MT47H128M16HG-3:A Micron Technology Inc, MT47H128M16HG-3:A Datasheet - Page 115

• Manufacturer Part Number: MT47H128M16HG-3:A
• Manufacturer: Micron Technology Inc
• Type: DDR2 SDRAMr

Specifications of MT47H128M16HG-3:A

• Organization: 128Mx16
• Address Bus: 17b
• Access Time (max): 450ps
• Maximum Clock Rate: 667MHz
• Operating Supply Voltage (typ): 1.8V
• Package Type: FBGA
• Operating Temp Range: 0C to 70C
• Operating Supply Voltage (max): 1.9V
• Operating Supply Voltage (min): 1.7V
• Supply Current: 275mA
• Pin Count: 84
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

REFRESH
Figure 68: Refresh Mode
PDF: 09005aef824f87b6
2gbddr2.pdf – Rev. F 12/10 EN
DQS, DQS# 4
Command
Address
Bank
DM 4
DQ 4
CK#
CKE
A10
CK
NOP 1
T0
Notes:
One bank
All banks
Bank(s)
PRE
T1
The commercial temperature DDR2 SDRAM requires REFRESH cycles at an average in-
terval of 7.8125µs (MAX) and all rows in all banks must be refreshed at least once every
64ms. The refresh period begins when the REFRESH command is registered and ends
t
ceeds +85°C.
RFC (MIN) later. The average interval must be reduced to 3.9µs (MAX) when T
3
1. NOP commands are shown for ease of illustration; other valid commands may be possi-
2. The second REFRESH is not required and is only shown as an example of two back-to-
3. “Don’t Care” if A10 is HIGH at this point; A10 must be HIGH if more than one bank is
4. DM, DQ, and DQS signals are all “Don’t Care”/High-Z for operations shown.
t CK
ble at these times. CKE must be active during clock positive transitions.
back REFRESH commands.
active (must precharge all active banks).
NOP 1
T2
t CH
t RP
t CL
NOP 1
T3
115
REF
T4
t RFC (MIN)
NOP 1
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Ta0
2Gb: x4, x8, x16 DDR2 SDRAM
REF 2
Ta1
Indicates a break in
time scale
NOP 1
Tb0
© 2006 Micron Technology, Inc. All rights reserved.
t RFC 2
NOP 1
Tb1
Don’t Care
REFRESH
C
ex-
Tb2
ACT
RA
RA
BA