Features: • Precision Supply Voltage Monitor
- Dual reset outputs for complex microcontroller systems
- Integrated memory write lockout
• Guaranteed RESET (RESET#) assertion to VCC=1V
• Power-Fail Accuracy Guaranteed
• No External Components
• 3 and 5 Volt system versions
• Low Power CMOS
- Active current less than 3mA
- Standby current less than 25A
• Memory Internally Organized 512 X 8
- Two Wire Serial Interface (I2C™)
Bidirectional data transfer protocol
Standard 100KHz and Fast 400KHz
• High Reliability
- Endurance: 100,000 erase/write cycles
- Data retention: 100 years
• 8-Pin SOIC PackagesApplicationThe S24042/43 provides a precision RESET controller that ensures correct system operation during brown-out and power-up/-down conditions. It is configured with two open drain RESET outputs; pin 7 is an active high output and pin 2 is an active low output.
During power-up, the RESET outputs remain active until VCC reaches the VTRIP threshold and will continue driving the outputs for approximately 200ms after reaching VTRIP. The RESET outputs will be valid so long as VCC is > 1.0V. During power-down, the RESET outputs will begin driving active when VCC falls below VTRIP.
The RESET pins are I/Os; therefore, the S24042/43 can act as a signal conditioning circuit for an externally applied reset. The inputs are edge triggered; that is, the RESET input will initiate a reset timeout after detecting a low to high transition and the RESET# input will initiate a reset timeout after detecting a high to low transition. Refer to the applications Information section for more details on device operation as a reset conditioning circuit.
Pinout
SpecificationsTemperature Under Bias ..................................................... -40°C to +85°C
Storage Temperatur........................................................... -65°C to +125°C
Soldering Temperature (less than 10 seconds) ................................... 300°C
Supply Voltage .................................................................................. 0 to 6.5V
Voltage on Any Pin ............................................................. -0.3V to VCC+0.3V
ESD Voltage (JEDEC method) ............................................................... 2,000V
NOTE: These are STRESS ratings only. Appropriate conditions for operating these devices are given elsewhere in this specification. Stresses beyond those listed here may permanently damage the part. Prolonged exposure to maximum ratings may affect device reliability.DescriptionThe S24042 and S24043 are power supervisory devices with 4,096 bits of serial E2PROM. They are fabricated using SUMMIT's advanced CMOS E2PROM technology and are suitable for both 3 and 5 volt systems.
The S24042 and S24043 memory is internally organized as 512 x 8. It features the I2C serial interface and software protocol allowing operation on a simple two-wire bus.
The S24042 and S24043 provides a precision VCC sense circuit and two open drain outputs: one (RESET) drives high and the other (RESET#) drives low whenever VCC falls below VTRIP. The S24043 is identical to the S24042 with the exception being RESET is not bonded out on pin 7.
S24043 Data Sheet
