IBMN612404GT3B
IBMN612804GT3B
Preliminary
128Mb Double Data Rate Synchronous DRAM
DC Electrical Characteristics and Operating Conditions
(0˚C ≤ TA ≤ 70°C; VDDQ = 2.5V ± 0.2V, VDD = + 2.5V ± 0.2V, see AC Characteristics)
Symbol
Parameter
Min
Max
Units
mA
Notes
1
I
Output Current: Weak Strength Driver
− 9.0
OHW
High current (V
Low current (V
= V
-0.763V, min V
, min V )
REF TT
OUT
DDQ
I
9.0
= 0.763V, max V
, max V )
OLW
OUT
REF
TT
1. Inputs are not recognized as valid until V
stabilizes.
REF
2. V
is expected to be equal to 0.5 V
of the transmitting device, and to track variations in the DC level of the same. Peak-to-
REF
DDQ
peak noise on V
may not exceed 2% of the DC value.
REF
3. V is not applied directly to the device. V is a system supply for signal termination resistors, is expected to be set equal to V ,
REF
TT
TT
and must track variations in the DC level of V
.
REF
4. V is the magnitude of the difference between the input level on CK and the input level on CK.
ID
5. The ratio of the pullup current to the pulldown current is specified for the same temperature and voltage, over the entire tempera-
ture and voltage range, for device drain to source voltages for 0.25 volts to 1.0 volts. For a given output, it represents the maximum
difference between pullup and pulldown drivers due to process variation.
Normal Strength Driver Pulldown and Pullup Characteristics
1. The full variation in driver pulldown current from minimum to maximum process, temperature and voltage
will lie within the outer bounding lines of the V-I curve.
2. It is recommended that the “typical” IBIS pulldown V-I curve lie within the shaded region of the V-I curve.
Normal Strength Driver Pulldown Characteristics
140
Maximum
Typical High
Typical Low
Minimum
0
0
2.7
V
(V)
OUT
3. The full variation in driver pullup current from minimum to maximum process, temperature and voltage
will lie within the outer bounding lines of the V-I curve.
4. It is recommended that the “typical” IBIS pullup V-I curve lie within the shaded region of the V-I curve.
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
06K0566.F39350B
1/01
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