HM514260C Series
HM51S4260C Series
262,144-word
×
16-bit Dynamic Random Access Memory
ADE-203-260A (Z)
Rev. 1.0
Jun. 12, 1995
Description
The Hitachi HM51(S)4260C is CMOS dynamic RAM organized as 262,144-word
×
16-bit. HM51(S)4260C
has realized higher density, higher performance and various functions by employing 0.8
µm
CMOS process
technology and some new CMOS circuit design technologies. The HM51(S)4260C offers fast page mode as a
high speed access mode. Multiplexed address input permits the HM51(S)4260C to be packaged in standard
400-mil 40-pin plastic SOJ and standard 400-mil 44-pin plastic TSOPII. Internal refresh timer enables
HM51S4260C self refresh operation.
Features
•
•
•
Single 5 V (±10%) (HM51(S)4260C-6/7/8)
(±5%) (HM51(S)4260C-6R)
High speed
— Access time: 60 ns/70 ns/80 ns (max)
Low power dissipation
— Active mode: 825 mW/788 mW/770 mW/688 mW (max)
— Standby mode: 11 mW (max) (HM51(S)4260C-6/7/8)
10.5 mW (max) (HM51(S)4260C-6R)
1.1 mW (max) (L-version) (HM51(S)4260C-6/7/8)
1.05 mW (max) (L-version) (HM51(S)4260C-6R)
Fast page mode capability
512 refresh cycles: 8 ms
128 ms (L-version)
2
CAS-byte
control
2 variations of refresh
—
RAS-only
refresh
—
CAS-before-RAS
refresh
Battery backup operation (L-version)
Self refresh operation (HM51S4260C)
•
•
•
•
•
•
HM514260C, HM51S4260C Series
Ordering Information
Type No.
HM514260CJ-6
HM514260CJ-6R
HM514260CJ-7
HM514260CJ-8
HM514260CLJ-6
HM514260CLJ-6R
HM514260CLJ-7
HM514260CLJ-8
HM51S4260CJ-6
HM51S4260CJ-6R
HM51S4260CJ-7
HM51S4260CJ-8
HM51S4260CLJ-6
HM51S4260CLJ-6R
HM51S4260CLJ-7
HM51S4260CLJ-8
HM514260CTT-6
HM514260CTT-6R
HM514260CTT-7
HM514260CTT-8
HM514260CLTT-6
HM514260CLTT-6R
HM514260CLTT-7
HM514260CLTT-8
HM51S4260CTT-6
HM51S4260CTT-6R
HM51S4260CTT-7
HM51S4260CTT-8
HM51S4260CLTT-6
HM51S4260CLTT-6R
HM51S4260CLTT-7
HM51S4260CLTT-8
Access Time
60 ns
60 ns
70 ns
80 ns
60 ns
60 ns
70 ns
80 ns
60 ns
60 ns
70 ns
80 ns
60 ns
60 ns
70 ns
80 ns
60 ns
60 ns
70 ns
80 ns
60 ns
60 ns
70 ns
80 ns
60 ns
60 ns
70 ns
80 ns
60 ns
60 ns
70 ns
80 ns
400-mill 44-pin plastic TSOP II (TTP-44/40DB)
Package
400-mill 40-pin plastic SOJ (CP-40DA)
2
HM514260C, HM51S4260C Series
Pin Arrangement
HM514260CJ/CLJ Series
HM51S4260CJ/CLJ Series
V
CC
I/O0
I/O1
I/O2
I/O3
V
CC
I/O4
I/O5
I/O6
I/O7
NC
NC
WE
RAS
NC
A0
A1
A2
A3
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
V
SS
I/O15
I/O14
I/O13
I/O12
V
SS
I/O11
I/O10
I/O9
I/O8
NC
LCAS
UCAS
OE
A8
A7
A6
A5
A4
V
SS
HM514260CTT/CLTT Series
HM51S4260CTT/CLTT Series
V
CC
I/O0
I/O1
I/O2
I/O3
V
CC
I/O4
I/O5
I/O6
I/O7
1
2
3
4
5
6
7
8
9
10
44
43
42
41
40
39
38
37
36
35
V
SS
I/O15
I/O14
I/O13
I/O12
V
SS
I/O11
I/O10
I/O9
I/O8
(Top view)
NC
NC
WE
RAS
NC
A0
A1
A2
A3
V
CC
13
14
15
16
17
18
19
20
21
22
32
31
30
29
28
27
26
25
24
23
NC
LCAS
UCAS
OE
A8
A7
A6
A5
A4
V
SS
(Top view)
Pin Description
Pin Name
A0 to A8
Function
Address input
–Row
address
–Column
address
–Refresh
address
Data-in/data-out
Row address strobe
Column address strobe
Read/write enable
Output enable
Power (+5 V)
Ground
No connection
A0 to A8
A0 to A8
A0 to A8
I/O0 to I/O15
RAS
UCAS, LCAS
WE
OE
V
CC
V
SS
NC
3
I/O5
I/O7
I/O6
I/O4
WE
I/O5
Buffer
I/O4
Buffer
I/O6
Buffer
I/O7
Buffer
RAS
Row
Decoder
Block Diagram
Row
Decoder
256 k Memory Array Mat
256 k Memory Array Mat
I/O Bus & Column Decoder
256 k Memory Array Mat
256 k Memory Array Mat
I/O Bus & Column Decoder
Row
Decoder
I/O3
I/O3
Buffer
Selector
Selector
I/O Bus & Column Decoder
Address
I/O2
I/O2
Buffer
256 k Memory Array Mat
Row
Row
Decoder Decoder
Row
Row
Decoder Decoder
256 k Memory Array Mat
I/O1
I/O1
Buffer
Selector
Selector
I/O Bus & Column Decoder
HM514260C, HM51S4260C Series
A0,A1,A2,A3
Row
Decoder
256 k Memory Array Mat
I/O0
I/O0
Buffer
256 k Memory Array Mat
Peripheral Circuit
4
I/O15
I/O15
Buffer
Row
Decoder
I/O14
I/O14
Buffer
Peripheral Circuit
Peripheral Circuit
Row
Decoder
256 k Memory Array Mat
256 k Memory Array Mat
I/O Bus & Column Decoder
256 k Memory Array Mat
Address A4,A5
Selector
Selector
I/O Bus & Column Decoder
256 k Memory Array Mat
I/O13
Buffer
I/O13
Row
Row
Decoder Decoder
Row
Row
Decoder Decoder
A6,A7,A8
256 k Memory Array Mat
256 k Memory Array Mat
Selector
Selector
I/O Bus & Column Decoder
I/O Bus & Column Decoder
I/O12
I/O12
Buffer
Row
Decoder
Row
Decoder
256 k Memory Array Mat
I/O8
Buffer
256 k Memory Array Mat
I/O11
Buffer
I/O9
Buffer
I/O10
I/O10
Buffer
I/O11
I/O8
I/O9
LCAS
UCAS
OE
HM514260C, HM51S4260C Series
Operation Mode
The HM51(S)4260C series has the following 11 operation modes.
1. Read cycle
2. Early write cycle
3. Delayed write cycle
4.
5.
6.
7.
Read- modify-write cycle
RAS-only
refresh cycle
CAS-before-RAS
refresh cycle
Self refresh cycle(HM51S4260C)
8. Fast page mode read cycle
9. Fast page mode early write cycle
10. Fast page mode delayed write cycle
11. Fast page mode read- modify-write cycle
Inputs
RAS
H
H
L
L
L
L
L
H to L
LCAS
H
L
L
L
L
L
H
H
L
L
L
L
L
L
L
H to L
H to L
H to L
H to L
L
UCAS
H
L
L
L
L
L
H
L
H
L
H to L
H to L
H to L
H to L
L
H
L*
2
L*
2
H to L
H
L
D
H
L to H
H
Valid
Open
Undefined
Valid
Open
Fast page mode read cycle
Fast page mode early write cycle
Fast page mode delayed write cycle
Fast page mode read-modify-write cycle
Read cycle (Output disabled)
WE
D
H
H
L*
2
L*
2
H to L
D
D
OE
D
L
L
D
H
L to H
D
D
Output
Open
Valid
Valid
Open
Undefined
Valid
Open
Open
Operation
Standby
Standby
Read cycle
Early write cycle
Delayed write cycle
Read-modify-write cycle
RAS-only
refresh cycle
CAS-before-RAS
refresh cycle
Self refresh cycle (HM51S4260C)
Notes: 1. H: High(inactive) L: Low(active) D: H or L
2. t
WCS
≥
0 ns
Early write cycle
t
WCS
< 0 ns
Delayed write cycle
3. Mode is determined by the OR function of the
UCAS
and
LCAS.
(Mode is set by the earliest of
UCAS
and
LCAS
active edge and reset by the latest of
UCAS
and
LCAS
inactive edge.) However
write OPERATION and output HIZ control are done independently by each
UCAS, LCAS.
ex. if
RAS
= H to L,
LCAS
= L,
UCAS
= H, then
CAS-before-RAS
refresh cycle is selected.
5
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