256Mb: x4, x8, x16 SDRAM
Features
SDR SDRAM
MT48LC64M4A2 16 Meg x 4 x 4 banks
MT48LC32M8A2 8 Meg x 8 x 4 banks
MT48LC16M16A2 4 Meg x 16 x 4 banks
Options Marking
Features
60-ball TFBGA (x4, x8) (8mm x FB
PC100- and PC133-compliant
16mm)
Fully synchronous; all signals registered on positive
60-ball TFBGA (x4, x8) (8mm x BB
edge of system clock
16mm) Pb-free
Internal, pipelined operation; column address can
2
54-ball VFBGA (x16) (8mm x 14 mm) FG
be changed every clock cycle
2
54-ball VFBGA (x16) (8mm x 14 mm) BG
Internal banks for hiding row access/precharge
Pb-free
Programmable burst lengths: 1, 2, 4, 8, or full page
3
54-ball VFBGA (x16) (8mm x 8 mm) F4
Auto precharge, includes concurrent auto precharge
3
54-ball VFBGA (x16) (8mm x 8 mm) B4
and auto refresh modes
Pb-free
Self refresh mode (not available on AT devices)
Timing cycle time
Auto refresh
6ns @ CL = 3 (x8, x16 only) -6A
64ms, 8192-cycle refresh (commercial and
2
7.5ns @ CL = 3 (PC133) -75
industrial)
7.5ns @ CL = 2 (PC133) -7E
16ms, 8192-cycle refresh (automotive)
Self refresh
LVTTL-compatible inputs and outputs
Standard None
Single 3.3V 0.3V power supply
2 4
Low power L ,
Operating temperature range
Options Marking
Commercial (0C to +70C) None
Configurations
Industrial (40C to +85C) IT
64 Meg x 4 (16 Meg x 4 x 4 banks) 64M4
4
Automotive (40C to +105C) AT
32 Meg x 8 (8 Meg x 8 x 4 banks) 32M8
Revision :D/:G
16 Meg x 16 (4 Meg x 16 x 4 banks) 16M16
t
Write recovery ( WR)
1. Off-center parting line.
Notes:
t
WR = 2 CLK A2
2. Only available on Revision D.
1
Plastic package OCPL
3. Only available on Revision G.
1
54-pin TSOP II OCPL (400 mil) TG
4. Contact Micron for availability.
(standard)
1
54-pin TSOP II OCPL (400 mil) P
Pb-free
Table 1: Key Timing Parameters
CL = CAS (READ) latency
Clock
t t t t
Speed Grade Frequency (MHz) Target RCD- RP-CL RCD (ns) RP (ns) CL (ns)
-6A 167 3-3-3 18 18 18
-75 133 3-3-3 20 20 20
-7E 133 2-2-2 15 15 15
PDF: 09005aef8091e6d1 Micron Technology, Inc. reserves the right to change products or specifications without notice.
1
256Mb_sdr.pdf - Rev. W 05/15 EN 1999 Micron Technology, Inc. All rights reserved.
Products and specifications discussed herein are subject to change by Micron without notice.256Mb: x4, x8, x16 SDRAM
Features
Table 2: Address Table
Parameter 64 Meg x 4 32 Meg x 8 16 Meg x 16
Configuration 16 Meg x 4 x 4 banks 8 Meg x 8 x 4 banks 4 Meg x 16 x 4 banks
Refresh count 8K 8K 8K
Row addressing 8K A[12:0] 8K A[12:0] 8K A[12:0]
Bank addressing 4 BA[1:0] 4 BA[1:0] 4 BA[1:0]
Column addressing 2K A[9:0], A11 1K A[9:0] 512 A[8:0]
Table 3: 256Mb SDR Part Numbering
Part Numbers Architecture Package
MT48LC64M4A2TG 64 Meg x 4 54-pin TSOP II
MT48LC64M4A2P 64 Meg x 4 54-pin TSOP II
1
MT48LC64M4A2FB 64 Meg x 4 60-ball FBGA
1
MT48LC64M4A2BB 64 Meg x 4 60-ball FBGA
MT48LC32M8A2TG 32 Meg x 8 54-pin TSOP II
MT48LC32M8A2P 32 Meg x 8 54-pin TSOP II
1
MT48LC32M8A2FB 32 Meg x 8 60-ball FBGA
1
MT48LC32M8A2BB 32 Meg x 8 60-ball FBGA
MT48LC16M16A2TG 16 Meg x 16 54-pin TSOP II
MT48LC16M16A2P 16 Meg x 16 54-pin TSOP II
MT48LC16M16A2FG 16 Meg x 16 54-ball FBGA
MT48LC16M16A2BG 16 Meg x 16 54-ball FBGA
Note: 1. FBGA Device Decoder: www.micron.com/decoder.
PDF: 09005aef8091e6d1 Micron Technology, Inc. reserves the right to change products or specifications without notice.
2
256Mb_sdr.pdf - Rev. W 05/15 EN 1999 Micron Technology, Inc. All rights reserved.