NEC MC-4516DA727PFA-A75

DATA SHEET
MOS INTEGRATED CIRCUIT
MC-4516DA727
16M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE
REGISTERED TYPE
Description
The MC-4516DA727 is a 16,777,216 words by 72 bits synchronous dynamic RAM module on which 9 pieces of
128M SDRAM: µPD45128841 are assembled.
These modules provide high density and large quantities of memory in a small space without utilizing the surfacemounting technology on the printed circuit board.
Decoupling capacitors are mounted on power supply line for noise reduction.
Features
• 16,777,216 words by 72 bits organization (ECC type)
• Clock frequency and access time from CLK.
Part number
/CAS latency
MC-4516DA727EFA-A75
★
★
MC-4516DA727PFA-A75
Clock frequency
Access time from CLK
(MAX.)
(MAX.)
CL = 3
133 MHz
5.4 ns
CL = 2
100 MHz
6.0 ns
CL = 3
133 MHz
5.4 ns
CL = 2
100 MHz
6.0 ns
• Fully Synchronous Dynamic RAM, with all signals referenced to a positive clock edge
• Pulsed interface
• Possible to assert random column address in every cycle
• Quad internal banks controlled by BA0 and BA1 (Bank Select)
• Programmable burst-length
(1, 2, 4, 8 and Full Page)
• Programmable wrap sequence (Sequential / Interleave)
★
• Programmable /CAS latency (2, 3)
• Automatic precharge and controlled precharge
• CBR (Auto) refresh and self refresh
• All DQs have 10 Ω ±10 % of series resistor
• Single 3.3 V ±0.3 V power supply
• LVTTL compatible
• 4,096 refresh cycles/64 ms
• Burst termination by Burst Stop command and Precharge command
• 168-pin dual in-line memory module (Pin pitch = 1.27 mm)
• Registered type
• Serial PD
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. M14082EJ4V0DS00 (4th edition)
Date Published February 2000 NS CP(K)
Printed in Japan
The mark ★ shows major revised points.
©
1999
MC-4516DA727
Ordering Information
★
Part number
Clock frequency
MHz (MAX.)
MC-4516DA727EFA-A75
133 MHz
MC-4516DA727PFA-A75
2
Package
168-pin Dual In-line Memory Module
(Socket Type)
Edge connector: Gold plated
38.1 mm height
Data Sheet M14082EJ4V0DS00
Mounted devices
9 pieces of µPD45128841G5 (Rev. E)
(10.16mm (400) TSOP (II))
9 pieces of µPD45128841G5 (Rev. P)
(10.16mm (400) TSOP (II))
MC-4516DA727
Pin Configuration
168-pin Dual In-line Memory Module Socket Type (Edge connector: Gold plated)
85
86
87
88
89
90
91
92
93
94
VSS
DQ32
DQ33
DQ34
DQ35
Vcc
DQ36
DQ37
DQ38
DQ39
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
DQ40
VSS
DQ41
DQ42
DQ43
DQ44
DQ45
Vcc
DQ46
DQ47
CB4
CB5
VSS
NC
NC
Vcc
/CAS
DQMB4
DQMB5
NC
/RAS
VSS
A1
A3
A5
A7
A9
BA0 (A13)
A11
Vcc
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
CLK1
NC
VSS
CKE0
NC
DQMB6
DQMB7
NC
Vcc
NC
NC
CB6
CB7
VSS
DQ48
DQ49
DQ50
DQ51
Vcc
DQ52
NC
NC
REGE
VSS
DQ53
DQ54
DQ55
VSS
DQ56
DQ57
DQ58
DQ59
Vcc
DQ60
DQ61
DQ62
DQ63
VSS
CLK3
NC
SA0
SA1
SA2
Vcc
VSS
DQ0
DQ1
DQ2
DQ3
Vcc
DQ4
DQ5
DQ6
DQ7
1
2
3
4
5
6
7
8
9
10
DQ8
VSS
DQ9
DQ10
DQ11
DQ12
DQ13
Vcc
DQ14
DQ15
CB0
CB1
VSS
NC
NC
Vcc
/WE
DQMB0
DQMB1
/CS0
NC
VSS
A0
A2
A4
A6
A8
A10
BA1(A12)
Vcc
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Vcc
CLK0
VSS
NC
/CS2
DQMB2
DQMB3
NC
Vcc
NC
NC
CB2
CB3
VSS
DQ16
DQ17
DQ18
DQ19
Vcc
DQ20
NC
NC
NC
VSS
DQ21
DQ22
DQ23
VSS
DQ24
DQ25
DQ26
DQ27
Vcc
DQ28
DQ29
DQ30
DQ31
VSS
CLK2
NC
WP
SDA
SCL
Vcc
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
/xxx indicates active low signal.
A0 - A11
: Address Inputs
[Row: A0 - A11, Column: A0 - A9]
BA0 (A13), BA1 (A12) : SDRAM Bank Select
DQ0-DQ63, CB0-CB7: Data Inputs/Outputs
CLK0 - CLK3
: Clock Input
CKE0
: Clock Enable Input
WP
: Write Protect
/CS0, /CS2
: Chip Select Input
/RAS
: Row Address Strobe
/CAS
: Column Address Strobe
/WE
: Write Enable
DQMB0 - DQMB7
: DQ Mask Enable
SA0 - SA2
: Address Input for EEPROM
SDA
: Serial Data I/O for PD
SCL
: Clock Input for PD
VCC
: Power Supply
VSS
: Ground
REGE
: Register / Buffer Enable
NC
: No Connection
Data Sheet M14082EJ4V0DS00
3
MC-4516DA727
Block Diagram
/RCS0
RDQMB4
RDQMB0
30 pF
10 Ω
DQ 0
DQ 1
DQ 2
DQ 3
DQ 4
DQ 5
DQ 6
DQ 7
DQ 7 DQM
DQ 6
DQ 5
DQ 4
D0
DQ 3
DQ 2
DQ 1
DQ 0
/CS
DQ 7 DQM
DQ 6
DQ 5
DQ 4
D1
DQ 3
DQ 2
DQ 1
DQ 0
/CS
DQ 2 DQM
DQ 0
DQ 7
DQ 5
D2
DQ 3
DQ 1
DQ 6
DQ 4
/CS
DQ 7 DQM
/CS
RDQMB1
10 Ω
30 pF
DQ 32
DQ 33
DQ 34
DQ 35
DQ 36
DQ 37
DQ 38
DQ 39
DQ 0 DQM
DQ 1
DQ 2
DQ 3
D5
DQ 4
DQ 5
DQ 6
DQ 7
/CS
RDQMB5
10 Ω
15 pF
DQ 8
DQ 9
DQ 10
DQ 11
DQ 12
DQ 13
DQ 14
DQ 15
10 Ω
30 pF
/CS
DQ 0DQM
DQ 1
DQ 2
DQ 3
D6
DQ 4
DQ 5
DQ 6
DQ 7
DQ 40
DQ 41
DQ 42
DQ 43
DQ 44
DQ 45
DQ 46
DQ 47
D0 - D8,
Register1, Register2, PLL
VCC
C
D0 - D8,
Register1, Register2, PLL
V SS
SERIAL PD
10 Ω
15 pF
CB 0
CB 1
CB 2
CB 3
CB 4
CB 5
CB 6
CB 7
SDA
SCL
A0
A1
WP
A2
47 kΩ
SA0 SA1 SA2
/RCS2
RDQMB6
RDQMB2
10 Ω
30 pF
DQ 16
DQ 17
DQ 18
DQ 19
DQ 20
DQ 21
DQ 22
DQ 23
★
10 Ω
30 pF
DQ 6
DQ 5
DQ 4
DQ 3
DQ 2
DQ 1
DQ 0
DQ 48
DQ 49
DQ 50
DQ 51
DQ 52
DQ 53
DQ 54
DQ 55
D3
RDQMB3
10 Ω
/CS
DQ 0 DQM
DQ 1
DQ 2
DQ 3
D7
DQ 4
DQ 5
DQ 6
DQ 7
10 Ω
DQ 24
DQ 25
DQ 26
DQ 27
DQ 28
DQ 29
DQ 30
DQ 31
A0 - A9
10 Ω
CLK0
CLK : D0,D1,D5
/CS
DQ 56
DQ 57
DQ 58
DQ 59
DQ 60
DQ 61
DQ 62
DQ 63
PLL
DQ 0 DQM
DQ 1
DQ 2
DQ 3
D8
DQ 4
DQ 5
DQ 6
DQ 7
A0 - A9 : D0 - D8
/RAS
/RRAS
/RAS : D0 - D8
CKE0
/CAS
/RCAS
/CAS : D0 - D8
DQMB2, 3, 6, 7
/RWE
/WE : D0 - D8
Register1
/CS
A10, A11, BA0, BA1
Register2
/CS2
/LE
CLK : Register 1,
Register 2
RA10, RA11,
RBA0, RBA1
A10, A11,
BA0, BA1 : D0 - D8
RCKE0
CKE : D0 - D8
/RCS2
15 pF
/RCS0
/CS0
CLK : D4,D7,D8
RDQMB2, 3, 6, 7
RDQMB0, 1, 4, 5
DQMB0, 1, 4, 5
REGE
CLK : D2,D3,D6
10 Ω
30 pF
DQ 7 DQM
DQ 6
DQ 5
DQ 4
D4
DQ 3
DQ 2
DQ 1
DQ 0
RA0 - RA9
/WE
15 pF
/LE
VCC
10 kΩ
Remarks 1. The value of all resistors of DQs is 10 Ω.
2. D0 - D8: µPD45128841 (4M words × 8 bits × 4 banks)
3. REGE ≤ VIL: Buffer mode
REGE ≥ VIH: Register mode
4. Register: HD74ALVCF162834
PLL: HD74CDCF2510B, IDTCSP2510C
4
12 pF
RDQMB7
30 pF
★
CLK1 - CLK3
Data Sheet M14082EJ4V0DS00
MC-4516DA727
Electrical Specifications
• All voltages are referenced to VSS (GND).
• After power up, wait more than 1 ms and then, execute power on sequence and CBR (Auto) refresh before proper
device operation is achieved.
Absolute Maximum Ratings
Parameter
Symbol
Condition
Rating
Unit
Voltage on power supply pin relative to GND
VCC
–0.5 to +4.6
V
Voltage on input pin relative to GND
VT
–0.5 to +4.6
V
Short circuit output current
IO
50
mA
Power dissipation
PD
10
W
Operating ambient temperature
TA
0 to +70
°C
Storage temperature
Tstg
–55 to +125
°C
Caution
Exposing the device to stress above those listed in Absolute Maximum Ratings 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
Symbol
Condition
MIN.
TYP.
MAX.
Unit
3.3
3.6
V
Supply voltage
VCC
3.0
High level input voltage
VIH
2.0
VCC + 0.3
V
Low level input voltage
VIL
–0.3
+ 0.8
V
Operating ambient temperature
TA
0
70
°C
MAX.
Unit
pF
Capacitance (TA = 25 °C, f = 1 MHz)
Parameter
Input capacitance
Data input/output capacitance
Symbol
Test condition
MIN.
TYP.
CI1
A0 - A11, BA0 (A13), BA1 (A12), /RAS,
/CAS, /WE
4
10
CI2
CLK0
15
25
CI3
CKE0
4
10
CI4
/CS0, /CS2
4
10
CI5
DQMB0 - DQMB7
4
10
CI/O
DQ0 - DQ63, CB0 - CB7
6
13
Data Sheet M14082EJ4V0DS00
pF
5
MC-4516DA727
DC Characteristics (Recommended Operating Conditions unless otherwise noted)
Parameter
★
Operating current
Symbol
ICC1
★
Precharge standby current in
★
power down mode
Precharge standby current in
ICC2P
ICC2PS
ICC2N
non power down mode
power down mode
Active standby current in
ICC3P
ICC3PS
ICC3N
non power down mode
Operating current
★
(Burst mode)
★
CBR (Auto) Refresh current
MIN.
MAX.
Unit Notes
mA
Burst length = 1
/CAS latency = 2
-A75
1,300
tRC ≥ tRC (MIN.), IO = 0 mA
/CAS latency = 3
-A75
1,345
CKE ≤ VIL (MAX.), tCK = 15 ns
259
CKE ≤ VIL (MAX.), tCK = ∞
89
CKE ≥ VIH (MIN.), tCK = 15 ns, /CS ≥ VIH (MIN.),
430
1
mA
mA
CKE ≥ VIH (MIN.), tCK = ∞, Input signals are stable.
152
CKE ≤ VIL (MAX.), tCK = 15 ns
295
CKE ≤ VIL (MAX.), tCK = ∞
116
CKE ≥ VIH (MIN.), tCK = 15 ns, /CS ≥ VIH (MIN.),
520
mA
mA
Input signals are changed one time during 30 ns.
ICC3NS
★
Grade
Input signals are changed one time during 30 ns.
ICC2NS
Active standby current in
Test condition
ICC4
ICC5
CKE ≥ VIH (MIN.), tCK = ∞, Input signals are stable.
tCK ≥ tCK (MIN.), IO = 0 mA
tRC ≥ tRC (MIN.)
★
260
/CAS latency = 2
-A75
1,480
/CAS latency = 3
-A75
1,795
/CAS latency = 2
-A75
2,470
/CAS latency = 3
-A75
2,560
Self refresh current
ICC6
CKE ≤ 0.2 V
Input leakage current
II (L)
VI = 0 to 3.6 V, All other pins not under test = 0 V
Output leakage current
IO (L)
High level output voltage
Low level output voltage
mA
2
mA
3
268
mA
–10
+10
µA
DOUT is disabled, VO = 0 to 3.6 V
–1.5
+1.5
µA
VOH
IO = –4.0 mA
2.4
VOL
IO = +4.0 mA
V
0.4
V
Notes 1. ICC1 depends on output loading and cycle rates. Specified values are obtained with the output open. In
addition to this, ICC1 is measured on condition that addresses are changed only one time during tCK (MIN.).
2. ICC4 depends on output loading and cycle rates. Specified values are obtained with the output open. In
addition to this, ICC4 is measured on condition that addresses are changed only one time during tCK (MIN.).
3. ICC5 is measured on condition that addresses are changed only one time during tCK (MIN.).
6
Data Sheet M14082EJ4V0DS00
MC-4516DA727
AC Characteristics (Recommended Operating Conditions Unless Otherwise Noted)
★
Test Conditions
Parameter
AC high level input voltage / low level input voltage
Input timing measurement reference level
Transition time (Input rise and fall time)
Output timing measurement reference level
Value
Unit
2.4 / 0.4
V
1.4
V
1
ns
1.4
V
tCK
tCH
CLK
tCL
2.4 V
1.4 V
0.4 V
tSETUP tHOLD
Input
2.4 V
1.4 V
0.4 V
tAC
tOH
Output
Data Sheet M14082EJ4V0DS00
7
MC-4516DA727
Synchronous Characteristics
Parameter
Symbol
-A75
MIN.
Clock cycle time
★
Access time from CLK
★
MAX.
/CAS latency = 3
7.5
(133 MHz)
ns
/CAS latency = 2
tCK2
10
(100 MHz)
ns
/CAS latency = 3
tAC3
5.4
ns
1
/CAS latency = 2
tAC2
1
6.0
ns
Input clock frequency
50
133
MHz
Input CLK duty cycle
45
55
%
tOH
Data-out low-impedance time
2.7
ns
tLZ
0
/CAS latency = 3
tHZ3
3.0
5.4
ns
/CAS latency = 2
tHZ2
3.0
6.0
ns
Data-in setup time
tDS
1.5
ns
Data-in hold time
tDH
0.8
ns
Address setup time
tAS
1.5
ns
Address hold time
tAH
0.8
ns
CKE setup time
tCKS
1.5
ns
CKE hold time
tCKH
0.8
ns
CKE setup time (Power down exit)
tCKSP
1.5
ns
Command (/CS0, /CS2, /RAS, /CAS, /WE,
tCMS
1.5
ns
tCMH
0.8
ns
Data-out high-impedance time
★
ns
DQMB0 - DQMB7) setup time
Command (/CS0, /CS2, /RAS, /CAS, /WE,
DQMB0 - DQMB7) hold time
Note 1. Output load
Z = 50 Ω
Output
50 pF
Remark These specifications are applied to the monolithic device.
8
Note
tCK3
Data-out hold time
★
Unit
Data Sheet M14082EJ4V0DS00
1
MC-4516DA727
★
Asynchronous Characteristics
Parameter
Symbol
-A75
MIN.
Unit
MAX.
ACT to REF/ACT command period (operation)
tRC
67.5
ns
REF to REF/ACT command period (refresh)
tRC1
67.5
ns
ACT to PRE command period
tRAS
45
PRE to ACT command period
tRP
20
ns
Delay time ACT to READ/WRITE command
tRCD
20
ns
ACT(one) to ACT(another) command period
tRRD
15
ns
Data-in to PRE command period
tDPL
8
ns
120,000
ns
Data-in to ACT(REF) command
/CAS latency = 3
tDAL3
1CLK+22.5
ns
period (Auto precharge)
/CAS latency = 2
tDAL2
1CLK+20
ns
tRSC
2
CLK
tT
0.5
Mode register set cycle time
Transition time
Refresh time (4,096 refresh cycles)
tREF
Note
30
ns
64
ms
1
Note1. This device can satisfy the tDAL3 spec of 1CLK+20 ns for up to and including 125 MHz operation.
Data Sheet M14082EJ4V0DS00
9
MC-4516DA727
Serial PD
Byte No.
★
★
★
(1/2)
Hex
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Defines the number of bytes written into
serial PD memory
Function Described
80H
1
0
0
0
0
0
0
0
128 bytes
1
Total number of bytes of serial PD memory
08H
0
0
0
0
1
0
0
0
256 bytes
2
Fundamental memory type
04H
0
0
0
0
0
1
0
0
SDRAM
3
Number of rows
0CH
0
0
0
0
1
1
0
0
12 rows
4
Number of columns
0AH
0
0
0
0
1
0
1
0
10 columns
5
Number of banks
01H
0
0
0
0
0
0
0
1
1 bank
6
Data width
48H
0
1
0
0
1
0
0
0
72 bits
7
Data width (continued)
00H
0
0
0
0
0
0
0
0
0
8
Voltage interface
01H
0
0
0
0
0
0
0
1
LVTTL
9
CL = 3 Cycle time
-A75
75H
0
1
1
1
0
1
0
1
7.5 ns
10
CL = 3 Access time
-A75
54H
0
1
0
1
0
1
0
0
5.4 ns
11
DIMM configuration type
02H
0
0
0
0
0
0
1
0
ECC
12
Refresh rate/type
80H
1
0
0
0
0
0
0
0
Normal
13
SDRAM width
08H
0
0
0
0
1
0
0
0
x8
14
Error checking SDRAM width
08H
0
0
0
0
1
0
0
0
x8
15
Minimum clock delay
01H
0
0
0
0
0
0
0
1
1 clock
16
Burst length supported
8FH
1
0
0
0
1
1
1
1
1, 2, 4, 8, F
17
Number of banks on each SDRAM
04H
0
0
0
0
0
1
0
0
4 banks
18
/CAS latency supported
06H
0
0
0
0
0
1
1
0
2, 3
19
/CS latency supported
01H
0
0
0
0
0
0
0
1
0
20
/WE latency supported
01H
0
0
0
0
0
0
0
1
0
21
SDRAM module attributes
1FH
0
0
0
1
1
1
1
1
Registered
22
SDRAM device attributes : General
0EH
0
0
0
0
1
1
1
0
23
CL = 2 Cycle time
-A75
0AH
0
0
0
0
1
0
1
0
10 ns
24
CL = 2 Access time
-A75
6 ns
25-26
★
★
10
60H
0
1
1
0
0
0
0
0
00H
0
0
0
0
0
0
0
0
Notes
27
tRP(MIN.)
-A75
14H
0
0
0
1
0
1
0
0
20 ns
28
tRRD(MIN.)
-A75
0FH
0
0
0
0
1
1
1
1
15 ns
29
tRCD(MIN.)
-A75
14H
0
0
0
1
0
1
0
0
20 ns
30
tRAS(MIN.)
-A75
2DH
0
0
1
0
1
1
0
1
45 ns
31
Module bank density
20H
0
0
1
0
0
0
0
0
128M bytes
Data Sheet M14082EJ4V0DS00
MC-4516DA727
(2/2)
Byte No.
Function Described
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Notes
32
Command and address signal input
setup time
15H
0
0
0
1
0
1
0
1
1.5 ns
33
Command and address signal input hold
time
08H
0
0
0
0
1
0
0
0
0.8 ns
34
Data signal input setup time
15H
0
0
0
1
0
1
0
1
1.5 ns
35
Data signal input hold time
08H
0
0
0
0
1
0
0
0
0.8 ns
00H
0
0
0
0
0
0
0
0
36-61
★
Hex
62
SPD revision
63
Checksum for bytes 0 - 62
64-71
72
73-90
91
-A75
02H
0
0
0
0
0
0
1
0
3AH
0
0
1
1
1
0
1
0
64H
0
1
1
0
0
1
0
0
85H
1
0
0
0
0
1
0
1
JEDEC 2
Manufacture’s JEDEC ID code
Manufacturing location
Manufacture’s P/N
Revision Code
93-94
Manufacturing date
95-98
Assembly serial number
99-125
Mfg specific
126
Intel specification frequency
127
Intel specification /CAS
-A75
100 MHz
latency support
Timing Chart
Refer to the SYNCHRONOUS DRAM MODULE TIMING CHART Information (M13348E).
Data Sheet M14082EJ4V0DS00
11
MC-4516DA727
★
Package Drawing
168-PIN DUAL IN-LINE MODULE (SOCKET TYPE)
A (AREA B)
Z
Y
M1 (AREA B)
N
R
Q
M
L
A
M2 (AREA A)
S
B
G
U1
(OPTIONAL HOLES)
K
C
J
I
B
H
U2
E
T
D
A1 (AREA A)
ITEM
detail of A part
detail of B part
D2
W
V
P
X
D1
MILLIMETERS
A
133.35
A1
133.35±0.13
B
11.43
C
36.83
D
6.35
D1
2.0
D2
3.125
E
G
54.61
6.35
H
1.27 (T.P.)
I
J
8.89
24.495
K
L
42.18
17.78
M
38.1±0.13
M1
18.32
M2
19.78
N
4.0 MAX.
P
1.0
Q
R
R2.0
4.0±0.10
S
φ 3.0
T
1.27±0.1
U1
4.0 MIN.
U2
V
4.0 MIN.
W
0.2±0.15
1.0±0.05
X
Y
2.54±0.10
3.0 MIN.
Z
3.0 MIN.
M168S-50A113
12
Data Sheet M14082EJ4V0DS00
MC-4516DA727
[MEMO]
Data Sheet M14082EJ4V0DS00
13
MC-4516DA727
[MEMO]
14
Data Sheet M14082EJ4V0DS00
MC-4516DA727
NOTES FOR CMOS DEVICES
1
PRECAUTION AGAINST ESD FOR SEMICONDUCTORS
Note:
Strong electric field, when exposed to a MOS device, can cause destruction of the gate oxide and
ultimately degrade the device operation. Steps must be taken to stop generation of static electricity
as much as possible, and quickly dissipate it once, when it has occurred. Environmental control
must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using
insulators that easily build static electricity. Semiconductor devices must be stored and transported
in an anti-static container, static shielding bag or conductive material. All test and measurement
tools including work bench and floor should be grounded. The operator should be grounded using
wrist strap. Semiconductor devices must not be touched with bare hands. Similar precautions need
to be taken for PW boards with semiconductor devices on it.
2
HANDLING OF UNUSED INPUT PINS FOR CMOS
Note:
No connection for CMOS device inputs can be cause of malfunction. If no connection is provided
to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence
causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels
of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each unused
pin should be connected to V DD or GND with a resistor, if it is considered to have a possibility of
being an output pin. All handling related to the unused pins must be judged device by device and
related specifications governing the devices.
3
STATUS BEFORE INITIALIZATION OF MOS DEVICES
Note:
Power-on does not necessarily define initial status of MOS device. Production process of MOS
does not define the initial operation status of the device. Immediately after the power source is
turned ON, the devices with reset function have not yet been initialized. Hence, power-on does
not guarantee out-pin levels, I/O settings or contents of registers. Device is not initialized until the
reset signal is received. Reset operation must be executed immediately after power-on for devices
having reset function.
Data Sheet M14082EJ4V0DS00
15
MC-4516DA727
CAUTION FOR HANDLING MEMORY MODULES
When handling or inserting memory modules, be sure not to touch any components on the modules, such as
the memory IC, chip capacitors and chip resistors. It is necessary to avoid undue mechanical stress on these
components to prevent damaging them.
When re-packing memory modules, be sure the modules are NOT touching each other. Modules in contact
with other modules may cause excessive mechanical stress, which may damage the modules.
• The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
• No part of this document may be copied or reproduced in any form or by any means without the prior written
consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in
this document.
• NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property
rights of third parties by or arising from use of a device described herein or any other liability arising from use
of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights or other
intellectual property rights of NEC Corporation or others.
• Descriptions of circuits, software, and other related information in this document are provided for illustrative
purposes in semiconductor product operation and application examples. The incorporation of these circuits,
software, and information in the design of the customer's equipment shall be done under the full responsibility
of the customer. NEC Corporation assumes no responsibility for any losses incurred by the customer or third
parties arising from the use of these circuits, software, and information.
• While NEC Corporation has been making continuous effort to enhance the reliability of its semiconductor devices,
the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to persons or
property arising from a defect in an NEC semiconductor device, customers must incorporate sufficient safety
measures in its design, such as redundancy, fire-containment, and anti-failure features.
• NEC devices are classified into the following three quality grades:
"Standard", "Special", and "Specific". The Specific quality grade applies only to devices developed based on a
customer designated "quality assurance program" for a specific application. The recommended applications of
a device depend on its quality grade, as indicated below. Customers must check the quality grade of each device
before using it in a particular application.
Standard: Computers, office equipment, communications equipment, test and measurement equipment,
audio and visual equipment, home electronic appliances, machine tools, personal electronic
equipment and industrial robots
Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster
systems, anti-crime systems, safety equipment and medical equipment (not specifically designed
for life support)
Specific: Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems or medical equipment for life support, etc.
The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books.
If customers intend to use NEC devices for applications other than those specified for Standard quality grade,
they should contact an NEC sales representative in advance.
M7 98. 8