CAT1025 CATALYST [Catalyst Semiconductor], CAT1025 Datasheet - Page 3

• Manufacturer Part Number: CAT1025
• Description: Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM and Manual Reset
• Manufacturer: CATALYST [Catalyst Semiconductor]

For supervisory circuits with embedded 16k EEPROM, please refer to the CAT1161, CAT1162 and CAT1163
data sheets.
PIN DESCRIPTION
RESET/RESET
(RESET CAT1025 Only)
These are open drain pins and RESET can be used as a
manual reset trigger input. By forcing a reset condition on
the pin the device will initiate and maintain a reset condition.
The RESET pin must be connected through a pull-down
resistor, and the RESET pin must be connected through a
pull-up resistor.
SDA:
The bidirectional serial data/address pin is used to transfer
all data into and out of the device. The SDA pin is an open
drain output and can be wire-ORed with other open drain
or open collector outputs.
SCL:
Serial clock input.
CAT10XX FAMILY OVERVIEW
C
C
C
C
C
C
C
D
A
A
A
A
A
A
A
e
T
T
T
T
T
T
T
v
1
1
1
1
1
1
1
c i
0
0
0
0
0
0
0
RESET
RESET
RESET:
SERIAL DATA ADDRESS
SERIAL CLOCK
e
2
2
2
2
2
2
RESET
2
2
4
5
6
7
3
1
n I
M
R
p
a
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t u
n
s
u
RESET OUTPUTS
t e
P
l a
n i
W
a
c t
h
d
o
g
W
M
a
S
S
o
c t
W
W
P
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D
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h
I D
I D
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A
A
d
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P
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3
W
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P
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e t
MR:
MR:
MR:
MR:
MR:
Manual Reset input is a debounced input that can be
connected to an external source for Manual Reset.
Pulling the MR input low will generate a Reset condition.
Reset outputs are active while MR input is low and for
the reset timeout period after MR returns to high. The
input has an internal pull-up resistor.
WP (CAT1025 Only):
When tied to V
to the entire array are allowed. When tied to V
entire array is protected. This input has an internal pull
down resistor.
o i
n
V
MANUAL RESET INPUT
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d
A
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g
p
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or left unconnected write operations
e
n
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WRITE PROTECT INPUT
R
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: T
CAT1024, CAT1025
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Doc No. 3008, Rev. M
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2
2
2
2
2
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k
k
k
k
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