RoHS Compliant
8GB DDR5 SDRAM UDIMM
Halogen free
Product Specifications
April 20, 2022
Version 1.0
Apacer Technology Inc.
1F., No.32, Zhongcheng Rd., Tucheng Dist., New Taipei City 236, Taiwan
Tel: +886-2-2267-8000
www.apacer.com
Fax: +886-2-2267-2261
Table of Contents
General Description ....................................................................................................... 2
Ordering Information ..................................................................................................... 2
Key Parameters .............................................................................................................. 2
Features: ......................................................................................................................... 3
Pin Assignments ............................................................................................................. 4
Pin Descriptions ............................................................................................................. 6
INPUT/OUTPUT FUNCTIONAL DESCRIPTION...................................................... 7
Functional Block Diagram ........................................................................................... 10
Absolute Maximum Ratings ........................................................................................ 11
DRAM Component Operating Temperature Range..................................................... 12
AC & DC OPERATING CONDITION ....................................................................... 13
DIMM Voltage Requirements ...................................................................................... 13
Mechanical Drawing .................................................................................................... 14
©Apacer Technology Inc.
1
General Description
Apacer D12.31492S.001 is a 8GB DDR5 SDRAM (Synchronous DRAM)
DIMM. This memory module consists of 4 pieces 1G x 16 bits DDR5
synchronous DRAMs in FBGA packages and 8K Bits EEPROM. The module is
a 288-pins dual in-line memory module and is intended for mounting into a
connector socket. The following provides general specifications of this module.
Ordering Information
Part Number
Density
Speed
Organization
DRAM Composition
Rank
D12.31492S.001
8GB
4800 Mbps
1Gx64
1Gx16 *4
1
Key Parameters
DDR5-4800
Speed
-CL40
Unit
tCK (min)
0.416
ns
CAS latency
40
nCK
tRCD (min)
16
ns
tRP (min)
16
ns
tRAS (min)
32
ns
tRC (min)
48
ns
CL-tRCD-tRP
40-39-39
nCK
©Apacer Technology Inc.
2
Features:
♦
JEDEC standard compliant
♦
On-DIMM thermal sensor : Yes
♦
PCB: height 31.25 mm, lead pitch 0.85 mm (pin),
♦
VDD = VDDQ= 1.1V (1.067V to 1.166V)
♦
VPP = 1.8V (1.746V to 1.908V)、VDDSPD = 1.8V
♦
32 internal banks (x4, x8): 8 groups of 4 banks each
♦
16 internal banks (x16): 4 groups of 4 banks each
♦
CAS Latency (CL): 22,26,28,30,32,36,40,42
♦
CAS Write Latency (CWL): RL-2
♦
Operating temperature Tcase–(0℃~85℃)
♦
Average Refresh period 3.9us at lower than Tcase 85°C, 1.95us at 85°C <
Tcase < 95 °C.
♦
All bank and same bank refresh
♦
Bi-Directional Differential Data Strobe
♦
16-bit prefetch architecture
♦
On-die ECC
♦
ECC transparency and error scrub
♦
sPPR and hPPR capability
♦
Halogen free、Lead-free (RoHS compliant)
©Apacer Technology Inc.
3
Pin Assignments
Pin No.
Front Side
Pin No.
Back Side
Pin No.
Front Side
Pin No.
Back Side
1
VIN_BULK
145
VIN_BULK
74
VSS
218
VSS
2
RFU
146
VIN_BULK
75
RFU
219
RFU
3
RFU
147
PWR_- GOOD
76
RFU
220
RFU
4
HSCL
148
HSA
77
VSS
221
VSS
5
HSDA
149
RFU
78
CK0_B_t
222
CK1_B_t
6
VSS
150
VSS
79
CK0_B_c
223
CK1_B_c
7
RFU
151
PWR_EN
80
VSS
224
VSS
8
VSS
152
RFU
81
RFU
225
RFU
9
DQ0_A
153
VSS
82
CA12_B
226
RFU
10
VSS
154
DQ2_A
83
VSS
227
VSS
11
DQ1_A
155
VSS
84
CA10_B
228
CA11_B
12
VSS
156
DQ3_A
85
CA8_B
229
CA9_B
13
DQS0_A_c
157
VSS
86
VSS
230
VSS
14
DQS0_A_t
158
DM0_A_n
87
CA6_B
231
CA7_B
15
VSS
159
VSS
88
CA4_B
232
CA5_B
16
DQ4_A
160
DQ6_A
89
VSS
233
VSS
17
VSS
161
VSS
90
CA2_B
234
CA3_B
18
DQ5_A
162
DQ7_A
91
CA0_B
235
CA1_B
19
VSS
163
VSS
92
VSS
236
VSS
20
DQ8_A
164
DQ10_A
93
CS0_B_n
237
CS1_B_n
21
VSS
165
VSS
94
VSS
238
VSS
22
DQ9_A
166
DQ11_A
95
RESET_n
239
DQS4_B_c
23
VSS
167
VSS
96
VSS
240
DQS4_B_t
24
DM1_A_n
168
DQS1_A_c
97
CB0_B
241
VSS
25
VSS
169
DQS1_A_t
98
VSS
242
CB2_B
26
DQ12_A
170
VSS
99
CB1_B
243
VSS
27
VSS
171
DQ14_A
100
VSS
244
CB3_B
28
DQ13_A
172
VSS
101
DQ0_B
245
VSS
29
VSS
173
DQ15_A
102
VSS
246
DQ2_B
30
DQ16_A
174
VSS
103
DQ1_B
247
VSS
31
VSS
175
DQ18_A
104
VSS
248
DQ3_B
32
DQ17_A
176
VSS
105
DQS0_B_c
249
VSS
33
VSS
177
DQ19_A
106
DQS0_B_t
250
DM0_B_n
34
DQS2_A_c
178
VSS
107
VSS
251
VSS
35
DQS2_A_t
179
DM2_A_n
108
DQ4_B
252
DQ6_B
36
VSS
180
VSS
109
VSS
253
VSS
37
DQ20_A
181
DQ22_A
110
DQ5_B
254
DQ7_B
38
VSS
182
VSS
111
VSS
255
VSS
39
DQ21_A
183
DQ23_A
112
DQ8_B
256
DQ10_B
©Apacer Technology Inc.
4
Pin No.
Front Side
Pin No.
Back Side
Pin No.
Front Side
Pin No.
Back Side
40
VSS
184
VSS
113
VSS
257
VSS
41
DQ24_A
185
DQ26_A
114
DQ9_B
258
DQ11_B
42
VSS
186
VSS
115
VSS
259
VSS
43
DQ25_A
187
DQ27_A
116
DM1_B_n
260
DQS1_B_c
44
VSS
188
VSS
117
VSS
261
DQS1_B_t
45
DM3_A_n
189
DQS3_A_c
118
DQ12_B
262
VSS
46
VSS
190
DQS3_A_t
119
VSS
263
DQ14_B
47
DQ28_A
191
VSS
120
DQ13_B
264
VSS
48
VSS
192
DQ30_A
121
VSS
265
DQ15_B
49
DQ29_A
193
VSS
122
DQ16_B
266
VSS
50
VSS
194
DQ31_A
123
VSS
267
DQ18_B
51
CB0_A
195
VSS
124
DQ17_B
268
VSS
52
VSS
196
CB2_A
125
VSS
269
DQ19_B
53
CB1_A
197
VSS
126
DQS2_B_c
270
VSS
54
VSS
198
CB3_A
127
DQS2_B_t
271
DM2_B_n
55
DQS4_A_c
199
VSS
128
VSS
272
VSS
56
DQS4_A_t
200
ALERT_n
129
DQ20_B
273
DQ22_B
57
VSS
201
VSS
130
VSS
274
VSS
58
CS0_A_n
202
CS1_A_n
131
DQ21_B
275
DQ23_B
59
VSS
203
VSS
132
VSS
276
VSS
60
CA0_A
204
CA1_A
133
DQ24_B
277
DQ26_B
61
CA2_A
205
CA3_A
134
VSS
278
VSS
62
VSS
206
VSS
135
DQ25_B
279
DQ27_B
63
CA4_A
207
CA5_A
136
VSS
280
VSS
64
CA6_A
208
CA7_A
137
DM3_B_n
281
DQS3_B_c
65
VSS
209
VSS
138
VSS
282
DQS3_B_t
66
CA8_A
210
CA9_A
139
DQ28_B
283
VSS
67
CA10_A
211
CA11_A
140
VSS
284
DQ30_B
68
VSS
212
VSS
141
DQ29_B
285
VSS
69
CA12_A
213
RFU
142
VSS
286
DQ31_B
70
RFU
214
RFU
143
RFU
287
VSS
71
VSS
215
VSS
144
RFU
288
RFU
72
CK0_A_t
216
CK1_A_t
73
CK0_A_c
217
CK1_A_c
©Apacer Technology Inc.
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Pin Descriptions
Pin Name
CA0_A – CA12_A,
Descripti
SDRAM Command/Address bus
CA0_B – CA12_B
CS0_A_n – CS1_A_n,
SDRAM Chip Select
CS0_B_n – CS1_B_n
DQ0_A – DQ31_A,
DIMM memory data bus
DQ0 B – DQ31 B
CB0_A – CB3_A,
DIMM ECC check bits (Only applicable on ECC SODIMM or
CB0 B – CB3 B
ECC UDIMM)
DQS0_A_t – DQS4_A_t,
DQS0_B_t – DQS4_B_t
DQS0_A_c – DQS4_A_c,
SDRAM data strobes (positive line of differential pair)
SDRAM data strobes (negative line of differential pair)
DQS0_B_c – DQS4_B_c
DM0_A_n – DM3_A_n,
DM0_B_n – DM3_B_n
CK0_A_t, CK1_A_t,
CK0_B_t, CK1_B_t
CK0_A_c, CK1_A_c,
CK0_B_c, CK1_B_c
SDRAM data masks
SDRAM clocks (positive line of differential pair)
SDRAM clocks (negative line of differential pair)
HSCL
Side Band bus clock
HSDA
Side Band bus data
HSA
Side Band bus address
ALERT_n
SDRAM ALERT_n
RESET_n
Set DRAMs to a Known State
VIN_BULK
5 V power input supply to the PMIC for analog circuits
VSS
Power supply return (ground)
PWR_GOOD
Power good indicator
PWR_EN
PMIC Enable
RFU
Reserved for future use
*Notes:
DDR5 UDIMM has 2 channels (channel-A and channel-B) of signal bus.
The signals with suffix: _A (e.g. DQ0_A) are for channel-A, and the signals with suffix: _B (e.g. DQ0_B) are for
channel-B
©Apacer Technology Inc.
6
INPUT/OUTPUT FUNCTIONAL DESCRIPTION
Symbol
Type
I/O Levels
Description
CK[1:0]_A_t,
CK[1:0]_B_t,
Clock: CK_t and CK_c are differential clock inputs. All
Input
VDD
CK[1:0]_A_c,
address and con- trol input signals are sampled on the
crossing of the positive edge of CK_t and negative
edge of CK_c.
CK[1:0]_B_c
Command/Address Inputs: CA signals provide the
command and address inputs according to the
CA[12:0]_A
Input
VDD
CA[12:0]_B
Command Truth Table.
Note: Since some commands are multi-cycle, the pins
may not be interchanged between devices on the
same bus.
Chip Select: All commands are masked when CS_n is
CS[1:0]_A_n
Input
VDD
CS[1:0]_B_n
registered HIGH. CS_n pro- vides for external rank
selection on systems with multiple ranks.
Alert: If there is an error in CRC, then ALERT_n drives
LOW for the period time interval and returns HIGH.
ALERT_n
Output
VDD
During connectivity test mode, this pin functions as an
input. Usage of this signal is system-dependent. In the
case where this pin is not connected, ALERT_n must
be bonded to VDDQ on the system board.
Active Low Asynchronous Reset: Reset is active when
CMOS
RESET_n
Input
RESET_n is LOW, and inactive when RESET_n is HIGH.
VDD
RESET_n must be HIGH during normal operation.
RESET_n is a CMOS rail-to-rail signal with DC HIGH
and LOW at 80% and 20% of VDDQ.
©Apacer Technology Inc.
7
Symbol
Type
I/O Levels
Description
Power Good Indicator: Open drain output. The PMIC
ensures this pin HIGH when VIN_Bulk input supply, as
well as all enabled output buck regulators and all LDO
regulators tolerance threshold is maintained as
configured in the appropri- ate register. The PMIC
Input /
PWR_GOOD
Output
drives this pin LOW when VIN_Bulk input goes below
VDD
the threshold or when any of the enabled output buck
regulator exceeds the thresh- olds configured in the
appropriate register or when any LDO output
regulator exceeds the threshold configured in the
appropriate register. As an input, the PMIC disables its
output regulator when this pin is LOW. The LDO
outputs remain on.
Host Sideband Bus Clock: Bus clock used to strobe
HSCL
data into HUB device. When open drain, a pull-up
Input
resistor is required on the system motherboard.
Host Sideband Bus Data:I2C/I3C-Basic data. When
Input /
open drain, a pull-up resis- tor is required on the
Output
system motherboard.
HSDA
Host Sideband Bus Device ID: Address input to a hub
or other client device to distinguish between identical
devices in the I3C basic address range. Tied to GND,
HSA
Input
HSA has different resistor values on the motherboard
to identify DIMM slot address. Refer to the SPD Hub
spec for more information.
Data Input/ Output: Bi-directional data bus.
DQ[31:0]_A
Input /
DQ[31:0]_B
Output
CB[3:0]_A
Input /
VDD
added at the end of Data Burst.
DIMM ECC check bits.
VDD
CB[3:0]_B
Output
©Apacer Technology Inc.
If CRC is enabled via Mode register then CRC code is
(Only applicable on ECC SODIMM or ECC UDIMM)
8
Symbol
Type
I/O Levels
Description
Data Strobe: Output with read data, input with write
DQS[4:0]_A_t
data. Edge-aligned with read data, centered in write
DQS[4:0]_B_t
data. The data strobe DQS_t is paired with differenInput /
VDD
Output
tial signals DQS_c, respectively, to provide differential
DQS[4:0]_A_c
pair signaling to the system during reads and writes.
DQS[4:0]_B_c
DDR5 SDRAM only supports differential data strobe. It
does not support single-ended strobe.
Input Data Mask: DM_n is an input mask signal for
write data. Input data is masked when DM_n is
sampled LOW coincident with that input data during a
write access. DM_n is sampled on both edges of DQS.
DM[3:0]_A_n
Input
DM[3:0]_B_n
VDD
DM function is shared with TDQS on x8 devices. The
function of DM_n is enabled by MR5:OP[5] = 1. Refer
to Micron DDR5 component data sheet specification
for further detail.
VIN_BULK
Supply
External Power Supply: 5V, 4.25V (min), 5.5V (max)
PMIC Enable: When this pin is HIGH, the PMIC turns
on the regulator. When this pin is LOW, the PMIC turns
PWR_EN
Input
off the regulator. This signal is connected to the
PMIC's VR_EN pin.
VSS
Supply
Ground
Reserved for future use. No on DIMM electrical
RFU
connection is present.
No connect: No internal electrical connection is
NC
present.
No function: May have internal connection present,
NF
©Apacer Technology Inc.
but has no
9
function.
Functional Block Diagram
©Apacer Technology Inc.
10
Absolute Maximum Ratings
Parameter
Symbol
Rating
Units
Notes
Voltage on VDD pin relative to Vss
VDD
- 0.3 ~ 1.4
V
1
Voltage on VDDQ pin relative to Vss
VDDQ
- 0.3 ~ 1.4
V
1
Voltage on VPP pin relative to Vss
VPP
- 0.3 ~ 2.1
V
Voltage on any pin relative to Vss
VIN, VOUT
- 0.3 ~ 1.4
V
1
Storage temperature
TSTG
–55 to +100
°C
1,2
Notes:
1.
Stresses greater than those listed in this table may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions above those indicated in the
operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
2.
Storage temperature is the case surface temperature on the center/top side of the device. For the measurement
conditions, refer to JESD51-2 standard.
©Apacer Technology Inc.
11
DRAM Component Operating Temperature
Range
Temperature Range
Symbol
(Units : ℃)
Parameter
Min
Max
Grade
Notes
Toper normal
Normal Operating Temperature
0
85
NT
1,2,3,4
Toper extended
Extended Operating Temperature
0
95
XT
1,2,3,4,5
Notes:
1.
All operating temperature symbols, ranges, acronyms are referred from JESD402-1.
2.
Operating Temperature is the case surface temperature on the center/top side of the DRAM. For the
measurement conditions, please refer to JESD51-2 standard.
3.
All DDR5 SDRDAMs are required to operate in NT and XT temperature ranges.
4.
If TC exceeds 85°C, the DRAM must be refreshed externally at 2X refresh, which is a 1.95μs interval refresh rate.
5.
Operating Temperature for 3DS needs to be derated by the number of DRAM dies as: [TOPER – (2.5°C ×
log2N)], where N is the number of the stacked dies.
©Apacer Technology Inc.
12
AC & DC OPERATING CONDITION
DIMM Voltage Requirements
Voltage Rating (Volts)
Maximum
Power
Symbol
Parameter
Expected Current
Minimum
Typical
State
Maximum
(Amps)
VIN_BULK
Host Supply Voltage
4.25
5.0
5.5
2.A
Operational
SWA,SWB
PMIC Output Supply Voltage
-
1.1
-
6
Operational
SWA+SWB
PMIC Output Supply Voltage
-
1.1
-
12
Operational
SWC
PMIC Output Supply Voltage
-
1.8
-
2
Operational
1.8V LDO
PMIC Output Supply Voltage
-
1.8
-
0.025(maximum)
Operational
1.0V LDO
PMIC Output Supply Voltage
-
1.0
-
0.020(maximum)
Operational
NOTE :
1.
Input supplies referenced in this table are VIN_BULK and VIN.
2.
During first power-on, the input voltage supply must reach a minimum of 4.25V for the PMIC to detect a valid
input supply.
3.
The ramp up rate is between 300mV and 4.0V.
4.
The ramp down rate is between 4.0V and 300mV.
5.
The area under the curve and above VIN_Bulk = TBD. The VIN_Bulk_AC spec must also be satisfied.
6.
The minimum input current requirement is equal to the maximum output current on VOUT_1.8V and VOUT_1.0V
LDO, plus the current required by the PMIC for its own use. The maximum input current is equal to the all
VIN_Bulk input on the PMIC.
7.
VIN_Bulk = 5.0V measured at room temperature. All circuitry, including output regulators and LDOs are off. The
VR_EN signal is static LOW or HIGH. The GSI_n signal is pulled HIGH. I2C or 13C basic interface access is not
allowed, and the bus is pulled HIGH. The PID signal is pulled either HIGH or LOW
8.
VIN_Bulk = 5.0V measured at room temperature. All output regulators and LDOs are on the 0A output load. The
VR_EN signal is static LOW or HIGH. The GSI_n signal is pulled HIGH. I2C or 13C basic interface access is not
allowed, and the bus is pulled HIGH. The PID signal is pulled either HIGH or LOW.
©Apacer Technology Inc.
13
Mechanical Drawing
Unit: mm
(All dimensions are in millimeters with ±0.15mm tolerance unless specified otherwise.)
©Apacer Technology Inc.
14
Revision History
Revision
Date
Description
1.0
4/12/2022
Initial release
©Apacer Technology Inc.
15
Remark
Global Presence
Taiwan (Headquarters)
Apacer Technology Inc.
1F., No.32, Zhongcheng Rd., Tucheng Dist.,
New Taipei City 236, Taiwan R.O.C.
Tel: +886-2-2267-8000
Fax: +886-2-2267-2261
amtsales@apacer.com
U.S.A.
Apacer Memory America, Inc.
46732 Lakeview Blvd., Fremont, CA 94538
Tel: 1-408-518-8699
Fax: 1-510-249-9568
sa@apacerus.com
Japan
Apacer Technology Corp.
5F, Matsura Bldg., Shiba, Minato-Ku
Tokyo, 105-0014, Japan
Tel: 81-3-5419-2668
Fax: 81-3-5419-0018
jpservices@apacer.com
Europe
Apacer Technology B.V.
Science Park Eindhoven 5051 5692 EB Son,
The Netherlands
Tel: 31-40-267-0000
Fax: 31-40-290-0686
sales@apacer.nl
China
Apacer Electronic (Shanghai) Co., Ltd.
Room D, 22/FL, No.2, Lane 600, JieyunPlaza,
Tianshan RD , Shanghai , 200051, China
Tel: 86-21-6228-9939
Fax:86-21-6228-9936
sales@apacer.com.cn
India
Apacer Technologies Pvt Ltd.
1874, South End C Cross,9th Block Jayanagar,
Bangalore-560069,INDIA.
Tel: 91-80-4152-9061/62
Fax: 91-80-4170-0215
sales_india@apacer.com
©Apacer Technology Inc.
16