Datasheet

 2004 Microchip Technology Inc. DS21203M-page 3
24AA256/24LC256/24FC256
TABLE 1-2: AC CHARACTERISTICS
AC CHARACTERISTICS
Electrical Characteristics:
Industrial (I): VCC = +1.8V to 5.5V TA = -40°C to +85°C
Automotive (E): V
CC = +2.5V to 5.5V TA = -40°C to +125°C
Param.
No.
Sym Characteristic Min Max Units Conditions
1F
CLK Clock frequency —
—
—
—
100
400
400
1000
kHz 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC < 2.5V 24FC256
2.5V ≤ V
CC ≤ 5.5V 24FC256
2THIGH Clock high time 4000
600
600
500
—
—
—
—
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC < 2.5V 24FC256
2.5V ≤ V
CC ≤ 5.5V 24FC256
3T
LOW Clock low time 4700
1300
1300
500
—
—
—
—
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC < 2.5V 24FC256
2.5V ≤ V
CC ≤ 5.5V 24FC256
4TR SDA and SCL rise time
(Note 1)
—
—
—
1000
300
300
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC ≤ 5.5V 24FC256
5TF SDA and SCL fall time
(Note 1)
—
—
300
100
ns All except, 24FC256
1.8V ≤ V
CC ≤ 5.5V 24FC256
6T
HD:STA Start condition hold time 4000
600
600
250
—
—
—
—
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC < 2.5V 24FC256
2.5V ≤ V
CC ≤ 5.5V 24FC256
7TSU:STA Start condition setup time 4700
600
600
250
—
—
—
—
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC < 2.5V 24FC256
2.5V ≤ V
CC ≤ 5.5V 24FC256
8THD:DAT Data input hold time 0 — ns (Note 2)
9T
SU:DAT Data input setup time 250
100
100
—
—
—
ns 1.8V ≤ V
CC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC ≤ 5.5V 24FC256
10 T
SU:STO Stop condition setup time 4000
600
600
250
—
—
—
—
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC < 2.5V 24FC256
2.5V ≤ V
CC ≤ 5.5V 24FC256
11 TSU:WP WP setup time 4000
600
600
—
—
—
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC ≤ 5.5V 24FC256
12 THD:WP WP hold time 4700
1300
1300
—
—
—
ns 1.8V ≤ VCC < 2.5V
2.5V ≤ V
CC ≤ 5.5V
1.8V ≤ V
CC ≤ 5.5V 24FC256
Note 1: Not 100% tested. CB = 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. For endurance estimates in a specific
application, please consult the Total Endurance™ Model, which can be obtained from Microchip’s web site:
www.microchip.com.