參數(shù)資料
型號(hào): MCIMX507CVM8B
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PBGA400
封裝: 17 X 17 MM, 0.5 MM PITCH, ROHS COMPLIANT, PLASTIC, MABGA-400
文件頁數(shù): 59/120頁
文件大?。?/td> 1980K
代理商: MCIMX507CVM8B
Electrical Characteristics
i.MX50 Applications Processors for Consumer Products, Rev. 0
Freescale Semiconductor
43
4.5.7
DDR2 I/O AC Parameters
Table 30 shows the AC parameters for DDR2 I/O.
Table 30. DDR2 I/O AC Parameters
Parameter
Symbol
Min
Max
Unit
AC input logic high
Vih(ac)
Vref+0.25
-
V
AC input logic low
Vil(ac)
-
Vref-0.25
AC differential input voltage1
1Vid(ac) specifies the input differential voltage |Vtr-Vcp| required for switching, where Vtr is the
“true” input signal and Vcp is the “complementary” input signal. The Minimum value is equal to
Vih(ac)-Vil(ac)
Vid(ac)
0.5
ovdd
AC Input differential cross point voltage2
2The typical value of Vix(ac) is expected to be about 0.5*OVDD. and Vix(ac) is expected to track
variation of OVDD. Vix(ac) indicates the voltage at which differential input signal must cross.
Vix(ac)
0.5*ovdd
-0.175
0.5*ovdd +
0.175
AC output differential cross point voltage 3
3The typical value of Vox(ac) is expected to be about 0.5*OVDD and Vox(ac) is expected to track
variation in OVDD. Vox(ac) indicates the voltage at which differential output signal must cross.
Vox(ac)
0.5*ovdd
-0.125
0.5*ovdd+
0.125
Output propagation delay high to low
tPOHLD
3.5
ns
Output propagation delay low to high
tPOLHD
3.5
Input propagation delay high to low
tPIHLD
1.5
Input propagation delay low to high
tPILHD
1.5
Single output slew rate
tsr
0.4
2
V/ns
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