AS4C64M32MD2-25BCN datasheet(84/129 Pages) ALSC

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Table 28 — Single-ended levels for CK, DQS, CK#, DQS#

Symbol

Parameter

LPDDR2-800

Unit

Notes

Min

Max

VSEH(AC)

Single-ended

high-level for strobes

(VDDQ/2) +0.220

Note 3

1,2

Single-ended

high-level for CK, CK#

(VDDCA/2) +0.220

Note 3

1,2

VSEL(AC)

Single-ended

low-level for strobes

Note 3

(VDDQ/2) - 0.220

1,2

Single-ended

low-level for CK, CK#

Note 3

(VDDCA/2) - 0.220

1,2

NOTE 1 For CK, CK# use VSEH/VSEL(AC) of CA; for strobes (DQS0, DQS0#, DQS1, DQS1#, DQS2, DQS2#, DQS3, DQS3#) use

VIH/VIL(AC) of DQs.

NOTE 2 VIH(AC)/VIL(AC) for DQs is based on VREFDQ; VSEH(AC)/VSEL(AC) for CA is based on VREFCA; if a reduced ac-high or ac-

low level is used for a signal group, then the reduced level applies also here

NOTE 3 These values are not defined, however the single-ended signals CK, CK#, DQS0, DQS0#, DQS1, DQS1#, DQS2, DQS2#, DQS3,

DQS3# need to be within the respective limits (VIH(DC) max, VIL(DC)min) for single-ended signals as well as the limitations for overshoot and

undershoot.

Refer to Overshoot and Undershoot Specifications”

AS4C64M32MD2-25BCN

AS4C128M16MD2-25BCN

Confidential

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Rev.1.0 July 2016

AS4C64M32MD2-25BCN Datasheet(PDF) 84 Page - Alliance Semiconductor Corporation

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