HYMP112S64(L)MP8

Rev. 0.1/ July 2004

8

Differential Input AC logic Level

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).

Notes:

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

VIH(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 whitch differential input signals must cross.

Differential AC output parameters

Notes:

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.

Symbol

Parameter

Min.

Max.

Units

Notes

ac differential input voltage

0.5

VDDQ + 0.6

V

1

ac differential cross point voltage

0.5 * VDDQ - 0.175

0.5 * VDDQ + 0.175

V

2

Symbol

Parameter

Min.

Max.

Units

Notes

ac differential cross point voltage

0.5 * VDDQ - 0.125

0.5 * VDDQ + 0.125

V

1

Crossing point

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