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512MB Registered DDR SDRAM DIMM
DATA SHEET
EBD51RC4AKFA (64M words ×
Description
The EBD51RC4AKFA is a 64M words × 72 bits, 1 rank
Double Data Rate (DDR) SDRAM Module, mounting 18
pieces of DDR SDRAM sealed in TSOP package.
Read and write operations are performed at the cross
points of the CK and the /CK. This high-speed data
transfer is realized by the 2-bit prefetch-pipelined
architecture. Data strobe (DQS) both for read and
write are available for high speed and reliable data bus
design. By setting extended mode register, the on-chip
Delay Locked Loop (DLL) can be set enable or disable.
This module provides high density mounting without
utilizing surface mount technology. Decoupling
capacitors are mounted beside each TSOP on the
module board.
× 72 bits, 1 Rank)
××
Features
• 184-pin socket type dual in line memory module
(DIMM)
PCB height: 30.48mm
Lead pitch: 1.27mm
• 2.5V power supply
• Data rate: 333Mbps/266Mbps (max.)
• 2.5 V (SSTL_2 compatible) I/O
• Double Data Rate architecture; two data transfers per
clock cycle
• Bi-directional, data strobe (DQS) is transmitted
/received with data, to be used in capturing data at
the receiver
• Data inputs and outputs are synchronized with DQS
• 4 internal banks for concurrent operation
(Component)
• DQS is edge aligned with data for READs; center
aligned with data for WRITEs
• Differential clock inputs (CK and /CK)
• DLL aligns DQ and DQS transitions with CK
transitions
• Commands entered on each positive CK edge; data
referenced to both edges of DQS
• Auto precharge option for each burst access
• Programmable burst length: 2, 4, 8
• Programmable /CAS latency (CL): 2, 2.5
• Refresh cycles: (8192 refresh cycles /64ms)
7.8µs maximum average periodic refresh interval
• 2 variations of refresh
Auto refresh
Self refresh
• 1 piece of PLL clock driver, 2 pieces of register
drivers and 1 piece of serial EEPROM (2k bits
EEPROM) for Presence Detect (PD)
Document No. E0377E20 (Ver. 2.0)
Date Published January 2004 (K) Japan
URL: http://www.elpida.com
Elpida Memory,Inc. 2003-2004
EBD51RC4AKFA
Ordering Information
Part number
EBD51RC4AKFA-6B 333 DDR333B (2.5-3-3) 184-pin DIMM Gold EDD2504AKTA-6B
EBD51RC4AKFA-7A 266 DDR266A (2-3-3) EDD2504AKTA-6B, -7A
EBD51RC4AKFA-7B DDR266B (2.5-3-3) EDD2504AKTA-6B, -7A, -7B
Notes: 1. Module /CAS latency = component CL + 1.
Pin Configurations
Pin No. Pin name Pin No. Pin name Pin No. Pin name Pin No. Pin name
1 VREF 47 DQS8 93 VSS 139 VSS
2 DQ0 48 A0 94 DQ4 140 DM8/DQS17
3 VSS 49 CB2 95 DQ5 141 A10
4 DQ1 50 VSS 96 VDD 142 CB6
5 DQS0 51 CB3 97 DM0/DQS9 143 VDD
6 DQ2 52 BA1 98 DQ6 144 CB7
7 VDD 53 DQ32 99 DQ7 145 VSS
8 DQ3 54 VDD 100 VSS 146 DQ36
9 NC 55 DQ33 101 NC 147 DQ37
10 /RESET 56 DQS4 102 NC 148 VDD
11 VSS 57 DQ34 103 NC 149 DM4/DQS13
12 DQ8 58 VSS 104 VDD 150 DQ38
13 DQ9 59 BA0 105 DQ12 151 DQ39
14 DQS1 60 DQ35 106 DQ13 152 VSS
15 VDD 61 DQ40 107 DM1/DQS10 153 DQ44
16 NC 62 VDD 108 VDD 154 /RAS
17 NC 63 /WE 109 DQ14 155 DQ45
18 VSS 64 DQ41 110 DQ15 156 VDD
19 DQ10 65 /CAS 111 NC 157 /CS0
20 DQ11 66 VSS 112 VDD 158 NC
21 CKE0 67 DQS5 113 NC 159 DM5/DQS14
22 VDD 68 DQ42 114 DQ20 160 VSS
23 DQ16 69 DQ43 115 A12 161 DQ46
24 DQ17 70 VDD 116 VSS 162 DQ47
25 DQS2 71 NC 117 DQ21 163 NC
26 VSS 72 DQ48 118 A11 164 VDD
27 A9 73 DQ49 119 DM2/DQS11 165 DQ52
Data rate
Mbps (max.)
Component
JEDEC speed bin*
(CL-tRCD-tRP)
Front side
1 pin
93 pin 144 pin 145 pin184 pin
Back side
1
Package
52 pin53 pin 92 pin
Contact
pad
Mounted devices
Data Sheet E0377E20 (Ver. 2.0)
2
EBD51RC4AKFA
Pin No. Pin name Pin No. Pin name Pin No. Pin name Pin No. Pin name
28 DQ18 74 VSS 120 VDD 166 DQ53
29 A7 75 NC 121 DQ22 167 NC
30 VDD 76 NC 122 A8 168 VDD
31 DQ19 77 VDD 123 DQ23 169 DM6/DQS15
32 A5 78 DQS6 124 VSS 170 DQ54
33 DQ24 79 DQ50 125 A6 171 DQ55
34 VSS 80 DQ51 126 DQ28 172 VDD
35 DQ25 81 VSS 127 DQ29 173 NC
36 DQS3 82 VDDID 128 VDD 174 DQ60
37 A4 83 DQ56 129 DM3/DQS12 175 DQ61
38 VDD 84 DQ57 130 A3 176 VSS
39 DQ26 85 VDD 131 DQ30 177 DM7/DQS16
40 DQ27 86 DQS7 132 VSS 178 DQ62
41 A2 87 DQ58 133 DQ31 179 DQ63
42 VSS 88 DQ59 134 CB4 180 VDD
43 A1 89 VSS 135 CB5 181 SA0
44 CB0 90 NC 136 VDD 182 SA1
45 CB1 91 SDA 137 CK0 183 SA2
46 VDD 92 SCL 138 /CK0 184 VDDSPD
Data Sheet E0377E20 (Ver. 2.0)
3
EBD51RC4AKFA
Pin Description
Pin name Function
Address input
A0 to A12
BA0, BA1 Bank select address
DQ0 to DQ63 Data input/output
CB0 to CB7 Check bit (Data input/output)
/RAS Row address strobe command
/CAS Column address strobe command
/WE Write enable
/CS0 Chip select
CKE0 Clock enable
CK0 Clock input
/CK0 Differential clock input
DQS0 to DQS8 Input and output data strobe
DM0 to DM8/DQS9 to DQS17 Input and output data strobe
SCL Clock input for serial PD
SDA Data input/output for serial PD
SA0 to SA2 Serial address input
VDD Power for internal circuit
VDDSPD Power for serial EEPROM
VREF Input reference voltage
VSS Ground
VDDID VDD identification flag
/RESET Reset pin (forces register inputs low)
NC No connection
Row address A0 to A12
Column address A0 to A9, A11
Data Sheet E0377E20 (Ver. 2.0)
4
EBD51RC4AKFA
Serial PD Matrix*
Byte No. Function described Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value Comments
0
1
2 Memory type 0 0 0 0 0 1 1 1 07H SDRAM DDR
3 Number of row address 0 0 0 0 1 1 0 1 0DH 13
4 Number of column address 0 0 0 0 1 0 1 1 0BH 11
5 Number of DIMM ranks 0 0 0 0 0 0 0 1 01H 1
6 Module data width 0 1 0 0 1 0 0 0 48H 72 bits
7 Module data width continuation 0 0 0 0 0 0 0 0 00H 0 (+)
8 Voltage interface level of this assembly 0 0 0 0 0 1 0 0 04H SSTL 2.5V
9
-7A, -7B 0 1 1 1 0 1 0 1 75H
10
-7A, -7B 0 1 1 1 0 1 0 1 75H 0.75ns*3
11 DIMM configuration type 0 0 0 0 0 0 1 0 02H ECC
12 Refresh rate/type 1 0 0 0 0 0 1 0 82H
13 Primary SDRAM width 0 0 0 0 0 1 0 0 04H × 4
14 Error checking SDRAM width 0 0 0 0 0 1 0 0 04H × 4
15
16
17
18
19
20
21 SDRAM module attributes 0 0 1 0 0 1 1 0 26H Registered
22 SDRAM device attributes: General 1 1 0 0 0 0 0 0 C0H ± 0.2V
23
24
-7A, -7B 0 1 1 1 0 1 0 1 75H 0.75ns*3
25 Minimum clock cycle time at CLX - 1 0 0 0 0 0 0 0 0 00H
26
27
-7A, -7B 0 1 0 1 0 0 0 0 50H 20ns
Number of bytes utilized by module
manufacturer
Total number of bytes in serial PD
device
DDR SDRAM cycle time, CL = X
-6B
SDRAM access from clock (tAC)
-6B
SDRAM device attributes:
Minimum clock delay back-to-back
column access
SDRAM device attributes:
Burst length supported
SDRAM device attributes: Number of
banks on SDRAM device
SDRAM device attributes:
/CAS latency
SDRAM device attributes:
/CS latency
SDRAM device attributes:
/WE latency
Minimum clock cycle time at CLX - 0.5
-6B, -7A
-7B 1 0 1 0 0 0 0 0 A0H
Maximum data access time (tAC) from
clock at CLX - 0.5
-6B
Maximum data access time (tAC) from
clock at CLX - 1
Minimum row precharge time (tRP)
-6B
1
1 0 0 0 0 0 0 0 80H 128
0 0 0 0 1 0 0 0 08H 256 byte
0 1 1 0 0 0 0 0 60H CL = 2.5*3
0 1 1 1 0 0 0 0 70H 0.70ns*3
7.8 µs
Self refresh
0 0 0 0 0 0 0 1 01H 1 CLK
0 0 0 0 1 1 1 0 0EH 2, 4, 8
0 0 0 0 0 1 0 0 04H 4
0 0 0 0 1 1 0 0 0CH 2, 2.5
0 0 0 0 0 0 0 1 01H 0
0 0 0 0 0 0 1 0 02H 1
0 1 1 1 0 1 0 1 75H
0 1 1 1 0 0 0 0 70H 0.70ns*3
0 0 0 0 0 0 0 0 00H
0 1 0 0 1 0 0 0 48H 18ns
CL = 2*3
Data Sheet E0377E20 (Ver. 2.0)
5
EBD51RC4AKFA
Byte No. Function described Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value Comments
28
-7A, -7B 0 0 1 1 1 1 0 0 3CH 15ns
29
-7A, -7B 0 1 0 1 0 0 0 0 50H 20ns
30
-7A, -7B 0 0 1 0 1 1 0 1 2DH 45ns
31 Module rank density 1 0 0 0 0 0 0 0 80H
32
-7A, -7B 1 0 0 1 0 0 0 0 90H 0.9ns*3
33
-7A, -7B 1 0 0 1 0 0 0 0 90H 0.9ns*3
34
-7A, -7B 0 1 0 1 0 0 0 0 50H 0.5ns*3
35
-7A, -7B 0 1 0 1 0 0 0 0 50H 0.5ns*3
36 to 40 Superset information 0 0 0 0 0 0 0 0 00H Future use
41
-7A, -7B 0 1 0 0 0 0 0 1 41H 65ns*3
42
-7A, -7B 0 1 0 0 1 0 1 1 4BH 75ns*3
43 SDRAM tCK cycle max. (tCK max.) 0 0 1 1 0 0 0 0 30H 12ns*3
44
-7A, -7B 0 0 1 1 0 0 1 0 32H 0.5ns*3
45
-7A, -7B 0 1 1 1 0 1 0 1 75H 0.75ns*3
46 to 61 Superset information 0 0 0 0 0 0 0 0 00H Future use
62 SPD revision 0 0 0 0 0 0 0 0 00H Initial
63
-7A 0 0 0 0 1 0 0 0 08H 8
-7B 0 0 1 1 0 0 1 1 33H 51
64 to 65 Manufacturer’s JEDEC ID code 0 1 1 1 1 1 1 1 7FH
66 Manufacturer’s JEDEC ID code 1 1 1 1 1 1 1 0 FEH Elpida Memory
Minimum row active to row active
delay (tRRD)
-6B
Minimum /RAS to /CAS delay (tRCD)
-6B
Minimum active to precharge time
(tRAS)
-6B
Address and command setup time
before clock (tIS)
-6B
Address and command hold time after
clock (tIH)
-6B
Data input setup time before clock
(tDS)
-6B
Data input hold time after clock (tDH)
-6B
Active command period (tRC)
-6B
Auto refresh to active/
Auto refresh command cycle (tRFC)
-6B
Dout to DQS skew
-6B
Data hold skew (tQHS)
-6B
Checksum for bytes 0 to 62
-6B
0 0 1 1 0 0 0 0 30H 12ns
0 1 0 0 1 0 0 0 48H 18ns
0 0 1 0 1 0 1 0 2AH 42ns
1 rank
512MB
0 1 1 1 0 1 0 1 75H 0.75ns*3
0 1 1 1 0 1 0 1 75H 0.75ns*3
0 1 0 0 0 1 0 1 45H 0.45ns*3
0 1 0 0 0 1 0 1 45H 0.45ns*3
0 0 1 1 1 1 0 0 3CH 60ns*3
0 1 0 0 1 0 0 0 48H 72ns*3
0 0 1 0 1 1 0 1 2DH 0.45ns*3
0 1 0 1 0 1 0 1 55H 0.55ns*3
0 1 0 1 0 0 0 1 51H 81
Continuation
code
Data Sheet E0377E20 (Ver. 2.0)
6
EBD51RC4AKFA
Byte No. Function described Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value Comments
67 to 71 Manufacturer’s JEDEC ID code 0 0 0 0 0 0 0 0 00H
72 Manufacturing location × × × × × × × × ××
73 Module part number 0 1 0 0 0 1 0 1 45H E
74 Module part number 0 1 0 0 0 0 1 0 42H B
75 Module part number 0 1 0 0 0 1 0 0 44H D
76 Module part number 0 0 1 1 0 1 0 1 35H 5
77 Module part number 0 0 1 1 0 0 0 1 31H 1
78 Module part number 0 1 0 1 0 0 1 0 52H R
79 Module part number 0 1 0 0 0 0 1 1 43H C
80 Module part number 0 0 1 1 0 1 0 0 34H 4
81 Module part number 0 1 0 0 0 0 0 1 41H A
82 Module part number 0 1 0 0 1 0 1 1 4BH K
83 Module part number 0 1 0 0 0 1 1 0 46H F
84 Module part number 0 1 0 0 0 0 0 1 41H A
85 Module part number 0 0 1 0 1 1 0 1 2DH —
86
-7A, -7B 0 0 1 1 0 1 1 1 37H 7
87
88 to 90 Module part number 0 0 1 0 0 0 0 0 20H (Space)
91 Revision code 0 0 1 1 0 0 0 0 30H Initial
92 Revision code 0 0 1 0 0 0 0 0 20H (Space)
93 Manufacturing date × × × × × × × × ××
94 Manufacturing date × × × × × × × × ××
95 to 98 Module serial number *2
99 to 127 Manufacturer specific data
Module part number
-6B
Module part number
-7A
-6B, -7B 0 1 0 0 0 0 1 0 42H B
0 0 1 1 0 1 1 0 36H 6
0 1 0 0 0 0 0 1 41H A
Notes: 1. All serial PD data are not protected. 0: Serial data, “driven Low”, 1: Serial data, “driven High”
2. Bytes 95 through 98 are assembly serial number.
3. These specifications are defined based on component specification, not module.
2
(ASCII-8bit
*
code)
Year code
(HEX)
Week code
(HEX)
Data Sheet E0377E20 (Ver. 2.0)
7
Block Diagram
BA0 to BA1
A0 to A12
VDDID
VSS
DQ0 to DQ3
DQ8 to DQ11
DQ16 to DQ19
DQ24 to DQ27
DQ32 to DQ35
DQ40 to DQ43
DQ48 to DQ51
DQ56 to DQ59
CB0 to CB3
/CS0
/RAS
/CAS
CKE0
/WE
PCK
/PCK
VDD
VREF
VSS
/RCS0
DQS0
DQS1
DQS2
DQS3
DQS4
DQS5
DQS6
DQS7
DQS8
R
S
R
S
R
S
R
S
R
S
R
S
R
S
R
S
/CS
DQS DM
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
/RCS0 -> /CS: SDRAMs D0 to D17
R
RBA0 to RBA1 -> BA0 to BA1: SDRAMs D0 to D17
E
G
RA0 to RA12 -> A0 to A12: SDRAMs D0 to D17
I
/RRAS -> /RAS: SDRAMs D0 to D17
S
T
/RCAS -> /CAS: SDRAMs D0 to D17
E
RCKE0A -> CKE: SDRAMs D0 to D17
R
/RWE -> /WE: SDRAMs D0 to D17
/RESET
D0
DQ
DQS DM/CS
D1
DQ
DQS DM/CS
D2
DQ
DQS DM/CS
D3
DQ
DQS DM/CS
D4
DQ
DQS DM/CS
D5
DQ
DQS DM/CS
D6
DQ
DQS DM/CS
D7
DQ
DQS DM/CS
D8
DQ
D0 to D17
D0 to D17
D0 to D17
open
CK0, /CK0 PLL*
Note: Wire per Clock loading table/Wiring diagrams.
DM0/DQS9
DQ4 to DQ7
DM1/DQS10
DQ12 to DQ15
DM2/DQS11
DQ20 to DQ23
DM3/DQS12
DQ28 to DQ31
DM4/DQS13
DQ36 to DQ39
DM5/DQS14
DQ44 to DQ47
DM6/DQS15
DQ52 to DQ55
DM7/DQS16
DQ60 to DQ63
DM8/DQS17
CB4 to CB7
EBD51RC4AKFA
R
S
/CS
DQS DM
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
R
S
R
4
S
SCL
Notes:
1. The SDA pull-up resistor is required due to
the open-drain/open-collector output.
2. The SCL pull-up resistor is recommended
because of the normal SCL line inacitve
"high" state.
D9
DQ
DQS DM/CS
D10
DQ
DQS DM/CS
D11
DQ
DQS DM/CS
D12
DQ
DQS DM/CS
D13
DQ
DQS DM/CS
D14
DQ
DQS DM/CS
D15
DQ
DQS DM/CS
D16
DQ
DQS DM/CS
D17
DQ
* D0 to D17: 256M bits DDR SDRAM
U0: 2k bits EEPROM
R
: 22Ω
S
PLL: CDCV857
Register: SSTV16857
Serial PD
SCL
SDA
SDA
U0
A0
A1 A2
SA0 SA1 SA2
Data Sheet E0377E20 (Ver. 2.0)
8
Differential Clock Net Wiring (CK0, /CK0)
0ns (nominal)
EBD51RC4AKFA
PLL
OUT1
CK0
/CK0
Notes: 1. The clock delay from the input of the PLL clock to the input of any SDRAM or register willl
be set to 0 ns (nominal).
2. Input, output and feedback clock lines are terminated from line to line as shown, and not
from line to ground.
3. Only one PLL output is shown per output type. Any additional PLL outputs will be wired
in a similar manner.
4. Termination resistors for feedback path clocks are located after the pins of the PLL.
120Ω
IN
120Ω
C
OUT'N'
Feedback
240Ω
240Ω
SDRAM
SDRAM
Register1
(Typically two registers per DIMM)
Register2
120Ω
Data Sheet E0377E20 (Ver. 2.0)
9
EBD51RC4AKFA
Electrical Specifications
• All voltages are referenced to VSS (GND).
Absolute Maximum Ratings
Parameter Symbol Value Unit Note
Voltage on any pin relative to VSS VT –1.0 to +3.6 V
Supply voltage relative to VSS VDD –1.0 to +3.6 V
Short circuit output current IOS 50 mA
Power dissipation PD 18 W
Operating ambient temperature TA 0 to +70 °C 1
Storage temperature Tstg –55 to +125 °C
Note: 1. DDR SDRAM component specification
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.
DC Operating Conditions (TA = 0 to +70°C) (DDR SDRAM Component Specification)
Parameter Symbol min. typ. max. Unit Notes
Supply voltage VDD, VDDQ 2.3 2.5 2.7 V 1
VSS 0 0 0 V
Input reference voltage VREF 0.49 × VDDQ 0.50 × VDDQ 0.51 × VDDQ V
Termination voltage VTT VREF – 0.04 VREF VREF + 0.04 V
Input high voltage VIH (DC) VREF + 0.15 — VDDQ + 0.3 V 2
Input low voltage VIL (DC) –0.3 — VREF – 0.15 V 3
Input voltage level,
CK and /CK inputs
Input differential cross point
voltage, CK and /CK inputs
Input differential voltage,
CK and /CK inputs
VIN (DC) –0.3 — VDDQ + 0.3 V 4
VIX (DC) 0.5 × VDDQ − 0.2V 0.5 × VDDQ 0.5 × VDDQ + 0.2V V
VID (DC) 0.36 — VDDQ + 0.6 V 5, 6
Notes: 1. VDDQ must be lower than or equal to VDD.
2. VIH is allowed to exceed VDD up to 3.6V for the period shorter than or equal to 5ns.
3. VIL is allowed to outreach below VSS down to –1.0V for the period shorter than or equal to 5ns.
4. VIN (DC) specifies the allowable DC execution of each differential input.
5. VID (DC) specifies the input differential voltage required for switching.
6. VIH (CK) min assumed over VREF + 0.18V, VIL (CK) max assumed under VREF – 0.18V
if measurement.
Data Sheet E0377E20 (Ver. 2.0)
10
EBD51RC4AKFA
DC Characteristics 1 (TA = 0 to +70°C, VDD = 2.5V ± 0.2V, VSS = 0V)
Parameter Symbol Grade max. Unit Test condition Notes
Operating current (ACTV-PRE) IDD0
Operating current
(ACTV-READ-PRE)
Idle power down standby current IDD2P 444 mA CKE ≤ VIL 4
Floating idle standby current IDD2F
Quiet idle standby current IDD2Q
Active power down standby
current
Active standby current IDD3N
Operating current
(Burst read operation)
Operating current
(Burst write operation)
Auto refresh current IDD5
Self refresh current IDD6 444 mA
Operating current
(4 banks interleaving)
IDD1
IDD3P
IDD4R
IDD4W
IDD7A
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
-6B
-7A, -7B
Notes. 1. These IDD data are measured under condition that DQ pins are not connected.
2. One bank operation.
3. One bank active.
4. All banks idle.
5. Command/Address transition once per one cycle.
6. DQ, DM and DQS transition twice per one cycle.
7. 4 banks active. Only one bank is running at tRC = tRC (min.)
8. The IDD data on this table are measured with regard to tCK = tCK (min.) in general.
9. Command/Address transition once every two clock cycles.
10. Command/Address stable at ≥ VIH or ≤ VIL.
2190
2010
2640
2370
840
750
750
714
750
714
1380
1290
3450
3090
3630
3270
3450
3360
6150
5250
mA
mA
mA
mA
mA CKE ≤ VIL 3
mA
mA
mA
mA
mA BL = 4 1, 5, 6, 7
CKE ≥ VIH,
tRC = tRC (min.)
CKE ≥ VIH, BL = 4,
CL = 3.5, tRC = tRC (min.)
CKE ≥ VIH, /CS ≥ VIH,
DQ, DQS, DM = VREF
CKE ≥ VIH, /CS ≥ VIH,
DQ, DQS, DM = VREF
CKE ≥ VIH, /CS ≥ VIH
tRAS = tRAS (max.)
CKE ≥ VIH, BL = 2,
CL = 3.5
CKE ≥ VIH, BL = 2,
CL = 3.5
tRFC = tRFC (min.),
Input ≤ VIL or ≥ VIH
Input ≥ VDD – 0.2 V
Input ≤ 0.2 V
1, 2, 9
1, 2, 5
4, 5
4, 10
3, 5, 6
1, 2, 5, 6
1, 2, 5, 6
DC Characteristics 2 (TA = 0 to +70°C, VDD, VDDQ = 2.5V ± 0.2V, VSS = 0V)
(DDR SDRAM component Specification)
Parameter Symbol min. max. Unit Test condition Notes
Input leakage current ILI –2 2 µA VDD ≥ VIN ≥ VSS
Output leakage current ILO –5 5 µA VDDQ ≥ VOUT ≥ VSS
Output high current IOH –15.2 — mA VOUT = 1.95V
Output low current IOL 15.2 — mA VOUT = 0.35V
Data Sheet E0377E20 (Ver. 2.0)
11
EBD51RC4AKFA
Pin Capacitance (TA = 25°C, VDD = 2.5V ± 0.2V)
Parameter Symbol Pins max. Unit Notes
Input capacitance CI1
Input capacitance CI2 CK, /CK 20 pF 1, 3
Data and DQS input/output
capacitance
CO DQ, DQS, CB 15 pF 1, 2, 3
Notes: 1. These parameters are measured on conditions: f = 100MHz, VOUT = VDDQ/2, ∆VOUT = 0.2V.
2. Dout circuits are disabled.
3. This parameter is sampled and not 100% tested.
AC Characteristics (TA = 0 to +70°°°°C, VDD, VDDQ = 2.5V ± 0.2V, VSS = 0V)
(DDR SDRAM component Specification)
-6B -7A -7B
Parameter Symbol min. max. min. max. min. max. Unit Notes
Clock cycle time
(CL = 2)
(CL = 2.5) tCK 6 12 7.5 12 7.5 12 ns
CK high-level width tCH 0.45 0.55 0.45 0.55 0.45 0.55 tCK
CK low-level width tCL 0.45 0.55 0.45 0.55 0.45 0.55 tCK
CK half period tHP
DQ output access time from
CK, /CK
DQS output access time from CK, /CK tDQSCK –0.6 0.6 –0.75 0.75 –0.75 0.75 ns 2, 11
DQS to DQ skew tDQSQ — 0.45 — 0.5 — 0.5 ns 3
DQ/DQS output hold time from DQS tQH tHP – tQHS — tHP – tQHS — tHP – tQHS — ns
Data hold skew factor tQHS — 0.55 — 0.75 — 0.75 ns
Data-out high-impedance time from
CK, /CK
Data-out low-impedance time from CK,
/CK
Read preamble tRPRE 0.9 1.1 0.9 1.1 0.9 1.1 tCK
Read postamble tRPST 0.4 0.6 0.4 0.6 0.4 0.6 tCK
DQ and DM input setup time tDS 0.45 — 0.5 — 0.5 — ns 8
DQ and DM input hold time tDH 0.45 — 0.5 — 0.5 — ns 8
DQ and DM input pulse width tDIPW 1.75 — 1.75 — 1.75 — ns 7
Write preamble setup time tWPRES 0 — 0 — 0 — ns
Write preamble tWPRE 0.25 — 0.25 — 0.25 — tCK
Write postamble tWPST 0.4 0.6 0.4 0.6 0.4 0.6 tCK 9
Write command to first DQS latching
transition
DQS falling edge to CK setup time tDSS 0.2 — 0.2 — 0.2 — tCK
DQS falling edge hold time from CK tDSH 0.2 — 0.2 — 0.2 — tCK
DQS input high pulse width tDQSH 0.35 — 0.35 — 0.35 — tCK
DQS input low pulse width tDQSL 0.35 — 0.35 — 0.35 — tCK
Address and control input setup time tIS 0.75 — 0.9 — 0.9 — ns 8
Address and control input hold time tIH 0.75 — 0.9 — 0.9 — ns 8
tCK 7.5 12 7.5 12 10 12 ns 10
tAC –0.7 0.7 –0.75 0.75 –0.75 0.75 ns 2, 11
tHZ –0.7 0.7 –0.75 0.75 –0.75 0.75 ns 5, 11
tLZ –0.7 0.7 –0.75 0.75 –0.75 0.75 ns 6, 11
tDQSS 0.75 1.25 0.75 1.25 0.75 1.25 tCK
Address, /RAS, /CAS, /WE,
/CS, CKE
min
(tCH, tCL)
—
min
(tCH, tCL)
15 pF 1, 3
—
min
(tCH, tCL)
— tCK
Data Sheet E0377E20 (Ver. 2.0)
12
EBD51RC4AKFA
-6B -7A -7B
Parameter Symbol min. max. min. max. min. max. Unit Notes
Address and control input pulse width tIPW 2.2 — 2.2 — 2.2 — ns 7
Mode register set command cycle time tMRD 2 — 2 — 2 — tCK
Active to Precharge command period tRAS 42 120000 45 120000 45 120000 ns
Active to Active/Auto refresh command
period
Auto refresh to Active/Auto refresh
command period
Active to Read/Write delay tRCD 18 — 20 — 20 — ns
Precharge to active command period tRP 18 — 20 — 20 — ns
Active to auto precharge delay tRAP tRCD min. — tRCD min. — tRCD min. — ns
Active to active command period tRRD 12 — 15 — 15 — ns
Write recovery time tWR 15 — 15 — 15 — ns
Auto precharge write recovery and
precharge time
Internal write to Read command delay tWTR 1 — 1 — 1 — tCK
Average periodic refresh interval tREF — 7.8 — 7.8 — 7.8 µs
Notes: 1. All the AC parameters listed in this data sheet is component specifications. For AC testing conditions,
refer to the corresponding component data sheet.
2. This parameter defines the signal transition delay from the cross point of CK and /CK. The signal
transition is defined to occur when the signal level crossing VTT.
3. The timing reference level is VTT.
4. Output valid window is defined to be the period between two successive transition of data out or DQS
(read) signals. The signal transition is defined to occur when the signal level crossing VTT.
5. tHZ is defined as DOUT transition delay from Low-Z to High-Z at the end of read burst operation. The
timing reference is cross point of CK and /CK. This parameter is not referred to a specific DOUT voltage
level, but specify when the device output stops driving.
6. tLZ is defined as DOUT transition delay from High-Z to Low-Z at the beginning of read operation. This
parameter is not referred to a specific DOUT voltage level, but specify when the device output begins
driving.
7. Input valid windows is defined to be the period between two successive transition of data input or DQS
(write) signals. The signal transition is defined to occur when the signal level crossing VREF.
8. The timing reference level is VREF.
9. The transition from Low-Z to High-Z is defined to occur when the device output stops driving. A specific
reference voltage to judge this transition is not given.
10. tCK (max.) is determined by the lock range of the DLL. Beyond this lock range, the DLL operation is not
assured.
11. tCK = tCK (min.) when these parameters are measured. Otherwise, absolute minimum values of these
values are 10% of tCK.
12. VDD is assumed to be 2.5V ± 0.2V. VDD power supply variation per cycle expected to be less than
0.4V/400 cycle.
13. tDAL = (tWR/tCK)+(tRP/tCK)
For each of the terms above, if not already an integer, round to the next highest integer.
Example: For –7A Speed at CL = 2.5, tCK = 7.5ns, tWR = 15ns and tRP= 20ns,
tDAL = (15ns/7.5ns) + (20ns/7.5ns) = (2) + (3)
tDAL = 5 clocks
tRC 60 — 65 — 65 — ns
tRFC 72 — 75 — 75 — ns
tDAL
(tWR/tCK)+
(tRP/tCK)
—
(tWR/tCK)+
(tRP/tCK)
—
(tWR/tCK)+
(tRP/tCK)
— tCK 13
Data Sheet E0377E20 (Ver. 2.0)
13
EBD51RC4AKFA
Timing Parameter Measured in Clock Cycle for Registered DIMM
Number of clock cycle
tCK 6ns 7.5ns
Parameter Symbol min. max. min. max. Unit
Write to pre-charge command delay
(same bank)
Read to pre-charge command delay
(same bank)
Write to read command delay (to input
all data)
Burst stop command to write command
delay
(CL = 3)
(CL = 3.5) tBSTW 3 — 3 — tCK
Burst stop command to DQ High-Z
(CL = 3)
(CL = 3.5) tBSTZ 3.5 3.5 3.5 3.5 tCK
Read command to write command
delay (to output all data)
(CL = 3)
(CL = 3.5) tRWD 3 + BL/2 — 3 + BL/2 — tCK
Pre-charge command to High-Z
(CL = 3)
(CL = 3.5) tHZP 3.5 3.5 3.5 3.5 tCK
Write command to data in latency tWCD 2 2 2 2 tCK
Write recovery tWR 2 1 — tCK
Register set command to active or
register set command
Self refresh exit to non-read command tSNR 12 — 10 — tCK
Self refresh exit to read command tSRD 200 — 200 — tCK
Power down entry tPDEN 1 1 1 1 tCK
Power down exit to command input tPDEX 1 — 1 — tCK
tWPD 4 + BL/2 — 3 + BL/2 — tCK
tRPD BL/2 — BL/2 — tCK
tWRD 2 + BL/2 — 2 + BL/2 — tCK
tBSTW — — 2 — tCK
tBSTZ — — 3 3 tCK
tRWD — — 2 + BL/2 — tCK
tHZP — — 3 3 tCK
tMRD 2 — 2 — tCK
Data Sheet E0377E20 (Ver. 2.0)
14
EBD51RC4AKFA
Pin Functions
CK, /CK (input pin)
The CK and the /CK are the master clock inputs. All inputs except DMs, DQSs and DQs are referred to the cross
point of the CK rising edge and the VREF level. When a read operation, DQSs and DQs are referred to the cross
point of the CK and the /CK. When a write operation, DMs and DQs are referred to the cross point of the DQS and
the VREF level. DQSs for write operation are referred to the cross point of the CK and the /CK.
/CS (input pin)
When /CS is low, commands and data can be input. When /CS is high, all inputs are ignored. However, internal
operations (bank active, burst operations, etc.) are held.
/RAS, /CAS, and /WE (input pins)
These pins define operating commands (read, write, etc.) depending on the combinations of their voltage levels.
See "Command operation".
A0 to A12 (input pins)
Row address (AX0 to AX12) is determined by the A0 to the A12 level at the cross point of the CK rising edge and the
VREF level in a bank active command cycle. Column address (AY0 to AY9, AY11) is loaded via the A0 to the A9
and the A11 at the cross point of the CK rising edge and the VREF level in a read or a write command cycle. This
column address becomes the starting address of a burst operation.
A10 (AP) (input pin)
A10 defines the precharge mode when a precharge command, a read command or a write command is issued. If
A10 = high when a precharge command is issued, all banks are precharged. If A10 = low when a precharge
command is issued, only the bank that is selected by BA1, BA0 is precharged. If A10 = high when read or write
command, auto-precharge function is enabled. While A10 = low, auto-precharge function is disabled.
BA0, BA1 (input pin)
BA0, BA1 are bank select signals (BA). The memory array is divided into bank 0, bank 1, bank 2 and bank 3. (See
Bank Select Signal Table)
[Bank Select Signal Table]
BA0 BA1
Bank 0 L L
Bank 1 H L
Bank 2 L H
Bank 3 H H
Remark: H: VIH. L: VIL.
CKE (input pin)
CKE controls power down and self-refresh. The power down and the self-refresh commands are entered when the
CKE is driven low and exited when it resumes to high.
The CKE level must be kept for 1 CK cycle at least, that is, if CKE changes at the cross point of the CK rising edge
and the VREF level with proper setup time tIS, at the next CK rising edge CKE level must be kept with proper hold
time tIH.
DQ, CB (input and output pins)
Data are input to and output from these pins.
DQS (input and output pin)
DQS provide the read data strobes (as output) and the write data strobes (as input).
Data Sheet E0377E20 (Ver. 2.0)
15
EBD51RC4AKFA
VDD (power supply pins)
2.5V is applied. (VDD is for the internal circuit.)
VDDSPD (power supply pin)
2.5V is applied (For serial EEPROM).
VSS (power supply pin)
Ground is connected.
/RESET (input pin)
LVCMOS reset input. When /RESET is low, all registers are reset and all outputs are low.
Detailed Operation Part and Timing Waveforms
Refer to the EDD2504AKTA datasheet (E0457E). DM pins of component device fixed to VSS level on the module
board. DIMM /CAS latency = component CL + 1 for registered type.
Data Sheet E0377E20 (Ver. 2.0)
16
Physical Outline
EBD51RC4AKFA
Unit: mm
128.95
(64.48)
(DATUM -A-)
Component area
(Front)
2.30
1 92
64.77 49.53
133.35 ± 0.15
2 – φ 2.50 ± 0.10
93
Component area
(Back)
4.00 max
4.00 min
AB
1.27 ± 0.10
184
10.00
17.80
30.48 ± 0.15
6.35
3.00 min
ECA-TS2-0050-01
4.00 ± 0.10
R 2.00
Detail A
1.27 typ
2.50 ± 0.20
1.00 ± 0.05
Note: Tolerance on all dimensions ± 0.13 unless otherwise specified.
Detail B
0.20 ± 0.15
3.80
(DATUM -A-)
6.62
2.175
R 0.90
1.80 ± 0.10
Data Sheet E0377E20 (Ver. 2.0)
17
EBD51RC4AKFA
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 ICs, chip capacitors and chip resistors. It is necessary to avoid undue mechanical stress on
these components to prevent damaging them.
In particular, do not push module cover or drop the modules in order to protect from mechanical defects,
which would be electrical defects.
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.
NOTES FOR CMOS DEVICES
1 PRECAUTION AGAINST ESD FOR MOS DEVICES
Exposing the MOS devices to a strong electric field can cause destruction of the gate
oxide and ultimately degrade the MOS devices operation. Steps must be taken to stop
generation of static electricity as much as possible, and quickly dissipate it, when once
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. MOS 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. MOS devices must not be touched with bare hands. Similar precautions
need to be taken for PW boards with semiconductor MOS devices on it.
2 HANDLING OF UNUSED INPUT PINS FOR CMOS DEVICES
No connection for CMOS devices input pins can be a 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. The unused pins must be handled in accordance with the related specifications.
MDE0202
3 STATUS BEFORE INITIALIZATION OF MOS DEVICES
Power-on does not necessarily define initial status of MOS devices. Production process
of MOS does not define the initial operation status of the device. Immediately after the
power source is turned ON, the MOS devices with reset function have not yet been
initialized. Hence, power-on does not guarantee output pin levels, I/O settings or
contents of registers. MOS devices are not initialized until the reset signal is received.
Reset operation must be executed immediately after power-on for MOS devices having
reset function.
CME0107
Data Sheet E0377E20 (Ver. 2.0)
18
EBD51RC4AKFA
The information in this document is subject to change without notice. Before using this document, 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 Elpida Memory, Inc.
Elpida Memory, Inc. does not assume any liability for infringement of any intellectual property rights
(including but not limited to patents, copyrights, and circuit layout licenses) of Elpida Memory, Inc. or
third parties by or arising from the use of the products or information listed in this document. No license,
express, implied or otherwise, is granted under any patents, copyrights or other intellectual property
rights of Elpida Memory, Inc. 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. Elpida Memory, Inc. assumes no responsibility for any losses
incurred by customers or third parties arising from the use of these circuits, software and information.
[Product applications]
Elpida Memory, Inc. makes every attempt to ensure that its products are of high quality and reliability.
However, users are instructed to contact Elpida Memory's sales office before using the product in
aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment,
medical equipment for life support, or other such application in which especially high quality and
reliability is demanded or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury.
[Product usage]
Design your application so that the product is used within the ranges and conditions guaranteed by
Elpida Memory, Inc., including the maximum ratings, operating supply voltage range, heat radiation
characteristics, installation conditions and other related characteristics. Elpida Memory, Inc. bears no
responsibility for failure or damage when the product is used beyond the guaranteed ranges and
conditions. Even within the guaranteed ranges and conditions, consider normally foreseeable failure
rates or failure modes in semiconductor devices and employ systemic measures such as fail-safes, so
that the equipment incorporating Elpida Memory, Inc. products does not cause bodily injury, fire or other
consequential damage due to the operation of the Elpida Memory, Inc. product.
[Usage environment]
This product is not designed to be resistant to electromagnetic waves or radiation. This product must be
used in a non-condensing environment.
If you export the products or technology described in this document that are controlled by the Foreign
Exchange and Foreign Trade Law of Japan, you must follow the necessary procedures in accordance
with the relevant laws and regulations of Japan. Also, if you export products/technology controlled by
U.S. export control regulations, or another country's export control laws or regulations, you must follow
the necessary procedures in accordance with such laws or regulations.
If these products/technology are sold, leased, or transferred to a third party, or a third party is granted
license to use these products, that third party must be made aware that they are responsible for
compliance with the relevant laws and regulations.
M01E0107
Data Sheet E0377E20 (Ver. 2.0)
19
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