MT44K16M36 MICRON [Micron Technology], MT44K16M36 Datasheet - Page 33

• Manufacturer Part Number: MT44K16M36
• Description: 576Mb: x18, x36 RLDRAM 3
• Manufacturer: MICRON [Micron Technology]

Output Driver Impedance
Figure 15: Output Driver
PDF: 09005aef84003617
576mb_rldram3.pdf – Rev. B 1/12 EN
The output driver impedance is selected by MR1[1:0] during initialization. The selected
value is able to maintain the tight tolerances specified if proper ZQ calibration is per-
formed.
Output specifications refer to the default output driver unless specifically stated other-
wise. A functional representation of the output buffer is shown below. The output driver
impedance R
• R
The individual pull-up and pull-down resistors (R
lows:
• R
• R
To
other
circuitry
such as
RCV, . . .
ON,x
ON(PU)
ON(PD)
= RZQ/y (with RZQ = 240Ω ±1%; x = 40Ω or 60Ω with y = 6 or 4, respectively)
Chip in drive mode
= (V
= (V
Output Driver
ON
DDQ
OUT
R
R
is defined by the value of the external reference resistor RZQ as follows:
ON(PU)
ON(PD)
I
I
PU
PD
)/|I
- V
OUT
OUT
|, when R
)/|I
OUT
33
|, when R
ON(PU)
Micron Technology, Inc. reserves the right to change products or specifications without notice.
I
is turned off
OUT
ON(PD)
V
V
V
DQ
is turned off
DDQ
SSQ
OUT
ON(PU)
576Mb: x18, x36 RLDRAM 3
Output Driver Impedance
and R
ON(PD)
© 2011 Micron Technology, Inc. All rights reserved.
) are defined as fol-