HM62V16256CI Series
Wide Temperature Range Version
4 M SRAM (256-kword
16-bit)
ADE-203-1230A (Z)
Rev. 1.0
Feb. 6, 2001
Description
The Hitachi HM62V16256CI Series is 4-Mbit static RAM organized 262,144-word
16-bit.
HM62V16256CI Series has realized higher density, higher performance and low power consumption by
employing CMOS process technology (6-transistor memory cell). It offers low power standby power
dissipation; therefore, it is suitable for battery backup systems. It is packaged in standard 44-pin plastic
TSOPII.
Features
Single 2.5 V and 3.0 V supply: 2.2 V to 3.6 V
Fast access time: 70 ns (max)
Power dissipation:
Active: 5.0 mW/MHz (typ)(V
CC
= 2.5 V)
: 6.0 mW/MHz (typ) (V
CC
= 3.0 V)
Standby: 2 W (typ) (V
CC
= 2.5 V)
: 2.4 W (typ) (V
CC
= 3.0 V)
Completely static memory.
No clock or timing strobe required
Equal access and cycle times
Common data input and output.
Three state output
Battery backup operation.
2 chip selection for battery backup
Temperature range: 40 to +85
C
HM62V16256CI Series
5
Operation Table
CS1
CS2
WE
OE
UB
LB
I/O0 to I/O7
I/O8 to I/O15
Operation
H
High-Z
High-Z
Standby
L
High-Z
High-Z
Standby
H
H
High-Z
High-Z
Standby
L
H
H
L
L
L
Dout
Dout
Read
L
H
H
L
H
L
Dout
High-Z
Lower byte read
L
H
H
L
L
H
High-Z
Dout
Upper byte read
L
H
L
L
L
Din
Din
Write
L
H
L
H
L
Din
High-Z
Lower byte write
L
H
L
L
H
High-Z
Din
Upper byte write
L
H
H
H
High-Z
High-Z
Output disable
Note: H:
V
IH
, L: V
IL
,
: V
IH
or V
IL
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Power supply voltage relative to V
SS
V
CC
0.5 to + 4.6
V
Terminal voltage on any pin relative to V
SS
V
T
0.5*
1
to V
CC
+ 0.3*
2
V
Power dissipation
P
T
1.0
W
Storage temperature range
Tstg
55 to +125
C
Storage temperature range under bias
Tbias
40 to +85
C
Notes: 1. V
T
min: 3.0 V for pulse half-width
30 ns.
2. Maximum voltage is +4.6 V.
DC Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Note
Supply voltage
V
CC
2.2
2.5/3.0
3.6
V
V
SS
0
0
0
V
Input high voltage
V
CC
= 2.2 V to 2.7 V V
IH
2.0
--
V
CC
+ 0.3
V
V
CC
= 2.7 V to 3.6 V V
IH
2.2
--
V
CC
+ 0.3
V
Input low voltage
V
CC
= 2.2 V to 2.7 V V
IL
0.2
--
0.4
V
1
V
CC
= 2.7 V to 3.6 V V
IL
0.3
--
0.6
V
1
Ambient temperature range
Ta
40
--
85
C
Note:
1. V
IL
min: 3.0 V for pulse half-width
30 ns.