HIGH-SPEED 3.3V 32K x 16
SYNCHRONOUS
DUAL-PORT STATIC RAM
Features
x
x
PRELIMINARY
IDT70V927S/L
x
x
x
x
True Dual-Ported memory cells which allow simultaneous
access of the same memory location
High-speed clock to data access
Commercial: 25/30ns
Low-power operation
IDT70V927S
Active: 550mW (typ.)
Standby: 3.3mW (typ.)
IDT70V927L
Active: 550mW (typ.)
Standby: 660mW (typ.)
Flow-Through output mode
Counter enable and reset features
Dual chip enables allow for depth expansion without
additional logic
x
x
x
x
x
Full synchronous operation on both ports
4ns setup to clock and 1ns hold on all control, data, and
address inputs
Data input, address, and control registers
Fast 25ns clock to data out
Self-timed write allows fast cycle time
30ns cycle time, 33MHz operation
Separate upper-byte and lower-byte controls for
multiplexed bus and bus matching compatibility
LVTTL- compatible, single 3.3V (±0.3V) power supply
Industrial temperature range (-40°C to +85°C) is available
for selected speeds
Available in a 128 pin Thin Quad Flatpack
Functional Block Diagram
R/W
L
UB
L
CE
0L
CE
1L
LB
L
OE
L
R/W
R
UB
R
CE
0R
CE
1R
LB
R
OE
R
I/O
8L
-I/O
15L
I/O
0L
-I/O
7L
I/O
8R
-I/O
15R
I/O
Control
I/O
Control
I/O
0R
-I/O
7R
A
14L
A
0L
CLK
L
ADS
L
CNTEN
L
CNTRST
L
Counter/
Address
Reg.
MEMORY
ARRAY
Counter/
Address
Reg.
A
14R
A
0R
CLK
R
ADS
R
CNTEN
R
CNTRST
R
3749 drw 01
SEPTEMBER 1999
1
©1999 Integrated Device Technology, Inc.
DSC 3749/4
IDT70V927S/L
High-Speed 32K x 16 Synchronous Dual-Port Flow-Through Static RAM
Preliminary
Industrial and Commercial Temperature Ranges
The IDT70V927 is a high-speed 32K x 16 bit synchronous Dual-
Port RAM. The memory array utilizes Dual-Port memory cells to allow
simultaneous access of any address from both ports. Registers on
control, data, and address inputs provide minimal setup and hold
times. The timing latitude provided by this approach allows systems to
be designed with very short cycle times.
Description
With an input data register, the IDT70V927 has been optimized for
applications having unidirectional or bidirectional data flow in bursts.
An automatic power down feature, controlled by
CE
0
and CE
1,
permits
the on-chip circuitry of each port to enter a very low standby power
mode. Fabricated using IDTs CMOS high-performance technology,
these devices typically operate on only 550mW of power.
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
A
10R
A
11R
A
12R
A
13R
A
14R
N/C
N/C
N/C
LB
R
UB
R
CE
0R
CE
1R
CNTRST
R
V
CC
GND
R/W
R
OE
R
GND
GND
I/O
15R
I/O
14R
I/O
13R
I/O
12R
V
CC
V
CC
I/O
11R
Pin configurations
(1,2,3)
N/C
N/C
N/C
N/C
A
9R
A
8R
A
7R
A
6R
A
5R
A
4R
A
3R
A
2R
A
1R
A
0R
N/C
CNTEN
R
CLK
R
ADS
R
GND
V
CC
ADS
L
CLK
L
CNTEN
L
NC
A
0L
A
1L
A
2L
A
3L
A
4L
A
5L
A
6L
A
7L
A
8L
A
9L
N/C
N/C
N/C
N/C
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
31
32
33
34
35
36
37
38
70V927PRF
PK-128
(4)
128-Pin TQFP
Top View
(5)
102
101
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
75
74
73
72
71
70
69
68
67
66
65
I/O
10R
I/O
9R
GND
N/C
I/O
8R
N/C
N/C
I/O
7R
V
CC
I/O
6R
I/O
5R
I/O
4R
GND
I/O
3R
V
CC
I/O
2R
I/O
1R
I/O
0R
GND
V
CC
I/O
0L
I/O
1L
GND
I/O
2L
I/O
3L
GND
I/O
4L
I/O
5L
I/O
6L
I/O
7L
V
CC
N/C
N/C
I/O
8L
N/C
V
CC
I/O
9L
I/O
10L
3749 drw 02
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 14mm x 20mm 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.
A
10L
A
11L
A
12L
A
13L
A
14L
N/C
N/C
N/C
LB
L
UB
L
CE
0L
CE
1L
CNTRST
L
V
CC
GND
R/W
L
OE
L
V
CC
GND
I/O
15L
I/O
14L
I/O
13L
I/O
12L
V
CC
GND
I/O
11L
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
6.42
2
IDT70V927S/L
High-Speed 32K x 16 Synchronous Dual-Port Flow-Through Static RAM
Preliminary
Industrial and Commercial Temperature Ranges
Pin Names
Left Port
CE
0L
, CE
1L
R/
W
L
OE
L
A
0L
- A
14L
I/O
0L
- I/O
15L
CLK
L
UB
L
LB
L
ADS
L
CNTEN
L
CNTRST
L
Right Port
CE
0R
, CE
1R
R/
W
R
OE
R
A
0R
- A
14R
I/O
0R
- I/O
15R
CLK
R
UB
R
LB
R
ADS
R
CNTEN
R
CNTRST
R
V
CC
GND
Names
Chip Enables
Read/Write Enable
Output Enable
Address
Data Input/Output
Clock
Upper Byte Select
Lower Byte Select
Address Strobe
Counter Enable
Counter Reset
Power
Ground
3749 tbl 01
Truth Table IRead/Write and Enable Control
(1,2,3)
OE
X
X
X
X
X
X
L
L
L
H
CLK
↑
↑
↑
↑
↑
↑
↑
↑
↑
X
CE
0
H
X
L
L
L
L
L
L
L
L
CE
1
X
L
H
H
H
H
H
H
H
H
UB
X
X
H
L
H
L
L
H
L
L
LB
X
X
H
H
L
L
H
L
L
L
R/
W
X
X
X
L
L
L
H
H
H
X
Upper Byte
I/O
8-15
High-Z
High-Z
High-Z
D
IN
High-Z
D
IN
D
OUT
High-Z
D
OUT
High-Z
Lower Byte
I/O
0-7
High-Z
High-Z
High-Z
High-Z
D
IN
D
IN
High-Z
D
OUT
D
OUT
High-Z
Mode
DeselectedPower Down
DeselectedPower Down
Both Bytes Deselected
Write to Upper Byte Only
Write to Lower Byte Only
Write to Both Bytes
Read Upper Byte Only
Read Lower Byte Only
Read Both Bytes
Outputs Disabled
3749 tbl 02
NOTES:
1. "H" = V
IH,
"L" = V
IL,
"X" = Don't Care.
2.
ADS, CNTEN, CNTRST
= X.
3.
OE
is an asynchronous input signal.
6.42
3
IDT70V927S/L
High-Speed 32K x 16 Synchronous Dual-Port Flow-Through Static RAM
Preliminary
Industrial and Commercial Temperature Ranges
Truth Table IIAddress Counter Control
(1,2)
Address
X
An
X
X
Previous
Address
X
X
An
An
CLK
↑
↑
↑
↑
ADS
H
L
(3)
H
H
CNTEN
H
H
H
L
(4)
CNTRST
L
H
H
H
I/O
D
I/O
(0)
D
I/O
(n)
D
I/O
(n)
D
I/O
(n+1)
Mode
Counter Reset to Address 0
External Address Utilized
External Address BlockedCounter Disabled
Counter EnableInternal Address Generation
3749 tbl 03
NOTES:
1. "H" = V
IH,
"L" = V
IL,
"X" = Don't Care.
2.
CE
0
,
LB, UB,
and
OE
= V
IL
; CE
1
and R/W = V
IH
.
3.
ADS
is independent of all other signals including
CE
0
, CE
1
,
UB
and
LB.
4. The address counter advances if
CNTEN
= V
IL
on the rising edge of CLK, regardless of all other signals including
CE
0
, CE
1
,
UB
and
LB.
Recommended Operating
Recommended DC Operating
Temperature and Supply Voltage
(1,2)
Conditions
Grade
Commercial
Industrial
Ambient
Temperature
0
O
C to +70
O
C
-40
O
C to +85
O
C
GND
0V
0V
Vcc
3.3V
+
0.3V
3.3V
+
0.3V
3749 tbl 04
Symbol
V
CC
GND
V
IH
V
IL
Parameter
Supply Voltage
Ground
Input High Voltage
Input Low Voltage
Min.
3.0
0
2.2
-0.3
(2)
Typ.
3.3
0
____
____
Max.
3.6
0
V
CC
+ 0.3V
0.8
Unit
V
V
V
V
3749 tbl 05
NOTES:
1. This is the parameter T
A
.
2. Industrial temperature: for specific speeds, packages and powers contact your
sales office.
NOTES:
1. V
TERM
must not exceed V
cc
+ 0.3V.
2. V
IL
> -1.5V for pulse width less than 10ns.
Absolute Maximum Ratings
(1)
Symbol
V
TERM
(2)
Rating
Terminal Voltage
with Respect
to GND
Temperature
Under Bias
Storage
Temperature
DC Output
Current
Commercial
& Industrial
-0.5 to +4.6
Unit
V
Capacitance
(1)
(T
A
= +25°C, f = 1.0MH
z
)
Symbol
C
IN
C
OUT
(3)
Parameter
Input Capacitance
Output Capacitance
Conditions
(2)
V
IN
= 3dV
V
OUT
= 3dV
Max.
9
10
Unit
pF
pF
3749 tbl 07
T
BIAS
T
STG
I
OUT
-55 to +125
-55 to +125
50
o
C
C
o
NOTES:
1. These parameters are determined by device characterization, but are not produc-
tion tested.
2. 3dV references the interpolated capacitance when the input and output switch from
0V to 3V or from 3V to 0V.
3. C
OUT
also references C
I/O
.
mA
3749 tbl 06
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 V
cc
+ 0.3V for more than 25% of the cycle time or 10ns
maximum, and is limited to < 20mA for the period of V
TERM
> V
cc
+ 0.3V.
6.42
4
IDT70V927S/L
High-Speed 32K x 16 Synchronous Dual-Port Flow-Through Static RAM
Preliminary
Industrial and Commercial Temperature Ranges
DC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range
(V
CC
= 3.3V ± 0.3V)
70V927S
Symbol
|I
LI
|
|I
LO
|
V
OL
V
OH
Parameter
Input Leakage Current
(1)
Output Leakage Current
Output Low Voltage
Output High Voltage
Test Conditions
V
CC
= 3.3V, V
IN
= 0V to V
CC
CE
0
= V
IH
or CE
1
= V
IL
, V
OUT
= 0V to V
CC
I
OL
= +4mA
I
OH
= -4mA
Min.
___
___
___
70V927L
Min.
___
___
___
Max.
10
10
0.4
___
Max.
5
5
0.4
___
Unit
µA
µA
V
V
3749 tbl 08
2.4
2.4
NOTE:
1. At Vcc < 2.0V input leakages are undefined.
DC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range
(6,7)
(V
CC
= 3.3V ± 0.3V)
70V927X25
Com'l Only
Symbol
I
CC
Parameter
Dynamic Operating
Current
(Both Ports Active)
Test Condition
CE
L
and
CE
R
= V
IL
Outputs Open
f = f
MAX
(1)
Version
COM'L
IND
COM'L
IND
CE
"A"
= V
IL
and
CE
"B"
= V
IH
(3)
Active Port Outputs
Open, f=f
MAX
(1)
Both Ports
CE
R
and
CE
L
> V
CC
- 0.2V
V
IN
> V
CC
- 0.2V or
V
IN
< 0.2V, f = 0
(2)
CE
"A"
< 0.2V and
CE
"B"
> V
CC
- 0.2V
(5)
V
IN
> V
CC
- 0.2V or
V
IN
< 0.2V, Active Port
Outputs Open, f = f
MAX
(1)
COM'L
IND
COM'L
IND
COM'L
IND
S
L
S
L
S
L
S
L
S
L
S
L
S
L
S
L
S
L
S
L
Typ.
(4)
120
120
____
____
70V927X30
Com'l Only
Typ.
(4)
110
110
____
____
Max.
220
185
____
____
Max.
210
175
____
____
Unit
mA
I
S B1
Standby Current
(Both Ports - TTL
Level Inputs)
CE
L
=
CE
R
= V
IH
f = f
MAX
(1)
30
30
____
____
50
40
____
____
30
30
____
____
50
40
____
____
mA
I
S B2
Standby Current
(One Port - TTL
Level Inputs)
90
90
____
____
130
115
____
____
80
80
____
____
120
105
____
____
mA
I
S B3
Full Standby Current
(Both Ports -
CMOS Level Inputs)
1.0
0.2
____
____
5
3
____
____
1.0
0.2
____
____
5
3
____
____
mA
I
S B4
Full Standby Current
(One Port -
CMOS Level Inputs)
80
80
____
____
125
110
____
____
70
70
____
____
115
100
____
____
mA
NOTES:
1. At f = f
MAX
, address and control lines (except Output Enable) are cycling at the maximum frequency clock cycle of 1/t
CYC
, using "AC TEST CONDITIONS" at input levels of
GND to 3V.
2. f = 0 means no address, clock, or control lines change. Applies only to input at CMOS level standby.
3. Port "A" may be either left or right port. Port "B" is the opposite from port "A".
4. Vcc = 3.3V, T
A
= 25°C for Typ, and are not production tested. I
CC DC
(f=0) = 90mA (Typ).
5.
CE
X
= V
IL
means
CE
0X
= V
IL
and CE
1X
= V
IH
CE
X
= V
IH
means
CE
0X
= V
IH
or CE
1X
= V
IL
CE
X
< 0.2V means
CE
0X
< 0.2V and CE
1X
> V
CC
- 0.2V
CE
X
> V
CC
- 0.2V means
CE
0X
> V
CC
- 0.2V or CE
1X
< 0.2V
"X" represents "L" for left port or "R" for right port.
6. 'X' in part numbers indicate power rating (S or L).
7. Industrial temperature: for specific speeds, packages and powers contact your sales office.
3749 tbl 09
6.42
5
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