SUMMIT
MICROELECTRONICS, Inc.
S24022/S24023
3 and 5 Volt Systems
Precision RESET Controller and 2K I
2
C Memory
With Both RESET and
RESET
Outputs
FEATURES
• Precision Supply Voltage Monitor
— Dual reset outputs for complex
microcontroller systems
— Integrated memory write lockout
• Guaranteed RESET (RESET assertion
RESET)
RESET
to V
CC
=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 25
µ
A
• Memory Internally Organized 256 X 8
— Two Wire Serial Interface (I
2
C™)
– Bidirectional data transfer protocol
– Standard 100KHz and Fast 400KHz
•
•
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 E
2
PROM. They are fabricated
using SUMMIT's advanced CMOS E
2
PROM technology
and are suitable for both 3 and 5 volt systems.
The memory is internally organized as 256 x 8. It features
the I
2
C serial interface and software protocol allowing
operation on a simple two-wire bus.
The S24022 provides a precision V
CC
sense circuit and
two open drain outputs: one (RESET) drives high and the
other (RESET) drives low whenever V
CC
falls below
V
TRIP
. The S24023 is identical to the S24022 with the
exception being RESET is not bonded out on pin 7.
BLOCK DIAGRAM
VCC
VCC
8
2
5KHz
Oscillator
RESET
PULSE
GENERATOR
RESET
VCC
+
-
GND
4
1.26V
VTRIP
RESET
CONTROL
7
RESET
SCL 6
SDA 5
NC 1
NC 3
MODE
DECODE
ADDRESS
DECODER
WRITE
CONTROL
DATA I/O
E
2
PROM
MEMORY
ARRAY
2010 ILL2 1.3
SUMMIT MICROELECTRONICS, Inc.
•
300 Orchard City Drive, Suite 131
•
Campbell, CA 95008
•
Telephone 408-378-6461
•
Fax 408-378-6586
•
www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 1998
2010 1.4 5/3/98
Characteristics subject to change without notice
1
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
