256Mb: x32
SDRAM
SYNCHRONOUS
DRAM
MT48LC8M32B2 - 2 MEG x 32 x 4 BANKS
For the latest data sheet, please refer to the Micron Web
site: www.micron.com/dramds
Features
Figure 1: Pin Assignment (Top View)
86-Pin TSOP
• PC100 functionality
• Fully synchronous; all signals registered on positive
edge of system clock
• Internal pipelined operation; column address can
be changed every clock cycle
• Internal banks for hiding row access/precharge
• Programmable burst lengths: 1, 2, 4, 8, or full page
• Auto Precharge, includes Concurrent Auto
Precharge, and Auto Refresh Modes
• Self Refresh Mode
• 64ms, 4,096-cycle refresh (15.6µs/row)
• LVTTL-compatible inputs and outputs
• Single +3.3V ±0.3V power supply
• Supports CAS latency of 1, 2, and 3
Options
Marking
Configuration
• 8 Meg x 32 (2 Meg x 32 x 4 banks)
Package
• 86-pin TSOP (400 mil)
• 86-pin TSOP (400 mil) lead-free
• 90-ball FBGA (8mm x 13mm)
• 90-ball FBGA (8mm x 13mm) leadfree
Timing (Cycle Time)
• 6ns (166 MHz)
• 7ns (143 MHz)
Operating Temperature Range
• Commercial (0°C to +70°C)
• Industrial (-40°C to +85°C)
NOTE:
VDD
DQ0
VDDQ
DQ1
DQ2
VSSQ
DQ3
DQ4
VDDQ
DQ5
DQ6
VSSQ
DQ7
NC
VDD
DQM0
WE#
CAS#
RAS#
CS#
A11
BA0
BA1
A10
A0
A1
A2
DQM2
VDD
NC
DQ16
VSSQ
DQ17
DQ18
VDDQ
DQ19
DQ20
VSSQ
DQ21
DQ22
VDDQ
DQ23
VDD
8M32B2
TG
P
F5
B5
-6
-7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
VSS
DQ15
VSSQ
DQ14
DQ13
VDDQ
DQ12
DQ11
VSSQ
DQ10
DQ9
VDDQ
DQ8
NC
VSS
DQM1
NC
NC
CLK
CKE
A9
A8
A7
A6
A5
A4
A3
DQM3
VSS
NC
DQ31
VDDQ
DQ30
DQ29
VSSQ
DQ28
DQ27
VDDQ
DQ26
DQ25
VSSQ
DQ24
VSS
NOTE:
None
The # symbol indicates signal is active LOW.
IT1
1. Available on -7 only.
8 Meg x 32
Table 1:
Key Timing Parameters
SPEED
CLOCK
GRADE FREQUENCY
-6
-7
166 MHz
143 MHz
ACCESS
TIME
CL = 3*
SETUP
TIME
HOLD
TIME
5.5ns
6.0ns
1.5ns
2ns
Configuration
Refresh Count
Row Addressing
Bank Addressing
Column Addressing
1ns
1ns
Part Number Example:
MT48LC8M32B2TG-7
*CL = CAS (READ) latency
09005aef8140ad6d
MT48LC8M32B2_1.fm - Rev. B 10/04 EN
2 Meg x 32 x 4 banks
4K
4K (A0–A11)
4 (BA0, BA1)
512 (A0–A8)
1
©2003 Micron Technology, Inc. All rights reserved.
