Page 1
Preliminary
MSC23CV23257A-xxBS4¡ Semiconductor
¡ Semiconductor
MSC23CV23257A-xxBS4
2,097,152-Word ¥ 32-Bit DRAM MODULE : FAST PAGE MODE TYPE WITH EDO
DESCRIPTION
The Oki MSC23CV23257A-xxBS4 is a fully decoded 2,097,152-word ¥ 32-bit CMOS dynamic
random access memory composed of four 16-Mb DRAMs (2M ¥ 8) in TSOP packages mounted
with decoupling capacitors on a 72-pin glass epoxy Small Outline DIMM Package supports any
application where high density and large capacity of storage memory are required.
FEATURES
• 2,097,152-word ¥ 32-bit organization
• 72-pin Small Outline DIMM
• Single 3.3 V supply ±0.3 V tolerance
• Input : LVTTL compatible
• Output : LVTTL compatible, 3-state
• Refresh : 2048 cycles/32 ms
• CAS before RAS refresh, CAS before RAS hidden refresh, RAS-only refresh capability
• Multi-bit test mode capability
• Fast Page Mode with EDO capability
PRODUCT FAMILY
Family
MSC23CV23257A-60BS4
MSC23CV23257A-70BS4
Access Time (Max.)
RAC
60 ns
70 ns
t
AA
30 ns
35 ns
t
CAC
15 ns
20 ns
Cycle Time
(Min.)
110 ns
130 ns
Power Dissipation
Operating (Max.)
2160 mW
1872 mW
Standby (Max.)t
14.4 mW
315
Page 2
MSC23CV23257A-xxBS4 ¡ Semiconductor
PIN CONFIGURATION
MSC23CV23257A-xxBS4
(Unit : mm)
2.4 Max.
25.4 ±0.13
3.18 ±0.13
2.0 ±0.13
R2.0
17.78 ±0.13
1.8 ±0.1
2 – φ1.8
3.03
2.62 Typ.
*1
44.45 ±0.1
59.69 ±0.2
44.45 ±0.1
51.66 ±0.1
711
272
3.25 Typ.
5.00
R2.0
5.5 Min.
1.00 ±0.1
1.0 ±0.1
0.25 Max.
0.23 Min.
1.27 ±0.1
316
*1 The common size difference of the board width 19.78 mm of its height is
specified as ±0.2. The value above 19.78 mm is specified as ±0.5.
Page 3
Pin Configuration
MSC23CV23257A-xxBS4¡ Semiconductor
Pin No.
Pin Name
11631
2 173247
3 183348
4 193449
5 203550
6 213651
7 223752
8 233853
9 243954
10 25 40 55
11 26 41 56
12 27 42 57
13 28 43 58
14 29 44 59
15 30 45 60
V
SS
DQ0 A5 A9 WE
DQ1 A6 NC NC
DQ2 A10
DQ3 NC DQ15 DQ19
DQ4 DQ8 NC DQ20
DQ5 DQ9 DQ16 DQ21
DQ6 DQ10 DQ17 DQ22
DQ7 DQ11 V
V
CC
PD1 DQ13 CAS2 DQ24
A0 DQ14 CAS3 DQ25
A1 A7 CAS1 DQ26
A2 NC RAS0 DQ27
A3 V
Pin No.
Pin Name
A4 A8 NC
Pin No.
Pin Name
Pin No.
46
RAS2 DQ18
SS
DQ12 CAS0 NC
CC
NC DQ28
Pin Name
DQ23
Presence Detect Pins
Pin No.
61
62
63
64
65
66
67
68
69
70
71
72
Pin Name
V
CC
DQ29
DQ30
DQ31
NC
PD2
PD3
PD4
PD5
PD6
PD7
V
SS
Pin No.
11 PD1
67 PD3
Pin Name
MSC23CV23257A
-60BS4
V
SS
V
SS
NC69 PD5
MSC23CV23257A
-70BS4
V
SS
NCNC66 PD2
V
SS
NCNC68 PD4
V
SS
NCNC70 PD6
NCNC71 PD7
317
Page 4
MSC23CV23257A-xxBS4 ¡ Semiconductor
BLOCK DIAGRAM
DQ0
A0 - A10
RAS0
CAS0
WE
CAS1
A0 - A10R
RAS
CAS
WE
V
A0 - A10R
RAS
CAS
WE
V
DQ
DQ
DQ1
DQ2
DQ
DQ3
DQ
DQ4
DQ
DQ5
DQ
DQ6
DQ
DQ7
DQ
OE
CC
V
SS
DQ
DQ8
DQ9
DQ
DQ10
DQ
DQ11
DQ
DQ12
DQ
DQ13
DQ
DQ14
DQ
DQ15
DQ
OE
CC
V
SS
RAS2
CAS2
CAS3
V
CC
C1 C4
V
SS
A0 - A10R
RAS
CAS
WE
V
CC
A0 - A10R
RAS
CAS
WE
V
CC
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
V
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
V
DQ16
DQ17
DQ18
DQ19
DQ20
DQ21
DQ22
DQ23
OE
SS
DQ24
DQ25
DQ26
DQ27
DQ28
DQ29
DQ30
DQ31
OE
SS
318
Page 5
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
MSC23CV23257A-xxBS4¡ Semiconductor
Parameter
Voltage on Any Pin Relative to V
Voltage VCC Supply Relative to V
SS
SS
Symbol
V
IN
V
Short Circuit Output Current I
Power Dissipation P
Operating Temperature T
Storage Temperature T
, V
OS
opr
OUT
CC
D
stg
Rating Unit
–0.5 to 4.6 V
–0.5 to 4.6 V
50 mA
4W
0 to 70 °C
–40 to 125 °C
Note: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are
exceeded. Functional operation should be restricted to the conditions as detailed in the
operational sections of this data sheet. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
Recommended Operating Conditions
(Ta = 0°C to 70°C)
Parameter
Power Supply Voltage
Input High Voltage
Input Low Voltage
Symbol
V
CC
V
SS
V
IH
V
IL
Min.
Typ.
3.0 3.3 3.6 V
000V
2.0 — VCC + 0.3 V
–0.3 — 0.8 V
Max.
Unit
Capacitance
Parameter
Symbol
C
IN1
C
IN2
C
IN3
C
IN4
C
DQ
Typ.
Note : Capacitance measured with Boonton Meter.
(Ta = 25°C, f = 1 MHz)
Max.
—27
Unit
pFInput Capacitance (A0 - A10)
pFInput Capacitance (RAS0, RAS2)—20
pFInput Capacitance (CAS0 - CAS3)—13
pFInput Capacitance (WE)—35
pFI/O Capacitance (DQ0 - DQ31) — 13
319
Page 6
MSC23CV23257A-xxBS4 ¡ Semiconductor
DC Characteristics
Parameter
Input Leakage Current
Output Leakage Current
Output High Voltage
Output Low Voltage
Average Power
Supply Current
(Operating)
Power Supply
Current (Standby)
Average Power
Supply Current
(RAS-only Refresh)
Average Power
Supply Current
(CAS before RAS Refresh)
Average Power
Supply Current
(Fast Page Mode)
Symbol
I
LI
I
LO
V
OH
V
OL
I
CC1
I
CC2
I
CC3
I
CC6
I
CC7
Condition
0 V £ VI £ VCC + 0.3 V;
All other pins not
under test = 0 V
disable
D
OUT
0 V £ V
I
OH
I
OL
£ 3.6 V
O
= –2.0 mA
= 2.0 mA
RAS, CAS cycling,
= Min.
t
RC
RAS, CAS = V
IH
RAS, CAS
≥ V
–0.2 V
CC
RAS cycling,
= Min.
,
IH
CAS = V
t
RC
RAS cycling,
CAS before RAS,
= Min.
t
RC
RAS = V
,
IL
CAS cycling,
= Min.
t
HPC
(VCC = 3.3 V ±0.3 V, Ta = 0°C to 70°C)
MSC23CV23257A MSC23CV23257A
-60BS4 -70BS4
Min.
–40
Max.
40
CC
Min.
–40
2.4 V
Max.
40
CC
Unit
µA
µA–10 10 –10 10
V2.4 V
V0 0.4 0 0.4
mA— 600 — 520
mA—8—8
mA—4—4
mA— 600 — 520
mA— 600 — 520
mA— 600 — 520
Note
1, 2
1
1
1, 2
1, 2
1, 3
Notes: 1. ICC Max. is specified as ICC for output open condition.
2. Address can be changed once or less while RAS=VIL.
3. Address can be changed once or less while CAS=VIH.
320
Page 7
MSC23CV23257A-xxBS4¡ Semiconductor
AC Characteristics (1/2)
Parameter
Random Read or Write Cycle Time
Fast Page Mode Cycle Time t
Access Time from RAS t
Access Time from CAS t
Access Time from Column Address t
Access Time from CAS Precharge t
Output Low Impedance Time from CAS t
Output Hold Time from CAS Low t
CAS to Data Output Buffer Turn-off Delay Time
RAS to Data Output Buffer Turn-off Delay Time
WE to Data Output Buffer Turn-off Delay Time
Transition Time t
Refresh Period t
RAS Precharge Time t
RAS Pulse Width t
RAS Pulse Width (Fast Page Mode) t
RAS Hold Time t
CAS Precharge Time t
CAS Pulse Width t
RAS Low to CAS High Delay Time t
CAS High to RAS Low Delay Time t
RAS Hold Time from CAS Precharge t
RAS to CAS Delay Time t
RAS to Column Address Delay Time t
RAS to Second CAS Delay Time t
Row Address Set-up Time t
Row Address Hold Time t
Column Address Set-up Time t
Column Address Hold Time t
Column Address Hold Time from RAS t
Column Address to RAS Lead Time t
Symbol
t
RC
HPC
RAC
CAC
AA
CPA
CLZ
DOH
t
CEZ
t
REZ
t
WEZ
T
REF
RP
RAS
RASP
RSH
CP
CAS
CSH
CRP
RHCP
RCD
RAD
RSCD
ASR
RAH
ASC
CAH
AR
RAL
(V
= 3.3 V ±0.3 V, Ta = 0°C to 70°C) Note 1,2,3,10,11
CC
MSC23CV23257A
-60BS4
Min.
110
25
—
—
—
—
0
0
3
—
40
60
60
15
10
10
40
5
35
20
15
0
10
0
15
40
30
Max.
—
—
60
15
30
35
—
15
50
32
—
10k
100k
—
—
10k
—
—
—
45
30
—
—
—
—
—
—
MSC23CV23257A
-70BS4
Min.
130
30
—
—
—
—
0
0
3
—
50
70
70
20
10
10
45
5
40
20
15
0
10
0
15
45
35
Max.
—
—
70
20
35
40
—
15
50
32
—
10k
100k
—
—
10k
—
—
—
50
35
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns5—5—
ns
ns 7, 8015015
ns 7015015
ns
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns70 —60 —
ns
ns
ns
ns
ns
ns
Note
4, 5, 6
4, 5
4, 6
4
4
7, 8
3
5
6
321
Page 8
MSC23CV23257A-xxBS4 ¡ Semiconductor
AC Characteristics (2/2)
(V
= 3.3 V ±0.3 V, Ta = 0°C to 70°C) Note 1,2,3,10,11
CC
MSC23CV23257A
Min.
0
0
0
0
10
40
10
15
15
0
15
40
5
5
10
-60BS4
Max.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Parameter
Read Command Set-up Time
Read Command Hold Time
Read Command Hold Time referenced to RAS
Write Command Set-up Time
Write Command Hold Time
Write Command Hold Time from RAS
Write Command Pulse Width
Write Command Pulse Width (Output Disable)
Write Command to RAS Lead Time
Write Command to CAS Lead Time
Data-in Set-up Time
Data-in Hold Time
Data-in Hold Time from RAS
CAS Active Delay Time from RAS Precharge
RAS to CAS Set-up Time (CAS before RAS)
RAS to CAS Hold Time (CAS before RAS)ns
WE to RAS Precharge Time (CAS before RAS)
WE Hold Time from RAS (CAS before RAS)
RAS to WE Set-up Time (Test Mode) ns
RAS to WE Hold Time (Test Mode) ns
Symbol
RCS
t
RCH
t
RRH
t
WCS
t
WCH
t
WCR
t
WP
t
WPE
t
RWL
t
CWL
t
DS
t
DH
t
DHR
t
RPC
t
CSR
t
CHR
t
WRP
t
WRH
t
WTS
t
WTH
MSC23CV23257A
-70BS4
Min.
0
0
0
0
15
45
15
20
20
0
15
45
5
5
15
Max.
—t
—
—
—
—
—
—
—
—
—
—
—
—
—
—
10 —10 —
10 —10 —
Unit
ns
ns
ns
ns
ns
ns
ns
ns10 —5—
ns
ns
ns
ns
ns
ns
ns
ns10 —10 —
ns10 —10 —
Note
9
9
322
Page 9
MSC23CV23257A-xxBS4¡ Semiconductor
Notes: 1. A start-up delay of 200 µs is required after power-up, followed by a minimum of eight
initialization cycles (RAS-only refresh or CAS before RAS refresh) before proper device
operation is achieved.
2. The AC characteristics assume tT = 5 ns.
3. VIH (Min.) and VIL (Max.) are reference levels for measuring input timing signals.
Transition times (tT) are measured between VIH and VIL.
4. This parameter is measured with a load circuit equivalent to 2 TTL loads and 100 pF.
5. Operation within the t
t
(Max.) is specified as a reference point only. If t
RCD
t
(Max.) limit, access time is controlled by t
RCD
6. Operation within the t
t
(Max.) is specified as a reference point only. If t
RAD
t
(Max.) limit, access time is controlled by tAA.
RAD
7. t
CEZ
(Max.), t
(Max.) and t
REZ
(Max.) limit ensures that t
RCD
(Max.) limit ensures that t
RAD
(Max.) define the time at which the output achieves
WEZ
CAC
(Max.) can be met.
RAC
is greater than the specified
RCD
.
(Max.) can be met.
RAC
is greater than the specified
RAD
the open circuit condition and are not referenced to output voltage levels.
8. t
9. t
10. The test mode is initiated by performing a WE and CAS before RAS refresh cycle.
and t
CEZ
or t
RCH
This mode is latched and remains in effect until the exit cycle is generated.
must be satisfied for open circuit condition.
REZ
must be satisfied for a read cycle.
RRH
The test mode specified in this data sheet is a 2-bit parallel test function. CA9 is not
used. In a read cycle, if all internal bits are equal, the DQ pin will indicate a high
level. If any internal bits are not equal, the DQ pin will indicate a low level.
The test mode is cleared and the memory device returned to its normal operating
state by performing a RAS-only refresh cycle or a CAS before RAS refresh cycle.
11. In a test mode read cycle, the value of access time parameters is delayed for 5 ns for the
specified value. These parameters should be specified in test mode cycle by adding the above
value to the specified value in this data sheet.
See ADDENDUM I for AC Timing Waveforms
323
Page 10
MSC23CV23257A-xxBS4 ¡ Semiconductor
324
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