MT46H8M32LFB5-6 IT:H Micron Technology Inc, MT46H8M32LFB5-6 IT:H Datasheet - Page 36

• Manufacturer Part Number: MT46H8M32LFB5-6 IT:H
• Description: DRAM Chip DDR SDRAM 256M-Bit 8Mx32 1.8V 90-Pin VFBGA Tray
• Manufacturer: Micron Technology Inc
• Type: DDR SDRAMr

Specifications of MT46H8M32LFB5-6 IT:H

• Density: 256 Mb
• Maximum Clock Rate: 166 MHz
• Package: 90VFBGA
• Address Bus Width: 14 Bit
• Operating Supply Voltage: 1.8 V
• Maximum Random Access Time: 6.5|5 ns
• Operating Temperature: -40 to 85 °C
• Organization: 8Mx32
• Address Bus: 14b
• Access Time (max): 6.5/5ns
• Operating Supply Voltage (typ): 1.8V
• Package Type: VFBGA
• Operating Temp Range: -40C to 85C
• Operating Supply Voltage (max): 1.95V
• Operating Supply Voltage (min): 1.7V
• Supply Current: 120mA
• Pin Count: 90
• Mounting: Surface Mount
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Compliant

Figure 10: READ Command
WRITE
PDF: 09005aef834bf85b
256mb_mobile_ddr_sdram_t36n.pdf - Rev. H 11/09 EN
Note:
BA0, BA1
The WRITE command is used to initiate a burst write access to an active row. The val-
ues on the BA0 and BA1 inputs select the bank; the address provided on inputs A[I:0]
(where I = the most significant column address bit for each configuration) selects the
starting column location. The value on input A10 determines whether auto precharge is
used. If auto precharge is selected, the row being accessed will be precharged at the end
of the WRITE burst; if auto precharge is not selected, the row will remain open for subse-
quent accesses. Input data appearing on the DQ is written to the memory array, subject
to the DM input logic level appearing coincident with the data. If a given DM signal is
registered LOW, the corresponding data will be written to memory; if the DM signal is
registered HIGH, the corresponding data inputs will be ignored, and a WRITE will not
be executed to that byte/column location.
If a WRITE or a READ is in progress, the entire data burst must be complete prior to
stopping the clock (see Clock Change Frequency (page 93)). A burst completion for
WRITEs is defined when the write postamble and
Address
1. EN AP = enable auto precharge; DIS AP = disable auto precharge.
CAS#
RAS#
WE#
A10
CK#
CKE
CS#
CK
HIGH
Column
EN AP
DIS AP
Bank
Don’t Care
36
256Mb: x16, x32 Mobile LPDDR SDRAM
Micron Technology, Inc. reserves the right to change products or specifications without notice.
t
WR or
t
WTR are satisfied.
©2008 Micron Technology, Inc. All rights reserved.
Commands