AS4SD8M16 Datasheet, PDF (1/51 Pages) Austin Semiconductor – 128 Mb: 8 Meg x 16 SDRAM Synchronous DRAM Memory

Austin Semiconductor, Inc.
SDRAM
AS4SD8M16
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
OPTIONS
• Plastic Package - OCPL*
54-pin TSOP (400 mil)
MARKING
DG No. 901
• Timing (Cycle Time)
7.5ns @ CL = 3 (PC133) or
-75
7.5ns @ CL = 2 (PC100)
• 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***
PIN ASSIGNMENT
(Top View)
54-Pin TSOP
V_DD
1
DQ0
2
V_DDQ
3
DQ1
4
DQ2
5
V_SSQ
6
DQ3
7
DQ4
8
V_DDQ
9
DQ5
10
DQ6
11
V_SSQ
12
DQ7
13
V_DD
14
DQML
15
WE\
16
CAS\
17
RAS\
18
CS\
19
BA0
20
BA1
21
A10
22
A0
23
A1
24
A2
25
A3
26
V_DD
27
54
V_SS
53
DQ15
52
V_SSQ
51
DQ14
50
DQ13
49
V_DDQ
48
DQ12
47
DQ11
46
V_SSQ
45
DQ10
44
DQ9
43
V_DDQ
42
DQ8
41
V_SS
40
NC
39
DQMH
38
CLK
37
CKE
36
NC
35
A11
34
A9
33
A8
32
A7
31
A6
30
A5
29
A4
28
Vss
KEY TIMING PARAMETERS
SPEED
GRADE
-75
-75
CLOCK
ACCESS TIME
FREQUENCY CL = 2** CL = 3**
133 MHz
–
5.4ns
100 MHz
6ns
–
*Off-center parting line
**CL = CAS (READ) latency
***Consult Factory
SETUP
TIME
1.5ns
1.5ns
AS4SD8M16
Rev. 0.5 04/05
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
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
1