W3H64M72E-XSBX
White Electronic Designs
ADVANCED*
DC OPERATING CONDITIONS
All voltages referenced to VSS
Parameter
Symbol
VCC
VCCQ
VREF
VTT
Min
1 .7
1 .7
Typical
1 .8
1 .8
0.50 x VCCQ
VREF
Max
1 .9
1 .9
Unit
V
V
V
V
Notes
Supply voltage
I/O Supply voltage
I/O Reference voltage
I/O Termination voltage
Notes:
1
4
2
3
0.49 x VCCQ
VREF-0.04
0.51 x VCCQ
VREF + 0.04
1.
2.
V
CC VCCQ must track each other. VCCQ must be less than or equal to VCC
.
V
REF is expected to equal VCCQ/2 of the transmitting device and to track variations in the DC level of the same. Peak-to-peak noise on VREF may not exceed 1 percent of the DC
value. Peak-to-peak AC noise on VREF may not exceed 2 percent of VREF. This measurement is to be taken at the nearest VREF bypass capacitor.
3.
4.
V
TT is not applied directly to the device. VTT is a system supply for signal termination resistors, is expected to be set equal to VREF and must track variations in the DC level of VREF
.
V
CCQ tracks with VCC track with VCC
.
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VCCQ
VIN, VOUT
TSTG
Parameter
MIN
-1.0
-0.5
-0.5
-55
MAX
2.3
2.3
2.3
125
U nit
V
V
V
°C
Voltage on VCC pin relative to VSS
Voltage on VCCQ pin relative to VSS
Voltage on any pin relative to VSS
Storage temperature
Command/Address,
RAS#, CAS#, WE#,
CS#, CKE
CK, CK#
DM
-25
25
µA
Input leakage current; Any input 0V<VIN<VCC; VREF input
0V<VIN<0.95V; Other pins not under test = 0V
IL
-10
-5
10
5
µA
µA
Output leakage current;
IOZ
DQ, DQS, DQS#
-5
5
µA
µA
0V<VOUT<VCCQ; DQs and ODT are disable
IVREF
VREF leakage current; VREF = Valid VREF level
-10
10
INPUT/OUTPUT CAPACITANCE
TA = 25°C, f = 1MHz, VCC = VCCQ = 1.8V
Parameter
Symbol
Max
TBD
TBD
TBD
TBD
Unit
Input capacitance (A0 - A12, BA0 - BA2 ,CS#, RAS#,CAS#,WE#, CKE, ODT)
Input capacitance CK, CK#
CIN1
CIN2
CIN3
COUT
pF
pF
pF
pF
Input capacitance DM, DQS, DQS#
Input capacitance DQ0 - 71
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
March 2006
Rev. 1
22
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
