HM62256A Series
32,768-word
×
8-bit High Speed CMOS Static RAM
The Hitachi HM62256A is a CMOS static RAM
organized 32-kword
×
8-bit. It realizes higher
performance and low power consumption by
employing 0.8 µm Hi-CMOS process technology.
The device, packaged in a 8
×
14 mm TSOP with
thickness of 1.2 mm, 450-mil SOP (foot print pitch
width), 600-mil plastic DIP, or 300-mil plastic DIP,
is available for high density mounting. TSOP
package is suitable for cards, and reverse type
TSOP is also provided. It offers low power
standby power dissipation; therefore, it is suitable
for battery back up system.
Maintenance only
Ordering Information
Type No.
Access time Package
——————————————————————–
HM62256AP-8
85 ns
600-mil
HM62256AP-10
100 ns
28-pin
HM62256AP-12
120 ns
plastic DIP
HM62256AP-15
150 ns
(DP-28)
————————————————–
HM62256ALP-8
85 ns
HM62256ALP-10
100 ns
HM62256ALP-12
120 ns
HM62256ALP-15
150 ns
————————————————–
HM62256ALP-8SL
85 ns
HM62256ALP-10SL
100 ns
HM62256ALP-12SL
120 ns
HM62256ALP-15SL
150 ns
——————————————————————–
HM62256ASP-8
85 ns
300-mil
HM62256ASP-10
100 ns
28-pin
HM62256ASP-12
120 ns
plastic DIP
HM62256ASP-15
150 ns
(DP-28NA)
————————————————–
HM62256ALSP-8
85 ns
HM62256ALSP-10
100 ns
HM62256ALSP-12
120 ns
HM62256ALSP-15
150 ns
————————————————–
HM62256ALSP-8SL 85 ns
HM62256ALSP-10SL 100 ns
HM62256ALSP-12SL 120 ns
HM62256ALSP-15SL 150 ns
——————————————————————–
HM62256AFP-8T
85 ns
450-mil
HM62256AFP-10T
100 ns
28-pin
HM62256AFP-12T
120 ns
plastic SOP
HM62256AFP-15T
150 ns
(FP-28DA)
————————————————–
HM62256ALFP-8T
85 ns
HM62256ALFP-10T
100 ns
HM62256ALFP-12T
120 ns
HM62256ALFP-15T
150 ns
————————————————–
HM62256ALFP-8SLT 85 ns
HM62256ALFP-10SLT 100 ns
HM62256ALFP-12SLT 120 ns
HM62256ALFP-15SLT 150 ns
——————————————————————–
Features
• High speed: Fast Access time 85/100/120/150 ns
(max)
• Low Power
Standby: 5 µW (typ) (L/L-SL version)
Operation: 40 mW (typ) (f = 1 MHz)
• Single 5 V supply
• Completely static memory
No clock or timing strobe required
• Equal access and cycle times
• Common data input and output: Three state
output
• Directly TTL compatible: All inputs and outputs
• Capability of battery back up operation
Note: This device is not available for new application.
1
HM62256A Series
TSOP Series
Type No.
Access time Package
——————————————————————–
HM62256ALT-8
85 ns
8 mm
×
14 mm
HM62256ALT-10
100 ns
32-pin TSOP
HM62256ALT-12
120 ns
(normal type)
HM62256ALT-15
150 ns
(TFP-32DA)
———————————————–
HM62256ALT-8SL 85 ns
HM62256ALT-10SL 100 ns
HM62256ALT-12SL 120 ns
HM62256ALT-15SL 150 ns
——————————————————————–
HM62256A Series
Type No.
Access time Package
——————————————————————–
HM62256ALR-8
85 ns
8 mm
×
14 mm
HM62256ALR-10
100 ns
32-pin TSOP
HM62256ALR-12
120 ns
(reverse type)
HM62256ALR-15
150 ns
(TFP-32DAR)
———————————————–
HM62256ALR-8SL 85 ns
HM62256ALR-10SL 100 ns
HM62256ALR-12SL 120 ns
HM62256ALR-15SL 150 ns
——————————————————————–
Pin Arrangement
HM62256AP/AFP/ASP Series
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
(Top view)
HM62256AT Series
OE
A11
NC
A9
A8
A13
WE
V
CC
A14
A12
A7
A6
A5
NC
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A10
CS
NC
I/O7
I/O6
I/O5
I/O4
I/O3
V
SS
I/O2
I/O1
I/O0
A0
NC
A1
A2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
WE
A13
A8
A9
A11
OE
A10
CS
I/O7
I/O6
I/O5
I/O4
I/O3
HM62256AR Series
A3
A4
NC
A5
A6
A7
A12
A14
V
CC
WE
A13
A8
A9
NC
A11
OE
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A2
A1
NC
A0
I/O0
I/O1
I/O2
V
SS
I/O3
I/O4
I/O5
I/O6
I/O7
NC
CS
A10
(Top view)
(Top view)
2
HM62256A Series
Pin Description
Symbol
Function
——————————————————————–
A0 – A14
Address
——————————————————————–
I/O0 – I/O7
Input/output
——————————————————————–
CS
Chip select
——————————————————————–
WE
Write enable
——————————————————————–
HM62256A Series
Symbol
Function
——————————————————————–
OE
Output enable
——————————————————————–
NC
No connection
——————————————————————–
V
CC
Power supply
——————————————————————–
V
SS
Ground
——————————————————————–
Block Diagram
A5
A4
A3
A11
A9
A8
A12
A7
A6
•
•
•
•
•
•
•
•
V
CC
V
SS
Row
Decoder
•
•
Memory Matrix
512
×
512
I/O0
•
•
•
•
•
•
•
•
•
•
•
•
Column I/O
Column Decoder
•
•
Input
Data
Control
•
•
•
•
•
I/O7
A0 A1 A2 A10 A13 A14
•
•
CS
WE
OE
Timing Pulse Generator
Read/Write Control
3
HM62256A Series
Function Table
HM62256A Series
WE
CS
OE
Mode
V
CC
current
I/O pin
Ref. cycle
———————————————————————————————————————————————–
X
H
X
Not selected
I
SB
, I
SB1
High-Z
—
———————————————————————————————————————————————–
H
L
H
Output disable
I
CC
High-Z
—
———————————————————————————————————————————————–
H
L
L
Read
I
CC
Dout
Read cycle (1)–(3)
———————————————————————————————————————————————–
L
L
H
Write
I
CC
Din
Write cycle (1)
———————————————————————————————————————————————–
L
L
L
Write
I
CC
Din
Write cycle (2)
———————————————————————————————————————————————–
Note: X: H or L
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
———————————————————————————————————————————————–
Voltage on any pin relative to V
SS
V
T
–0.5
*1
to +7.0
V
———————————————————————————————————————————————–
Power dissipation
P
T
1.0
W
———————————————————————————————————————————————–
Operating temperature
Topr
0 to +70
°C
———————————————————————————————————————————————–
Storage temperature
Tstg
–55 to +125
°C
———————————————————————————————————————————————–
Storage temperature under bias
Tbias
–10 to +85
°C
———————————————————————————————————————————————–
Note: 1. V
T
min = –3.0 V for pulse half-width
≤
50 ns
Recommended DC Operating Conditions
(Ta = 0 to +70°C)
Parameter
Symbol
Min
Typ
Max
Unit
———————————————————————————————————————————————–
Supply voltage
V
CC
4.5
5.0
5.5
V
———————————————————————————————–
V
SS
0
0
0
V
———————————————————————————————————————————————–
Input high (logic 1) voltage
V
IH
2.2
—
6.0
V
———————————————————————————————————————————————–
Input low (logic 0) voltage
V
IL
–0.5
*1
—
0.8
V
———————————————————————————————————————————————–
Note: 1. V
IL
min = –3.0 V for pulse half-width
≤
50 ns
4
HM62256A Series
HM62256A Series
DC Characteristics
(Ta = 0 to +70°C, V
CC
= 5 V ± 10%, V
SS
= 0 V)
Parameter
Symbol Min
Typ
*1
Max
Unit Test conditions
———————————————————————————————————————————————–
Input leakage current
|I
LI
|
—
—
1
µA
Vin = V
SS
to V
CC
———————————————————————————————————————————————–
Output leakage current
|I
LO
|
—
—
1
µA
CS
= V
IH
or
OE
= V
IH
or
WE
= V
IL
,
V
I/O
= V
SS
to V
CC
———————————————————————————————————————————————–
Operating V
CC
current
I
CC
—
6
15
mA
CS
= V
IL
, others = V
IH
/V
IL
Iout = 0 mA
——————————————————————————————————————————
HM62256A-8 I
CC1
—
33
50
mA
min cycle, duty = 100%, I
I/O
= 0 mA
HM62256A-10
—
30
50
CS
= V
IL
, others = V
IH
/V
IL
HM62256A-12
—
27
45
HM62256A-15
—
24
40
——————————————————————————————————————————
I
CC2
—
5
15
mA
Cycle time = 1µs, I
I/O
= 0 mA
CS
= V
IL
, V
IH
= V
CC
, V
IL
= 0
———————————————————————————————————————————————–
Standby V
CC
current
I
SB
—
0.3
2
mA
CS
= V
IH
———————————————————————————————————
I
SB1
—
0.01
1
mA
Vin
≥
0 V
——————————————
CS
≥
V
CC
– 0.2 V
—
0.3
*2
100
*2
µA
——————————————
—
0.3
*3
50
*3
µA
———————————————————————————————————————————————–
Output low voltage
V
OL
—
—
0.4
V
I
OL
= 2.1 mA
———————————————————————————————————————————————–
Output high voltage
V
OH
2.4
—
—
V
I
OH
= –1.0 mA
———————————————————————————————————————————————–
Notes: 1. Typical values are at V
CC
= 5.0 V, Ta = +25°C and not guaranteed.
2. This characteristics is guaranteed only for L-version.
3. This characteristics is guaranteed only for L-SL version.
Capacitance
(Ta = 25°C, f = 1 MHz)
*1
Parameter
Symbol
Min
Typ
Max
Unit
Test conditions
———————————————————————————————————————————————–
Input capacitance
Cin
—
—
6
pF
Vin = 0 V
———————————————————————————————————————————————–
Input/output capacitance
C
I/O
—
—
8
pF
V
I/O
= 0 V
———————————————————————————————————————————————–
Note: 1. This parameter is sampled and not 100% tested.
5
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
