24LC21 MicrochipTechnology, 24LC21 Datasheet - Page 3

• Manufacturer Part Number: 24LC21
• Description: 1K2.5VDualModeI2CSerialEEPROM
• Manufacturer: MicrochipTechnology

TABLE 1-3:
Clock frequency
Clock high time
Clock low time
SDA and SCL rise time
SDA and SCL fall time
START condition hold time T
START condition setup
time
Data input hold time
Data input setup time
STOP condition setup time T
Output valid from clock
Bus free time
Output fall time from V
min to V
Input filter spike suppres-
sion (SDA and SCL pins)
Write cycle time
Transmit-Only Mode Parameters
Output valid from VCLK
VCLK high time
VCLK low time
Mode transition time
Transmit-Only power up
time
Endurance
Note 1: Not 100% tested. C
1996 Microchip Technology Inc.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region (min-
3: The combined T
4: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific appli-
Parameter
IL
imum 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.
noise and spike suppression. This eliminates the need for a T
cation, please consult the Total Endurance Model which can be obtained on our BBS or website.
max
AC CHARACTERISTICS
IH
SP
and V
T
B
Symbol
T
T
T
T
T
T
HD
HD
SU
SU
SU
T
F
T
T
T
= total capacitance of one bus line in pF.
T
VHIGH
T
T
VLOW
T
HIGH
LOW
T
T
VPU
—
CLK
BUF
VAA
VHZ
WR
AA
OF
SP
:
:
:
:
:
R
F
STO
STA
STA
DAT
DAT
HYS
specifications are due to new Schmitt trigger inputs which provide improved
Standard Mode
4000
4700
4000
4700
4000
4700
4000
4700
10M
Min
250
—
—
—
—
—
—
—
—
—
0
0
1000
3500
2000
Max
100
300
250
500
50
10
—
—
—
—
—
—
—
—
—
—
—
—
Vcc= 4.5 - 5.5V
20 + .1
1300
1300
1300
10M
Min
600
600
600
100
600
600
C
Fast Mode
—
—
—
—
—
—
—
—
0
0
B
1000
Max
400
300
300
900
250
500
I
50
10
—
—
—
—
—
—
—
—
—
—
—
—
specification for standard operation.
cycles
Units
kHz
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
(Note 1)
(Note 1)
After this period the first clock
pulse is generated
Only relevant for repeated
START condition
(Note 2)
(Note 2)
Time the bus must be free
before a new transmission
can start
(Note 1), C
(Note 3)
Byte or Page mode
25 C, Vcc = 5.0V, Block Mode
(Note 4)
24LC21
Remarks
B
DS21095F-page 3
100 pF