Multiport DRAM. MSM54C864 Datasheet

MSM54C864 DRAM. Datasheet pdf. Equivalent

Part MSM54C864
Description Multiport DRAM
Feature E2L0010-17-Y1 www.DataSheet4U.com ¡ Semiconductor ¡ Semiconductor MSM54C864 65,536-Word ¥ 8-Bit Mul.
Manufacture OKI electronic
Datasheet
Download MSM54C864 Datasheet




MSM54C864
E2L0010-17-Y1
www.DataSheet4U.com
¡¡SemicondSucetormiconductor
MSM54C864
65,536-Word ¥ 8-Bit Multiport DRAM
This versionM: SJaMn5. 41C998864
Previous version: Dec. 1996
DESCRIPTION
The MSM54C864 is a 512Kbit CMOS multiport memory composed of a 65,536-word by 8-bit
dynamic random access memory, RAM port, and a 256-word by 8-bit static serial access memory,
SAM port. The RAM port and SAM port operate independently and asynchronously.
The MSM54C864 supports three types of operation : random access to and from the RAM port,
high speed serial access to and from the SAM port and bidirectional transfer of data between any
selected row in the RAM port and the SAM port. The RAM port and the SAM port can be accessed
independently except when data is being transferred between them internally.
FEATURES
• Single power supply of 5 V ±10% with a built-in VBB generator
• All inputs and outputs: TTL compatible
• Multiport organization
RAM port: 64K word ¥ 8 bits
SAM port: 256 word ¥ 8 bits
• RAM port
Fast page mode, Read-modify-write
CAS before RAS refresh, Hidden refresh
RAS only refresh, Standard write-per-bit
• SAM port
High speed serial
Read / Write capability
Fully static register
256 tap location
• RAM-SAM bidirectional, Read / Write / Pseudo write, Real time read transfer
• Refresh : 256 cycles/4 ms
• Package options:
40-pin 475 mil plastic ZIP (ZIP40-P-475-1.27)
(Product : MSM54C864-xxZS)
40-pin 400 mil plastic SOJ (SOJ40-P-400-1.27)
(Product : MSM54C864-xxJS)
xx indicates speed rank.
PRODUCT FAMILY
Family
MSM54C864-70
MSM54C864-80
MSM54C864-10
Access Time
RAM SAM
70 ns 25 ns
80 ns 25 ns
100 ns 25 ns
Cycle Time
RAM SAM
140 ns 30 ns
150 ns 30 ns
180 ns 30 ns
Power Dissipation
Operating Standby
120 mA
8 mA
110 mA
8 mA
100 mA
8 mA
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MSM54C864
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PIN CONFIGURATION (TOP VIEW)
W5/IO5 1
W7/IO7 3
SE 5
SIO6 7
SIO8 9
SC 11
SIO2 13
SIO4 15
W1/IO1 17
W3/IO3 19
W4/IO4 21
WB/WE 23
NC 25
VSS2 27
A5 29
NC 31
A7 33
A2 35
A0 37
CAS 39
2 W6/IO6
4 W8/IO8
6 SIO5
8 SIO7
10 VSS1
12 SIO1
14 SIO3
16 DT/OE
18 W2/IO2
20 VSS3
22 VCC1
24 RAS
26 A6
28 NC
30 A4
32 VCC2
34 A3
36 A1
38 NC
40 NC
SC 1
SIO1 2
SIO2 3
SIO3 4
SIO4 5
DT/OE 6
W1/IO1 7
W2/IO2 8
W3/IO3 9
W4/IO4 10
VCC1 11
WB/WE 12
NC 13
RAS 14
NC 15
NC 16
A6 17
A5 18
A4 19
VCC2 20
MSM54C864
40 VSS1
39 SIO8
38 SIO7
37 SIO6
36 SIO5
35 SE
34 W8/IO8
33 W7/IO7
32 W6/IO6
31 W5/IO5
30 VSS2
29 NC
28 NC
27 CAS
26 NC
25 A0
24 A1
23 A2
22 A3
21 A7
40-Pin Plastic ZIP
40-Pin Plastic SOJ
Pin Name
A0 - A7
RAS
CAS
DT / OE
WB / WE
W1/IO1 - W8/IO8
SC
SE
SIO1 - SIO8
VCC / VSS
NC
Function
Address Input
Row Address Strobe
Column Address Strobe
Data Transfer / Output Enable
Write per Bit / Write Enable
Write Mask / Data IN, OUT
Serial Clock
Serial Enable
Serial Input / Output
Power Supply (5 V) / Ground (0 V)
No Connection
Note: The same power supply voltage must be provided to every VCC pin, and the same GND
voltage level must be provided to every VSS pin.
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