Data Sheet

24AA256/24LC256/24FC256
DS20001203X-page 4 1998-2021 Microchip Technology Inc.
TABLE 1-2: AC CHARACTERISTICS
AC CHARACTERISTICS
Industrial (I): V
CC = +1.7V to 5.5V TA = -40°C to +85°C
Extended (E): V
CC = +1.7V to 5.5V TA = -40°C to +125°C
Param.
No.
Symbol Characteristic Minimum Maximum Units Conditions
1F
CLK Clock Frequency
 100 kHz 1.7V V
CC 2.5V
 400 kHz 2.5V
VCC 5.5V
 400 kHz 1.7V
VCC 2.5V (24FC256)
 1000 kHz 2.5V
VCC 5.5V (24FC256)
2T
HIGH Clock High Time
4000  ns 1.7V
VCC 2.5V
600  ns 2.5V
VCC 5.5V
600  ns 1.7V
VCC 2.5V (24FC256)
500  ns 2.5V
VCC 5.5V (24FC256)
3T
LOW Clock Low Time
4700  ns 1.7V
VCC 2.5V
1300  ns 2.5V
VCC 5.5V
1300  ns 1.7V
VCC 2.5V (24FC256)
500  ns 2.5V
VCC 5.5V (24FC256)
4T
R SDA and SCL Rise Time
 1000 ns 1.7V
VCC 2.5V (Note 1)
 300 ns 2.5V
VCC 5.5V (Note 1)
 300 ns
1.7V
VCC 5.5V (24FC256)
(Note 1)
5T
F SDA and SCL Fall Time
 300 ns All except 24FC256 (Note 1)
 100 ns
1.7V
VCC 5.5V (24FC256)
(Note 1)
6T
HD:STA Start Condition Hold Time
4000  ns 1.7V
VCC 2.5V
600  ns 2.5V
VCC 5.5V
600  ns 1.7V
VCC 2.5V (24FC256)
250  ns 2.5V
VCC 5.5V (24FC256)
7T
SU:STA Start Condition Setup Time
4700  ns 1.7V
VCC 2.5V
600  ns 2.5V
VCC 5.5V
600  ns 1.7V
VCC 2.5V (24FC256)
250  ns 2.5V
VCC 5.5V (24FC256)
8T
HD:DAT Data Input Hold Time 0  ns Note 2
9T
SU:DAT Data Input Setup Time
250  ns 1.7V
VCC 2.5V
100  ns 2.5V
VCC 5.5V
100  ns 1.7V
VCC 5.5V (24FC256)
10 T
SU:STO Stop Condition Setup Time
4000  ns 1.7V
VCC 2.5V
600  ns 2.5V
VCC 5.5V
600  ns 1.7V
VCC 2.5V (24FC256)
250  ns 2.5V
VCC 5.5V (24FC256)
Note 1: Not 100% tested. C
B = total capacitance of one bus line in pF.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region
(minimum 300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions.
3: The combined T
SP and VHYS specifications are due to new Schmitt Trigger inputs, which provide improved
noise spike suppression. This eliminates the need for a T
I specification for standard operation.
4: This parameter is not tested but ensured by characterization.