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HY5PS121621CFP-S6I 数据表(PDF) 13 Page - Hynix Semiconductor

部件名 HY5PS121621CFP-S6I
功能描述  512Mb DDR2 SDRAM
Download  38 Pages
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制造商  HYNIX [Hynix Semiconductor]
网页  http://www.skhynix.com/kor/main.do
标志 HYNIX - Hynix Semiconductor

HY5PS121621CFP-S6I 数据表(HTML) 13 Page - Hynix Semiconductor

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Rev. 0.8 / Oct. 2007
13
1HY5PS12421C(L)FP-xI
1HY5PS12821C(L)FP-xI
1HY5PS121621C(L)FP-xI
3.2.4 Differential Input AC logic Level
3.2.5 Differential AC output parameters
Symbol
Parameter
Min.
Max.
Units
Notes
VID (ac)
ac differential input voltage
0.5
VDDQ + 0.6
V
1
VIX (ac)
ac differential cross point voltage
0.5 * VDDQ - 0.175
0.5 * VDDQ + 0.175
V
2
1. VIN(DC) specifies the allowable DC execution of each input of differential pair such as CK, CK, DQS, DQS,
LDQS, LDQS, UDQS and UDQS.
2. VID(DC) specifies the input differential voltage |VTR -VCP | required for switching, where VTR is the true input
(such as CK, DQS, LDQS or UDQS) level and VCP is the complementary input (such as CK, DQS, LDQS
or UDQS) level. The minimum value is equal to VIH(DC) - V IL(DC).
Note:
1. VID(AC) specifies the input differential voltage |VTR -VCP | required for switching, where VTR is the true input
signal (such as CK, DQS, LDQS or UDQS) and VCP is the complementary input signal (such as CK, DQS, LDQS
or UDQS). The minimum value is equal to V IH(AC) - V IL(AC).
2. The typical value of VIX(AC) is expected to be about 0.5 * 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.
Symbol
Parameter
Min.
Max.
Units Notes
VOX (ac)
ac differential cross point voltage
0.5 * VDDQ - 0.125 0.5 * VDDQ + 0.125
V
1
Note:
1. The typical value of VOX(AC) is expected to be about 0.5 * V DDQ of the transmitting device and VOX(AC) is
expected to track variations in VDDQ . VOX(AC) indicates the voltage at whitch differential output signals
must cross.
VDDQ
Crossing point
VSSQ
VTR
VCP
VID
VIX or VOX
< Differential signal levels >


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