M24256-DFMC6TP(2012) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M24256-DFMC6TP Datasheet PDF : 40 Pages
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M24256-BW M24256-BR M24256-BF M24256-DR M24256-DF
DC and AC parameters
Table 17. 1 MHz AC characteristics
Symbol Alt.
Parameter(1)
Min.
Max.
Unit
fC
tCHCL
tCLCH
tXH1XH2
tXL1XL2
tQL1QL2(3)
tDXCX
tCLDX
tCLQX(5)
tCLQV(6)
tCHDL
tDLCL
tCHDH
tDHDL
tWLDL(8)(3)
tDHWH(9)(3)
tW
tNS(3)
fSCL Clock frequency
tHIGH Clock pulse width high
tLOW Clock pulse width low
tR Input signal rise time
tF Input signal fall time
tF SDA (out) fall time
tSU:DAT Data in setup time
tHD:DAT Data in hold time
tDH Data out hold time
tAA Clock low to next data valid (access time)
tSU:STA Start condition setup time
tHD:STA Start condition hold time
tSU:STO Stop condition setup time
tBUF
Time between Stop condition and next Start
condition
tSU:WC WC set up time (before the Start condition)
tHD:WC WC hold time (after the Stop condition)
tWR Write time
Pulse width ignored (input filter on SCL and
SDA)
0
260
500
(2)
(2)
20(4)
50
0
100
-
250
250
250
500
0
1
-
-
1
-
-
(2)
(2)
120
-
-
-
450(7)
-
-
-
-
-
-
5
80(10)
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
ms
ns
1. Only for M24256 devices identified by the process letter K.
2. There is no min. or max. values for the input signal rise and fall times. It is however recommended by the
I²C specification that the input signal rise and fall times be less than 120 ns when fC < 1 MHz.
3. Characterized only, not tested in production.
4. With CL = 10 pF.
5. To avoid spurious Start and Stop conditions, a minimum delay is placed between SCL=1 and the falling or
rising edge of SDA.
6. tCLQV is the time (from the falling edge of SCL) required by the SDA bus line to reach either 0.3 VCC or
0.7 VCC, assuming that the Rbus × Cbus time constant is within the values specified in Figure 12.
7. 500 ns for the previous products.
8. WC=0 set up time condition to enable the execution of a WRITE command.
9. WC=0 hold time condition to enable the execution of a WRITE command.
10. 50 ns for previous products.
Doc ID 6757 Rev 30
29/40
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