Datasheet

Table 18. Input logic level
Symbol Parameter
-18I -25I/3I
Unit
Min. Max. Min. Max.
VIH (DC) DC Input logic High Voltage V
REF
+ 0.125 V
DDQ
+ 0.3 V
REF
+ 0.125 V
DDQ
+ 0.3 V
VIL (DC) DC Input Low Voltage - 0.3 V
REF
- 0.125 - 0.3 V
REF
- 0.125 V
VIH (AC) AC Input High Voltage V
REF
+ 0.2 - V
REF
+ 0.2 V
DDQ
+ V
p
eak
V
VIL (AC) AC Input Low Voltage - V
REF
- 0.2 V
SSQ
- V
p
eak
V
REF
- 0.2 V
VID (AC) AC Differential Voltage 0.5 V
DDQ
+ 0.6 0.5 V
DDQ
V
VIX (AC)
A
C Differential crosspoint
Voltage
0.5 x V
DDQ
-
0.175
0.5 x V
DDQ
+
0.175
0.5 x V
DDQ
-
0.175
0.5 x V
DDQ
+
0.175
V
NOTE1: Refer to Overshoot/undershoot specification for V
peak
value: maximum peak amplitude allowed for
overshoot and undershoot.
Table 19. AC Input test conditions
Symbol Parameter Values Unit Note
V
REF
Input reference voltage 0.5 x V
DDQ
V 1
V
SWING(max)
Input signal maximum peak to peak swing 1.0 V 1
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 V
IH
/
IL
(ac) level applied to the
device under test.
NOTE2: The input signal minimum slew rate is to be maintained over the range from V
REF
to V
IH
(ac) min for rising
edges and the range from V
REF
to V
IL
(ac) max for falling edges .
NOTE3: AC timings are referenced with input waveforms switching from V
IL
(ac) to V
IH
(ac) on the positive
transitions and V
IH
(ac) to V
IL
(ac) on the negative transitions.
Table 20. Differential AC output parameters
Symbol Parameter
Value
Unit
Note
Min. Max.
V
ox
(AC) AC Differential Cross Point Voltage 0.5 x V
DDQ
- 0.125 0.5 x V
DDQ
+ 0.125 V 1
NOTE1: The typical value of V
OX
(ac) is expected to be about 0.5 x V
DDQ
of the transmitting device and V
OX
(ac) is
expected to track variations in V
DDQ
. V
OX
(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-BA1, CS#, RAS#, CAS#, WE#, CKE, ODT)
Parameter
-18I -25I
-3I
Unit
Maximum peak amplitude allowed for overshoot area
0.5 0.5
0.5 V
Maximum peak amplitude allowed for undershoot area
0.5 0.5
0.5 V
Maximum overshoot area above V
DD
0.5 0.66
0.8 V-ns
Maximum undershoot area below V
SS
0.5 0.66
0.8 V-ns
AS4C32M16D2A-25BIN
Alliance Memory Inc.
511 Taylor Way, San Carlos, CA 94070 TEL: [phone] FAX: [phone]
Alliance Memory Inc. reserves the right to change products or specification without notice
Rev.1.2
23
Jun./2014