MT46H8M32LFB5-6:A TR Micron Technology Inc, MT46H8M32LFB5-6:A TR Datasheet - Page 47

• Manufacturer Part Number: MT46H8M32LFB5-6:A TR
• Description: IC DDR SDRAM 256MBIT 90VFBGA
• Manufacturer: Micron Technology Inc
• Type: DDR SDRAMr

Specifications of MT46H8M32LFB5-6:A TR

• Format - Memory: RAM
• Memory Type: Mobile DDR SDRAM
• Memory Size: 256M (8Mx32)
• Speed: 166MHz
• Interface: Parallel
• Voltage - Supply: 1.7 V ~ 1.95 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 90-VFBGA
• Organization: 8Mx32
• Density: 256Mb
• Address Bus: 14b
• Access Time (max): 6.5/5ns
• Maximum Clock Rate: 166MHz
• Operating Supply Voltage (typ): 1.8V
• Package Type: VFBGA
• Operating Temp Range: 0C to 70C
• Operating Supply Voltage (max): 1.95V
• Operating Supply Voltage (min): 1.7V
• Supply Current: 120mA
• Pin Count: 90
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 557-1280-2; MT46H8M32LFB5-6:A TR

PRECHARGE
Figure 32:
PDF: 09005aef82091978 / Source: 09005aef8209195b
MT46H16M16LF__2.fm - Rev. H 6/08 EN
PRECHARGE Command
Notes:
The PRECHARGE command (Figure 32) is used to deactivate the open row in a partic-
ular bank or the open row in all banks. The bank(s) will be available for a subsequent
row access some specified time (
A10 determines whether one or all banks are to be precharged. In the case where only
one bank is to be precharged (A10 = LOW), inputs BA0–BA1 select the bank. When all
banks are to be precharged (A10 = HIGH), inputs BA0–BA1 are treated as a “Don’t Care.”
After a bank has been precharged, it is in the idle state and must be activated prior to any
READ or WRITE commands being issued to that bank.
BA0, BA1
1. BA = bank address.
2. A10 = 1 HIGH, all banks to be precharged, BA1, BA0 are “Don’t Care.”
3. A10 = 0 LOW, only bank selected by BA1 and BA0 will be precharged.
4. i = the most significant column address bit for each configuration.
A0–A9,
A11–Ai
RAS#
CAS#
WE#
CKE
A10
CK#
CS#
CK
HIGH
Single
Don’t Care
BA
All
47
t
RP) after the PRECHARGE command is issued. Input
Micron Technology, Inc., reserves the right to change products or specifications without notice.
256Mb: x16, x32 Mobile DDR SDRAM
©2005 Micron Technology, Inc. All rights reserved.
Operations