S24042 Datasheet, PDF (1/14 Pages) Summit Microelectronics, Inc. – Precision RESET Controller and 4K I2C Memory With Both RESET and RESET Outputs

SUMMIT
MICROELECTRONICS, Inc.
Precision RESET Controller and 4K I²C Memory
With Both RESET and RESET Outputs
S24042/S24043
3 and 5 Volt Systems
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 25µA
• Memory Internally Organized 512 X 8
— Two Wire Serial Interface (I²C™)
– Bidirectional data transfer protocol
– Standard 100KHz and Fast 400KHz
BLOCK DIAGRAM
VCC
22
• High Reliability
— Endurance: 100,000 erase/write cycles
— Data retention: 100 years
• 8-Pin SOIC Packages
OVERVIEW
The 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 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 provides a precision VCC sense circuit and
two open drain outputs: one (RESET) drives high and the
other (RESET#) drives low whenever V_CC falls below
VTRIP. The S24043 is identical to the S24042 with the
exception being RESET is not bonded out on pin 7.
5kHz
OSCILLATOR
RESET
PULSE
GENERATOR
2 RESET#
SCL 6
SDA 5
+
VTRIP
RESET
–
CONTROL
1.26V
MODE
DECODE
ADDRESS
DECODER
WRITE
CONTROL
7 RESET
4
GND
DATA I/O
E2PROM
MEMORY
ARRAY
2011 T-BD 1.0
SUMMIT MICROELECTRONICS, Inc. • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone [phone] • Fax [phone] • www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 2000
2011 2.1 8/2/00
Characteristics subject to change without notice
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