X24645
ICmic E2PROMs are designed and tested for applications
requiring extended endurance. Inherent data
retention is greater than 100 years.
PIN CONFIGURATIONS
8-LEAD DIP & SOIC
V
NC
CC
1
2
8
7
PIN DESCRIPTIONS
Serial Clock (SCL)
S
1
S
2
X24645
WP
SCL
SDA
3
4
6
5
The SCL input is used to clock all data into and out of the
device.
V
SS
14-LEAD SOIC
Serial Data (SDA)
SDA is a bidirectional pin used to transfer data into and
out of the device. It is an open drain output and
NC
NC
NC
NC
1
2
14
13
may be wire-ORed with any number of open drain or
open collector outputs.
V
CC
NC
3
4
12
X24645 11
S
1
An open drain output requires the use of a pull-up
resistor. For selecting typical values, refer to the Pull-
WP
SCL
SDA
S
2
5
6
10
9
V
up resistor selection graph at the end of this data
sheet.
SS
NC
NC
7
8
Device Select (S1, S2)
20-LEAD TSSOP
The device select inputs (S1, S2) are used to set the first
and second bits of the 8-bit slave address. This
NC
NC
NC
1
2
20
19
V
CC
allows up to four X24645 devices to share a common bus.
These inputs can be static or actively driven. If
18
17
16
15
14
13
3
4
WP
NC
S
1
used statically they must be tied to V
or V
as
appropriate. If actively driven, they must be driven with
SS
CC
NC
NC
5
6
7
8
X24645
CMOS levels (driven to VCC or VSS).
NC
NC
NC
S
2
SCL
SDA
Write Protect (WP)
The write protect input controls the hardware write
protect feature. When held LOW, hardware write
V
SS
NC
NC
NC
NC
9
10
12
11
protection is disabled and the X24645 can be written
normally. When this input is held HIGH, and the WPEN
2783 ILL F02.4
bit in the write protect register is set HIGH, write
protection is enabled, and nonvolatile writes are
disabled to the selected blocks as well as the write
protect register itself.
PIN NAMES
Symbol
Description
S1, S2
Device Select Inputs
SDA
SCL
WP
Serial Data
Serial Clock
Write Protect
Ground
VSS
VCC
NC
Supply Voltage
No Connect
2783 FRM T01.1
2
ICMIC [ IC MICROSYSTEMS ]
