DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD444008
4M-BIT CMOS FAST SRAM
512K-WORD BY 8-BIT
Description
The
µ
PD444008 is a high speed, low power, 4,194,304 bits (524,288 words by 8 bits) CMOS static RAM.
Operating supply voltage is 5.0 V
±
0.5 V.
The
µ
PD444008 is packaged in 36-pin PLASTIC SOJ.
Features
•
524,288 words by 8 bits organization
•
Fast access time : 8, 10, 12 ns (MAX.)
•
Output Enable input for easy application
•
Single +5.0 V power supply
Ordering Information
Part number
Package
Access time
ns (MAX.)
Supply current mA (MAX.)
At operating
200
180
170
At standby
10
µ
PD444008LE-8
µ
PD444008LE-10
µ
PD444008LE-12
36-pin PLASTIC SOJ
(10.16 mm (400))
8
10
12
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. M14428EJ5V0DS00 (5th edition)
Date Published May 2002 NS CP(K)
Printed in Japan
The mark
shows major revised points.
©
1999
µ
PD444008
Pin Configuration (Marking Side)
/××× indicates active low signal.
36-pin PLASTIC SOJ (10.16 mm (400))
A0
A1
A2
A3
A4
/CS
I/O1
I/O2
V
CC
GND
I/O3
I/O4
/WE
A5
A6
A7
A8
A9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
NC
A18
A17
A16
A15
/OE
I/O8
I/O7
GND
V
CC
I/O6
I/O5
A14
A13
A12
A11
A10
NC
A0 - A18
: Address Inputs
I/O1 - I/O8 : Data Inputs / Outputs
/CS
/WE
/OE
V
CC
GND
NC
: Chip Select
: Write Enable
: Output Enable
: Power supply
: Ground
: No connection
Remark
Refer to
Package Drawing
for the 1-pin index mark.
2
Data Sheet M14428EJ5V0DS
µ
PD444008
Block Diagram
Address buffer
A0
|
A18
Row decoder
Memory cell array
4,194,304 bits
I/O1
|
I/O8
Input data
controller
Sense amplifier /
Switching circuit
Column decoder
Output data
controller
Address buffer
/CS
/OE
/WE
V
CC
GND
Truth Table
/CS
H
L
L
L
/OE
/WE
Mode
Not selected
Read
Write
Output disable
I/O
High impedance
D
OUT
D
IN
High impedance
Supply current
I
SB
I
CC
×
L
×
H
L
H
×
H
Remark
×
: Don’t care
Data Sheet M14428EJ5V0DS
3
µ
PD444008
Electrical Specifications
Absolute Maximum Ratings
Parameter
Supply voltage
Input / Output voltage
Operating ambient temperature
Storage temperature
Symbol
V
CC
V
T
T
A
T
stg
Condition
Rating
–0.5
Note
to +7.0
–0.5
Note
to V
CC
+0.5
0 to 70
–55 to +125
Unit
V
V
°C
°C
Note
–2.0 V (MIN.) (pulse width : 2 ns)
Caution Exposing the device to stress above those listed in Absolute Maximum Rating could cause
permanent damage. The device is not meant to be operated under conditions outside the limits
described in the operational section of this specification. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Supply voltage
High level input voltage
Low level input voltage
Operating ambient temperature
Symbol
V
CC
V
IH
V
IL
T
A
Condition
MIN.
4.5
2.2
–0.5
Note
0
TYP.
5.0
MAX.
5.5
V
CC
+0.5
+0.8
70
Unit
V
V
V
°C
Note
–2.0 V (MIN.) (pulse width : 2 ns)
4
Data Sheet M14428EJ5V0DS
µ
PD444008
DC Characteristics (Recommended Operating Conditions Unless Otherwise Noted)
Parameter
Input leakage current
Output leakage current
Symbol
I
LI
I
LO
Test condition
V
IN
= 0 V to V
CC
V
I/O
= 0 V to V
CC
,
/CS = V
IH
or /OE = V
IH
or /WE = V
IL
Operating supply current
I
CC
/CS = V
IL
,
I
I/O
= 0 mA,
Minimum cycle time
Standby supply current
I
SB
I
SB1
Cycle time : 8 ns
Cycle time : 10 ns
Cycle time : 12 ns
200
180
170
40
10
mA
mA
MIN.
–2
–2
TYP.
MAX.
+2
+2
Unit
µ
A
µ
A
/CS = V
IH
, V
IN
= V
IH
or V
IL
/CS
≥
V
CC
– 0.2 V,
V
IN
≤
0.2 V or V
IN
≥
V
CC
– 0.2 V
High level output voltage
Low level output voltage
V
OH
V
OL
I
OH
= –4.0 mA
I
OL
= +8.0 mA
2.4
0.4
V
V
Remark
V
IN
: Input voltage
V
I/O
: Input / Output voltage
Capacitance (T
A
=
25
°
C, f = 1 MHz)
Parameter
Input capacitance
Input / Output capacitance
Symbol
C
IN
C
I/O
V
IN
= 0 V
V
I/O
= 0 V
Test condition
MIN.
TYP.
MAX.
6
8
Unit
pF
pF
Remarks 1.
V
IN
: Input voltage
V
I/O
: Input / Output voltage
2.
These parameters are periodically sampled and not 100% tested.
Data Sheet M14428EJ5V0DS
5
京公网安备 11010802033920号
EEWORLD
