128Mb: x32 Automotive SDRAM
Features
Automotive SDR SDRAM
MT48LC4M32B2 – 1 Meg x 32 x 4 Banks
Features
• PC100-compliant
• Fully synchronous; all signals registered on positive
edge of system clock
• Internal pipelined operation; column address can
be changed every clock cycle
• Internal banks for hiding row access/precharge
• Programmable burst lengths: 1, 2, 4, 8, or full page
• Auto precharge, includes concurrent auto precharge
and auto refresh modes
• Self refresh mode (not available on AT devices)
• Auto refresh
– 64ms, 4096-cycle refresh (commercial and
industrial)
– 16ms, 4096-cycle refresh (automotive)
• LVTTL-compatible inputs and outputs
• Single 3.3V ±0.3V power supply
• Supports CAS latency (CL) of 1, 2, and 3
• AEC-Q100
• PPAP submission
• 8D response time
Options
• Configuration
– 4 Meg x 32 (1 Meg x 32 x 4 banks)
• Package – OCPL
1
– 86-pin TSOP II (400 mil)
– 86-pin TSOP II (400 mil) Pb-free
– 90-ball VFBGA (8mm x 13mm)
– 90-ball VFBGA (8mm x 13mm) Pb-
free
• Timing (cycle time)
– 6ns (167 MHz)
– 6ns (167 MHz)
– 7ns (143 MHz)
• Revision
• Special options
– Automotive grade
– Product longevity program
• Operating temperature range
– Industrial (–40°C to +85°C)
– Automotive (–40°C to +105°C)
Notes:
1.
2.
3.
4.
Marking
4M32B2
TG
P
F5
B5
-6A
3
-6
2
-7
2
:G/:L
A
4
X
IT
AT
5
Off-center parting line.
Available only on Revision G.
Available only on Revision L.
Some automotive parts are included in the
product longevity program (PLP) and some
are not, see www.micron.com/plp for a list
of PLP parts.
5. Contact Micron for availability.
Table 1: Key Timing Parameters
CL = CAS (READ) latency
Speed Grade
-6
-6A
-7
Clock
Frequency (MHz)
167
167
143
Target
t
RCD-
t
RP-CL
3-3-3
3-3-3
3-3-3
t
RCD
(ns)
t
RP
(ns)
CL (ns)
18
18
15
18
18
15
18
18
15
PDF: 09005aef84ee4811
128mb_x32_ait-aat_sdram.pdf - Rev. C 4/16 EN
1
Products and specifications discussed herein are subject to change by Micron without notice.
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
128Mb: x32 Automotive SDRAM
Features
Table 2: Address Table
Parameter
Configuration
Refresh count
Row addressing
Bank addressing
Column addressing
4 Meg x 32
1 Meg x 32 x 4 banks
4K
4K A[11:0]
4 BA[1:0]
256 A[7:0]
Table 3: 128Mb (x32) SDR Part Numbering
Part Numbers
MT48LC4M32B2TG
MT48LC4M32B2P
MT48LC4M32B2F5
1
MT48LC4M32B2B5
1
Note:
1. FBGA Device Decoder: www.micron.com/decoder.
Architecture
4 Meg x 32
4 Meg x 32
4 Meg x 32
4 Meg x 32
PDF: 09005aef84ee4811
128mb_x32_ait-aat_sdram.pdf - Rev. C 4/16 EN
2
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
128Mb: x32 Automotive SDRAM
Features
Contents
General Description ......................................................................................................................................... 7
Automotive Temperature .............................................................................................................................. 7
Functional Block Diagram ................................................................................................................................ 8
Pin and Ball Assignments and Descriptions ....................................................................................................... 9
Package Dimensions ....................................................................................................................................... 12
Temperature and Thermal Impedance ............................................................................................................ 14
Electrical Specifications .................................................................................................................................. 17
Electrical Specifications – I
DD
Parameters ........................................................................................................ 18
Electrical Specifications – AC Operating Conditions ......................................................................................... 20
Functional Description ................................................................................................................................... 23
Commands .................................................................................................................................................... 24
COMMAND INHIBIT .................................................................................................................................. 24
NO OPERATION (NOP) ............................................................................................................................... 25
LOAD MODE REGISTER (LMR) ................................................................................................................... 25
ACTIVE ...................................................................................................................................................... 25
READ ......................................................................................................................................................... 26
WRITE ....................................................................................................................................................... 27
PRECHARGE .............................................................................................................................................. 28
BURST TERMINATE ................................................................................................................................... 28
REFRESH ................................................................................................................................................... 29
AUTO REFRESH ..................................................................................................................................... 29
SELF REFRESH ....................................................................................................................................... 29
Truth Tables ................................................................................................................................................... 30
Initialization .................................................................................................................................................. 35
Mode Register ................................................................................................................................................ 37
Burst Length .............................................................................................................................................. 39
Burst Type .................................................................................................................................................. 39
CAS Latency ............................................................................................................................................... 41
Operating Mode ......................................................................................................................................... 41
Write Burst Mode ....................................................................................................................................... 41
Bank/Row Activation ...................................................................................................................................... 42
READ Operation ............................................................................................................................................. 43
WRITE Operation ........................................................................................................................................... 52
Burst Read/Single Write .............................................................................................................................. 59
PRECHARGE Operation .................................................................................................................................. 60
Auto Precharge ........................................................................................................................................... 60
AUTO REFRESH Operation ............................................................................................................................. 72
SELF REFRESH Operation ............................................................................................................................... 74
Power-Down .................................................................................................................................................. 76
Clock Suspend ............................................................................................................................................... 77
Revision History ............................................................................................................................................. 80
Rev. C – 04/16 ............................................................................................................................................. 80
Rev. B – 10/13 ............................................................................................................................................. 80
Rev. A – 10/12 ............................................................................................................................................. 80
PDF: 09005aef84ee4811
128mb_x32_ait-aat_sdram.pdf - Rev. C 4/16 EN
3
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
128Mb: x32 Automotive SDRAM
Features
List of Figures
Figure 1: 4 Meg x 32 Functional Block Diagram ................................................................................................. 8
Figure 2: 86-Pin TSOP Pin Assignments (Top View) ........................................................................................... 9
Figure 3: 90-Ball FBGA Ball Assignments (Top View) ....................................................................................... 10
Figure 4: 86-Pin Plastic TSOP II (400 mil) – Package Codes TG/P ...................................................................... 12
Figure 5: 90-Ball VFBGA (8mm x 13mm) ......................................................................................................... 13
Figure 6: Example: Temperature Test Point Location, 54-Pin TSOP (Top View) ................................................. 15
Figure 7: Example: Temperature Test Point Location, 90-Ball VFBGA (Top View) .............................................. 16
Figure 8: ACTIVE Command .......................................................................................................................... 25
Figure 9: READ Command ............................................................................................................................. 26
Figure 10: WRITE Command ......................................................................................................................... 27
Figure 11: PRECHARGE Command ................................................................................................................ 28
Figure 12: Initialize and Load Mode Register .................................................................................................. 36
Figure 13: Mode Register Definition ............................................................................................................... 38
Figure 14: CAS Latency .................................................................................................................................. 41
Figure 15: Example: Meeting
t
RCD (MIN) When 2 <
t
RCD (MIN)/
t
CK < 3 .......................................................... 42
Figure 16: Consecutive READ Bursts .............................................................................................................. 44
Figure 17: Random READ Accesses ................................................................................................................ 45
Figure 18: READ-to-WRITE ............................................................................................................................ 46
Figure 19: READ-to-WRITE With Extra Clock Cycle ......................................................................................... 47
Figure 20: READ-to-PRECHARGE .................................................................................................................. 47
Figure 21: Terminating a READ Burst ............................................................................................................. 48
Figure 22: Alternating Bank Read Accesses ..................................................................................................... 49
Figure 23: READ Continuous Page Burst ......................................................................................................... 50
Figure 24: READ – DQM Operation ................................................................................................................ 51
Figure 25: WRITE Burst ................................................................................................................................. 52
Figure 26: WRITE-to-WRITE .......................................................................................................................... 53
Figure 27: Random WRITE Cycles .................................................................................................................. 54
Figure 28: WRITE-to-READ ............................................................................................................................ 54
Figure 29: WRITE-to-PRECHARGE ................................................................................................................. 55
Figure 30: Terminating a WRITE Burst ............................................................................................................ 56
Figure 31: Alternating Bank Write Accesses ..................................................................................................... 57
Figure 32: WRITE – Continuous Page Burst ..................................................................................................... 58
Figure 33: WRITE – DQM Operation ............................................................................................................... 59
Figure 34: READ With Auto Precharge Interrupted by a READ ......................................................................... 61
Figure 35: READ With Auto Precharge Interrupted by a WRITE ........................................................................ 62
Figure 36: READ With Auto Precharge ............................................................................................................ 63
Figure 37: READ Without Auto Precharge ....................................................................................................... 64
Figure 38: Single READ With Auto Precharge .................................................................................................. 65
Figure 39: Single READ Without Auto Precharge ............................................................................................. 66
Figure 40: WRITE With Auto Precharge Interrupted by a READ ........................................................................ 67
Figure 41: WRITE With Auto Precharge Interrupted by a WRITE ...................................................................... 67
Figure 42: WRITE With Auto Precharge ........................................................................................................... 68
Figure 43: WRITE Without Auto Precharge ..................................................................................................... 69
Figure 44: Single WRITE With Auto Precharge ................................................................................................. 70
Figure 45: Single WRITE Without Auto Precharge ............................................................................................ 71
Figure 46: Auto Refresh Mode ........................................................................................................................ 73
Figure 47: Self Refresh Mode .......................................................................................................................... 75
Figure 48: Power-Down Mode ........................................................................................................................ 76
Figure 49: Clock Suspend During WRITE Burst ............................................................................................... 77
Figure 50: Clock Suspend During READ Burst ................................................................................................. 78
PDF: 09005aef84ee4811
128mb_x32_ait-aat_sdram.pdf - Rev. C 4/16 EN
4
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
128Mb: x32 Automotive SDRAM
Features
Figure 51: Clock Suspend Mode ..................................................................................................................... 79
PDF: 09005aef84ee4811
128mb_x32_ait-aat_sdram.pdf - Rev. C 4/16 EN
5
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2012 Micron Technology, Inc. All rights reserved.
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