HIGH SPEED 36K (4K X 9)
SYNCHRONOUS
DUAL-PORT RAM
Features
x
IDT70914S
x
x
x
High-speed clock-to-data output times
– Military: 20/25ns (max.)
– Commercial: 12/15/20ns (max.)
Low-power operation
– IDT70914S
Active: 850 mW (typ.)
Standby: 50 mW (typ.)
Architecture based on Dual-Port RAM cells
– Allows full simultaneous access from both ports
Synchronous operation
– 4ns setup to clock, 1ns hold on all control, data, and address
inputs
– Data input, address, and control registers
x
x
x
x
x
x
x
– Fast 12ns clock to data out
– Self-timed write allows fast cycle times
– 16ns cycle times, 60MHz operation
TTL-compatible, single 5V (+ 10%) power supply
Clock Enable feature
Guaranteed data output hold times
Available in 68-pin PLCC, and 80-pin TQFP
Military product compliant to MIL-PRF-38535 QML
Industrial temperature range (-40°C to +85°C) is available
for selected speeds.
Recommended for replacement of IDT7099 (4K x 9) if
separate 9th bit data control signals are not required.
Functional Block Diagram
REGISTER
REGISTER
I/O
0-8L
WRITE
LOGIC
MEMOR
MEMORY
Y
ARRAY
ARRAY
WRITE
LOGIC
I/O
0-8R
SENSE
SENSE
AMPS DECODER DECODER AMPS
OE
L
CLK
L
CLKEN
L
Self-
timed
Write
Logic
REG
en
REG
en
OE
R
CLK
R
CLKEN
R
Self-
timed
Write
Logic
R/W
L
CE
L
REG
REG
R/W
R
CE
R
3490 drw 01
A
0L
-A
11L
A
0R
-A
11R
JANUARY 2001
1
©2000 Integrated Device Technology, Inc.
DSC-3490/6
IDT70914S
High-Speed 36K (4K x 9) Synchronous Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Description
The IDT70914 is a high-speed 4K x 9 bit synchronous Dual-Port RAM.
The memory array is based on Dual-Port memory cells to allow
simultaneous access from both ports. Registers on control, data, and
address inputs provide low set-up and hold times. The timing latitude
provided by this approach allow systems to be designed with very short
cycle times. With an input data register, this device has been optimized for
applications having unidirectional data flow or bi-directional data flow in
bursts.
The IDT70914 utilizes a 9-bit wide data path to allow for parity at the
user's option. This feature is especially useful in data communication
applications where it is necessary to use a parity bit for transmission/
reception error checking.
Fabricated using IDT’s CMOS high-performance technology, these
Dual-Ports typically operate on only 850mW of power at maximum high-
speed clock-to-data output times as fast as 12ns. An automatic power
down feature, controlled by
CE,
permits the on-chip circuitry of each port
to enter a very low standby power mode.
The IDT70914 is packaged in a 68-pin PLCC, and an 80-pin TQFP.
Military grade product is manufactured in compliance with the latest revision
of MIL-PRF-38535 QML, making it ideally suited for military temperature
applications demanding the highest level of performance and reliability.
Pin Configurations
(1,2,3)
A
5L
A
4L
A
3L
A
2L
A
1L
A
0L
CLKEN
L
CLK
L
CLK
R
CLKEN
R
A
0R
A
1R
A
2R
A
3R
A
4R
A
5R
A
6R
9
8
7 6
5
4
3
2
1
68 67 66 65 64 63 62 61
60
59
58
57
56
55
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
INDEX
A
6L
A
7L
A
8L
A
9L
A
10L
A
11L
OE
L
N/C
V
CC
R/W
L
N/C
N/C
CE
L
GND
I/O
8L
I/O
7L
I/O
6L
IDT70914J
J68-1
(4)
68-Pin PLCC
Top View
(5)
54
53
52
51
50
49
48
47
46
45
26
44
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
A
7R
A
8R
A
9R
A
10R
A
11R
OE
R
N/C
GND
GND
R/W
R
N/C
N/C
CE
R
GND
I/O
8R
I/O
7R
I/O
6R
,
3490 drw 03
NOTES:
1. All V
CC
pins must be connected to power supply.
2. All ground pins must be connected to ground supply.
3. J68-1 package body is approximately .95 in x .95 in x .17 in.
4. This package code is used to reference the package diagram.
5. This text does not indicate orientation of the actual part-marking.
N/C
I/O
5L
V
CC
I/O
4L
I/O
3L
I/O
2L
I/O
1L
I/O
0L
GND
GND
I/O
0R
I/O
1R
I/O
2R
I/O
3R
V
CC
I/O
4R
I/O
5R
6.42
2
IDT70914S
High-Speed 36K (4K x 9) Synchronous Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Pin Configuration
(1,2,3)
(con't.)
Reference
N/C
A
6L
A
7L
A
8L
A
9L
A
10L
A
11L
N/C
OE
L
N/C
V
CC
R/W
L
N/C
N/C
CE
L
GND
I/O
8L
I/O
7L
I/O
6L
N/C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
N/C
N/C
A
5L
A
4L
A
3L
A
2L
A
1L
A
0L
CLKEN
L
CLK
L
CLK
R
CLKEN
R
A
0R
A
1R
A
2R
A
3R
A
4R
A
5R
A
6R
N/C
IDT70914PF
PN80-1
(4)
80-Pin TQFP
Top View
(5)
N/C
A
7R
A
8R
A
9R
A
10R
A
1
1R
N/C
OE
R
N/C
GND
GND
R/W
R
N/C
N/C
CE
R
GND
I/O
8R
I/O
7R
I/O
6R
N/C
,
3490 drw 04
NOTES:
1. All V
CC
pins must be connected to power supply.
2. All ground pins must be connected to ground supply.
3. PN80-1 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.
N/C
N/C
I/O
5L
V
CC
I/O
4L
I/O
3L
I/O
2L
I/O
1L
I/O
0L
GND
GND
I/O
0R
I/O
1R
I/O
2R
I/O
3R
V
CC
I/O
4R
I/O
5R
N/C
N/C
3
6.42
IDT70914S
High-Speed 36K (4K x 9) Synchronous Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
Absolute Maximum Ratings
(1)
Symbol
V
TERM
(2)
Rating
Terminal Voltage
with Respect
to GND
Terminal Voltage
Temperature
Under Bias
Storage
Temperature
DC Output
Current
Commercial
& Industrial
-0.5 to +7.0
Military
-0.5 to +7.0
Unit
Maximum Operating Temperature
and Supply Voltage
(1,2)
Grade
Ambient
Temperature
-55
O
C to+125
O
C
0
O
C to +70
O
C
-40
O
C to +85
O
C
GND
0V
0V
0V
V
CC
5.0V
+
10%
5.0V
+
10%
5.0V
+
10%
3490 tbl 02
V
Military
-0.5 to V
CC
-55 to +125
-65 to +150
50
-0.5 to V
CC
-65 to +135
-65 to +150
50
V
o
V
TERM
(2)
T
BIAS
T
STG
I
OUT
Commercial
Industrial
C
C
o
NOTES:
1. This is the parameter T
A
. This is the "instant on" casae temperature.
2. Industrial temperature: for specific speeds, packages and powers contact your
mA
3490 tbl 01
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%.
Recommended DC Operating
Conditions
Symbol
V
CC
GND
Parameter
Supply Voltage
Ground
Input High Voltage
Input Low Voltage
Min.
4.5
0
2.2
-0.5
(1)
Typ.
5.0
0
____
Max.
5.5
0
6.0
(2)
0.8
Unit
V
V
V
V
3490 tbl 03
Capacitance
(T
A
= +25°C, f = 1.0MH
z
)
Symbol
C
IN
C
OUT
Parameter
Input Capacitance
Output Capacitance
TQFP Only
V
IH
V
IL
____
Conditions
V
IN
= 3dV
V
OUT
= 3dV
Max.
8
9
Unit
pF
pF
3490 tbl 04
NOTES:
1. V
IL
> -1.5V for pulse width less than 10ns.
2. V
TERM
must not exceed V
CC
+ 10%.
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.
DC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range
(V
CC
= 5.0V ± 10%)
70914S
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
= 5.5V, V
IN
= 0V to V
CC
CE
= V
IH
, V
OUT
= 0V to V
CC
I
OL
= +4mA
I
OH
= -4mA
Min.
___
Max.
10
10
0.4
___
Unit
µA
µA
V
V
3490 tbl 05
___
___
2.4
NOTE:
1. At V
CC
< 2.0V, input leakages are undefined
6.42
4
IDT70914S
High-Speed 36K (4K x 9) Synchronous Dual-Port Static RAM
Military, Industrial and Commercial Temperature Ranges
DC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range
(4,5)
(V
CC
= 5V ± 10%)
70914S12
Com 'l Only
Sym bol
I
CC
Param eter
Dynam ic Op e rating
Curre nt
(Bo th P o rts Ac tiv e )
Stand b y Curre nt
(Bo th Po rts - TTL
Le ve l Inp uts )
Stand b y Curre nt
(One P o rt - TTL
Le ve l Inp uts )
Full S tand b y
Curre nt (Bo th
P o rts - All CM OS
Le ve l Inp uts )
Full S tand b y
Curre nt (One
Po rt - All CM OS
Le ve l Inp uts )
Test Condition
CE
L
and
CE
R
= V
IL
,
Outp uts Dis ab le d
f = f
M A X
(1)
CE
L
and
CE
R
= V
IH
f = f
M A X
(1)
Version
COM 'L
M IL &
IND
COM 'L
M IL &
IND
COM 'L
M IL &
IND
COM 'L
M IL &
IND
COM 'L
M IL &
IND
Typ.
(2)
190
____
70914S15
Com 'l Only
Typ.
(2)
180
____
Max.
310
____
Max.
300
____
Unit
mA
I
S B 1
95
____
150
____
90
____
140
____
mA
I
S B 2
CE
"A "
= V
IL
and
CE
"B "
= V
IH
(3)
Ac tiv e P o rt Outp uts
Disab le d , f=f
M A X
(1)
Bo th P o rts
CE
R
and
CE
L
> V
CC
- 0.2V
V
IN
> V
CC
- 0.2V o r
V
IN
< 0.2V , f = 0
(2)
CE
"A "
< 0.2V and
CE
"B "
> V
CC
- 0.2V
(3)
V
IN
> V
CC
- 0.2V o r
V
IN
< 0.2V, Ac tiv e Po rt
Outp uts Dis ab le d
f = f
M A X
(1)
170
____
220
____
160
____
210
____
mA
I
S B 3
10
____
15
____
10
____
15
____
mA
I
S B 4
165
____
210
____
155
____
200
____
mA
3 490 tb l 06 a
70914S20
Com 'l &
Military
Sym bol
I
CC
Param eter
Dynam ic Op e rating
Curre nt
(Bo th P o rts Ac tiv e )
Stand b y Curre nt
(Bo th Po rts - TTL
Le ve l Inp uts )
Stand b y Curre nt
(One P o rt - TTL
Le ve l Inp uts )
Full S tand b y
Curre nt (Bo th
P o rts - All CM OS
Le ve l Inp uts )
Full S tand b y
Curre nt (One
Po rt - All CM OS
Le ve l Inp uts )
Test Condition
CE
L
and
CE
R
= V
IL
,
Outp uts Dis ab le d
f = f
M A X
(1)
CE
L
and
CE
R
= V
IH
f = f
M A X
(1)
Version
COM 'L
M IL &
IND
COM 'L
M IL &
IND
COM 'L
M IL &
IND
COM 'L
M IL &
IND
COM 'L
M IL &
IND
Typ.
(2)
170
170
85
85
150
150
10
10
145
145
Max.
290
310
130
140
200
210
15
20
190
200
70914S25
Military
Only
Typ.
(2)
____
Max.
____
Unit
mA
160
____
290
____
I
S B 1
mA
80
____
130
____
I
S B 2
CE
"A "
= V
IL
and
CE
"B "
= V
IH
(3)
Ac tiv e P o rt Outp uts
Disab le d , f=f
M A X
(1)
Bo th P o rts
CE
R
and
CE
L
> V
CC
- 0.2V
V
IN
> V
CC
- 0.2V o r
V
IN
< 0.2V , f = 0
(2)
CE
"A "
< 0.2V and
CE
"B "
> V
CC
- 0.2V
(3)
V
IN
> V
CC
- 0.2V o r
V
IN
< 0.2V, Ac tiv e Po rt
Outp uts Dis ab le d
f = f
M A X
(1)
mA
140
____
200
____
I
S B 3
mA
10
____
20
____
I
S B 4
mA
135
190
3490 tb l 0 6b
NOTES:
1. At 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, T
A
= 25°C for Typ, and are not production tested. I
CC DC
= 150mA (Typ).
5. Industrial temperature: for specific speeds, packages and powers contact your sales office.
5
6.42
MicroPython开源版块
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
