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Электронный компонент: CDP1822D

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6-11
Features
Low Operating Current
- V
DD
= 5V, Cycle Time 1
s . . . . . . . . . . . . . . . . . . 8mA
Industry Standard Pinout
Two Chip-Select Inputs-Simple Memory Expansion
Memory Retention for Standby Battery Voltage of 2V
Minimum
Output-Disable for Common I/O Systems
Three-State Data Output for Bus-Oriented Systems
Separate Data Inputs and Outputs
Description
The CDP1822 and CDP1822C are 256-word by 4-bit static
random-access memories designed for use in memory sys-
tems where high speed, low operating current, and simplicity
in use are desirable. The CDP1822 features high speed and
a wide operating voltage range. Both types have separate
data inputs and outputs and utilize single power supplies of
4V to 6.5V for the CDP1822C and 4V to 10.5V for the
CDP1822.
Two Chip-Select inputs are provided to simplify system
expansion. An Output Disable control provides Wire-OR
capability and is also useful in common Input/Output sys-
tems. The Output Disable input allows these RAMs to be
used in common data Input/Output systems by forcing the
output into a high-impedance state during a write operation
independent of the Chip-Select input condition. The output
assumes a high-impedance state when the Output Disable is
at high level or when the chip is deselected by CS1 and/or
CS2.
The high noise immunity of the CMOS technology is pre-
served in this design. For TTL interfacing at 5V operation,
excellent system noise margin is preserved by using an
external pull-up resistor at each input.
Pinout
CDP1822, CDP1822C
(PDIP, SBDIP)
TOP VIEW
Ordering Information
5V
10V
PACKAGE
TEMP. RANGE
PKG.
NO.
CDP1822CE
CDP1822E
PDIP
-40
o
C to +85
o
C
E22.4
CDP1822CEX CDP1822EX
Burn-In
E22.4
CDP1822CD
CDP1822D
SBDIP
-40
o
C to +85
o
C
D22.4A
CDP1822CDX
-
Burn-In
D22.4A
1
11
10
9
8
7
6
5
3
2
4
22
12
13
14
15
16
17
18
19
21
20
A2
A1
A0
A5
A6
A7
DI1
V
SS
DO1
DI2
A4
CS1
O. D.
CS2
R/W
DO4
DI4
DO3
DI3
DO2
A3
V
DD
OPERATIONAL MODES
MODE
INPUTS
OUTPUT
CHIP
SELECT
1
(CS
1
)
CHIP
SELECT
2
(CS
2
)
OUTPUT
DISABLE
(OD)
READ/
WRITE
(R/W)
Read
0
1
0
1
Read
Write
0
1
0
0
Data In
Write
0
1
1
0
High
Imped-
ance
Standby
1
X
X
X
High
Imped-
ance
Standby
X
0
X
X
High
Imped-
ance
Output
Disable
X
X
1
X
High
Imped-
ance
NOTE:
Logic 1 = High, Logic 0 = Low, X = Don't Care.
March 1997
CDP1822,
CDP1822C
256-Word x 4-Bit
LSI Static RAM
File Number
1074.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
6-12
Absolute Maximum Ratings
Thermal Information
DC Supply Voltage Range, (V
DD
)
(All Voltages Referenced to V
SS
Terminal)
CDP1822 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +11V
CDP1822C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V
Input Voltage Range, All Inputs . . . . . . . . . . . . . -0.5V to V
DD
+0.5V
DC Input Current, Any One Input
. . . . . . . . . . . . . . . . . . . . . . . . .
10mA
Thermal Resistance (Typical)
JA
(
o
C/W)
JC
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . .
75
N/A
SBDIP Package . . . . . . . . . . . . . . . . . .
80
21
Maximum Operating Temperature Range (T
A
)
Package Type D. . . . . . . . . . . . . . . . . . . . . . . . . .-55
o
C to +125
o
C
Package Type E . . . . . . . . . . . . . . . . . . . . . . . . . . .-40
o
C to +85
o
C
Maximum Junction Temperature
Ceramic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
o
C
Plastic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
o
C
Storage Temperature Range (T
STG
). . . . . . . . . . . .-65
o
C to +150
o
C
T
A
= -40
o
C to +60
o
C (Package Type E) . . . . . . . . . . . . . . 500mW
T
A
= +60
o
C to +85
o
C (Package Type E) . . . . . . Derate Linearly at
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12mW/
o
C to 200mW
Lead Temperature (During Soldering). . . . . . . . . . . . . . . . . . . 300
o
C
Recommended Operating Conditions
At T
A
= Full Package Temperature Range. For maximum reliability, operating conditions
should be selected so that operation is always within the following ranges:
PARAMETER
SYMBOL
LIMITS
UNITS
CDP1822
CDP1822C
MIN
MAX
MIN
MAX
DC Operating Voltage Range
4
10.5
4
6.5
V
Input Voltage Range
V
SS
V
DD
V
SS
V
DD
V
Static Electrical Specifications
At T
A
= -40
o
C to +85
o
C, Except as Noted
PARAMETER
SYMBOL
CONDITIONS
LIMITS
UNITS
V
O
(V)
V
IN
(V)
V
DD
(V)
CDP1822
CDP1822C
MIN
(NOTE 1)
TYP
MAX
MIN
(NOTE 1)
TYP
MAX
Quiescent Device
Current
I
DD
-
0, 5
5
-
-
500
-
-
500
A
-
0, 10
10
-
-
1000
-
-
-
A
Output Low (Sink)
Current
I
OL
0.4
0, 5
5
2
4
-
2
4
-
mA
0.5
0, 10
10
4.5
9
-
-
-
-
mA
Output High (Source)
Current
I
OH
4.6
0, 5
5
-1
-2
-
-1
-2
-
mA
9.5
0, 10
10
-2.2
-4.4
-
-
-
-
mA
Output Voltage
Low-Level
V
OL
-
0, 5
5
-
0
0.1
-
0
0.1
V
-
0, 10
10
-
0
0.1
-
-
-
V
Output Voltage
High-Level
V
OH
-
0, 5
5
4.9
5
-
4.9
5
-
V
-
0, 10
10
9.9
10
-
-
-
-
V
Input Low Voltage
V
IL
0.5, 4.5
-
5
-
-
1.5
-
-
1.5
V
0.5, 9.5
-
10
-
-
3
-
-
-
V
Input High Voltage
V
IH
0.5, 9.5
-
5
3.5
-
-
3.5
-
-
V
0.5, 9.5
-
10
7
-
-
-
-
-
V
Input Leakage Current
I
IN
-
0, 5
5
-
-
5
-
-
5
A
-
0, 10
10
-
-
10
-
-
-
A
CDP1822, CDP1822C
6-13
Operating Current
(Note 2)
I
DD1
-
0, 5
5
-
4
8
-
4
8
mA
-
0, 10
10
-
8
16
-
-
-
mA
Three-State Output
Leakage Current
I
OUT
0, 5
0, 5
5
-
-
5
-
-
5
A
0, 10
0, 10
10
-
-
10
-
-
-
A
Input Capacitance
C
IN
-
-
-
-
5
7.5
-
5
7.5
pF
Output Capacitance
C
OUT
-
-
-
-
10
15
-
10
15
pF
NOTES:
1. Typical values are for T
A
= +25
o
C and nominal V
DD
.
2. Outputs open circuited; Cycle time = 1
s.
Dynamic Electrical Specifications
At T
A
+ -40 to +85
o
C, V
DD
5%, Input t
R
, t
F
= 20ns, V
IH
= 0.7 V
DD
, V
IL
= 0.3 V
DD
,
C
L
= 100 pF
PARAMETER
TEST
CONDITIONS
LIMITS
UNITS
V
DD
(V)
CD1822
CDP1822C
(NOTE 1)
MIN
(NOTE 2)
TYP
MAX
(NOTE 1)
MIN
(NOTE 2)
TYP
MAX
Read Cycle Times (Figure 1)
Read Cycle
t
RC
5
450
-
-
450
-
-
ns
10
250
-
-
-
-
-
ns
Access from Address
t
AA
5
-
250
450
-
250
450
ns
10
-
150
250
-
-
-
ns
Output Valid from Chip-Select 1
t
DOA1
5
-
250
450
-
250
450
ns
10
-
150
250
-
-
-
ns
Output Valid from Chip-Select 2
t
DOA2
5
-
250
450
-
250
450
ns
10
-
150
250
-
-
-
ns
Output Valid from Output Disable t
DOA3
5
-
-
200
-
-
200
ns
10
-
-
110
-
-
-
ns
Output Hold from Chip-Select 1
t
DOH1
5
20
-
-
20
-
-
ns
10
20
-
-
-
-
-
ns
Output Hold from Chip-Select 2
t
DOH2
5
20
-
-
20
-
-
ns
10
20
-
-
-
-
-
ns
Output Hold from Output Disable t
DOH3
5
20
-
-
20
-
-
ns
10
20
-
-
-
-
-
ns
NOTES:
1. Time required by a limit device to allow for indicated function.
2. Typical values are for T
A
= 25
o
C and nominal V
DD
.
Static Electrical Specifications
At T
A
= -40
o
C to +85
o
C, Except as Noted (Continued)
PARAMETER
SYMBOL
CONDITIONS
LIMITS
UNITS
V
O
(V)
V
IN
(V)
V
DD
(V)
CDP1822
CDP1822C
MIN
(NOTE 1)
TYP
MAX
MIN
(NOTE 1)
TYP
MAX
CDP1822, CDP1822C
6-14
t
DOA1
t
DOA2
t
DOH1
t
RC
t
DOH3
t
AA
DATA OUT
VALID
HIGH
IMPEDANCE
HIGH
IMPEDANCE
CHIP-SELECT 1
A0 - A7
CHIP-SELECT 2
OUTPUT DISABLE
READ/WRITE
DATA OUT
t
DOH2
t
DOA3
FIGURE 1. READ CYCLE TIMING WAVEFORMS
Dynamic Electrical Specifications
At T
A
+ -40 to +85
o
C, V
DD
5%, Input t
R
, t
F
= 20ns, V
IH
= 0.7 V
DD
, V
IL
= 0.3 V
DD
,
C
L
= 100 pF.
PARAMETER
TEST
CONDITIONS
LIMITS
UNITS
CD1822
CDP1822C
V
DD
(V)
(NOTE 1)
MIN
(NOTE 2)
TYP
MAX
(NOTE 1)
MIN
(NOTE 2)
TYP
MAX
Read Cycle Times (Figure 2)
Write Cycle
t
WC
5
500
-
-
500
-
-
ns
10
300
-
-
-
-
-
ns
Address Setup
t
AS
5
200
-
-
200
-
-
ns
10
110
-
-
-
-
-
ns
Write Recovery
t
WR
5
50
-
-
50
-
-
ns
10
40
-
-
-
-
-
ns
Write Width
t
WRW
5
250
-
-
250
-
-
ns
10
150
-
-
-
-
-
ns
Input Data Setup Time
t
DS
5
250
-
-
250
-
-
ns
10
150
-
-
-
-
-
ns
Data Hold
t
DH
5
50
-
-
50
-
-
ns
10
40
-
-
-
-
-
ns
Chip-Select 1 Setup
t
CS1S
5
200
-
-
200
-
-
ns
10
110
-
-
-
-
-
ns
Chip-Select 2 Setup
t
CS2S
5
200
-
-
200
-
-
ns
10
110
-
-
-
-
-
ns
CDP1822, CDP1822C
6-15
Chip-Select 1 Hold
t
CS1H
5
0
-
-
0
-
-
ns
10
0
-
-
0
-
-
ns
Chip-Select 2 Hold
t
CS2H
5
0
-
-
0
-
-
ns
10
0
-
-
0
-
-
ns
Output Disable Set-Up
t
ODS
5
200
-
-
200
-
-
ns
10
110
-
-
-
-
-
ns
NOTES:
1. Time required by a limit device to allow for indicated function.
2. Typical values are for T
A
= 25
o
C and nominal V
DD
.
Dynamic Electrical Specifications
At T
A
+ -40 to +85
o
C, V
DD
5%, Input t
R
, t
F
= 20ns, V
IH
= 0.7 V
DD
, V
IL
= 0.3 V
DD
,
C
L
= 100 pF. (Continued)
PARAMETER
TEST
CONDITIONS
LIMITS
UNITS
CD1822
CDP1822C
V
DD
(V)
(NOTE 1)
MIN
(NOTE 2)
TYP
MAX
(NOTE 1)
MIN
(NOTE 2)
TYP
MAX
A0-A7
t
WC
t
CSIS
t
CSIH
t
CS2S
t
CS2H
t
ODS
t
DS
t
DH
t
WRW
t
AS
DON'T CARE
CHIP-SELECT 1
CHIP-SELECT 2
OUTPUT DISABLE
DI1-DI4
READ/WRITE
t
WR
DATA IN STABLE
NOTE: t
ODS
is required for common I/O operation only. For separate I/O operations, output disable is don't care.
FIGURE 2. WRITE CYCLE TIME WAVEFORMS
(NOTE)
CDP1822, CDP1822C