24LC01B-I Datasheet, PDF (11/26 Pages) Microchip Technology – 1K I2C Serial EEPROM

24AA01/24LC01B
8.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 8-1.
TABLE 8-1: PIN FUNCTION TABLE
Name
A0
A1
A2
VSS
SDA
SCL
WP
VCC
PDIP
1
2
3
4
5
6
7
8
SOIC
1
2
3
4
5
6
7
8
TSSOP
1
2
3
4
5
6
7
8
DFN
1
2
3
4
5
6
7
8
8.1 A0, A1, A2
The A0, A1 and A2 pins are not used by the 24XX01.
They may be left floating or tied to either VSS or VCC.
8.2 Serial Address/Data Input/Output
(SDA)
The SDA input is a bidirectional pin used to transfer
addresses and data into and out of the device. Since
it is an open-drain terminal, the SDA bus requires a
pull-up resistor to VCC (typical 10 kΩ for 100 kHz,
2 kΩ for 400 kHz).
For normal data transfer, SDA is allowed to change
only during SCL low. Changes during SCL high are
reserved for indicating Start and Stop conditions.
MSOP
1
2
3
4
5
6
7
8
SOT23
Description
— Not Connected
— Not Connected
— Not Connected
2 Ground
3 Serial Address/Data I/O
1 Serial Clock
5 Write-Protect Input
4 +1.7V to 5.5V Power Supply
8.3 Serial Clock (SCL)
The SCL input is used to synchronize the data transfer
to and from the device.
8.4 Write-Protect (WP)
This pin must be connected to either VSS or VCC.
If tied to VSS, normal memory operation is enabled
(read/write the entire memory 00-7F).
If tied to VCC, write operations are inhibited. The entire
memory will be write-protected. Read operations are
not affected.
This feature allows the user to use the 24XX01 as a
serial ROM when WP is enabled (tied to VCC).
© 2007 Microchip Technology Inc.
DS21711G-page 11