S24022 Datasheet, PDF (1/14 Pages) Summit Microelectronics, Inc. – Precision RESET Controller and 2K I2C Memory With Both RESET and RESET Outputs

SUMMIT
MICROELECTRONICS, Inc.
Precision RESET Controller and 2K I²C Memory
With Both RESET and RESET Outputs
S24022/S24023
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 256 X 8
— Two Wire Serial Interface (I²C™)
– Bidirectional data transfer protocol
– Standard 100KHz and Fast 400KHz
BLOCK DIAGRAM
• High Reliability
— Endurance: 1,000,000 erase/write cycles
— Data retention: 100 years
• 8-Pin PDIP or SOIC Packages
OVERVIEW
The S24022 and S24023 are power supervisory devices
with 2,048 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 256 x 8. It features
the I²C serial interface and software protocol allowing
operation on a simple two-wire bus.
The S24022 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 S24023 is identical to the S24022 with the
exception being RESET is not bonded out on pin 7.
VCC
VCC ₈
5KHz
Oscillator
RESET
PULSE
GENERATOR
2
RESET
VCC
GND 4
1.26V
+
VTRIP
RESET
-
CONTROL
7
RESET
SCL 6
SDA ₅
NC 1
NC 3
MODE
DECODE
DATA I/O
ADDRESS
DECODER
WRITE
CONTROL
E²PROM
MEMORY
ARRAY
2010 ILL2 1.3
SUMMIT MICROELECTRONICS, Inc. • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone [phone] • Fax [phone] • www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 1998
2010 1.4 5/3/98
Characteristics subject to change without notice
1