Datasheet

Table 22. AC overshoot/undershoot specification for clock, data, strobe, and mask pins
(DQ, UDQS, LDQS, UDQS#, LDQS#, DM, CK, CK#)
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
0.19 0.23 0.23 V-ns
Maximum undershoot area below V
SS
0.19 0.23 0.23 V-ns
Table 23. Output AC test conditions
Symbol Parameter Value Unit Note
V
OTR
Output timing measurement reference level 0.5xV
DDQ
V 1
NOTE1: The V
DDQ
of the device under test is referenced.
Table 24. Output DC current drive
Symbol Parameter Value Unit Note
I
OH
(dc) Output minimum source DC current -13.4 mA
1, 3, 4
I
OL
(dc) Output minimum sink DC current 13.4 mA
2, 3, 4
NOTE1: V
DDQ
= 1.7 V; V
OUT
= 1420 mV. (V
OUT
- V
DDQ
) /I
OH
must be less than 21  for values of V
OUT
between V
DDQ
and V
DDQ
- 280 mV.
NOTE2: V
DDQ
= 1.7 V; V
OUT
= 280 mV. V
OUT
/I
OL
must be less than 21  for values of V
OUT
between 0 V and 280 mV.
NOTE3: The dc value of V
REF
applied to the receiving device is set to V
TT
NOTE4: The values of I
OH
(dc) and I
OL
(dc) are based on the conditions given in Notes 1 and 2. They are used to
test device drive current capability to ensure V
IH
min plus a noise margin and VIL max minus a noise
margin are delivered to an SSTL_18 receiver. The actual current values are derived by shifting the desired
driver operating point (see JEDEC standard: Section 3.3 of JESD8-15A) along a 21  load line to define a
convenient driver current for measurement.
Table 25. Capacitance
(V
DD
= 1.8V, f = 1MHz, T
OPER
= 25 °C)
Symbol Parameter
Values
Unit
Min. Max.
C
IN
Input Capacitance : Command and Address 1.0 1.75 pF
C
CK
Input Capacitance (CK, CK#) 1.0 2.0 pF
C
I/O
DM, DQ, DQS Input/Output Capacitance 2.5 3.5 pF
DC
IN
Delta Input Capacitance: Command and Address - 0.25 pF
DC
CK
Delta Input Capacitance: CK, CK# - 0.25 pF
DC
IO
Delta Input/Output Capacitance: DM, DQ, DQS - 0.5 pF
NOTE: These parameters are periodically sampled and are not 100% tested.
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
24
Jun./2014