MT47H256M8EB-25E IT:C Micron Technology Inc, MT47H256M8EB-25E IT:C Datasheet - Page 17
![no-image](/images/manufacturer_photos/0/4/441/micron_technology_inc_sml.jpg)
MT47H256M8EB-25E IT:C
Manufacturer Part Number
MT47H256M8EB-25E IT:C
Description
256MX8 DDR2 SDRAM PLASTIC PBF FBGA 1.8V
Manufacturer
Micron Technology Inc
Datasheet
1.MT47H256M8EB-25E_ITC.pdf
(134 pages)
Specifications of MT47H256M8EB-25E IT:C
Lead Free Status / RoHS Status
Compliant
- Current page: 17 of 134
- Download datasheet (10Mb)
Table 3: FBGA 84-Ball – x16 and 60-Ball – x4, x8 Descriptions
PDF: 09005aef824f87b6
2gbddr2.pdf – Rev. E 06/10 EN
RAS#, CAS#, WE#
LDM, UDM (DM)
A[14:0] (x4, x8)
DQ[15:0] (x16)
A[13:0] (x16)
DQ[3:0] (x4)
DQ[7:0] (x8)
Symbol
CK, CK#
BA[2:0]
ODT
CKE
CS#
Type
Input
Input
Input
Input
Input
Input
Input
Input
I/O
Description
Address inputs: Provide the row address for ACTIVE commands, and the column ad-
dress and auto precharge bit (A10) for READ/WRITE commands, to select one location out
of the memory array in the respective bank. A10 sampled during a PRECHARGE com-
mand determines whether the PRECHARGE applies to one bank (A10 LOW, bank selected
by BA[2:0]) or all banks (A10 HIGH). The address inputs also provide the op-code during a
LOAD MODE command.
Bank address inputs: BA[2:0] define to which bank an ACTIVE, READ, WRITE, or PRE-
CHARGE command is being applied. BA[2:0] define which mode register, including MR,
EMR, EMR(2), and EMR(3), is loaded during the LOAD MODE command.
Clock: CK and CK# are differential clock inputs. All address and control input signals are
sampled on the crossing of the positive edge of CK and negative edge of CK#. Output
data (DQ and DQS/DQS#) is referenced to the crossings of CK and CK#.
Clock enable: CKE (registered HIGH) activates and CKE (registered LOW) deactivates
clocking circuitry on the DDR2 SDRAM. The specific circuitry that is enabled/disabled is
dependent on the DDR2 SDRAM configuration and operating mode. CKE LOW provides
precharge power-down and SELF REFRESH operation (all banks idle), or ACTIVATE power-
down (row active in any bank). CKE is synchronous for power-down entry, power-down
exit, output disable, and for self refresh entry. CKE is asynchronous for SELF REFRESH ex-
it. Input buffers (excluding CK, CK#, CKE, and ODT) are disabled during power-down.
Input buffers (excluding CKE) are disabled during self refresh. CKE is an SSTL_18 input
but will detect a LVCMOS LOW level once V
has become stable during the power on and initialization sequence, it must be main-
tained for proper operation of the CKE receiver. For proper SELF REFRESH operation, V
must be maintained.
Chip select: CS# enables (registered LOW) and disables (registered HIGH) the command
decoder. All commands are masked when CS# is registered high. CS# provides for exter-
nal bank selection on systems with multiple ranks. CS# is considered part of the com-
mand code.
Input data mask: DM is an input mask signal for write data. Input data is masked when
DM is concurrently sampled HIGH during a WRITE access. DM is sampled on both edges
of DQS. Although DM balls are input-only, the DM loading is designed to match that of
DQ and DQS balls. LDM is DM for lower byte DQ[7:0] and UDM is DM for upper byte
DQ[15:8].
On-die termination: ODT (registered HIGH) enables termination resistance internal to
the DDR2 SDRAM. When enabled, ODT is only applied to each of the following balls:
DQ[15:0], LDM, UDM, LDQS, LDQS#, UDQS, and UDQS# for the x16; DQ[7:0], DQS, DQS#,
RDQS, RDQS#, and DM for the x8; DQ[3:0], DQS, DQS#, and DM for the x4. The ODT input
will be ignored if disabled via the LOAD MODE command.
Command inputs: RAS#, CAS#, and WE# (along with CS#) define the command being
entered.
Data input/output: Bidirectional data bus for 128 Meg x 16.
Bidirectional data bus for 512 Meg x 4.
Bidirectional data bus for 256 Meg x 8.
17
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Ball Assignments and Descriptions
DD
2Gb: x4, x8, x16 DDR2 SDRAM
is applied during first power-up. After V
© 2006 Micron Technology, Inc. All rights reserved.
REF
REF
Related parts for MT47H256M8EB-25E IT:C
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![MT47H256M8EB-25E:C](/images/manufacturer_photos/0/4/441/micron_technology_inc_tmb.jpg)
Part Number:
Description:
256MX8 DDR2 SDRAM PLASTIC GREEN FBGA 1.8V
Manufacturer:
Micron Technology Inc
Datasheet:
![MT47H256M8EB-187E:C](/images/manufacturer_photos/0/4/441/micron_technology_inc_tmb.jpg)
Part Number:
Description:
IC DDR2 SDRAM 2GBIT 60FBGA
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC8M8A2P-75:G](/photos/7/22/72261/557-54-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 64MBIT 133MHZ 54TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC2M32B2P-55:G](/photos/7/22/72264/557-86-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 64MBIT 5.5NS 86TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC2M32B2P-5:G](/photos/7/22/72264/557-86-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 64MBIT 200MHZ 86TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC16M4A2P-75:G](/photos/7/22/72261/557-54-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 64MBIT 133MHZ 54TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC8M16A2P-75:G](/photos/7/22/72261/557-54-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 128MBIT 133MHZ 54TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48H8M32LFB5-75:H](/images/manufacturer_photos/0/4/441/micron_technology_inc_tmb.jpg)
Part Number:
Description:
IC SDRAM 256MBIT 133MHZ 90VFBGA
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC16M8A2P-75:G](/photos/7/22/72261/557-54-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 128MBIT 133MHZ 54TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC32M8A2P-7E:D](/photos/7/22/72261/557-54-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 256MBIT 133MHZ 54TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT46V64M8P-6T:F](/photos/7/22/72288/mfg557-66-tsop_tmb.jpg)
Part Number:
Description:
IC DDR SDRAM 512MBIT 6NS 66TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC4M32B2P-6:G](/photos/7/22/72264/557-86-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 128MBIT 167MHZ 86TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC4M32B2P-7:G](/photos/7/22/72264/557-86-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 128MBIT 143MHZ 86TSOP
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48H16M16LFBF-75:H](/photos/31/34/313423/557-54-vfbga_tmb.jpg)
Part Number:
Description:
SDRAM 256M-BIT 1.8V 54-PIN VFBGA
Manufacturer:
Micron Technology Inc
Datasheet:
![MT48LC4M32B2TG-7:G](/photos/7/22/72264/557-86-tsop_tmb.jpg)
Part Number:
Description:
IC SDRAM 128MBIT 143MHZ 86TSOP
Manufacturer:
Micron Technology Inc
Datasheet: