HMT351U6AFR8C-G7 Datasheet, PDF (17/47 Pages) Hynix Semiconductor – 240pin DDR3 SDRAM Unbuffered DIMMs

HMT351U6AFR8C
HMT351U7AFR8C
6. AC & DC Operating Conditions
6.1 Recommended DC Operating Conditions
Symbol
VDD
VDDQ
Parameter
Supply Voltage
Supply Voltage for Output
Min.
1.425
1.425
Rating
Typ.
1.500
1.500
Max.
1.575
1.575
1. Under all conditions, VDDQ must be less than or equal to VDD.
2. VDDQ tracks with VDD. AC parameters are measured with VDD abd VDDQ tied together.
Units Notes
V
1,2
V
1,2
6.2 DC & AC Logic Input Levels
6.2.1 DC & AC Logic Input Levels for Single-Ended Signals
Symbol
Parameter
DDR3-1066, DDR3-1333
Min
Max
Unit Notes
VIH(DC)
DC input logic high
Vref + 0.100
-
V
1, 2
VIL(DC)
DC input logic low
Vref - 0.100
V
1, 2
VIH(AC)
AC input logic high
Vref + 0.175
-
V
1, 2
VIL(AC)
AC input logic low
Vref - 0.175
V
1, 2
VRefDQ(DC)
Reference Voltage for
DQ, DM inputs
0.49 * VDD
0.51 * VDD
V
3, 4
VRefCA(DC)
Reference Voltage for
ADD, CMD inputs
0.49 * VDD
0.51 * VDD
V
3, 4
VTT
Termination voltage for
DQ, DQS outputs
VDDQ/2 - TBD
VDDQ/2 + TBD
V
1. For DQ and DM, Vref = VrefDQ. For input ony pins except RESET#, Vref = VrefCA.
2. The “t.b.d.” entries might change based on overshoot and undershoot specification.
3. The ac peak noise on VRef may not allow VRef to deviate from VRef(DC) by more than +/-1% VDD
(for reference: approx. +/- 15 mV).
For reference: approx. VDD/2 +/- 15 mV.
The dc-tolerance limits and ac-noise limits for the reference voltages VRefCA and VRefDQ are illustrated in figure
6.2.1. It shows a valid reference voltage VRef(t) as a function of time. (VRef stands for VRefCA and VRefDQ like-
wise).VRef(DC) is the linear average of VRef(t) over a very long period of time (e.g. 1 sec). This average has to meet
the min/max requirements in Table 1. Furthermore VRef(t) may temporarily deviate from VRef(DC) by no more than
+/- 1% VDD.
Rev. 0.02 / Apr 2009
17