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PDF MK4564E-12 Data sheet ( Hoja de datos )
| Número de pieza | MK4564E-12 | |
| Descripción | 65536 x 1-Bit DRAM | |
| Fabricantes | United Technologies Mostek | |
| Logotipo |  |
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! tUNITED
TECHNOLOGIES
MOSTEK
MEMORY
COMPONENTS
65,536 x 1-BIT DYN(AMIC RAM
MK4564 P/N/J/E)-12
FEATURES
o Recognized industry standard 16-pin configuration
from Mostek
o Single +6 V (± 1()oAI) supply operation
o On chip substrate bias generator for optimum
performance
o Low power: 330 mW active, max
22 mW standby, max
o 120 ns access time, 220 ns cycle time
o Extended Dour hold using CAS control (Hidden Refresh)
o Common 1/0 capability using "early write"
o Read, Write, Read-Write, Read-Modify-Write and Page-
Mode capability
•
o All inputs TIL compatible, low capacitance, and
protected against static charge
o Scaled POLY 6™ technology
o 128 refresh cycles (2 msec)
Pin 9 is not needed for refresh
DESCRIPTION
The MK4664 is the new generation dynamic RAM.
Organized 66,636 words by 1 bit, it is the successor to the
industry standard MK4116. The MK4664 utilizes Mostek's
Scaled Poly 6 process technology as well as advanced
circuit techniques to provide wide operating margins, both
internally and to the system user. The use of dynamic
circuitry throughout, including the 612 sense amplifiers,
assures that power dissipation is minimized without any
sacrifice in speed or internal and external operating
margins. Refresh characteristics have been chosen to
maximize yield (low cost to user) while maintaining
compatibility between dynamic RAM generations.
PIN FUNCTIONS
Ao-A7
CAs (CE)
D(N(D)
DoUT (0)
Address Inputs
Column Address
Strobe
Data In
Data Out
RAS (RE)
WRiTE (Wi
Vee
Vss
N!C
Row Address
Strobe
Read!
Write Input
Power (5V)
GND
Not Connected
Multiplexed address inputs (a feature dating back to the
industry standard MK4096, 1973) permits the MK4664 to
be packaged in a standard 16-pin DIP with only 16 pins
required for basic functionality. The MK4664 is designed to
be compatible with the JEDEC standards for the 64K x 1
dynamic RAM.
The output ofthe MK4664 can be held valid up to 10 J.Lsec by
holding CAS active low. This is quite useful since refresh
cycles can be performed while holding data valid from a
previous cycle. This feature is referred to as Hidden Refresh.
The 64K RAM from Mostek is the culmination of several
years of circuit and process development, proven in
predecessor products.
PIN OUT
Figure 1
DUAL-IN-LiNE PACKAGE LEADLESS CHIP CARRIER
D'N (D) 2
WRITE(W) 3
m(RE) 4
Ao 6
A, 7
Vcc 8
16 Vss
16 CAs(eE)
14 DOUT (0)
13 AI
12 A,
11 A.
10 As
9 A7
WfiiTE(WI 3 I
linlll'!'l ~J
N/C ~J
AO iJ
A2 [J
TOP VIEW
[~ Dou.,.!Q)
[Th Ae
L!.4 N/C
[ij A3
CD A4
Available soon in MIL-STD-883 Class B (MKB).
IV-61
1 page  
READ CYCLE
Figure 2
V_
ADDRESSES 1H
V 1L -
WRiTE
Dour
V_
1H
V 1L -
I.--tCAC'--......~
1 4 - - - - - - t R A C - - - - -.......~
V_
OH
VOL .... ------------------------OPEN---------~--------~
WRITE CYCLE (EARLY WRITE)
Figure 3
RAS
V_
1H
V 1L -
CAS
V 1H -
V 1L -
ADDRESSES
V_
1H
V 1L -
WRITE
V 1H -
V 1L -
•
l o 4 - - - - tOHR -----~
VOH- OPEN__________________________________ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
V OL-
IV-65
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MK4564E-12.PDF ] | |
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