x24640 Intersil Corporation, x24640 Datasheet - Page 2

• Manufacturer Part Number: x24640
• Description: 400khz 2-wire Serial E 2 Prom With Block Lock
• Manufacturer: Intersil Corporation

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
the first three bits of the 8-bit slave address. This
allows up to eight devices to share a common bus.
These inputs can be static or actively driven. If used
statically they must be tied to V
priate. 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. When this input is held HIGH,
and the WPEN bit in the Write Protect Register is set
HIGH, the Write Protect Register is protected,
preventing changes to the Block Lock Protection and
WPEN bits.
X24640
2
PROMs are designed and tested for applica-
0
, S
1
, S
CC
2
)
0
or V
, S
1
SS
, S
SS
).
2
or V
) are used to set
CC
as appro-
2
PIN NAMES
PIN CONFIGURATION
* SOIC Measurement
0.300"
Max
S
SDA
SCL
WP
V
V
NC
Symbol
* .197”
0
SS
CC
, S
1
, S
V SS
NC
NC
NC
NC
NC
NC
V SS
S
S
S
2
S 0
S 1
S 2
0
1
2
8-Lead PDIP/SOIC
20-Lead TSSOP
1
2
3
4
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
X24640
X24640
* .244”
0.252"
Device Select Inputs
Serial Data
Serial Clock
Write Protect
Ground
Supply Voltage
No Connect
20
19
18
17
16
15
14
13
12
20
19
18
17
16
15
14
13
12
11
11
Description
8
7
6
5
Not to scale
V CC
WP
SCL
SDA
NC
V CC
WP
NC
NC
NC
SCL
SDA
NC
NC
7038 FM 02
7038 FM T01