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2001 Integrated Device Technology, Inc.
AUGUST 2001
DSC-5644/1
1
.unctional Block Diagram
.eatures
x
True Dual-Ported memory cells which allow simultaneous
access of the same memory location
x
High-speed clock to data access
Commercial: 7.5/9/12ns (max.)
Industrial: 9ns (max)
x
Low-power operation
IDT709179L
Active: 1.2W (typ.)
Standby: 2.5mW (typ.)
x
Flow-Through or Pipelined output mode on either Port via
the
FT/PIPE pins
x
Counter enable and reset features
x
Dual chip enables allow for depth expansion without
additional logic
x
Full synchronous operation on both ports
4ns setup to clock and 0ns hold on all control, data, and
address inputs
Data input, address, and control registers
Fast 7.5ns clock to data out in the Pipelined output mode
Self-timed write allows fast cycle time
12ns cycle time, 83MHz operation in Pipelined output mode
x
TTL- compatible, single 5V (10%) power supply
x
Industrial temperature range (40C to +85C) is
available for selected speeds
x
Available in a 100-pin Thin Quad Flatpack (TQFP) package
HIGH-SPEED 32K x 9
SYNCHRONOUS PIPELINED
DUAL-PORT STATIC RAM
IDT709179L
0
1
0/1
1
0/1
0
R/
W
R
OE
R
CE
0R
CE
1R
FT
/PIPE
R
I/O
Control
MEMORY
ARRAY
Counter/
Address
Reg.
I/O
Control
5644 drw 01
A
14R
A
0R
CLK
R
ADS
R
CNTEN
R
CNTRST
R
A
0L
CLK
L
ADS
L
A
14L
CNTEN
L
CNTRST
L
Counter/
Address
Reg.
R/
W
L
CE
0L
OE
L
CE
1L
I/O
0L
- I/O
8L
I/O
0R
- I/O
8R
1
0/1
0
0
1
0/1
FT
/PIPE
L
PRELIMINARY
6.42
IDT709179L
High-Speed 32K x 9 Synchronous Pipelined Dual-Port Static RAM Industrial and Commercial Temperature Ranges
2
Preliminary
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
IDT709179PF
PN100-1
(4)
100-Pin TQFP
Top View
(5)
NC
GND
FT
/PIPE
R
OE
R
R/
W
R
CNTRST
R
CE
1R
CE
0R
NC
NC
GND
NC
A
12R
A
13R
A
11R
A
10R
A
9R
A
8R
A
7R
NC
NC
A
14R
NC
NC
NC
5644 drw 02
NC
NC
FT
/PIPE
L
OE
L
R/
W
L
CNTRST
L
CE
1L
CE
0L
NC
NC
NC
V
CC
NC
NC
A
14L
A
13L
A
8L
A
7L
NC
NC
NC
A
12L
A
11L
A
10L
A
9L
N
C
N
C
I
/
O
6
R
I
/
O
5
R
I
/
O
4
R
I
/
O
3
R
V
C
C
I
/
O
2
R
I
/
O
0
R
G
N
D
V
C
C
I
/
O
0
L
I
/
O
1
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
G
N
D
I
/
O
8
L
I
/
O
8
R
N
C
A
6
R
A
5
R
A
4
R
A
3
R
A
2
R
A
1
R
A
0
R
C
N
T
E
N
R
C
L
K
R
A
D
S
R
A
D
S
L
C
L
K
L
C
N
T
E
N
L
A
0
L
G
N
D
A
2
L
A
3
L
A
5
L
A
6
L
N
C
N
C
A
1
L
A
4
L
G
N
D
,
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.
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.
Description
The IDT709179 is a high-speed 32K x 9 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.
With an input data register, the IDT709179 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 IDT's CMOS high-performance technology,
these devices typically operate on only 1.2W of power.
6.42
IDT709179L
High-Speed 32K x 9 Synchronous Pipelined Dual-Port Static RAM Industrial and Commercial Temperature Ranges
3
Preliminary
NOTES:
1. "H" = V
IH,
"L" = V
IL,
"X" = Don't Care.
2.
ADS, CNTEN, CNTRST = X.
3.
OE is an asynchronous input signal.
Truth Table IRead/Write and Enable Control
(1,2,3)
OE
CLK
CE
0
CE
1
R/
W
I/O
0-8
Mode
X
H
X
X
High-Z
Deselected--Power Down
X
X
L
X
High-Z
Deselected--Power Down
X
L
H
L
DATA
IN
Write
L
L
H
H
DATA
OUT
Read
H
X
L
H
X
High-Z
Outputs Disabled
5644 tbl 02
Pin Names
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
8L
I/O
0R
- I/O
8R
Data Input/Output
CLK
L
CLK
R
Clock
ADS
L
ADS
R
Address Strobe
CNTEN
L
CNTEN
R
Counter Enable
CNTRST
L
CNTRST
R
Counter Reset
FT/PIPE
L
FT/PIPE
R
Flow-Through/Pipeline
V
CC
Power
GND
Ground
5644 tbl 01
NOTES:
1. "H" = V
IH,
"L" = V
IL,
"X" = Don't Care.
2.
CE
0
and
OE = V
IL
; CE
1
and R/
W = V
IH
.
3. Outputs configured in Flow-Through Output mode: if outputs are in Pipelined mode the data out will be delayed by one cycle.
4.
ADS and CNTRST are independent of all other signals including CE
0
and CE
1
.
5. The address counter advances if
CNTEN = V
IL
on the rising edge of CLK, regardless of all other signals including
CE
0
and CE
1
.
6. While an external address is being loaded (
ADS = V
IL
), R/
W = V
IH
is recommended to ensure data is not written arbitrarily.
Truth Table IIAddress Counter Control
(1,2,6)
Address
Previous
Address
Addr
Used
CLK
(6
)
ADS
CNTEN
CNTRST
I/O
(3)
MODE
A n
X
A n
L
(4)
X
H
D
I/O
(n)
E xte rnal A d d re s s Use d
X
A n
A n + 1
H
L
(5)
H
D
I/O
(n+ 1)
Co unte r E nab le d -- Inte rnal A d d re s s g e ne ratio n
X
A n + 1
A n + 1
H
H
H
D
I/O
(n+ 1)
E xte rnal A d d re s s B lo ck e d -- Co unte r d is ab le d (A n + 1 re use d )
X
X
A o
X
X
L
(4)
D
I/O
(0)
Co unte r Re se t to A d d re ss 0
5644 tbl 03
6.42
IDT709179L
High-Speed 32K x 9 Synchronous Pipelined Dual-Port Static RAM Industrial and Commercial Temperature Ranges
4
Preliminary
Recommended Operating
Temperature and Supply Voltage
(1)
Recommended DC Operating
Conditions
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
+ 10% for more than 25% of the cycle time or 10ns
maximum, and is limited to < 20mA for the period of V
TERM
> V
cc
+ 10%.
Absolute Maximum Ratings
(1)
NOTES:
1. These parameters are determined by device characterization, but are not
production 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
.
Capacitance
(1)
(T
A
= +25C, f = 1.0MH
z
)
NOTES:
1. Industrial temperature: for specific speeds, packages and powers contact your
sales office.
2. This is the parameter T
A
. This is the "instant on" case temperature.
NOTES:
1. V
TERM
must not exceed V
cc
+ 10%.
2. V
IL
> -1.5V for pulse width less than 10ns.
DC Electrical Characteristics Over the Operating
Temperature Supply Voltage Range
(V
CC
= 5.0V 10%)
NOTE:
1.
At Vcc < 2.0V input leakages are undefined.
Grade
Ambient
Temperature
(2)
GND
Vcc
Commercial
0
O
C to +70
O
C
0V
5.0V
+
10%
Industrial
-40
O
C to +85
O
C
0V
5.0V
+
10%
5644 tbl 04
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
(1)
V
V
IL
Input Low Voltage
-0.5
(2)
____
0.8
V
5644 tbl 05
Symbol
Parameter
Conditions
(2)
Max.
Unit
C
IN
Input Capacitance
V
IN
= 3dV
9
pF
C
OUT
(3)
Output Capacitance
V
OUT
= 3dV
10
pF
5644 tbl 07
Symbol
Rating
Commercial
& Industrial
Unit
V
TERM
(2)
Terminal Voltage
with Respect
to GND
-0.5 to +7.0
V
T
BIAS
Temperature
Under Bias
-55 to +125
o
C
T
STG
Storage
Temperature
-65 to +150
o
C
I
OUT
DC Output
Current
50
mA
5644 tbl 06
Symbol
Parameter
Test Conditions
709179L
Unit
Min.
Max.
|I
LI
|
Input Leakage Current
(1)
V
CC
= 5.5V, V
IN
= 0V to V
CC
___
5
A
|I
LO
|
Output Leakage Current
CE
0
= V
IH
or CE
1
= V
IL
, V
OUT
= 0V to V
CC
___
5
A
V
OL
Output Low Voltage
I
OL
= +4mA
___
0.4
V
V
OH
Output High Voltage
I
OH
= -4mA
2.4
___
V
5644 tbl 08
6.42
IDT709179L
High-Speed 32K x 9 Synchronous Pipelined Dual-Port Static RAM Industrial and Commercial Temperature Ranges
5
Preliminary
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 = 5V, TA = 25C for Typ, and are not production tested. I
CC DC
(f=0)
= 150mA (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.
DC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range
(3)
(V
CC
= 5V 10%)
709179L7
Com'l Only
709179L9
Com'l
& Ind
709179L12
Com'l Only
Symbol
Parameter
Test Condition
Version
Typ.
(4)
Max.
Typ.
(4)
Max.
Typ.
(4)
Max.
Unit
I
CC
Dynamic Operating
Current
(Both Ports Active)
CE
L
and
CE
R
= V
IL
Outputs Disabled
f = f
MAX
(1)
COM'L
L
275
465
250
400
230
355
mA
IND
L
____
____
250
430
____
____
I
S B1
Standby Current
(Both Ports - TTL
Level Inputs)
CE
L
=
CE
R
= V
IH
f = f
MAX
(1)
COM'L
L
95
150
80
135
70
110
mA
IND
L
____
____
80
160
____
____
I
S B2
Standby Current
(One Port - TTL
Level Inputs)
CE
"A"
= V
IL
and
CE
"B"
= V
IH
(3)
Active Port Outputs
Disabled, f=f
MAX
(1)
COM'L
L
200
295
175
275
150
240
mA
IND
L
____
____
175
295
____
____
I
S B3
Full Standby Current
(Both Ports -
CMOS Level Inputs)
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)
COM'L
L
0.5
3.0
0.5
3.0
0.5
3.0
mA
IND
L
____
____
0.5
6.0
____
____
I
S B4
Full Standby Current
(One Port -
CMOS Level Inputs)
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
Outp uts Disabled , f = f
MAX
(1)
COM'L
L
190
290
170
270
140
225
mA
IND
L
____
____
170
290
____
____
5644 tbl 09