2000 Integrated Device Technology, Inc.
MAY 2000
DSC 3199/7
1
Functional Block Diagram
Features
x
x
x
x
x
True Dual-Ported memory cells which allow simultaneous
access of the same memory location
x
x
x
x
x
High-speed access
Military: 25/35/55ns (max)
Industrial: 25ns (max.)
Commercial: 20/25/35/55ns (max.)
x
x
x
x
x
Low-power operation
IDT7027S
Active: 750mW (typ.)
Standby: 5mW (typ.)
IDT7027L
Active: 750mW (typ.)
Standby: 1mW (typ.)
x
x
x
x
x
Separate upper-byte and lower-byte control for bus
matching capability.
x
x
x
x
x
Dual chip enables allow for depth expansion without
HIGH-SPEED
32K x 16 DUAL-PORT
STATIC RAM
IDT7027S/L
external logic
x
x
x
x
x
IDT7027 easily expands data bus width to 32 bits or more
using the Master/Slave select when cascading more than
one device
x
x
x
x
x
M/
S = V
IH
for
BUSY output flag on Master,
M/
S = V
IL
for
BUSY input on Slave
x
x
x
x
x
Busy and Interrupt Flags
x
x
x
x
x
On-chip port arbitration logic
x
x
x
x
x
Full on-chip hardware support of semaphore signaling
between ports
x
x
x
x
x
Fully asynchronous operation from either port
x
x
x
x
x
TTL-compatible, single 5V (10%) power supply
x
x
x
x
x
Available in 100-pin Thin Quad Flatpack (TQFP) and 108-pin
Ceramic Pin Grid Array (PGA)
x
x
x
x
x
Industrial temperature range (40C to +85C) is available
for selected speeds
NOTES:
1.
BUSY is an input as a Slave (M/S=V
IL
) and an output as a Master (M/
S=V
IH
).
2.
BUSY and INT are non-tri-state totem-pole outputs (push-pull).
I/O
Control
Address
Decoder
32Kx16
MEMORY
ARRAY
7027
ARBITRATION
INTERRUPT
SEMAPHORE
LOGIC
CE
0L
OE
L
R/
W
L
A
14L
A
0L
A
14L
A
0L
SEM
L
INT
L
(2)
BUSY
L
(1,2)
LB
L
CE
0L
OE
L
UB
L
I/O
Control
Address
Decoder
CE
0R
OE
R
R/
W
R
A
14R
A
0R
A
14R
A
0R
SEM
R
INT
R
(2)
BUSY
R
(1,2)
LB
R
R/
W
R
OE
R
UB
R
M/
S
(2)
CE
1L
CE
0R
CE
1R
3199 drw 01
I/O
CE
1R
CE
1L
8-15L
I/O
I/O
0-7R
I/O
8-15R
0-7L
R/
W
L
.
6.42
IDT7027S/L
High-Speed 32K x 16 Dual-Port Static RAM Military, Industrial and Commercial Temperature Ranges
2
Description
The IDT7027 is a high-speed 32K x 16 Dual-Port Static RAM,
designed to be used as a stand-alone 512K-bit Dual-Port RAM or as a
combination MASTER/SLAVE Dual-Port RAM for 32-bit-or-more word
systems. Using the IDT MASTER/SLAVE Dual-Port RAM approach in 32-
bit or wider memory system applications results in full-speed, error-free
operation without the need for additional discrete logic.
The 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
) permits 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 IDT7027 is
packaged in a 100-pin Thin Quad Flatpack (TQFP) and a 108-pin ceramic
Pin Grid Array (PGA).
Military grade product is manufactured in compliance with the
latest revision of MIL-PRF-38535 QML, making it ideally suited to
military temperature applications demanding the highest level of
performance and reliability.
Pin Configurations
(1,2,3)
NOTES:
1. All V
CC
pins must be connected to power supply.
2. All GND pins must be connected to ground supply.
3. Package body is approximately 14mm x 14mm x 1.4mm.
4. This package code is used to reference the package diagram.
5. This text does not indicate orientation of the actual part-marking.
INDEX
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
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
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
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
IDT7027PF
PN100-1(4)
100-Pin TQFP
Top View(5)
GND
OE
R
R/
W
R
SEM
R
CE
1R
CE
0R
NC
NC
GND
A
12R
A
13R
A
11R
A
10R
A
9R
A
14R
NC
I/O
10R
I/O
11R
I/O
12R
I/O
13R
I/O
14R
I/O
15R
GND
UB
R
LB
R
3199 drw 02
I/O
15L
GND
OE
L
R/
W
L
SEM
L
CE
1L
CE
0L
Vcc
NC
A
14L
A
13L
NC
NC
A
12L
A
11L
A
10L
A
9L
I/O
10L
I/O
11L
I/O
12L
I/O
13L
I/O
14L
UB
L
LB
L
GND
I
/
O
5
R
I
/
O
4
R
I
/
O
3
R
I
/
O
2
R
I
/
O
0
R
I
/
O
0
L
G
N
D
I
/
O
2
L
I
/
O
4
L
I
/
O
5
L
I
/
O
6
L
I
/
O
7
L
I
/
O
3
L
I
/
O
1
R
I
/
O
7
R
N
C
I
/
O
8
R
I
/
O
9
R
I
/
O
8
L
I
/
O
9
L
I
/
O
6
R
A
7
R
A
8
L
A
7
L
A
6
R
A
5
R
A
4
R
A
3
R
A
2
R
A
1
R
A
0
R
I
N
T
R
B
U
S
Y
R
M
/
S
B
U
S
Y
L
I
N
T
L
N
C
A
0
L
A
2
L
A
3
L
A
5
L
A
6
L
A
1
L
A
4
L
A
8
R
G
N
D
V
c
c
I
/
O
1
L
V
c
c
G
N
D
.
6.42
IDT7027S/L
High-Speed 32K x 16 Dual-Port Static RAM Military, Industrial and Commercial Temperature Ranges
3
Pin Configurations
(1,2,3)
(con't.)
Pin Names
NOTES:
1. All V
CC
pins must be connected to power supply.
2. All GND pins must be connected to ground supply.
3. Package body is approximately 1.21 in x 1.21 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.
Left Port
Right Port
Names
CE
0L
, CE
1L
CE
0R
, CE
1R
Chip Enables
R/W
L
R/W
R
Read/Write Enable
OE
L
OE
R
Output Enable
A
0L
- A
14L
A
0R
- A
14R
Address
I/O
0L
- I/O
15L
I/O
0R
- I/O
15R
Data Input/Output
SEM
L
SEM
R
Semaphore Enable
UB
L
UB
R
Upper Byte Select
LB
L
LB
R
Lower Byte Select
INT
L
INT
R
Interrupt Flag
BUSY
L
BUSY
R
Busy Flag
M/S
Master or Slave Select
V
CC
Power
GND
Ground
3199 tbl 01
3199 drw 03
80
77
74
72
69
68
65
63
60
83
78
76
73
70
67
64
61
59
84
56
86
87
88
90
91
92
94
95
97
96
100
99
103
101
105
104
2
1
5
4
7
8
10
12
13
17
16
21
19
25
22
28
24
32
31
34
35
37
39
40
44
43
48
46
52
49
55
51
IDT7027G
G108-1
(4)
108-Pin PGA
Top View
(5)
A
B
C
D
E
F
G
H
J
K
L
M
81
57
54
53
82
79
75
71
66
62
58
50
33
36
38
41
42
45
47
3
6
9
11
14
15
18
20
23
29
30
26
27
85
89
93
98
102
106
107
108
12
11
10
09
08
07
06
05
04
03
02
01
INDEX
GND
OE
R
R/
W
R
SEM
R
CE
1R
CE
0R
NC
NC
GND
A
12R
A
13R
A
11R
A
10R
A
9R
GND
OE
L
R/
W
L
SEM
L
CE
1L
CE
0L
Vcc
NC
A
14L
A
13L
NC
NC
A
12L
A
11L
A
10L
A
9L
I/O
6R
I/O
5R
I/O
4R
I/O
3R
I/O
2R
I/O
0R
GND
Vcc
I/O
0L
I/O
1L
GND
I/O
2L
I/O
4L
I/O
5L
I/O
6L
I/O
7
L
I/O
3L
I/O
1R
I/O
7R
NC
I/O
8R
I/O
9R
I/O
8L
I/O
9L
Vcc
A
6R
A
5R
A
4R
A
3R
A
2R
A
1R
A
0R
INT
R
BUSY
R
M/
S
BUSY
L
INT
L
NC
A
0L
GND
A
2L
A
3L
A
5L
A
6L
A
1L
A
4L
A
8R
A
7R
A
8L
A
7L
A
14R
NC
I/O
10R
I/O
11R
I/O
12R
I/O
13R
I/O
14R
I/O
15R
I/O
10L
I/O
11L
I/O
12L
I/O
13L
I/O
14L
GND
UB
R
LB
R
UB
L
LB
L
GND
NC
NC
NC
NC
NC
NC
NC
NC
I/O
15L
.
6.42
IDT7027S/L
High-Speed 32K x 16 Dual-Port Static RAM Military, Industrial and Commercial Temperature Ranges
4
NOTES:
1. Chip Enable references are shown above with the actual
CE
0
and CE
1
levels,
CE is a reference only.
2. Port "A" and "B" references are located where
CE is used.
3. "H" = V
IH
and "L" = V
IL
.
Truth Table I Chip Enable
Truth Table II Non-Contention Read/Write Control
NOTES:
1. A
0L
-- A
14L
A
0R
-- A
14R.
2. Refer to Chip Enable Truth Table.
Truth Table III Semaphore Read/Write Control
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
15
). These eight semaphore flags are addressed by A
0
-A
2
.
2. Refer to Chip Enable Truth Table.
CE
CE
0
CE
1
Mode
L
V
IL
V
IH
P o rt S e le c te d (TTL A ctive )
< 0.2V
> V
CC
-0.2V
P o rt S e le c te d (CM O S A ctive )
H
V
IH
X
P o rt De s e le c te d (TTL Inac tiv e )
X
V
IL
P o rt De s e le c te d (TTL Inac tiv e )
> V
CC
-0.2V
X
P o rt De s e le c te d (CM O S Inac tiv e )
X
< 0.2V
P o rt De s e le c te d (CM O S Inac tiv e )
3199 tbl 02
Inputs
(1)
Outputs
Mode
CE
(2)
R/
W
OE
UB
LB
SEM
I/O
8-15
I/O
0-7
H
X
X
X
X
H
High-Z
High-Z
Deselected: Power-Down
X
X
X
H
H
H
High-Z
High-Z
Both Bytes Deselected
L
L
X
L
H
H
DATA
IN
High-Z
Write to Upper Byte Only
L
L
X
H
L
H
High-Z
DATA
IN
Write to Lower Byte Only
L
L
X
L
L
H
DATA
IN
DATA
IN
Write to Both Bytes
L
H
L
L
H
H
DATA
OUT
High-Z
Read Upper Byte Only
L
H
L
H
L
H
High-Z
DATA
OUT
Read Lower Byte Only
L
H
L
L
L
H
DATA
OUT
DATA
OUT
Read Both Bytes
X
X
H
X
X
X
High-Z
High-Z
Outputs Disabled
3199 tbl 03
Inputs
(1)
Outputs
Mode
CE
(2)
R/
W
OE
UB
LB
SEM
I/O
8-15
I/O
0-7
H
H
L
X
X
L
DATA
OUT
DATA
OUT
Read Data in Semaphore Flag
X
H
L
H
H
L
DATA
OUT
DATA
OUT
Read Data in Semaphore Flag
H
X
X
X
L
DATA
IN
DATA
IN
Write I/O
0
into Semaphore Flag
X
X
H
H
L
DATA
IN
DATA
IN
Write I/O
0
into Semaphore Flag
L
X
X
L
X
L
______
______
Not Allowed
L
X
X
X
L
L
______
______
Not Allowed
3199 tbl 04
6.42
IDT7027S/L
High-Speed 32K x 16 Dual-Port Static RAM Military, Industrial and Commercial Temperature Ranges
5
Capacitance
(1)
(T
A
= +25C, f = 1.0mhz) TQFP ONLY
DC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range
(V
CC
= 5.0V 10%)
NOTE:
1. At Vcc
<
2.0V, input leakages are undefined.
Recommended DC Operating
Conditions
Maximum Operating
Temperature and Supply Voltage
(1)
Absolute Maximum Ratings
(1,3)
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may
cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any other conditions above those
indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended periods may affect
reliability.
2. V
TERM
must not exceed Vcc + 10% for more than 25% of the cycle time or 10ns
maximum, and is limited to < 20mA for the period of V
TERM
> Vcc + 10%.
NOTES:
1. This parameter is determined by device characterization but is not production
tested.
2. 3dV represents the interpolated capacitance when the input and output signals
switch from 0V to 3V or from 3V to 0V.
NOTES:
1. V
IL
> -1.5V for pulse width less than 10ns.
2. V
TERM
must not exceed Vcc + 10%.
NOTES:
1. This is the parameter T
A
. This is the "instant on" case temperature.
2. Industrial temperature: for other speeds packages and powers, contact your
sales office.
Symbol
Rating
Commercial
& Industrial
Military
Unit
V
TERM
(2)
Terminal Voltage
with Respect
to GND
-0.5 to +7.0
-0.5 to +7.0
V
T
BIAS
Temperature
Under Bias
-55 to +125
-65 to +135
o
C
T
STG
Storage
Temperature
-65 to +150
-65 to +150
o
C
I
OUT
DC Output
Current
50
50
mA
3199 tbl 05
Grade
Ambient
Temperature
GND
Vcc
Military
-55
O
C to+125
O
C
0V
5.0V
+
10%
Commercial
0
O
C to +70
O
C
0V
5.0V
+
10%
Industrial
-40
O
C to +85
O
C
0V
5.0V
+
10%
3199 tbl 06
Symbol
Parameter
Conditions
(2)
Max.
Unit
C
IN
Input Capacitance
V
IN
= 3dV
9
pF
C
OUT
Output
Capacitance
V
OUT
= 3dV
10
pF
3199 tbl 08
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
CC
Supply Voltage
4.5
5.0
5.5
V
GND
Ground
0
0
0
V
V
IH
Input High Voltage
2.2
____
6.0
(2)
V
V
IL
Input Low Voltage
-0.5
(1)
____
0.8
V
3199 tbl 07
Symbol
Parameter
Test Conditions
7027S
7027L
Unit
Min.
Max.
Min.
Max.
|I
LI
|
Input Leakage Current
(1)
V
CC
= 5.5V, V
IN
= 0V to V
CC
___
10
___
5
A
|I
LO
|
Output Leakage Current
CE = V
IH
, V
OUT
= 0V to V
CC
___
10
___
5
A
V
OL
Output Low Voltage
I
OL
= 4mA
___
0.4
___
0.4
V
V
OH
Output High Voltage
I
OH
= -4mA
2.4
___
2.4
___
V
3199 tbl 09
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