RAM. MSM5416258B Datasheet

MSM5416258B Datasheet PDF

Part MSM5416258B
Description DYNAMIC RAM
Feature www.DataSheet4U.com OKI Semiconductor MSM5416258B DESCRIPTION Technical Information 262,144-Word .
Manufacture OKI electronic
Datasheet
Download MSM5416258B Datasheet

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MSM5416258B
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OKI Semiconductor
Technical Information
MSM5416258B
262,144-Word x 16-Bit DYNAMIC RAM : FAST PAGE MODE TYPE WITH EDO
DESCRIPTION
The MSM5416258B is a 262,144-word x 16-bit dynamic RAM fabricated in OKI's CMOS silicon gate
technology. The MSM5416258B achieves high integration,high-speed operation,and low-power
consumption due to quadruple polysilicon double metal CMOS. The MSM5416258B is available in a
40-pin plastic SOJ.
FEATURES
• 262,144-word by 16-bit configuration
• Single 5V power supply, ±10% tolerance
• Input :TTL compatible
• Output :TTL compatible, 3-state
• Refresh : 512 cycles/8ms
• Fast page mode with EDO,read modify write capability
• Byte wide control: 2 CAS control
• CAS before RAS refresh, Hidden refresh, RAS only refresh capability
• Package : 40-Pin 400 mil plastic SOJ (SOJ40-P-400)
(Product : MSM5416258B-xxJS) xx : indicates speed rank.
PRODUCT FAMILY
Family
Access Time (Max.)
tRAC tAA tCAC tOEA
Cycle Time (Min.)
tRC tHPC
MSM5416258B-28 28ns 15ns 9ns 9ns
MSM5416258B-30 30ns 16ns 9ns 9ns
48ns
55ns
12ns
13ns
MSM5416258B-35 35ns 19ns 10ns 10ns
60ns
13ns
Power Dissipation
1485mW
1458mW
1430mW
PIN CONFIGURATION ( TOP VIEW )
Vcc
DQ0
DQ1
DQ2
DQ3
Vcc
DQ4
DQ5
DQ6
DQ7
NC
NC
WE
RAS
NC
A0
A1
A2
A3
Vcc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 Vss
39 DQ15
38 DQ14
37 DQ13
36 DQ12
35 Vss
34 DQ11
33 DQ10
32 DQ9
31 DQ8
30 NC
29 LCAS
28 UCAS
27 OE
26 A8
25 A7
24 A6
23 A5
22 A4
21 Vss
Pin Names
A0-A8
RAS
LCAS,UCAS
DQ0-15
WE
OE
Vcc
Vss
NC
Function
Address Input
Row Address Strobe
Column Address Strobe
Data-Input/ Data-Output
Write Enable
Output Enable
Power Supply ( +5V )
Ground ( 0V )
No Connection
Note1 : The same power supply voltage must be
provided to every Vcc pin, and the same
GND voltage level must beprovideded to
every Vss pin.
40Pin 400mil SOJ
REVISION-2 1997.11.10, specification are subject to change without advanced notice.



MSM5416258B
www.DataSheet4U.com
BLOCK DIAGRAM
OE
RAS
LCAS
UCAS
Timing
Generater
I/O
Controller
I/O
Controller
WE
8 Output 8
Buffers
A0~A8
Column
9 Address
Buffer
Internal
Address
Counter
9 Column Decoders
8 Input
Buffers
8
Refresh
Control Clock
Sence amplifier 16 I/O 16
Selector
Row
9 Address 9
Buffer
Row
Deco-
ders
Word
Drivers
Memory
cells
Input
8 Buffers 8
8 Output 8
Buffers
DQ0~DQ7
DQ8~DQ15
Vcc
On Chip
VBB Generater
Vss
FUNCTION TABLE
RAS
H
L
L
L
L
L
L
L
L
Input Pin
LCAS UCAS
**
HH
LH
HL
LL
LH
HL
LL
LL
WE
*
*
H
H
H
L
L
L
H
DQPin
Functinal Mode
OE DQ0~DQ7 DQ8~DQ15
*
High-Z
High-Z
Standby
*
High-Z
High-Z
Refresh
L DOUT
High-Z Lower Byte Read
L
High-Z
DOUT
Upper Byte Read
L DOUT
DOUT
Word Read
H DIN Don`t Care Lower Byte Write
H Don`t Care
DIN Upper Byte Write
H DIN
DIN Word Write
H
High-Z
High-Z
-




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