EtronTech
EM68C08CWAG
Table 18. Input logic level
-18
-25/3
Unit
Symbol
Parameter
Min.
Max.
Min.
Max.
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 VDDQ + 0.3 VREF + 0.125 VDDQ + 0.3
V
V
V
V
V
-0.3
VREF - 0.125
-
-0.3
VREF - 0.125
VREF + 0.2
VREF + 0.2 VDDQ + Vpeak
-
VREF - 0.2
VDDQ + 0.6
VssQ - Vpeak
0.5
VREF - 0.2
VDDQ
0.5
0.5 x VDDQ
- 0.175
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
NOTE1: VID(AC) specifies the input differential voltage |VTR -VCP| required for switching, where VTR is the true
input signal (such as CK, DQS, LDQS or UDQS) and VCP is the complementary input signal (such as CK,
DQS, LDQS or UDQS). The minimum value is equal to VIH (ac) - VIL (ac).
NOTE2: The typical value of VIX (ac) is expected to be about 0.5 x VDDQ of the transmitting device and VIX (ac) is
expected to track variations in VDDQ. VIX (ac) indicates the voltage at which differential input signals must
cross.
NOTE3: 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
0.5 x VDDQ - 0.125 0.5 x VDDQ + 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. 1.1
24
Apr. /2016
ETRON [ ETRON TECHNOLOGY, INC. ]
