EM6A9160
EtronTech
Table 17. Recommended A.C. Operating Conditions
(VDD = 2.5V±0.2V, TA = 0~70 °C)
Symbol
VIH (AC)
VIL (AC)
VID (AC)
Parameter
Input High Voltage (AC)
Min.
Max.
Unit
V
VREF + 0.31
-
Input Low Voltage (AC)
-
VREF – 0.31
V
0.7
V
DDQ + 0.6
V
CK
Input Different Voltage, CK and
inputs
CK
VIX (AC)
0.5 * VDDQ-0.2
0.5 * VDDQ+0.2
V
Input Crossing Point Voltage, CK and
inputs
Note:
1. All voltages are referenced to VSS.
2. These parameters depend on the cycle rate and these values are measured by the cycle rate under the
minimum value of tCK and tRC. Input signals are changed one time during tCK
3. Power-up sequence is described in Note 5.
4. A.C. Test Conditions
.
Table 18. SSTL _2 Interface
Reference Level of Output Signals (VREF
)
0.5 * VDDQ
Reference to the Test Load
VREF+0.31 V / VREF-0.31V
1 V/ns
Output Load
Input Signal Levels(VIH / VIL)
Input Signals Slew Rate
Reference Level of Input Signals
0.5 * VDDQ
Figure 4. SSTL_2 A.C. Test Load
0.5 * VDDQ
50Ω
DQ, DQS
Z0=50Ω
30pF
13
Rev. 1.3
Apr. /2014
ETRON [ ETRON TECHNOLOGY, INC. ]
