1Gb: x4, x8, x16 DDR3 SDRAM
Output Driver Impedance
Table 41: 34 Ohm Driver IOH/IOL Characteristics: VDD = VDDQ = 1.425V
MR1[5,1]
RON
Resistor
VOUT
Max
14.0
23.3
37.3
37.3
23.3
14.0
Nom
8.3
Min
7.5
Unit
mA
mA
mA
mA
mA
mA
0, 1
ꢇꢆꢁꢇΩ
RON34(PD)
IOL @ 0.2 × VDDQ
IOL @ 0.5 × VDDQ
IOL @ 0.8 × VDDQ
IOH @ 0.2 × VDDQ
IOH @ 0.5 × VDDQ
IOH @ 0.8 × VDDQ
20.8
33.3
33.3
20.8
8.3
18.7
23.5
23.5
18.7
7.5
RON34(PU)
34 Ohm Output Driver Sensitivity
If either the temperature or the voltage changes after ZQ calibration, then the tolerance
limits listed in Table 30 (page 64) can be expected to widen according to Table 42 and
Table 43 (page 66).
Table 42: 34 Ohm Output Driver Sensitivity Definition
Symbol
Min
Max
Unit
RON(PD) @ 0.2 × VDDQ 0.6 - dRONdTL × |ΔT| - dRONdVL × |ΔV|
RON(PD) @ 0.5 × VDDQ 0.9 - dRONdTM × |ΔT| - dRONdVM × |ΔV|
RON(PD) @ 0.8 × VDDQ 0.9 - dRONdTH × |ΔT| - dRONdVH × |ΔV|
RON(PU) @ 0.2 × VDDQ 0.9 - dRONdTL × |ΔT| - dRONdVL × |ΔV|
RON(PU) @ 0.5 × VDDQ 0.9 - dRONdTM × |ΔT| - dRONdVM × |ΔV|
RON(PU) @ 0.8 × VDDQ 0.6 - dRONdTH × |ΔT| - dRONdVH × |ΔV|
1.1 + dRONdTL × |ΔT| + dRONdVL × |ΔV|
1.1 + dRONdTM × |ΔT| + dRONdVM × |ΔV|
1.4 + dRONdTH × |ΔT| + dRONdVH × |ΔV|
1.4 + dRONdTL × |ΔT| + dRONdVL × |ΔV|
1.1 + dRONdTM × |ΔT| + dRONdVM × |ΔV|
1.1 + dRONdTH × |ΔT| + dRONdVH × |ΔV|
RZQ/7
RZQ/7
RZQ/7
RZQ/7
RZQ/7
RZQ/7
1. ΔT = T - T(@CALIBRATION)ꢊꢋΔV = VDDQ - VDDQ(@CALIBRATION); and VDD = VDDQ
.
Note:
Table 43: 34 Ohm Output Driver Voltage and Temperature Sensitivity
Change
dRONdTM
dRONdVM
dRONdTL
dRONdVL
dRONdTH
dRONdVH
Min
Max
1.5
Unit
%/°C
0
0
0
0
0
0
0.13
1.5
%/mV
%/°C
0.13
1.5
%/mV
%/°C
0.13
%/mV
PDF: 09005aef826aa906
1Gb_DDR3_SDRAM.pdf - Rev. L 03/13 EN
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