參數(shù)資料
型號(hào): HYB18T1G800AFL-5
廠商: INFINEON TECHNOLOGIES AG
英文描述: 1 Gbit DDR2 SDRAM
中文描述: 1千兆位DDR2內(nèi)存
文件頁(yè)數(shù): 66/89頁(yè)
文件大小: 1752K
代理商: HYB18T1G800AFL-5
Page 66 Rev. 1.02 May 2004
INFINEON Technologies
HYB18T1G400/800/160AF
1Gb DDR2 SDRAM
5.2.3 Differential DC and AC Input and Output Logic Levels
Symbol
Parameter
min.
max.
Units
Notes
VIN(dc)
DC input signal voltage
-0.3
VDDQ + 0.3
1
VID(dc)
DC differential input voltage
0.25
VDDQ + 0.6
2
VID(ac)
AC differential input voltage
0.5
VDDQ + 0.6
V
3
VIX(ac)
AC differential cross point input voltage
0.5 * VDDQ - 0.175
0.5 * VDDQ + 0.175
V
4
VOX(ac)
AC differential cross point output voltage
0.5 * VDDQ - 0.125
0.5 * VDDQ + 0.125
V
5
notes:
1) VIN(dc) specifies the allowable DC execution of each input of differential pair such as CK, CK, DQS, DQS etc.
2) VID(dc) specifies the input differential voltage VTR - VCP required for switching. The minimum value is equal to VIH(dc) - VIL(dc).
3) VID(ac) specifies the input differential voltage VTR - VCP required for switching. The minimum value is equal to VIH(ac) - VIL(ac).
4) The value of VIX(ac) is expected to equal 0.5 x VDDQ of the transmitting device and VIX(ac) is expected to track variations in VDDQ.
VIX(ac) indicates the voltage at which differential input signals must cross.
5) The value of VOX(ac) is expected to equal 0.5 x VDDQ of the transmitting device and VOX(ac) is expected to track variations in
VDDQ. VOX(ac) indicates the voltage at which differential input signals must cross.
Crossing Point
VDDQ
VSSQ
VID
VIX or VOX
VTR
VCP
SSTL18_3
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