Datasheet MSC23S2640E-8BS8 Datasheet (OKI)

MSC23S2640E-8BS8 (98.08.19)

Semiconductor

MSC23S2640E-8BS8

2,097,152 Word x 64 Bit SYNCHRONOUS DYNAMIC RAM MODULE (1BANK):

DESCRIPTION

The Oki MSC23S2640E-8BS8 is a fully decoded, 2,097,152 x 64bit synchronous
dynamic random access memory composed of eight 16Mb DRAMs (2Mx8) in TSOP
packages mounted with decoupling capacitors on a 168-pin glass epoxy Dual-in-Line
Package supports any application where high density and large capacity of storage
memory are required, like for example PCs or servers.

FEATURES

• 2-Meg Word x 64-Bit (1Bank 8 Byte) organization

• 168-pin Dual Inline Memory Module

• All DQ Pins have 10Ω Damping Resister

• Single 3.3V power supply, ±0.3V tolerance

• Input :LVTTL compatible

• Output :LVTTL compatible

• Refresh : 4,096 cycles/64 ms

• Programmable data transfer mode

• Burst length (1, 2, 4, 8, Full)

• Data scramble (sequential, interleave)

• CBR auto-refresh, Self-refresh capability

• Serial Presence Detect (SPD) With EEPROM

• CAS latency

(2, 3)

PRODUCT ORGA NIZATION

Product Nam e Operation Access Time (Max.)

Frequency (Max.) t

MSC23S2640E -8BS8 125MHz 10.0ns 6.0ns

Note. Specification are subject to change without notice.

AC2

t

AC3

Page 1/11

MSC23S2640E-8BS8 (98.08.19)

/

/

/

/

/

/

/

/

/

/

/

BLOCK DIAGRAM

CKE0

CS0

DQMB0

DQ0

DQ7
DQMB1

DQ8

DQ15

DQMB4

DQ32

DQ39
DQMB5

DQ40

DQ47

DQM CKE

DQ0

CS

1

DQ7

DQM CKE

DQ0

CS

2

DQ7

DQM CKE

DQ0

CS

5

DQ7

CS

DQM CKE

DQ0

6

DQ7

CS2

DQMB2

DQ16

DQ23

DQMB3

DQ24

DQ31

DQMB6

DQ48

DQ55

DQMB7

DQ56

DQ63

DQM CKE

DQ0

DQ7

DQM CKE

DQ0

DQ7

DQM CKE

DQ0

DQ7

DQM CKE

DQ0

DQ7

SCL

CS

3

CS

4

CS

7

CS

8

Serial PD

9

A0 A1 A2

SDA

WP

1
2

CLK0

3.3pF

RAS,/CAS,/WE

A0-A11

5

CLK1

6

18

10pF

á

Note. The Value of all resistors is 10Ω expect WP.

MODULE OUTLINE

Vcc

Vss

CLK2

0.1uF 0.33uF

SA0 SA1 SA2

3.3pF

47KΩ

3

4

CLK3

7
8

Two Decoupling Capacitors
per SDRAM

10pF

(Front)
(Back)

109411

1

85

95

40

12441125

84

168

Page 2/11

MSC23S2640E-8BS8 (98.08.19)

de

de

de

de

)

)

)

PIN CONFIGURATION

Front si

Pin No. Pin name Pin No. Pin name Pin No. Pin name Pin No. Pin name

1 VSS 85 VSS 43 VSS 127 VSS
2 DQ0 86 DQ32 44 N.C 128 CKE0
3 DQ1 87 DQ33 45 /CS2 129 N.C
4 DQ2 88 DQ34 46 DQMB2 130 DQMB6
5 DQ3 89 DQ35 47 DQMB3 131 DQMB7
6 VCC 90 VCC 48 N.C 132 N.C
7 DQ4 91 DQ36 49 VCC 133 VCC
8 DQ5 92 DQ37 50 N.C 134 N.C

9 DQ6 93 DQ38 51 N.C 135 N.C
10 DQ7 94 DQ39 52 N.C 136 N.C
11 DQ8 95 DQ40 53 N.C 137 N.C
12 VSS 96 VSS 54 VSS 138 VSS
13 DQ9 97 DQ41 55 DQ16 139 DQ48
14 DQ10 98 DQ42 56 DQ17 140 DQ49
15 DQ11 99 DQ43 57 DQ18 141 DQ50
16 DQ12 100 DQ44 58 DQ19 142 DQ51
17 DQ13 101 DQ45 59 VCC 143 VCC
18 VCC 102 VCC 60 DQ20 144 DQ52
19 DQ14 103 DQ46 61 N.C 145 N.C
20 DQ15 104 DQ47 62 N.C 146 N.C
21 N.C 105 N.C 63 N.C 147 N.C
22 N.C 106 N.C 64 VSS 148 VSS
23 VSS 107 VSS 65 DQ21 149 DQ53
24 N.C 108 N.C 66 DQ22 150 DQ54
25 N.C 109 N.C 67 DQ23 151 DQ55
26 VCC 110 VCC 68 VSS 152 VSS
27 /WE 111 /CAS 69 DQ24 153 DQ56
28 DQMB0 112 DQMB4 70 DQ25 154 DQ57
29 DQMB1 113 DQMB5 71 DQ26 155 DQ58
30 /CS0 114 N.C 72 DQ27 156 DQ59
31 N.C 115 /RAS 73 VCC 157 VCC
32 VSS 116 VSS 74 DQ28 158 DQ60
33 A0 117 A1 75 DQ29 159 DQ61
34 A2 118 A3 76 DQ30 160 DQ62
35 A4 119 A5 77 DQ31 161 DQ63
36 A6 120 A7 78 VSS 162 VSS
37 A8 121 A9 79 CLK2 163 CLK3
38 A10 122 A11 (BA0
39 N.C 123 N.C 81 WP 165 SA0
40 VCC 124 VCC 82 SDA 166 SA1
41 VCC 125 CLK1 83 SCL 167 SA2
42 CLK0 126 N.C 84 VCC 168 VCC

Back si

Front si

80 N.C 164 N.C

Back si

Pin Name Function Pin Name Function

VCC Power Supply (3.3V
VSS Ground (0V

CLK# System Clock DQ# Data Input/Output

/CS# Chip Select WP Write Protect

CKE# Clock Enable SDA Data I/O for SPD

A0-A10 Address SCL CLK input f or S P D

A11 Bank Select Address SA# Socket Position Address for SPD
/RAS Row Address Strobe N.C No Connection
/CAS Column Address Strobe

/WE Wri te Enable

DQMB# Data Input/Output Mask

Page 3/11

MSC23S2640E-8BS8 (98.08.19)

,38,42,53,38,20,20,20,

SERIAL PRESENCE DETECT

Byte

No.

0

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
31
32
33
34
35

36-61

62
63

64-71

72

73-90

91, 92

93-125

126
127

128-255

SPD

Remark Notes

Hex Value

80

Defines the number of by tes written int o

SPD memory
08 Total number of by tes of SPD memory 256 byte
04 Fundamental memory type SDRAM

0B Number of rows 11 rows

09 Number of colum ns 9 columns
01 Number of module bank s 1 bank
40 Data width of this assembly 64 bits
00 ... Data width continuation 0
01 Voltage i nterface lev el LVTTL
80 Cycle time (CL=3) CL=3 tCC=8ns
60 Access time f rom CLK (CL=3) CL=3 t
00 DIMM configuration type Non Parity
80 Refresh rate / type Normal / Self
08 Primary SDRAM width x8
00 Error checking SDRAM width
01 Minimum CLK delay t

8F Burst lengths supported 1, 2, 4, 8, F

02 Number of banks on each SDRAM 2 banks
06 /CAS lat enc y 2, 3
01 /CS latenc y 0
01 /WE latency 0
00 SDRAM module attri butes
06 SDRAM device att r ibutes : General

C0 Cycle time (CL=2) CL=2 t
A0 Access time from CLK (CL=2) CL=2 t

00 Cycle time (CL=1) Not support
00 Access time fr om CLK (CL=1) Not support
14 Minimum ROW pulse width tRP=20ns
14 /RAS to /RA S bank delay t
14 /RAS to /CAS delay t
30 Minimum /RA S pr ec har ge time t
04 Density of eac h bank on module 16MB
20
10

Command and addr ess signal input setup time

Command and addr ess signal input hold time

20 Data signal i nput setup time 2ns
10 Data signal i nput hold ti me 1ns

00-00 R.F.U

12 SPD data revision code 1.2

2E Checksum for byte 0- 62

41,45,20,20,20,20,20,20 Manufact ur er ’s JEDE C ID code

01 / 06 Manufacturi ng location

43,32,33,53,32,36,34,30,45,
2D

Manufact ur er ’s part number C23S 2640E - 8B S 8

20

20, 20 Revi si on c ode

00-00 R.F.U

64 Intel speci fication f r equenc y 100MHz

A5 Intel specif ication /CAS latenc y CL= 3

FF-FF Unused storage locat ions

128 byte

: 1 CLK

CCD

=20ns

RRD

=20ns

RCD

=48ns

RAS

2ns
1ns

AC3

CC2
AC2

=6ns

=12ns
=10ns

Page 4/11

MSC23S2640E-8BS8 (98.08.19)

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings

Rating Symbol Value Unit

Voltage on any pin relative to Vss VIN, V
Vcc supply volt age Vcc, VccQ -0.5 to 4.6 V

Storage temperature T
Power dissipation P
Short circuit current I

Operating temperatur e T

stg

D

os

opr

OUT

*

-0.5 to VCC+0.5 V

- 55 to 125 °C
8W

50 mA

0 to 70 °C

*: Ta=25

u

Recommended Operating Conditions

Parameter Symbol Min. Typ. M ax. Unit

Power supply voltage Vcc, VccQ 3.0 3.3 3.6 V
Input high voltage V
Input low voltage V

IH

IL

2.0 - VCC+ 0.3 V

-0.3 - 0.8 V

(Voltages referenced to Vss = 0V)

Capacitance

Parameter Symbol Max. Unit

Input capaci tance (A0-A11, /RAS, /CAS , /WE) C
Input capaci tance (/CS0, /CS2) C
Input capaci tance (DQMB0-DQMB7) C
Input capaci tance (CKE0) C
I/O capacitance (DQ 0- DQ63) C
Input capaci tance (CLK0, CLK2) C

(Vcc=3.3V ± 0.3V, Ta = 25°C f=1MHz)

IN1
IN2
IN3
IN4

I/O

CLK

49 pF
34 pF
22 pF
58 pF
25 pF
50 pF

Page 5/11

MSC23S2640E-8BS8 (98.08.19)

DC CHARACTERISTICS

Parameter Symbol

Bank CKE Others Min Max

Condition

(VCC = 3.3V ± 0.3V, Ta = 0 to 70°C)

Module

Spec.

Unit Note

Input Leakage
Current

Output Leakage
Current

Output High
Voltage

Output Low
Voltage

Aver age P ower
Supply Current
(Operati ng)

Power Supply
Current
(Stand by)

Aver age P ower
Supply Current
(Clock Suspension)

Average Power
Supply Current

(Active Stand by)
Power Supply

Current (Burst)

I

LI

I

LO

V

OH

V

OL

I

1

CC

ICC1D

ICC2

ICC3S

ICC3

ICC4

- - - -80 80

- - - -10 10 uA

I

--

--

= -2mA

OH

I

= 2mA

OL

2.4 - V

-0.4V

tCC=min.

One Bank

Activ e

CKE ≥ V

IH

RC

No Burst

- 680 mA 1, 2

=min

t

tCC=min.

Both
Banks
Activ e

CKE ≥ V

IH

=min

t

RC

=min

t

RRD

No Burst

- 920 mA 1, 2

Both
Banks

CKE ≥ V

IH

tCC=min.

- 320 mA 3

Precharge

Both
Banks

CKE ≤ V

IL

tCC=min.

-24mA2

Activ e

One

Banks

CKE ≥ V

IH

tCC=min.

- 360 mA 3

Activ e

Both
Banks

CKE ≥ V

IH

tCC=min.

- 840 mA 1, 2

uA

Power Supply
Current

(Auto-Refresh)
Average Power

Supply Current
(Self-Refresh)

Average Power
Supply Current

(Power down)

ICC5

ICC6

ICC7

One Bank

Activ e

Both
Banks

Precharge

Both
Banks

Precharge

NOTE: 1. Measured with the output open.

2. The address and data can be changed once or left uncharged during one cycle.

3. The address and data can be changed once or left unchanged during two cycles.

CKE ≥ V

CKE ≤ V

CKE ≤ V

IH

IL

IL

tCC=min.

RC

t

=min.

tCC=min.

tCC=min.

- 640 mA 2

-16mA

-16mA

Page 6/11

MSC23S2640E-8BS8 (98.08.19)

y

MODE SET ADDRESS KEYS

/CAS Latenc

A6 A5 A4 CL A3 BT A2 A1 A0 BT=0 BT=1

0 0 0 Reserved 0 Sequential 0 0 0 1 1
0 0 1 Reserved 1 Interleave 0 0 1 2 2
0102 0104 4
0113 0118 8
1 0 0 Reserved 1 0 0 Reserved Reserved
1 0 1 Reserved 1 0 1 Reserved Reserved
1 1 0 Reserved 1 1 0 Reserved Reserved
1 1 1 Reserved 1 1 1 Full Page Reserved

Note: A7, A8, A9, A10 and A11 should stay "L" during mode set cycle.

Burst Type Burst Length

POW ER ON SEQUE NCE

1. With inputs in NOP state, turn on the power supply and start the system clock.

2. After the VCC voltage has reached the specified level, pause for 200µs or more
with the input kept in NOP state.

3. Issue the precharge all bank command.

4. Apply a CBR auto-refresh eight or more times.

5. Enter the mode register setting command.

Page 7/11

MSC23S2640E-8BS8 (98.08.19)

AC CHARACTERISTIC

NOTE 1, 2 .

Parameter Symbol

Clock Cycle Time

CL=3
CL=2

Access Time from Clock

CL=3

Clock "H" Pulse Time t
Clock "L" Pulse Time t
Input Setup T ime (CLK, ADD, DIN) t
Input Hold T ime (CLK, ADD, DIN) t
Output Low Im pedanc e Time from Clock t
Output Hi gh Impedance Time from Clock t
Output Hol d from Clock t
/RAS Cycle Time t
/RAS Precharge Time t
/RAS Activ e Time t
/RAS to /CAS Delay Time t
Wr ite Recovery Time t
Wr ite Command Input T ime from O utput t
/RAS to /RAS Bank Active Delay Time t
Refresh Ti me t
Power-down Exit Set-up Time t
Input Level Transi tion Ti me t
/CAS to /CAS Delay Time (Min) I
Clock Disabl e Time from CK E I
Data Output High Impedanc e Time from DQM I
Data Input Mask Time from DQ M B I
Data Input Time from Write Command I
Data Output High Inpedance Time I
Active Com mand Input T ime from MODE I

NOTES:

1) AC measurem ents assume that t

=1ns.

T

2) The r eference level for t im ing of input signals is 1.4V.

3) This parameter is m eas ur ed with a load circuit equivalent to 1 TTL load and 50pF
(R

is 50ohm).

Load

4) An acc es s time is measured at 1.4V.

5) If t

is longer than 1ns, t he r eference level for t im ing of input signals are V

T

t

CC

t

AC

CH

CL

SI
HI

OLZ

OHZ

OH
RC

RP
RAS
RCD

WR

OWD

RRD
REF
PDE

T
CCD
CKE
DOZ
DOD

DWD

ROH
MRD

(VCC = 3.3 ± 0. 3V , Ta = 0 ~70°C)

Module Spec.

Min. Max.

Unit Note

8-ns

12 - ns

- 6 ns 3, 4

-10ns3, 4
3-ns
3-ns
2-ns
1-ns
3-ns

-9ns
3-ns

70 - ns
20 - ns
48 100,000 ns
20 - ns

8-ns

20 - ns
20 - ns

-64ms

10 - ns

-3ns

1 Cycle
1 Cycle
2 Cycle
0 Cycle
0 Cycle

CL Cycle

3 Cycle

and V

IH

IL.

OUTPUT

OUTPUT LOAD

1.4v
50
50pF

Page 8/11

Ω

MSC23S2640E-8BS8 (98.08.19)

FUNCTION TRUTH TABL E (Table1) (1/2)

Current State /CS /RAS /CAS /WE BA ADDR Action

Idle H X X X X X NOP

LHHHXXNOP
L H H L BA X ILLEGAL
L H L X BA CA ILLEGAL
L L H H BA RA Row Active
L L H L BA A10 NOP
L L L H X X Auto-Refresh or Self-Refresh
L L L L L OP Code Mode Register write

Row Active H X X X X X NOP

LHHXXXNOP
L H L H BA CA, A10 Read
L H L L BA CA, A10 Write
L L H H BA RA ILLEGAL
L L H L BA A10 Precharge
LLLXXXILLEGAL

Read H X X X X X NOP (Continue Row Active after Burst ends)

L H H H X X NOP (Continue Row Active after Burst ends)
L H H L BA X Reserved
L H L H BA CA, A10 Term Burst, start n ew Burst Rea d
L H L L BA CA, A10 Te rm Bu rs t, sta r t n ew Bu rs t Write
L L H H BA RA ILLEGAL
L L H L BA A10 Term Burst, execute Row Precharge
LLLXXXILLEGAL

Write H X X X X X NOP (Continu e Row Active a fter Burst ends)

L H H H X X NOP (Continue Row Active after Burst ends)
L H H L BA X ILLEGAL
L H L H BA CA, A10 Term Burst, start n ew Burst Rea d
L H L L BA CA, A10 Te rm Bu rs t, sta r t n ew Bu rs t Write
L L H H BA RA ILLEGAL
L L H L BA A10 Term Burst, execute Row Precharge

LLLXXXILLEGAL
Read with H X X X X X
Auto Precharge L H H H X X

NOP (Continue Burst to End and ente r Row Pre charge )
NOP (Continue Burst to End and ente r Row Pre charge )

L H H L BA X ILLEGAL

L H L H BA CA, A10 ILLEGAL

L H L L X X ILLEGAL

L L H X BA RA, A10 ILLEGAL

LLLXXXILLEGAL
Wri te with H X X X X X
Auto Precharge L H H H X X

NOP (Continue Burst to End and ente r Row Pre charge )
NOP (Continue Burst to End and ente r Row Pre charge )

L H H L BA X ILLEGAL

L H L H BA CA, A10 ILLEGAL

L H L L X X ILLEGAL

L L H X BA RA, A10 ILLEGAL

LLLXXXILLEGAL

2
2

4

5

2

2

2

2

2
2

2

2
2

2

Page 9/11

MSC23S2640E-8BS8 (98.08.19)

FUNCTION TRUTH TABL E (Table1) (2/2)

Current State /CS /RAS /CAS /WE BA ADDR Action

Æ

Precharge H X X X X X NOP

LHHHXXNOP

L H H L BA X ILLEGAL

L H L X BA CA ILLEGAL

L L H H BA RA ILLEGAL

L L H L BA A10 NOP

LLLXXXILLEGAL
Write H X X X X X NOP
Recovery L H H H X X NOP

L H H L BA X ILLEGAL

L H L X BA CA ILLEGAL

L L H H BA RA ILLEGAL

L L H L BA A10 ILLEGAL

LLLXXXILLEGAL
Row Active H X X X X X NOP Row Active after t

L H H H X X NOP Row Active after t

L H H L BA X ILLEGAL

L H L X BA CA ILLEGAL

L L H H BA RA ILLEGAL

L L H L BA A10 ILLEGAL

LLLXXXILLEGAL
Refresh H X X X X X NOP Æ Idle after t

LHHXXXNOP

L H L X X X ILLEGAL

L L H X X X ILLEGAL

LLLXXXILLEGAL
Mode Re sister H X X X X X NOP
Access L H H H X X NOP

L H H L X X ILLEGAL

L H L X X X ILLEGAL

L L X X X X ILLEGAL

Idle after t

Æ

Idle after t

2
2
2

4

2
2
2
2

2
2
2
2

Æ

Idle after t

RP
RP

RCD
RCD

RC
RC

ABBREVIATIONS

RA = Row Addres s BA = Bank Address NOP = No Operation c omm and
CA = Column Address AP = Auto Precharge

Notes:

1.

All inputs will be enabled when CKE i s set hi gh for at least 1 cycl e pri or to the inputs.

2.

Illegal to bank i n spec ified st ate, but may be l egal i n som e c ases dependi ng on the s tate of
bank selection.

3.

Satisfy the timing of t

4.

NOP to bank prechar ging or i n idl e s tate. Pr echar ges ac ti vated bank by BA or A10.

5.

Illegal if any bank i s not i dl e.

and tWR to prevent bus contention.

CCD

Page 10/11

MSC23S2640E-8BS8 (98.08.19)

FUNCTION TRUTH TABL E (CKE) (Table2)

Current State (n) CKEn-1 CKEn /CS /RAS /CAS /WE ADDR Action

Self R efresh H X X X X X X INVALID

L H H X X X X Exit S elf Refresh Æ ABI
L H L H H H X Exit S elf Refresh Æ ABI
L H L H H L X ILLEGAL
L H L H L X X ILLEGAL
L H L L X X X ILLEGAL
L L X X X X X NOP (Maintain Self Refresh)

Power Down H X X X X X X INVALID

L H H X X X X Exit Power Down Æ ABI
L H L H H H X Exit Power Down Æ ABI
L H L H H L X ILLEGAL
L H L H L X X ILLEGAL
L H L X X X X ILLEGAL

All Ban k s idle
(ABI) H L H X X X X Enter Power Down

Any State H H X X X X X Refer to Operations in Table 1
Other than H L X X X X X Begin Clock Suspend Ne xt Cycle
Listed Above L H X X X X X Enable Clock of Next Cycle

6

L L X X X X X NOP (Continue power down mode)

H H X X X X X Refer to Table 1

H L L H H H X Enter Power Down
H L L H H L X ILLEGAL
H L L H L X X ILLEGAL
H L L L H L X ILLEGAL
H L L L L H X Enter S elf Refresh
H L L L L L X ILLEGAL

LLXXXXXNOP

L L X X X X X Continue Clock Suspension

6

Notes:

6.

Power-down and s el f refresh can be enter ed onl y when al l the bank s ar e i n an i dle s tate.

Page 11/11