OBSOLETE
128K x 18, 64K x 32/36
3.3V I/O, PIPELINED, DCD SYNCBURST SRAM
SYNCBURST
SRAM
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Fast access times: 4.5ns, 5ns, 6ns and 7ns
Fast OE# access times: 4.5ns and 5ns
Single +3.3V +0.3V/-0.165V power supply (V
DD
)
Separate +3.3V +0.3V/-0.165V isolated output buffer
supply (V
DD
Q)
SNOOZE MODE for reduced power standby
Common data inputs and data outputs
Individual BYTE WRITE control and GLOBAL WRITE
Three chip enables for simple depth expansion and
address pipelining
Clock-controlled and registered addresses, data I/Os
and control signals
Internally self-timed WRITE cycle
Burst control pin (interleaved or linear burst)
Automatic power-down for portable applications
100-lead TQFP package for high density, high speed
Low capacitive bus loading
x18, x32 and x36 options available
MT58LC128K18C5, MT58LC64K32C5,
MT58LC64K36C5
3.3V Supply, Pipelined, Burst Counter and
Double-Cycle Deselect
100-Pin TQFP*
(SA-1)
*JEDEC-standard MS-026 BHA (LQFP).
OPTIONS
• Clock Cycle Timing
7.5ns/133 MHz
8.5ns/117 MHz
10ns/100 MHz
11ns/90 MHz
15ns/66 MHz
• Configurations
128K x 18
64K x 32
64K x 36
• Package
100-pin TQFP
MARKING
-7.5
-8.5
-10
-11
-15
MT58LC128K18C5
MT58LC64K32C5
MT58LC64K36C5
LG
data inputs, active LOW chip enable (CE#), two additional
chip enables for easy depth expansion (CE2, CE2#), burst
control inputs (ADSC#, ADSP#, ADV#), byte write enables
(BWx#) and global write (GW#).
Asynchronous inputs include the output enable (OE#),
clock (CLK) and snooze enable (ZZ). There is also a burst
mode pin (MODE) that selects between interleaved and
linear burst modes. The data-out (Q), enabled by OE#, is
also asynchronous. WRITE cycles can be from one to two
bytes wide (x18) or from one to four bytes wide (x32/x36)
as controlled by the write control inputs.
Burst operation can be initiated with either address status
processor (ADSP#) or address status controller (ADSC#)
input pins. Subsequent burst addresses can be internally
generated as controlled by the burst advance pin (ADV#).
Address and write control are registered on-chip to
simplify WRITE cycles. This allows self-timed WRITE cycles.
Individual byte enables allow individual bytes to be written.
During WRITE cycles on the x18 device, BWa# controls
DQa pins and DQPa; BWb# controls DQb pins and DQPb.
During WRITE cycles on the x32 and x36 devices, BWa#
controls DQa pins and DQPa; BWb# controls DQb pins and
DQPb; BWc# controls DQc pins and DQPc; BWd# controls
DQd pins and DQPd. GW# LOW causes all bytes to be
• Part Number Example: MT58LC128K18C5LG-10
GENERAL DESCRIPTION
The Micron SyncBurst SRAM family employs high-
speed, low-power CMOS designs that are fabricated using
an advanced CMOS process.
The MT58LC128K18C5 and MT58LC64K32/36C5 SRAMs
integrate a 128K x 18, 64K x 32 or 64K x 36 SRAM core with
advanced synchronous peripheral circuitry and a 2-bit
burst counter. All synchronous inputs pass through registers
controlled by a positive-edge-triggered single clock input
(CLK). The synchronous inputs include all addresses, all
128K x 18, 64K x 32/36 3.3V I/O, Pipelined, DCD SyncBurst SRAM
Y28.pm6 – Rev. 2/98
1
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©1998,
Micron Technology, Inc.
PowerPC is a trademark of IBM Corporation.
Pentium is a registered trademark of Intel Corporation.
OBSOLETE
128K x 18, 64K x 32/36
3.3V I/O, PIPELINED, DCD SYNCBURST SRAM
PIN ASSIGNMENT (Top View)
100-Pin TQFP
(SA-1)
SA
NC
NC
V
DD
Q
V
SS
NC
DQPa
DQa
DQa
V
SS
V
DD
Q
DQa
DQa
V
SS
NC
V
DD
ZZ
DQa
DQa
V
DD
Q
V
SS
DQa
DQa
NC
NC
V
SS
V
DD
Q
NC
NC
NC
SA
SA
ADV#
ADSP#
ADSC#
OE#
BWE#
GW#
CLK
V
SS
V
DD
CE2#
BWa#
BWb#
NC
NC
CE2
CE#
SA
SA
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
81
49
82
48
83
47
84
46
85
45
86
44
87
43
88
42
89
41
90
40
91
39
92
38
93
37
94
36
95
35
96
34
97
33
98
32
99
31
100
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
x18
NC/SA*
SA
SA
SA
SA
SA
SA
DNU
DNU
V
DD
V
SS
DNU
DNU
SA0
SA1
SA
SA
SA
SA
MODE
SA
SA
ADV#
ADSP#
ADSC#
OE#
BWE#
GW#
CLK
V
SS
V
DD
CE2#
BWa#
BWb#
BWc#
BWd#
CE2
CE#
SA
SA
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
81
49
82
48
83
47
84
46
85
45
86
44
87
43
88
42
89
41
90
40
91
39
92
38
93
37
94
36
95
35
96
34
97
33
98
32
99
31
100
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
NC/DQPb**
DQb
DQb
V
DD
Q
V
SS
DQb
DQb
DQb
DQb
V
SS
V
DD
Q
DQb
DQb
V
SS
NC
V
DD
ZZ
DQa
DQa
V
DD
Q
V
SS
DQa
DQa
DQa
DQa
V
SS
V
DD
Q
DQa
DQa
NC/DQPa**
NC
NC
NC
V
DD
Q
V
SS
NC
NC
DQb
DQb
V
SS
V
DD
Q
DQb
DQb
V
DD
V
DD
NC
V
SS
DQb
DQb
V
DD
Q
V
SS
DQb
DQb
DQPb
NC
V
SS
V
DD
Q
NC
NC
NC
x32/x36
NC/SA*
SA
SA
SA
SA
SA
SA
DNU
DNU
V
DD
V
SS
DNU
DNU
SA0
SA1
SA
SA
SA
SA
MODE
* Pin 50 is reserved for address expansion.
** No Connect (NC) is used in the x32 version. Parity (DQPx) is used in the x36 version.
128K x 18, 64K x 32/36 3.3V I/O, Pipelined, DCD SyncBurst SRAM
Y28.pm6 – Rev. 2/98
NC/DQPc**
DQc
DQc
V
DD
Q
V
SS
DQc
DQc
DQc
DQc
V
SS
V
DD
Q
DQc
DQc
V
DD
V
DD
NC
V
SS
DQd
DQd
V
DD
Q
V
SS
DQd
DQd
DQd
DQd
V
SS
V
DD
Q
DQd
DQd
NC/DQPd**
2
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©1998,
Micron Technology, Inc.
OBSOLETE
128K x 18, 64K x 32/36
3.3V I/O, PIPELINED, DCD SYNCBURST SRAM
GENERAL DESCRIPTION (continued)
written. Parity pins are only available on the x18 and x36
versions.
The device incorporates an additional pipelined enable
register which delays turning off the output buffer an
additional cycle when a deselect is executed. This feature
allows depth expansion without penalizing system
performance.
The MT58LC128K18C5 and MT58LC64K32/36C5 oper-
ate from a +3.3V power supply, and all inputs and outputs
are TTL-compatible. The device is ideally suited for Pentium
®
and PowerPC™ pipelined systems and systems that benefit
from a very wide, high-speed data bus. The device is
also ideal in generic 16-, 18-, 32-, 36-, 64- and 72-bit-wide
applications.
Please refer to the Micron Web site (www.micron.com./
mti/msp/html/sramprod.html) for the latest data sheet
revisions.
TQFP PIN ASSIGNMENT TABLE
PIN #
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
x18
NC
NC
NC
x32/x36
NC/DQPc**
DQc
DQc
V
DD
Q
V
SS
DQc
DQc
DQc
DQc
V
SS
V
DD
Q
DQc
DQc
V
DD
V
DD
NC
V
SS
DQd
DQd
V
DD
Q
V
SS
DQd
DQd
DQd
DQd
PIN #
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
x18
x32/x36
V
SS
V
DD
Q
NC
DQd
NC
DQd
NC
NC/DQPd**
MODE
SA
SA
SA
SA
SA1
SA0
DNU
DNU
V
SS
V
DD
DNU
DNU
SA
SA
SA
SA
SA
SA
NC/SA*
PIN #
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
x18
NC
NC
NC
x32/x36
NC/DQPa**
DQa
DQa
V
DD
Q
V
SS
DQa
DQa
DQa
DQa
V
SS
V
DD
Q
DQa
DQa
ZZ
V
DD
NC
V
SS
DQb
DQb
V
DD
Q
V
SS
DQb
DQb
DQb
DQb
PIN #
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
x18
x32/x36
V
SS
V
DD
Q
DQb
DQb
NC/DQPb**
SA
SA
ADV#
ADSP#
ADSC#
OE#
BWE#
GW#
CLK
V
SS
V
DD
CE2#
BWa#
BWb#
BWc#
BWd#
CE2
CE#
SA
SA
NC
NC
SA
NC
NC
DQb
DQb
NC
NC
DQb
DQb
DQb
DQb
DQa
DQa
NC
NC
DQb
DQb
DQPb
NC
DQa
DQa
DQPa
NC
* Pin 50 is reserved for address expansion.
** No Connect (NC) is used in the x32 version. Parity (DQPx) is used in the x36 version.
128K x 18, 64K x 32/36 3.3V I/O, Pipelined, DCD SyncBurst SRAM
Y28.pm6 – Rev. 2/98
3
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©1998,
Micron Technology, Inc.