MCIMX257DJM4A Freescale, MCIMX257DJM4A Datasheet - Page 37

• Manufacturer Part Number: MCIMX257DJM4A
• Manufacturer: Freescale

Specifications of MCIMX257DJM4A

• Operating Temperature (min): -20C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

3.6.3.2
Table 25
Freescale Semiconductor
Duty cycle
Clock frequency
Output pad transition times (max. drive)
Output pad transition times (high drive)
Output pad transition times (standard drive)
Output pad propagation delay (max. drive),
50%–50%
Output pad propagation delay (high drive),
50%–50%
Output pad propagation delay (standard
drive), 50%–50%
Output pad propagation delay (max. drive),
40%–60%
Output pad propagation delay (high drive),
40%–60%
Output pad propagation delay (standard
drive), 40%–60%
Output enable to output valid delay (max.
drive), 50%–50%
Output enable to output valid delay (high
drive), 50%–50%
Output enable to output valid delay (standard
drive), 50%–50%
Output enable to output valid delay (max.
drive), 40%–60%
Output enable to output valid delay (high
drive), 40%–60%
Output enable to output valid delay (standard
drive), 40%–60%
shows AC parameters for SDRAM I/O.
DDR_TYPE = 01 SDRAM I/O AC Parameters and Requirements
Parameter
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 6
Table 25. AC Parameters for SDRAM I/O
Symbol
Fduty
tpo
tpo
tpo
tpo
tpo
tpo
tpv
tpv
tpv
tpv
tpv
tpv
tpr
tpr
tpr
f
Condition
25 pF
50 pF
25 pF
50 pF
25 pF
50 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
15 pF
35 pF
Load
—
—
Rise/Fall
0.82/0.87
1.56/1.67
1.23/1.31
2.31/2.47
2.44/2.60
4.65/4.99
0.97/1.19
2.85/3.21
1.15/1.39
3.57/3.91
2.01/1.57
5.73/6.05
1.06/1.26
1.38/1.38
1.15/1.20
1.75/1.67
1.91/2.01
2.88/2.56
0.90/1.27
1.07/1.77
1.01/1.48
1.37/2.33
1.32/2.14
2.04/3.67
1.03/1.34
1.16/1.74
1.11/1.51
1.39/2.10
1.35/2.03
1.91/3.23
Min.
40
—
1.14/1.13
2.13/2.09
1.71/1.68
3.22/3.12
3.38/3.27
6.38/6.23
1.69/0.75
2.02/2.30
1.72/1.93
2.54/2.85
2.45/2.69
4.10/4.51
1.53/1.73
1.96/2.23
1.72/1.93
2.37/2.66
2.30/2.52
3.59/3.97
1.44/1.89
1.66/2.51
1.58/2.16
2.06/3.09
2.02/3.00
3.00/4.91
1.54/1.94
1.74/2.44
1.65/2.15
2.03/2.89
1.99/2.83
2.76/4.30
Typ.
50
—
1.62/1.50
3.015/2.7
2.39/2.22
4.53/4.16
4.73/4.38
9.05/8.23
2.17/2.46
2.93/3.27
2.51/2.77
3.66/3.97
3.54/3.77
5.84/6.13
2.18/2.47
2.78/3.12
2.45/2.71
3.35/3.67
3.26/3.50
5.06/5.36
2.19/2.87
2.51/3.69
2.38/3.23
3.06/4.46
3.01/4.36
4.40/6.90
2.26/2.88
2.55/3.54
2.43/3.16
2.95/4.13
2.89/4.03
3.98/6.01
Rise/Fall
Max.
125
60
7
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
Notes
—
—
1
1
1
1
1
37