DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD4481161, 4481181, 4481321, 4481361
8M-BIT ZEROSB
TM
SRAM
FLOW THROUGH OPERATION
Description
The
µ
PD4481161 is a 524,288-word by 16-bit, the
µ
PD4481181 is a 524,288-word by 18-bit, the
µ
PD4481321 is a
262,144-word by 32-bit and the
µ
PD4481361 is a 262,144-word by 36-bit ZEROSB static RAM fabricated with
advanced CMOS technology using full CMOS six-transistor memory cell.
The
µ
PD4481161,
µ
PD4481181,
µ
PD4481321 and
µ
PD4481361 are optimized to eliminate dead cycles for read to
write, or write to read transitions. These ZEROSB static RAMs integrate unique synchronous peripheral circuitry, 2-bit
burst counter and output buffer as well as SRAM core. All input registers are controlled by a positive edge of the
single clock input (CLK).
The
µ
PD4481161,
µ
PD4481181,
µ
PD4481321 and
µ
PD4481361 are suitable for applications which require
synchronous operation, high speed, low voltage, high density and wide bit configuration, such as buffer memory.
ZZ has to be set LOW at the normal operation. When ZZ is set HIGH, the SRAM enters Power Down State
(“Sleep”). In the “Sleep” state, the SRAM internal state is preserved. When ZZ is set LOW again, the SRAM resumes
normal operation.
The
µ
PD4481161,
µ
PD4481181,
µ
PD4481321 and
µ
PD4481361 are packaged in 100-pin PLASTIC LQFP with a
1.4 mm package thickness for high density and low capacitive loading.
Features
•
Low voltage core supply : V
DD
= 3.3 ± 0.165 V (-A65, -A75, -A85, -A65Y, -A75Y, -A85Y)
V
DD
= 2.5 ± 0.125 V (-C75, -C85, -C75Y, -C85Y)
•
Synchronous operation
•
Operating temperature : T
A
= 0 to 70
°C
(-A65, -A75, -A85, -C75, -C85)
T
A
=
−40
to
+85 °C
(-A65Y, -A75Y, -A85Y, -C75Y, -C85Y)
•
100 percent bus utilization
•
Internally self-timed write control
•
Burst read / write : Interleaved burst and linear burst sequence
•
Fully registered inputs and outputs for flow through operation
•
All registers triggered off positive clock edge
•
3.3V or 2.5V LVTTL Compatible : All inputs and outputs
•
Fast clock access time : 6.5 ns (133 MHz), 7.5 ns (117 MHz), 8.5 ns (100 MHz)
•
Asynchronous output enable : /G
•
Burst sequence selectable : MODE
•
Sleep mode : ZZ (ZZ = Open or Low : Normal operation)
•
Separate byte write enable : /BW1 to /BW4 (
µ
PD4481321 and
µ
PD4481361)
/BW1 and /BW2 (
µ
PD4481161 and
µ
PD4481181)
•
Three chip enables for easy depth expansion
•
Common I/O using three state outputs
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 products and/or types are available in every country. Please check with an NEC Electronics
sales representative for availability and additional information.
Document No. M15561EJ3V0DS00 (3rd edition)
Date Published December 2002 NS CP(K)
Printed in Japan
The mark
shows major revised points.
2001
µ
PD4481161, 4481181, 4481321, 4481361
Ordering Information
Part number
Access
Time
ns
Clock
Frequency
MHz
133
117
100
133
117
100
133
117
100
133
117
100
117
100
117
100
117
100
117
100
2.5 ± 0.125
2.5 V LVTTL
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
Core Supply
Voltage
V
3.3 ± 0.165
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
I/O Interface
Operating
Temperature
°C
0 to 70
100-pin PLASTIC
LQFP (14 x 20)
Package
(1/2)
µ
PD4481161GF-A65
µ
PD4481161GF-A75
µ
PD4481161GF-A85
µ
PD4481181GF-A65
µ
PD4481181GF-A75
µ
PD4481181GF-A85
µ
PD4481321GF-A65
µ
PD4481321GF-A75
µ
PD4481321GF-A85
µ
PD4481361GF-A65
µ
PD4481361GF-A75
µ
PD4481361GF-A85
µ
PD4481161GF-C75
µ
PD4481161GF-C85
µ
PD4481181GF-C75
µ
PD4481181GF-C85
µ
PD4481321GF-C75
µ
PD4481321GF-C85
µ
PD4481361GF-C75
µ
PD4481361GF-C85
6.5
7.5
8.5
6.5
7.5
8.5
6.5
7.5
8.5
6.5
7.5
8.5
7.5
8.5
7.5
8.5
7.5
8.5
7.5
8.5
Note
Although 2.5V LVTTL interface can also be used, a performance becomes equivalent to -A75 (117 MHz).
2
Data Sheet M15561EJ3V0DS
µ
PD4481161, 4481181, 4481321, 4481361
(2/2)
Part number
Access
Time
ns
Clock
Frequency
MHz
133
117
100
133
117
100
133
117
100
133
117
100
117
100
117
100
117
100
117
100
2.5 ± 0.125
2.5 V LVTTL
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
Core Supply
Voltage
V
3.3 ± 0.165
3.3 V LVTTL
Note
3.3 V or 2.5 V LVTTL
I/O Interface
Operating
Temperature
°C
−40
to
+85
100-pin PLASTIC
LQFP (14 x 20)
Package
µ
PD4481161GF-A65Y
µ
PD4481161GF-A75Y
µ
PD4481161GF-A85Y
µ
PD4481181GF-A65Y
µ
PD4481181GF-A75Y
µ
PD4481181GF-A85Y
µ
PD4481321GF-A65Y
µ
PD4481321GF-A75Y
µ
PD4481321GF-A85Y
µ
PD4481361GF-A65Y
µ
PD4481361GF-A75Y
µ
PD4481361GF-A85Y
µ
PD4481161GF-C75Y
µ
PD4481161GF-C85Y
µ
PD4481181GF-C75Y
µ
PD4481181GF-C85Y
µ
PD4481321GF-C75Y
µ
PD4481321GF-C85Y
µ
PD4481361GF-C75Y
µ
PD4481361GF-C85Y
6.5
7.5
8.5
6.5
7.5
8.5
6.5
7.5
8.5
6.5
7.5
8.5
7.5
8.5
7.5
8.5
7.5
8.5
7.5
8.5
Note
Although 2.5V LVTTL interface can also be used, a performance becomes equivalent to -A75Y (117 MHz).
Data Sheet M15561EJ3V0DS
3
µ
PD4481161, 4481181, 4481321, 4481361
Pin Configurations
/××× indicates active low signal.
100-pin PLASTIC LQFP (14
×
20)
[
µ
PD4481161GF,
µ
PD4481181GF]
Marking Side
/BW2
/BW1
/CKE
/CE2
ADV
CE2
CLK
/WE
A17
V
DD
V
SS
/CE
NC
NC
NC
A6
A7
A8
A9
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
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
NC
NC
NC
V
DD
Q
V
SS
Q
NC
NC
I/O9
I/O10
V
SS
Q
V
DD
Q
I/O11
I/O12
V
SS
V
DD
V
DD
V
SS
I/O13
I/O14
V
DD
Q
V
SS
Q
I/O15
I/O16
I/OP2, NC
NC
V
SS
Q
V
DD
Q
NC
NC
NC
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
A18
NC
NC
V
DD
Q
V
SS
Q
NC
I/OP1, NC
I/O8
I/O7
V
SS
Q
V
DD
Q
I/O6
I/O5
V
SS
V
SS
V
DD
ZZ
I/O4
I/O3
V
DD
Q
V
SS
Q
I/O2
I/O1
NC
NC
V
SS
Q
V
DD
Q
NC
NC
NC
MODE
A5
A4
A3
A2
A1
A0
NC
NC
V
SS
A10
A11
/G
A12
A13
A14
A15
Remark
Refer to
Package Drawing
for the 1-pin index mark.
4
Data Sheet M15561EJ3V0DS
A16
NC
V
DD
NC
µ
PD4481161, 4481181, 4481321, 4481361
Pin Identifications
[
µ
PD4481161GF,
µ
PD4481181GF]
Symbol
A0 to A18
Pin No.
37, 36, 35, 34, 33, 32, 100, 99, 82, 81,
44, 45, 46, 47, 48, 49, 50, 83, 80
I/O1 to I/O16
58, 59, 62, 63, 68, 69, 72, 73, 8, 9, 12, 13,
18, 19, 22, 23
I/OP1, NC
Note
I/OP2, NC
Note
ADV
/CE, CE2, /CE2
/WE
/BW1, /BW2
/G
CLK
/CKE
MODE
74
24
85
98, 97, 92
88
93, 94
86
89
87
31
Synchronous Data In,
Synchronous / Asynchronous Data Out
Synchronous Data In (Parity),
Synchronous / Asynchronous Data Out (Parity)
Synchronous Address Load / Advance Input
Synchronous Chip Enable Input
Synchronous Write Enable Input
Synchronous Byte Write Enable Input
Asynchronous Output Enable Input
Clock Input
Synchronous Clock Enable Input
Asynchronous Burst Sequence Select Input
Have to tied to V
DD
or V
SS
during normal operation
ZZ
V
DD
V
SS
V
DD
Q
V
SS
Q
NC
64
15, 16, 41, 65, 91
14, 17, 40, 66, 67, 90
4, 11, 20, 27, 54, 61, 70, 77
5, 10, 21, 26, 55, 60, 71, 76
1, 2, 3, 6, 7, 25, 28, 29, 30, 38, 39, 42, 43,
51, 52, 53, 56, 57, 75, 78, 79, 84, 95, 96
Asynchronous Power Down State Input
Power Supply
Ground
Output Buffer Power Supply
Output Buffer Ground
No Connection
Description
Synchronous Address Input
Note
NC (No Connection) is used in the
µ
PD4481161GF.
I/OP1 and I/OP2 are used in the
µ
PD4481181GF.
Data Sheet M15561EJ3V0DS
5
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