k4b2g0446e Samsung Semiconductor, Inc., k4b2g0446e Datasheet - Page 21

• Manufacturer Part Number: k4b2g0446e
• Description: Ddp 2gb E-die Ddr3 Sdram
• Manufacturer: Samsung Semiconductor, Inc.

K4B2G0446E
K4B2G0846E
9.7 34 ohm Output Driver DC Electrical Characteristics
A functional representation of the output buffer is shown below. Output driver impedance RON is defined by the value of external reference resistor RZQ
as follows:
RON
RON
The individual Pull-up and Pull-down resistors (RONpu and RONpd) are defined as follows
[ Table 22 ] Output Driver DC Electrical Characteristics, assuming RZQ=240 ohms ;
Note :
1. The tolerance limits are specified after calibration with stable voltage and temperature. For the behavior of the tolerance limits if temperature or voltage changes after calibra-
2. The tolerance limits are specified under the condition that V
3. Pull-down and pull-up output driver impedance are recommended to be calibrated at 0.5 X V
4. Measurement definition for mismatch between pull-up and pull-down, MMpupd: Measure RONpu and RONpd. both at 0.5 X V
RONpu =
RONpd =
tion, see following section on voltage and temperature sensitivity
above, e.g. calibration at 0.2 X V
Mismatch between Pull-up and Pull-down,
MMpupd =
34
40
RONnom
= RZQ/7 (Nominal 34ohms +/- 10% with nominal RZQ=240ohm)
= RZQ/6 (Nominal 40ohms +/- 10% with nominal RZQ=240ohm)
34Ohms
40Ohms
entire operating temperature range; after proper ZQ calibration
RONpu - RONpd
RONnom
MMpupd
V
DDQ
l Iout l
l Iout l
V
OUT
-V
OUT
DDQ
RON34pd
RON34pu
RON40pd
RON40pu
x 100
Resistor
and 0.8 X V
Figure 11. Output Driver : Definition of Voltages and Currents
under the condition that RONpd is turned off
under the condition that RONpu is turned off
DDQ
Output Driver : Definition of Voltages and Currents
circuity
other
To
V
V
V
V
V
V
V
V
V
V
V
V
V
OMdc
OHdc
OMdc
OHdc
OMdc
OHdc
OMdc
OHdc
OMdc
OLdc
OLdc
OLdc
OLdc
DDQ
= V
= 0.2 x V
= 0.2 x V
= 0.2 x V
= 0.2 x V
= 0.5 x V
= 0.8 x V
= 0.5 x V
= 0.8 x V
= 0.5 x V
= 0.8 x V
= 0.5 x V
= 0.8 x V
= 0.5 x V
Vout
DD
Output Driver
and that V
RON
RON
Ipd
Ipu
Page 21 of 59
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
Pu
Pd
SSQ
= V
Min
0.6
0.9
0.9
0.9
0.9
0.6
0.6
0.9
0.9
0.9
0.9
0.6
-10
SS
DDQ
. Other calibration schemes may be used to achieve the linearity spec shown
Nom
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Iout
V
DQ
V
DDP 2Gb DDR3 SDRAM
DDQ
SSQ
Max
Vout
1.1
1.1
1.4
1.4
1.1
1.1
1.1
1.1
1.4
1.4
1.1
1.1
10
DDQ
:
Rev. 1.0 March 2009
RZQ/7
RZQ/6
Units
%
Notes
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
1,2,4