Datasheet

Single-Ended AC and DC Input Levels for DQ and DM
NOTE :
1. For DQ and DM : V
REF = VREFDQ (DC).
2. See Overshoot and Undershoot Specifications section.
3. The AC peak noise on V
REF may not allow VREF to deviate from VREFDQ (DC) by more than ±1% VDD
(for reference: approx. ±15 mV).
4. For reference: approx. VDD/2 ±15 mV.
Symbol Parameter Min. Max. Units
Notes
V
IHDQ (DC100) DC input logic high VREF + 0.100 VDD V 1
VILDQ (DC100) DC input logic low VSS VREF - 0.100 V 1
VIHDQ (AC175) V1,2
AC input logic high
- -
V
ILDQ (AC175)
V1,2
AC input logic low
- -
V
IHDQ (AC150) AC input logic high
V
REF + 0.150 -
V1,2
V
ILDQ (AC150)
AC input logic low
- V
REF - 0.150
V1,2
V
IHDQ (AC135)
AC input logic high
- -
V1,2
V
ILDQ (AC135)
AC input logic low
- -
V1,2
V
REFDQ (DC) Reference voltage for
DQ, DM inputs
0.49 * VDD 0.51 * VDD V 3,4
Confidential
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Rev.1.1 April 2017
AS4C256M16D3B-12BIN
AS4C256M16D3B-12BCN