Datasheet

DDR3L 34 Ohm Driver
Using Table 36, the 34Ω driver’s current range has been calculated and summarized in
Table 37 (page 58) V
DD
= 1.35V, Table 38 for V
DD
= 1.45V, and Table 39 (page 59) for
V
DD
= 1.283V. The individual pull-up and pull-down resistors R
ON34(PD)
and R
ON34(PU)
are defined as follows:
• R
ON34(PD)
= (V
OUT
)/|I
OUT
|; R
ON34(PU)
is turned off
• R
ON34(PU)
= (V
DDQ
- V
OUT
)/|I
OUT
|; R
ON34(PD)
is turned off
Table 36: DDR3L 34 Ohm Driver Pull-Up and Pull-Down Impedance Calculations
R
ON
Min Nom Max Unit
RZQ = 240Ω  237.6 240 242.4 Ω
RZQ/7 = (240Ω  33.9 34.3 34.6 Ω
MR1[5,1] R
ON
Resistor V
OUT
Min Nom Max Unit
0, 1 Ω R
ON34(PD)
0.2 × V
DDQ
20.4 34.3 38.1 Ω
0.5 × V
DDQ
30.5 34.3 38.1 Ω
0.8 × V
DDQ
30.5 34.3 48.5 Ω
R
ON34(PU)
0.2 × V
DDQ
30.5 34.3 48.5 Ω
0.5 × V
DDQ
30.5 34.3 38.1 Ω
0.8 × V
DDQ
20.4 34.3 38.1 Ω
Table 37: DDR3L 34 Ohm Driver I
OH
/I
OL
Characteristics: V
DD
= V
DDQ
= DDR3L@1.35V
MR1[5,1] R
ON
Resistor V
OUT
Max Nom Min Unit
0, 1 Ω R
ON34(PD)
I
OL
@ 0.2 × V
DDQ
13.3 7.9 7.1 mA
I
OL
@ 0.5 × V
DDQ
22.1 19.7 17.7 mA
I
OL
@ 0.8 × V
DDQ
35.4 31.5 22.3 mA
R
ON34(PU)
I
OH
@ 0.2 × V
DDQ
35.4 31.5 22.3 mA
I
OH
@ 0.5 × V
DDQ
22.1 19.7 17.7 mA
I
OH
@ 0.8 × V
DDQ
13.3 7.9 7.1 mA
Table 38: DDR3L 34 Ohm Driver I
OH
/I
OL
Characteristics: V
DD
= V
DDQ
= DDR3L@1.45V
MR1[5,1] R
ON
Resistor V
OUT
Max Nom Min Unit
0, 1 Ω R
ON34(PD)
I
OL
@ 0.2 × V
DDQ
14.2 8.5 7.6 mA
I
OL
@ 0.5 × V
DDQ
23.7 21.1 19.0 mA
I
OL
@ 0.8 × V
DDQ
38.0 33.8 23.9 mA
R
ON34(PU)
I
OH
@ 0.2 × V
DDQ
38.0 33.8 23.9 mA
I
OH
@ 0.5 × V
DDQ
23.7 21.1 19.0 mA
I
OH
@ 0.8 × V
DDQ
14.2 8.5 7.6 mA
8Gb: x4, x8, x16 DDR3L SDRAM
Output Driver Impedance
58
Rev 2.0 June 2016
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