MT41J256M8HX-125:D Micron Technology Inc, MT41J256M8HX-125:D Datasheet - Page 57

• Manufacturer Part Number: MT41J256M8HX-125:D
• Description: MICMT41J256M8HX-125:D 2GB DDR3 SDRAM
• Manufacturer: Micron Technology Inc
• Type: DDR3 SDRAMr
• Series: -r

Specifications of MT41J256M8HX-125:D

• Organization: 256Mx8
• Address Bus: 18b
• Maximum Clock Rate: 1.066GHz
• Operating Supply Voltage (typ): 1.5V
• Package Type: FBGA
• Operating Temp Range: 0C to 95C
• Operating Supply Voltage (max): 1.575V
• Operating Supply Voltage (min): 1.425V
• Supply Current: 185mA
• Pin Count: 78
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Format - Memory: RAM
• Memory Type: DDR3 SDRAM
• Memory Size: 2G (256M x 8)
• Speed: 800MHz
• Interface: Parallel
• Voltage - Supply: 1.425 V ~ 1.575 V
• Operating Temperature: 0°C ~ 95°C
• Package / Case: 78-TFBGA
• Lead Free Status / Rohs Status: Compliant

Output Driver Impedance
Figure 26:
34 Ohm Output Driver Impedance
PDF: 09005aef826aaadc/Source: 09005aef82a357c3
DDR3_D3.fm - Rev G 2/09 EN
Output Driver
The output driver impedance is selected by MR1[5,1] during initialization. The selected
value is able to maintain the tight tolerances specified if proper ZQ calibration is
performed. Output specifications refer to the default output driver unless specifically
stated otherwise. A functional representation of the output buffer is shown in Figure 26
on page 57. The output driver impedance R
reference resistor RZQ as follows:
• R
The individual pull-up and pull-down resistors (R
follows:
• R
• R
The 34Ω driver (MR1[5, 1] = 01) is the default driver. Unless otherwise stated, all timings
and specifications listed herein apply to the 34Ω driver only. Its impedance R
defined by the value of the external reference resistor RZQ as follows: R
(with nominal RZQ = 240Ω
impedance characteristics are listed in Table 38 on page 58.
To
other
circuitry
such as
RCV, . . .
ON x
ON PU
ON PD
= RZQ/y (with RZQ = 240Ω
= (V
= (V
Chip in drive mode
Output driver
OUT
DD
R
R
ON PU
ON PD
Q - V
I
)/|I
I
PU
PD
OUT
OUT
|, when R
)/|I
±
OUT
1%) and is actually 34.3Ω
57
|, when R
ON PU
±
1%; x = 34Ω or 40Ω with y = 7 or 6, respectively)
I
OUT
Micron Technology, Inc., reserves the right to change products or specifications without notice.
is turned off
ON PD
ON
V
DQ
V
V
is defined by the value of the external
is turned off
DD
OUT
SS
Q
Q
2Gb: x4, x8, x16 DDR3 SDRAM
ON PU
±
Output Driver Impedance
1%. The 34Ω output driver
and R
ON PD
©2006 Micron Technology, Inc. All rights reserved.
) are defined as
ON 34
= RZQ/7
ON
is