HIGH-SPEED
64K x 8 DUAL-PORT
STATIC RAM
Features
x
x
x
IDT7008S/L
x
x
True Dual-Ported memory cells which allow simultaneous
reads of the same memory location
High-speed access
– Military: 25/35/55ns (max.)
– Industrial: 55ns (max.)
– Commercial: 20/25/35/55ns (max.)
Low-power operation
– IDT7008S
Active: 750mW (typ.)
Standby: 5mW (typ.)
– IDT7008L
Active: 750mW (typ.)
Standby: 1mW (typ.)
Dual chip enables allow for depth expansion without
external logic
x
x
x
x
x
x
x
x
IDT7008 easily expands data bus width to 16 bits or
more using the Master/Slave select when cascading more
than one device
M/S = V
IH
for
BUSY
output flag on Master,
M/S = V
IL
for
BUSY
input on Slave
Interrupt Flag
On-chip port arbitration logic
Full on-chip hardware support of semaphore signaling
between ports
Fully asynchronous operation from either port
TTL-compatible, single 5V (±10%) power supply
Available in 84-pin PGA, 84-pin PLCC, and a 100-pin TQFP
Industrial temperature range (–40°C to +85°C) is available
for selected speeds
Functional Block Diagram
R/W
L
CE
0L
CE
1L
OE
L
R/W
R
CE
0R
CE
1R
OE
R
I/O
0-7L
I/O
Control
I/O
Control
I/O
0-7R
BUSY
L
A
15L
A
0L
(1,2)
BUSY
R
64Kx8
MEMORY
ARRAY
7008
16
16
(1,2)
Address
Decoder
Address
Decoder
A
15R
A
0R
CE
0L
CE
1L
OE
L
R/W
L
SEM
L
(2)
INT
L
ARBITRATION
INTERRUPT
SEMAPHORE
LOGIC
CE
0R
CE
1R
OE
R
R/W
R
SEM
R
(2)
INT
R
3198 drw 01
M/S
(1)
NOTES:
1.
BUSY
is an input as a Slave (M/S = V
IL
) and an output when it is a Master (M/S = V
IH
).
2.
BUSY
and
INT
are non-tri-state totem-pole outputs (push-pull).
MAY 2000
DSC 3198/6
1
©2000 Integrated Device Technology, Inc.
IDT7008S/L
High-Speed 64K x 8 Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Description
The IDT7008 is a high-speed 64K x 8 Dual-Port Static RAM. The
IDT7008 is designed to be used as a stand-alone 512K-bit Dual-Port RAM
or as a combination MASTER/SLAVE Dual-Port RAM for 16-bit-or-more
word systems. Using the IDT MASTER/SLAVE Dual-Port RAM approach
in 16-bit or wider memory system applications results in full-speed, error-
free operation without the need for additional discrete logic.
This device provides two independent ports with separate control,
address, and I/O pins that permit independent, asynchronous access for
reads or writes to any location in memory. An automatic power down
feature controlled by the chip enables (CE
0
and CE
1
) permit the on-chip
circuitry of each port to enter a very low standby power mode.
Fabricated using IDT’s CMOS high-performance technology, these
devices typically operate on only 750mW of power.
The IDT7008 is packaged in a 84-pin Ceramic Pin Grid Array (PGA),
a 84-pin Plastic Leadless Chip Carrier (PLCC) and a 100-pin Thin Quad
Flatpack (TQFP).
Pin Configurations
(1,2,3)
A
7R
A
8R
A
9R
A
10R
A
11R
A
12R
A
13R
A
14R
A
15R
NC
GND
NC
NC
CE
0R
CE
1R
SEM
R
R/W
R
OE
R
GND
11 10 9
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
IDT7008J
J84-1
(4)
84-Pin PLCC
Top View
(5)
8 7
6 5
4 3
INDEX
A
6R
A
5R
A
4R
A
3R
A
2R
A
1R
A
0R
INT
R
BUSY
R
M/S
GND
BUSY
L
INT
L
NC
A
0L
A
1L
A
2L
A
3L
A
4L
A
5L
A
6L
2 1 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
GND
NC
NC
I/O
7R
I/O
6R
I/O
5R
I/O
4R
I/O
3R
Vcc
I/O
2R
I/O
1R
I/O
0R
GND
Vcc
I/O
0L
I/O1
L
GND
I/O
2L
I/O
3L
I/O
4L
I/O
5L
I/O
6L
I/O
7L
,
3198 drw 02
55
31
54
32
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
NOTES:
1. This text does not indicate orientation of the actual part marking.
2. All Vcc pins must be connected to power supply.
3. Package body is approximately 1.15 in x 1.15 in x .17 in.
4. This package code is used to reference the package diagram.
5. All GND pins must be connected to ground supply.
A
7L
A
8L
A
9L
A
10L
A
11L
A
12L
A
13L
A
14L
A
15L
NC
Vcc
NC
NC
CE
0L
CE
1L
SEM
L
RIW
L
OE
L
GND
2
GND
NC
IDT7008S/L
High-Speed 64K x 8 Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Pin Configurations
(1,2,3)
(con't.)
Index
NC
NC
A
7L
A
8L
A
9L
A
10L
A
11L
A
12L
A
13L
A
14L
A
15L
NC
Vcc
NC
NC
NC
NC
CE
0L
CE
1L
SEM
L
R/W
L
OE
L
GND
NC
NC
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
1
75
2
74
3
73
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
72
71
70
69
68
67
NC
NC
A
6L
A
5L
A
4L
A
3L
A
2L
A
1L
A
0L
NC
INT
L
BUSY
L
GND
M/S
BUSY
R
INT
R
A
0R
A
1R
A
2R
A
3R
A
4R
A
5R
A
6R
NC
NC
IDT7008PF
PN100-1
(4)
100-Pin TQFP
Top View
(5)
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
25
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
NC
NC
A
7R
A
8R
A
9R
A
10R
A
11R
A
12R
A
13R
A
14R
A
15R
NC
GND
NC
NC
NC
NC
CE
0R
CE
1R
SEM
R
R/W
R
OE
R
GND
GND
NC
,
3198 drw 03
NOTES:
1. This text does not indicate orientation of the actual part marking.
2. All Vcc pins must be connected to power supply.
3. Package body is approximately 14mm x 14mm x 1.4mm.
4. This package code is used to reference the package diagram.
5. All GND pins must be connected to ground supply.
GND
NC
I/O
7L
I/O
6L
I/O
5L
I/O
4L
I/O
3L
I/O
2L
GND
I/O1
L
I/O
0L
Vcc
GND
I/O
0R
I/O
1R
I/O
2R
Vcc
I/O
3R
I/O
4R
I/O
5R
I/O
6R
I/O
7R
NC
NC
NC
3
6.42
IDT7008S/L
High-Speed 64K x 8 Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Pin Configurations
(1,2,3)
(con't)
63
61
60
58
55
54
51
48
46
45
42
11
66
A
7R
64
A
9R
A
10R
62
A
12R
59
A
15R
56
49
NC
50
NC
SEM
R
47
OE
R
44
GND
43
40
NC
10
67
A
4R
65
A
6R
A
8R
A
11R
A
14R
57
CE
1R
53
CE
0R
52
R/W
R
GND
41
NC
I/O
6R
39
09
69
A
3R
68
A
5R
A
13R
GND
NC
I/O
7R
38
I/O
5R
37
08
72
A
1R
71
A
2R
73
33
I/O
4R
35
I/O
3R
34
07
BUSY
R
75
INT
R
70
M/S
74
I/O
0R
IDT7008G
G84-3
(4)
84-Pin PGA
Top View
(5)
32
I/O
2R
31
I/O
1R
36
06
BUSY
L
76
A
0R
77
GND
78
GND
28
29
Vcc
30
Vcc
05
04
INT
L
79
80
NC
A
0L
GND
I/O1
L
26
I/O
0L
27
A
1L
81
83
A
2L
7
11
12
I/O
3L
23
I/O
2L
25
03
82
A
3L
1
A
5L
2
5
8
A
13L
10
Vcc
14
NC
17
20
I/O
6L
22
I/O
4L
24
02
84
A
4L
3
A
7L
4
A
8L
6
A
11L
9
A
14L
15
NC
CE
0L
13
R/W
L
16
GND
18
I/O
7L
19
I/O
5L
21
01
A
6L
A
A
9L
B
A
10L
C
A
12L
D
A
15L
E
CE
1L
F
NC
G
SEM
L
H
OE
L
J
GND
K
NC
L
,
3198 drw 04
INDEX
NOTES:
1. All Vcc pins must be connected to power supply.
2. All GND pins must be connected to ground supply.
3. Package body is approximately 1.12 in x 1.12 in x .16 in.
4. This package code is used to reference the package diagram.
5. This text does not indicate orientation of the actual part marking.
Pin Names
Left Port
CE
0L
, CE
1L
R/W
L
OE
L
A
0L
- A
15L
I/O
0L
- I/O
7L
SEM
L
INT
L
BUSY
L
Right Port
CE
0R
, CE
1R
R/W
R
OE
R
A
0R
- A
15R
I/O
0R
- I/O
7R
SEM
R
INT
R
BUSY
R
M/S
V
CC
GND
Names
Chip Enables
Read/Write Enable
Output Enable
Address
Data Input/Output
Semaphore Enable
Interrupt Flag
Busy Flag
Master or Slave Select
Power
Ground
3198 tbl 01
4
IDT7008S/L
High-Speed 64K x 8 Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Truth Table I: Chip Enable
(1)
CE
CE
0
V
IL
L
< 0.2V
V
IH
X
H
>V
CC
-0.2V
X
CE
1
V
IH
>V
CC
-0.2V
X
V
IL
X
<0.2V
Port Selected (TTL Active)
Port Selected (CMOS Active)
Port Deselected (TTL Inactive)
Port Deselected (TTL Inactive)
Port Deselected (CMOS Inactive)
Port Deselected (CMOS Inactive)
3198 tbl 02
Mode
NOTES:
1. Chip Enable references are shown above with the actual
CE
0
and CE
1
levels,
CE
is a reference only.
Truth Table II: Non-Contention Read/Write Control
Inputs
(1)
CE
(2)
H
L
L
X
R/W
X
L
H
X
OE
X
X
L
H
SEM
H
H
H
X
Outputs
I/O
0-7
High-Z
DATA
IN
DATA
OUT
High-Z
Deselected: Power-Down
Write to memory
Read memory
Outputs Disabled
3198 tbl 03
Mode
NOTES:
1. A
0L
– A
15L
≠
A
0R
– A
15R.
2. Refer to Chip Enable Truth Table.
Truth Table III: Semaphore Read/Write Control
(1)
Inputs
CE
(2)
H
H
L
R/W
H
OE
L
X
X
SEM
L
L
L
Outputs
I/O
0-7
DATA
OUT
DATA
IN
______
Mode
Read Semaphore Flag Data Out
Write I/O
0
into Semaphore Flag
Not Allowed
3198 tbl 04
↑
X
NOTES:
1. There are eight semaphore flags written to via I/O
0
and read from all the I/Os (I/O
0
-I/O
7
). These eight semaphore flags are addressed by A
0
-A
2
.
2. Refer to Chip Enable Truth Table.
5
6.42
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