24FC32 Datasheet, PDF (11/12 Pages) Microchip Technology – 32K 5.0V 1 MHz I 2 C Smart Serial EEPROM

8.0 PIN DESCRIPTIONS
8.1 A0, A1, A2 Chip Address Inputs
The A0..A2 inputs are used by the 24FC32 for multiple
device operation and conform to the two-wire bus
standard. The levels applied to these pins define the
address block occupied by the device in the address
map. A particular device is selected by transmitting the
corresponding bits (A2, A1, A0) in the control byte
(Figure 3-3).
8.2 SDA Serial Address/Data Input/Output
This is a bidirectional pin used to transfer addresses
and data into and data out of the device. It is an open
drain terminal, therefore the SDA bus requires a pullup
resistor to VCC (typical 1KΩ, must consider total bus
capacitance and maximum rise/fall times).
For normal data transfer SDA is allowed to change only
during SCL low. Changes during SCL high are reserved
for indicating the START and STOP conditions.
8.3 SCL Serial Clock
This input is used to synchronize the data transfer from
and to the device.
24FC32
© 1996 Microchip Technology Inc.
DS21126B-page 3-11