X24645P-2.7 XICOR [Xicor Inc.], X24645P-2.7 Datasheet - Page 2

• Manufacturer Part Number: X24645P-2.7
• Description: Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection
• Manufacturer: XICOR [Xicor Inc.]

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