H5PS1G43EFR
H5PS1G83EFR
H5PS1G63EFR
3.2.4 Differential Input AC logic Level
Symbol
Parameter
Min.
Max.
Units Notes
VID (ac)
0.5
VDDQ + 0.6
V
V
1
2
ac differential input voltage
ac differential cross point voltage
VIX (ac)
0.5 * VDDQ - 0.175 0.5 * VDDQ + 0.175
Note:
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).
V
DDQ
V
TR
Crossing point
V
ID
V
V
IX or OX
V
CP
V
SSQ
< Differential signal levels >
Note:
1. VID(AC) specifies the input differential voltage |VTR -VCP | required for switching, where VTR is the true input sig-
nal
(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.
3.2.5 Differential AC output parameters
Symbol
Parameter
Min.
Max.
Units Notes
VOX (ac)
0.5 * VDDQ - 0.125 0.5 * VDDQ + 0.125
V
1
ac differential cross point voltage
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 w hich differential output signals must
cross.
Rev. 0.4 / Nov 2008
13
HYNIX [ HYNIX SEMICONDUCTOR ]
