EtronTech
EM68C08CWAE
Table 18. Input logic level
-18
-25/3
Unit
Symbol
Parameter
Min.
Max.
VDDQ + 0.3
VREF - 0.125
-
Min.
VREF + 0.125
-0.3
Max.
VDDQ + 0.3
VREF - 0.125
VDDQ+Vpeak
VREF – 0.2
VDDQ
VIH (DC) DC Input logic High Voltage
VIL (DC) DC Input Low Voltage
VIH (AC) AC Input High Voltage
VIL (AC) AC Input Low Voltage
VID (AC) AC Differential Voltage
VREF + 0.125
V
V
V
V
V
-0.3
VREF + 0.2
VREF + 0.2
VssQ –Vpeak
0.5
-
VREF – 0.2
VDDQ+0.6
0.5 x
0.5
0.5 x VDDQ
0.175
-
0.5 x VDDQ
0.175
-
0.5 x
VDDQ+0.175
VIX (AC) AC Differential crosspoint Voltage
V
VDDQ+0.175
NOTE1: Refer to Overshoot/undershoot specification for Vpeak value: maximum peak amplitude allowed for overshoot
and undershoot.
Table 19. AC Input test conditions
Symbol
Parameter
Input reference voltage
Value
0.5 x VDDQ
1.0
Unit Note
VREF
V
V
1
1
VSWING(max) Input signal maximum peak to peak swing
Slew Rate Input signal minimum slew rate
1.0
V/ns 2, 3
NOTE1: Input waveform timing is referenced to the input signal crossing through the VIH /IL (ac) level applied to the
device under test.
NOTE2: The input signal minimum slew rate is to be maintained over the range from VREF to VIH(ac) min for rising
edges and the range from VREF to VIL (ac) max for falling edges .
NOTE3: AC timings are referenced with input waveforms switching from VIL (ac) to VIH (ac) on the positive transitions
and VIH (ac) to VIL (ac) on the negative transitions.
Table 20. Differential AC output parameters
Value
Symbol
Parameter
Unit Note
Min.
Max.
Vox(ac) AC Differential Cross Point Voltage
0.5xVDDQ-0.125
0.5xVDDQ+0.125
V
1
NOTE1: The typical value of VOX (ac) is expected to be about 0.5 x VDDQ of the transmitting device and VOX (ac) is
expected to track variations in VDDQ. VOX (ac) indicates the voltage at which differential output signals must
cross.
Table 21. AC overshoot/undershoot specification for address and control pins
(A0-A12, BA0-BA2, CS#, RAS#, CAS#, WE#, CKE, ODT)
Parameter
-18
0.5
0.5
0.5
0.5
-25
0.5
-3
Unit
V
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above VDD
0.5
0.5
0.8
0.8
0.5
V
0.66
0.66
V-ns
V-ns
Maximum undershoot area below VSS
Rev. 1.3
24
Oct. /2015
ETRON [ ETRON TECHNOLOGY, INC. ]
