SDRAM
Austin Semiconductor, Inc.
128 Mb: 8 Meg x 16 SDRAM
Synchronous DRAM Memory
FEATURES
• Full Military temp (-55°C to 125°C) processing avail-
able
• Configuration: 8 Meg x 16 (2 Meg x 16 x 4 banks)
• 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 (IT)
• 64ms, 4,096-cycle refresh (IT)
• <24ms 4,096 cycle recfresh (XT)
• WRITE Recovery (t
WR
= “2 CLK”)
• LVTTL-compatible inputs and outputs
• Single +3.3V ±0.3V power supply
V
DD
DQ0
V
DD
Q
DQ1
DQ2
V
SS
Q
DQ3
DQ4
V
DD
Q
DQ5
DQ6
V
SS
Q
DQ7
V
DD
DQML
WE\
CAS\
RAS\
CS\
BA0
BA1
A10
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
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
V
SS
DQ15
V
SS
Q
DQ14
DQ13
V
DD
Q
DQ12
DQ11
V
SS
Q
DQ10
DQ9
V
DD
Q
DQ8
V
SS
NC
DQMH
CLK
CKE
NC
A11
A9
A8
A7
A6
A5
A4
Vss
AS4SD8M16
PIN ASSIGNMENT
(Top View)
54-Pin TSOP
OPTIONS
• Plastic Package - OCPL*
54-pin TSOP (400 mil)
•
MARKING
DG
No. 901
Timing (Cycle Time)
7.5ns @ CL = 3 (PC133) or
7.5ns @ CL = 2 (PC100)
-75
A0
A1
A2
A3
V
DD
•
Operating Temperature Ranges
-Industrial Temp (-40°C to 85° C)
IT
-Industrial Plus Temp
(-45°C to +105°C)
ET
-Military Temp (-55°C to 125°C)
XT***
KEY TIMING PARAMETERS
SPEED
CLOCK
ACCESS TIME
GRADE FREQUENCY CL = 2** CL = 3**
-75
133 MHz
–
5.4ns
-75
100 MHz
6ns
–
*Off-center parting line
**CL = CAS (READ) latency
***Consult Factory
SETUP
TIME
1.5ns
1.5ns
HOLD
TIME
0.8ns
0.8ns
8 Meg x 16
Configuration
2 Meg x 16 x 4 banks
Refresh Count
4K
Row Addressing
4K (A0-A11)
Bank Addressing
4 (BA0, BA1)
Column Addressing
512 (A0-A8)
Note: “\” indicates an active low.
For more products and information
please visit our web site at
www.austinsemiconductor.com
AS4SD8M16
Rev. 0.5 04/05
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
1
AUSTIN [ AUSTIN SEMICONDUCTOR ]
