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262144-wold x 4-bit CMOS Dynamic Random Access Memory
The Hitachi HM514256 Series
i s
a CMOS dynamic RAM
or-
ganized 262144-word x 4-bit. HM514256 has realized higher
density, higher performance and various functions by employing
1.3 pm CMOS process technology and some new CMOS circuit
design technologies. The HM514256 offers Page Mode as a high
speed access mode.
Multiplexed address input permits the HM514256 to be
packaged in standard 20-pin plastic DIP, 20-pin plastic SOJ and
20-pin plastic ZIP.
Features
High Speed
.....
Access Time 100/120/150 ns
(max)
Lower Power
....
Active
300
mW, Standby 1 l m w
Single 5V (*lo%)
0
PageMode
0
512 refresh cycle
...........
8 ms
-
2 variations of refresh
........
RAS only r e & h
K S
before RAS refresh
Ordering Information
..__
Type No.
Access Time
Package
-
--
HM514256P-10
100
ns
HM514256P-I 2
12011s
300
mil
20
qin Plastic DIP
HMS 14256P-15
150ns
HM514256ZP-10
lOOns
Hhf514256ZP-I 2
12011s
20 pin Plastic ZIP
- -
HM514256ZP-15
l5Ons
HM514256JP-10
lOOns
-
._
HM514256JP-12
12011s
20 pin Plastic
SOJ
HM514256JP-15
l5Ons
Pin Arrangement
HM514256P Series
HM514256JP Series
HYS14256ZP Series
liUl
1 : o z
I C U
ihE
I 'ID
RAS
CTS
p i c
A0
A#
A I
A7
A?
A6
A3
A5
V , C
A4
(Top View)
1
ti01 1
20 1 ' "
w3
1 1 1 1/01
K s
4
I 7
m
sc
5
16
I
IJM 2
19
11 0d
A3 6
15 M
A I 7
I 4 A7
A t 8
13
16
A1
9
I2
AS
r ,
10
(Top View)
1 .
(Bottom
view)
I
352
@
HITACHI
HM514256P Series
(DP-2ONA)
HM514256ZP Series
(ZP-20)
HM514256lP Series
(CP-2OD)
Pin Descriotion
A0
-
A8
Address Inputs
CAS
Column Address Strobe
l/O
-
1/04
Data In/Data
Out
F E
Output Enable
RAS
Row Address Strobe
ReadlWrite Innut
.
~~
.
V c c
Power
(+sV)
V s s
Ground
A0
-
A8
Refresh Address Input
Note)
The Ipoclficetfons of
this device
are m b j e a
to
chang.
without
notlm.
P b a r
m n t a a
your merest
Hipchi's Solos D W .
re@mdiw
s p d f i a t b n r
Block
I
C O " t . 0 1
C0"l . C.l
CO"t.01
Ca*.ol
Circuit
Circuit
Circuit
Circuit
1/01
1/02
1 / 0 3
1/04
Absolute Maximum
Ratings
Voltage on any pin relative to VSS.
......
- l V t o
+7V
Operating temperature,
l a
(Ambient)
.....
0°C to +7OoC
Storage temperature (Ambient)
.........
-55°C to +125OC
Power dissipation
..................
1 W
Short circuit output current
...........
50 mA
Recommended DC Operating Conditions
(Ta
=
0
to
+7A"r\
"
-I
Parameter
Symbol
Min
Typ
Max
Unit
Supply voltage
vcc
4.5
5.0
5.5
v
Input High voltage
VIH
2.4
-
6.5
V
Input
Low
voltage
VIL
-2.0
-
0.8
V
Note)
All
voltages referenced
to
V ~ S .
6
HITAGHI
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