontroller fails to restart a timer within a selectable time out interval, the device activates the WDO signal. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power. The memory portion of the device is a CMOS Serial EEPROM array with Intersil’s Block Lock protection. The array is internally organized as x 8. The device features a 2-wire interface and software protocol allowing operation on an I2C bus. The device utilizes Intersil’s proprietary Direct Write™ cell, providing a minimum endurance of 100,000 cycles and a minimum data retention of 100 years. 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. X40430, X40431, X40434, X40435 BLOCK DIAGRAM V3MON + V3 Monitor Logic VTRIP3 V3FAIL VCC or V2MON* + V2FAIL VTRIP2 V2MON V2 Monitor Logic - SDA Data Register Command Decode Test & Control Logic Fault Detection Register Status Register EEPROM Array Watchdog and Reset Logic WDO WP MR SCL VCC (V1MON) + *X40430, X40431=V2MON X40434, X40435 = VCC VCC Monitor Logic VTRIP1 - Power-on, Manual Reset Low Voltage Reset Generation RESET X40430/34 RESET X40431/35 LOWLINE Device Expected System Voltages Vtrip1(V) 2.0–4.75* 4.55–4.65* 4.35–4.45* 2.95–3.05* 2.0–4.75* 4.55–4.65* 4.55–4.65* 4.55–4.65* Vtrip2(V) 1.70–4.75 2.85–2.95 2.55–2.65 2.15–2.25 0.90–3.50* 1.25–1.35* 1.25–1.35* 0.95–1.05* Vtrip3(V) 1.70–4.75 1.65–1.75 1.65–1.75 1.65–1.75 1.70–4.75 3.05–3.15 2.85–2.95 2.85–2.95 POR (system) RESET = X40430 RESET = X40431 X40430, X40431 -A 5V; 3V or 3.3V; 1.8V -B 5V; 3V; 1.8V -C 3.3V; 2.5V; 1.8V X40434, X40435 -A 5V; 3.3V; 1.5V -B 5V; 3V or 3.3V; 1.5V -C 5V; 3 or 3.3V; 1.2V RESET = X40434 RESET = X40435 *Voltage monitor requires Vcc to operate. Others are independent of Vcc. PIN CONFIGURATION X40430, X40434 14-Pin SOIC, TSSOP V2FAIL V2MON LOWLINE NC MR RESET VSS 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VCC WDO V3FAIL V3MON WP SCL SDA V2FAIL V2MON LOWLINE NC MR RESET VSS X40431, X40435 14-Pin.


X40430 X40431 X40435


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)