W3EG6433S-D3 Datasheet, PDF (4/12 Pages) White Electronic Designs Corporation – 256MB - 2x16Mx64 DDR SDRAM UNBUFFERED

White Electronic Designs
ABSOLUTE MAXIMUM RATINGS
Parameter
Voltage on any pin relative to VSS
Voltage on VCC supply relative to VSS
Storage Temperature
Power Dissipation
Short Circuit Current
Symbol
VIN, VOUT
VCC, VCCQ
TSTG
PD
IOS
Note: Permanent device damage may occur if ‘ABSOLUTE MAXIMUM RATINGS’ are exceeded.
Functional operation should be restricted to recommended operating condition.
Exposure to higher than recommended voltage for extended periods of time could affect device reliability
W3EG6433S-D3
-JD3
PRELIMINARY
Value
-0.5 to 3.6
-1.0 to 3.6
-55 to +150
24
50
Units
V
V
°C
W
mA
DC OPERATING CONDITIONS
Recommended perating conditions (Voltage referenced to VSS=0V, TA=0 to 70°C)
Parameter
Symbol
Min
Max
Unit
Note
Supply Voltage (for device with a nominal VCC of 2.5V)
I/O Supply Voltage
I/O Reference Voltage
I/OTermination Voltage
Input Logic High Voltage
Input Logic Low Voltage
Input Voltage Level, CK and CK# Inputs
Input Differential Voltage, CK and CK# Inputs
V-I Matching: Pullup to Pulldown Current Ratio
VCC
VCCQ
VREF
VTT
VIH
VIL
VIN(DC)
VID(DC)
VI(Ratio)
2.3
2.3
0.49*VCCQ
VREF-0.04
VREF + 0.15
-0.3
-0.3
0.36
0.71
2.7
2.7
0.51*VCCQ
VREF+0.04
VCCQ + 0.3
VREF -0.15
VCCQ + 0.3
VCCQ + 0.6
1.4
V
V
V
1
V
2
V
V
V
V
3
-
4
Input leakage current
II
-2
2
uA
Output leakage current
IOZ
-5
5
uA
Output High Current(Normal strengh driver); VOUT = VTT = 0.84V
IOH
-16.8
uA
Output High Current(Normal strengh driver); VOUT = VTT = 0.84V
IOL
16.8
uA
Output High Current(Half strengh driver); VOUT = VTT = 0.45V
VOH
-9
uA
Output High Current(Half strengh driver); VOUT = VTT = 0.45V
VOL
9
uA
NOTES:
1. VREF is expected to be equal to 0.5*VCCQ of the transmitting device, and to track variations in the dc level of same. Peak-to peak noise on VREF may not exceed +/-2% of the dc
value.
2. VTT 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.
3. VID is the magnitude of the difference between the input level on CK and the input level on CK#.
4. The ratio of the pullup current to the pulldown current is specified for the same temperature and voltage, over the entire temperature and voltage range, for device drain to source
voltages from 0.25V to 1.0V. For a given output, it represents the maximum difference between pullup and pulldown drivers due to process variation. The full variation in the ratio
of the maximum to minimum pullup and pulldown current will not exceed 1/7 for device drain to source voltages from 0.1 to 1.0.
November 2005
Rev. 2
4
White Electronic Designs Corporation • [phone] • www.wedc.com