1
¡ Semiconductor MSC2323258A-xxBS4/DS4
77
¡ Semiconductor
MSC2323258A-xxBS4/DS4
2,097,152-Word ¥ 32-Bit DRAM MODULE : FAST PAGE MODE TYPE WITH EDO
DESCRIPTION
The Oki MSC2323258A-xxBS4/DS4 is a fully decoded 2,097,152-word ¥ 32-bit CMOS dynamic
random access memory composed of two 16-Mb (1M ¥ 16) DRAMs in SOJ. The mounting of two
DRAMs together with decoupling capacitors on a 72-pin glass epoxy SIMM 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 SIMM
MSC2323258A-xxBS4 : Gold tab
MSC2323258A-xxDS4 : Solder tab
• Single 5 V supply ±10% tolerance
• Input : TTL compatible
• Output : TTL compatible, 3-state, nonlatch
• Refresh : 1024 cycles/16 ms
•CAS before RAS refresh, CAS before RAS hidden refresh, RAS-only refresh capability
• Fast Page Mode with EDO capability
PRODUCT FAMILY
Family Access Time (Max.) Cycle Time
(Min.)
Power Dissipation
Operating (Max.)
Standby (Max.)
tRAC
MSC2323258A-70BS4/DS4 2255 mW 22 mW
tAA tCAC
70 ns 35 ns 20 ns 130 ns
MSC2323258A-60BS4/DS4 2475 mW
60 ns 30 ns 15 ns 110 ns
MSC2323258A-xxBS4/DS4 ¡ Semiconductor
78
PIN CONFIGURATION
MSC2323258A-xxBS4/DS4
Typ.
10.16 Typ.
6.35
101.19 Typ.3.38 Typ.
107.95 ±0.2
1.04 Typ.
95.25
2.03 Typ.
1.27 +0.1
–0.08
9.3 Max.
3.18f
1.27 ±0.2
72
1
* 1
6.35
R1.57
19.0 ±0.2
6.0 Min.
6.35 Typ.
*1 The common size difference of the board width 12.5 mm of its height is
specified as ±0.2. The value above 12.5 mm is specified as ±0.5.
(Unit : mm)
Pin No.
Pin Name
Pin No.
Pin Name
Pin No.
Pin Name
1V
SS 16 A4 31 A8
Pin No.
Pin Name
46 NC
Pin No. Pin Name
67 PD1
Pin No.
Pin Name
61 DQ13
2 DQ0 17 A5 32 A9 47 WE 62 DQ30
3 DQ16 18 A6 33 RAS3 48 NC 63 DQ14
4 DQ1 19 NC 34 RAS2 49 DQ8 64 DQ31
5 DQ17 20 DQ4 35 NC 50 DQ24 65 DQ15
6 DQ2 21 DQ20 36 NC 51 DQ9 66 NC
7 DQ18 22 DQ5 37 NC 52 DQ25 67 PD1
8 DQ3 23 DQ21 38 NC 53 DQ10 68 PD2
9 DQ19 24 DQ6 39 VSS 54 DQ26 69 PD3
10 VCC 25 DQ22 40 CAS0 55 DQ11 70 PD4
11 NC 26 DQ7 41 CAS2 56 DQ27 71 NC
12 A0 27 DQ23 42 CAS3 57 DQ12 72 VSS
13 A1 28 A7 43 CAS1 58 DQ28
14 A2 29 NC 44 RAS0 59 VCC
15 A3 30 Vcc 45 RAS1 60 DQ29
68 PD2
69 PD3
70 PD4
-70BS4/DS4
NC
NC
VSS
NC
-60BS4/DS4
NC
NC
NC
NC
MSC2323258AMSC2323258A
Presence Detect Pins
1
¡ Semiconductor MSC2323258A-xxBS4/DS4
79
BLOCK DIAGRAM
VCC
VSS
C8C1
A0 - A9
VSS VCC
DQ0 DQ0
RAS
LCAS
UCAS
WE
OE
DQ1 DQ1
DQ2 DQ2
DQ15 DQ15
DQ0
DQ1
DQ2
DQ15
A0 - A9
RAS
LCAS
UCAS
WE
OE
VCC VSS
A0 - A9
VSS VCC
DQ0 DQ16
RAS
LCAS
UCAS
WE
OE
DQ1 DQ17
DQ2 DQ18
DQ15 DQ31
DQ0
DQ1
DQ2
DQ15
A0 - A9
RAS
LCAS
UCAS
WE
OE
VCC VSS
CAS3
CAS2
RAS2 RAS3
RAS1RAS0
A0 - A9
CAS0
CAS1
WE
MSC2323258A-xxBS4/DS4 ¡ Semiconductor
80
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
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
Parameter Symbol Unit
Power Supply Voltage VCC
Input High Voltage
Typ.
Min. Max.
4.5 5.0 5.5 V
(Ta = 0°C to 70°C)
VSS 000V
V
IH 2.4 — 6.5 V
VIL –1.0 — 0.8 V
Input Low Voltage
Capacitance
Parameter Symbol Unit
CIN1 pFInput Capacitance (A0 - A9)
Typ. Max.
—27
(Ta = 25°C, f = 1 MHz)
CIN2 pFInput Capacitance (WE)—35
C
IN3 pFInput Capacitance (RAS0 - RAS3)—13
C
IN4 pFInput Capacitance (CAS0 - CAS3)—20
C
DQ pFI/O Capacitance (DQ0 - DQ31) — 20
Note : Capacitance measured with Boonton Meter.
Parameter Symbol Rating Unit
Voltage on Any Pin Relative to VSS VIN, VOUT –1.0 to 7.0 V
Voltage VCC Supply Relative to VSS VCC –1.0 to 7.0 V
Short Circuit Output Current IOS 50 mA
Power Dissipation PD4W
Operating Temperature Topr 0 to 70 °C
Storage Temperature Tstg –40 to 125 °C
1
¡ Semiconductor MSC2323258A-xxBS4/DS4
81
DC Characteristics
All other pins not
Parameter
MSC2323258A
Unit
Condition
Input Leakage Current
Note
ILI µA
1, 2
(VCC = 5 V ±10%, Ta = 0°C to 70°C)
Symbol
0 V £ VI £ 6.5 V;
under test = 0 V
DOUT disable
0 V £ VO £ 5.5 V
IOH = –5.0 mA
IOL = 4.2 mA
RAS, CAS cycling,
tRC = Min.
RAS, CAS = VIH
RAS, CAS
≥ VCC –0.2 V
RAS cycling,
CAS = VIH,
tRC = Min.
RAS cycling,
CAS before RAS,
tRC = Min.
RAS = VIL,
CAS cycling,
tHPC = Min.
Output Leakage Current
Output High Voltage
Output Low Voltage
Average Power
Supply Current
(Operating)
Power Supply
Current (Standby)
Supply Current
(RAS-only Refresh)
Average Power
Supply Current
(CAS before RAS Refresh)
Average Power
Supply Current
(Fast Page Mode)
Average Power
ILO
VOH
VOL
ICC1
ICC2
ICC3
ICC6
ICC7
µA
V
V
mA
mA
mA
mA
mA
mA
Min.
–40
–20
2.4
0
—
—
—
—
—
—
Max.
40
20
VCC
0.4
410
8
4
410
410
410
1
1
1, 2
1, 2
1, 3
-70BS4/DS4
Min.
–40
–20
2.4
0
—
—
—
—
—
—
Max.
40
20
VCC
0.4
450
8
4
450
450
450
MSC2323258A
-60BS4/DS4
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.
MSC2323258A-xxBS4/DS4 ¡ Semiconductor
82
AC Characteristics (1/2)
Parameter
Symbol
Unit
Random Read or Write Cycle Time
Note
(VCC = 5 V ±10%, Ta = 0°C to 70°C) Note 1,2,3
tRC ns
MSC2323258A
Fast Page Mode Cycle Time tHPC ns
Access Time from RAS tRAC ns
Access Time from CAS tCAC ns
Access Time from Column Address tAA ns
Access Time from CAS Precharge tCPA ns
Output Low Impedance Time from CAS tCLZ ns
CAS to Data Output Buffer Turn-off Delay Time
tCEZ ns
Transition Time tTns
Refresh Period tREF ms
RAS Precharge Time tRP ns
RAS Pulse Width tRAS ns
RAS Pulse Width (Fast Page Mode) tRASP ns
RAS Hold Time tRSH ns
CAS Precharge Time tCP ns
CAS Pulse Width tCAS ns
RAS Low to CAS High Delay Time tCSH ns
CAS High to RAS Low Delay Time tCRP ns
RAS to CAS Delay Time tRCD ns
RAS to Column Address Delay Time tRAD ns
Row Address Set-up Time tASR ns
Row Address Hold Time tRAH ns
Column Address Set-up Time tASC ns
Column Address Hold Time tCAH ns
Column Address Hold Time from RAS tAR ns
Column Address to RAS Lead Time tRAL ns
4, 5, 6
4, 5
4, 6
4
7, 8
3
5
6
-70BS4/DS4
MSC2323258A
-60BS4/DS4
4
RAS Hold Time from CAS Precharge tRHCP ns
Min.
130
30
—
—
—
—
0
0
3
—
50
70
70
20
10
10
45
5
20
15
0
10
0
15
45
35
40
Max.
—
—
70
20
35
40
—
15
50
16
—
10k
100k
—
—
10k
—
—
50
35
—
—
—
—
—
—
—
Min.
110
25
—
—
—
—
0
0
3
—
40
60
60
15
10
10
40
5
20
15
0
10
0
15
40
30
35
Max.
—
—
60
15
30
35
—
15
50
16
—
10k
100k
—
—
10k
—
—
45
30
—
—
—
—
—
—
—
Output Hold Time from CAS Low tDOH ns5—5—
RAS to Data Output Buffer Turn-off Delay Time
tREZ ns 7, 8015015
WE to Data Output Buffer Turn-off Delay Time
tWEZ ns 7015015
RAS to Second CAS Delay Time tRSCD ns70 —60 —
1
¡ Semiconductor MSC2323258A-xxBS4/DS4
83
AC Characteristics (2/2)
Parameter
Symbol
Unit
Read Command Hold Time
Note
(VCC = 5 V ±10%, Ta = 0°C to 70°C) Note 1,2,3
tRRH
ns
MSC2323258A
Read Command Hold Time referenced to RAS
tWCS
ns
Write Command Set-up Time
tWCH
ns
Write Command Hold Time
tWCR
ns
Write Command Hold Time from RAS
tWP
ns
Write Command Pulse Width
tRWL
ns
Write Command to RAS Lead Time
tCWL
ns
Write Command to CAS Lead Time
tDS
ns
Data-in Set-up Time
tDH
ns
Data-in Hold Time
tDHR
ns
Data-in Hold Time from RAS
tRPC
ns
CAS Active Delay Time from RAS Precharge
tCSR
ns
RAS to CAS Set-up Time (CAS before RAS)
tCHR
ns
RAS to CAS Hold Time (CAS before RAS)ns
-70BS4/DS4
Read Command Set-up Time
tRCH
ns
Min.
0
0
0
15
45
15
20
20
0
15
45
5
5
15
0
Max.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—tRCS
9
9
MSC2323258A
-60BS4/DS4
Min.
0
0
0
10
40
10
15
15
0
15
40
5
5
10
0
Max.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
tWPE
Write Command Pulse Width (Output Disable)
ns10 —5—
MSC2323258A-xxBS4/DS4 ¡ Semiconductor
84
See ADDENDUM H for AC Timing Waveforms
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 tRCD (Max.) limit ensures that tRAC (Max.) can be met.
tRCD (Max.) is specified as a reference point only. If tRCD is greater than the specified
tRCD (Max.) limit, access time is controlled by tCAC.
6. Operation within the tRAD (Max.) limit ensures that tRAC (Max.) can be met.
tRAD (Max.) is specified as a reference point only. If tRAD is greater than the specified
tRAD (Max.) limit, access time is controlled by tAA.
7. tCEZ (Max.), tREZ (Max.) and tWEZ (Max.) define the time at which the output achieves
the open circuit condition and are not referenced to output voltage levels.
8. tCEZ and tREZ must be satisfied for open circuit condition.
9. tRCH or tRRH must be satisfied for a read cycle.
