MC74ACT259 [ONSEMI]
8-BIT ADDRESSABLE LATCH; 8位可寻址锁存器
| 型号： | MC74ACT259 |
| 厂家： | 
ONSEMI |
| 描述： | 8-BIT ADDRESSABLE LATCH |
| 文件： | 总9页 (文件大小：239K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
8-BIT
ADDRESSABLE
LATCH
The MC74AC259/74ACT259 is a high-speed 8-bit addressable latch designed for
general purpose storage applications in digital systems. It is a multifunctional device
capable of storing single line data in eight addressable latches, and also a 1-of-8
decoder and demultiplexer with active HIGH outputs. The device also incorporates
an active LOW Common Clear for resetting all latches, as well as an active LOW
Enable. It is functionally identical to the ALS259 8-bit addressable latch.
• Serial-to-Parallel Conversion
• Eight Bits of Storage with Output of Each Bit Available
• Random (Addressable) Data Entry
• Active High Demultiplexing or Decoding Capability
• Easily Expandable
• Common Clear
N SUFFIX
CASE 648-08
PLASTIC
FUNCTIONAL DESCRIPTION
The MC74AC259/74ACT259 has four modes of operation as shown in the Mode
Selection Table. In the addressable latch mode, data on the Data line (D) is written
into the addressed latch. The addressed latch will follow the data input with all non-
addressed latches remaining in their previous states in the memory mode. All latches
remain in their previous state and are unaffected by the Data or Address inputs.
In the one-of-eight decoding or demultiplexing mode, the addressed output will
follow the state of the D input with all other outputs in the LOW state. In the clear
mode all outputs are LOW and unaffected by the address and data inputs. When
operating the MC74AC/ACT259 as an addressable latch, changing more than one
bit of the address could impose a transient wrong address. Therefore, this should
only be done while in the memory mode. The Mode Select Function Table
summarizes the operations of the MC74AC/ACT259.
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
V
MR
15
E
D
Q
Q
Q
Q
4
CC
16
7
6
5
14
13
12
11
10
9
E
D
A
A
A
0
1
2
MR Q
Q
Q
Q
Q
Q
Q
Q
0
1
2
3
4
5
6 7
1
2
3
4
5
6
7
8
A
A
A
Q
Q
Q
Q
3
GND
0
1
2
0
1
2
FACT DATA
5-1
MC74AC259 MC74ACT259
MODE SELECT TABLE
E
MR
Mode
L
H
L
H
H
L
Addressable Latch
Memory
Active HIGH 8-Channel Demultiplexer
Clear
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
MODE SELECT-FUNCTION TABLE
Inputs
Outputs
Operating
Mode
MR
L
E
H
D
X
A
A
A
Q
Q
Q
Q
Q
Q
Q
Q
7
0
1
2
0
1
2
3
4
5
6
Master Reset
X
X
X
L
L
L
L
L
L
L
L
L
L
L
•
•
•
L
L
L
•
•
•
d
d
d
•
•
•
L
H
L
•
•
•
L
L
H
•
•
•
L
L
L
•
•
•
Q = d
L
L
L
L
L
L
•
•
•
L
L
L
•
•
•
L
L
L
•
•
•
L
L
L
•
•
•
L
L
L
•
•
•
L
L
•
•
•
Q = d
L
•
•
•
Demultiplex
(Active HIGH
Decoder when
D = H)
Q = d
•
•
•
L
L
d
H
H
H
L
L
L
L
L
L
L
Q = d
Store
(Do Nothing)
H
H
X
X
X
X
q
q
q
q
q
q
q
q
0
1
1
2
3
4
5
6
7
H
H
H
•
•
•
L
L
L
•
•
•
d
d
d
•
•
•
L
H
L
•
•
•
L
L
H
•
•
•
L
L
L
•
•
•
Q = d
q
q
2
q
2
q
3
q
3
q
3
q
4
q
4
q
4
q
5
q
5
q
5
q
6
q
6
q
6
q
7
q
7
q
7
q
0
q
0
Q = d
q
1
Q = d
Addressable
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
H
L
d
H
H
H
q
0
q
1
q
2
q
3
q
4
q
5
q
6
Q = d
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
d = HIGH or LOW Data one setup time prior to the LOW-to-HIGH Enable transition
q = Lower case letters indicate the state of the referenced output established during the last cycle in which it was addressed
or cleared.
FACT DATA
5-2
MC74AC259 MC74ACT259
Q
Q
Q
7
6
5
MR
Q
Q
Q
Q
4
3
2
1
A
A
2
1
A
0
D
E
Q
0
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
FACT DATA
5-3
MC74AC259 MC74ACT259
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
V
V
V
DC Supply Voltage (Referenced to GND)
–0.5 to +7.0
CC
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
–0.5 to V
+0.5
V
in
CC
V
out
–0.5 to V
+0.5
V
CC
I
I
I
±20
mA
mA
mA
°C
in
DC Output Sink/Source Current, per Pin
±50
±50
out
CC
DC V
or GND Current per Output Pin
Storage Temperature
CC
T
stg
–65 to +150
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
2.0
4.5
0
Typ
5.0
5.0
Max
6.0
Unit
V
′AC
V
V
Supply Voltage
CC
′ACT
5.5
, V
in out
DC Input Voltage, Output Voltage (Ref. to GND)
V
CC
V
V
CC
V
CC
V
CC
V
CC
V
CC
@ 3.0 V
@ 4.5 V
@ 5.5 V
@ 4.5 V
@ 5.5 V
150
40
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
ns/V
t , t
r
f
25
10
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
t , t
ns/V
r
f
8.0
T
Junction Temperature (PDIP)
Operating Ambient Temperature Range
Output Current — High
140
85
°C
°C
J
T
A
–40
25
I
I
–24
24
mA
mA
OH
Output Current — Low
OL
1. V from 30% to 70% V ; see individual Data Sheets for devices that differ from the typical input rise and fall times.
in
CC
2. V from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
in
FACT DATA
5-4
MC74AC259 MC74ACT259
DC CHARACTERISTICS
Symbol
74AC
= +25°C
74AC
T
A
=
V
(V)
CC
Parameter
Unit
Conditions
T
A
–40°C to +85°C
Typ
Guaranteed Limits
V
V
V
3.0
4.5
5.5
1.5
2.25
2.75
2.1
3.15
3.85
2.1
3.15
3.85
V
= 0.1 V
– 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
or V
CC
= 0.1 V
OUT
3.0
4.5
5.5
1.5
2.25
2.75
0.9
1.35
1.65
0.9
1.35
1.65
V
Maximum Low Level
Input Voltage
IL
or V
– 0.1 V
CC
3.0
4.5
5.5
2.99
4.49
5.49
2.9
4.4
5.4
2.9
4.4
5.4
I
= –50 µA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IN IL IH
3.0
4.5
5.5
2.56
3.86
4.86
2.46
3.76
4.76
–12 mA
–24 mA
–24 mA
V
V
I
OH
V
OL
3.0
4.5
5.5
0.002
0.001
0.001
0.1
0.1
0.1
0.1
0.1
0.1
I = 50 µA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN IL
IH
3.0
4.5
5.5
0.36
0.36
0.36
0.44
0.44
0.44
12 mA
V
I
24 mA
24 mA
OL
I
IN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
V = V , GND
I
CC
I
I
I
5.5
5.5
75
mA
mA
V
V
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OHD
CC
OLD
–75
= 3.85 V Min
OHD
Maximum Quiescent
Supply Current
5.5
8.0
80
µA
V
IN
= V or GND
CC
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
Note: I and I
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
.
IN CC
CC
FACT DATA
5-5
MC74AC259 MC74ACT259
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
74AC
T
= –40°C
A
T
C
= +25°C
= 50 pF
V
(V)
*
Fig.
No.
A
L
CC
Symbol
Parameter
to +85°C
C
Unit
= 50 pF
L
Min
Typ
Max
Min
Max
Propagation Delay
to Q
3.3
5.0
2.0
2.0
9.0
6.5
14.5
10.0
1.5
1.5
17.0
11.5
t
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
ns
3-5
3-5
3-6
3-6
3-6
3-6
3-7
PLH
D
n
n
Propagation Delay
to Q
3.3
5.0
2.0
2.0
9.0
6.0
13.5
9.5
1.5
1.5
16.0
11.0
PHL
PLH
PHL
PLH
PHL
PHL
D
n
n
Propagation Delay
E to Q
3.3
5.0
2.0
2.0
10.5
7.0
15.0
10.5
1.5
1.5
17.5
12.5
n
Propagation Delay
E to Q
3.3
5.0
2.0
2.0
8.0
7.5
12.5
9.0
1.5
1.5
15.0
11.0
n
Propagation Delay
Address to Q
3.3
5.0
2.0
2.0
12.0
8.0
19.0
13.0
1.5
1.5
22.5
15.5
n
Propagation Delay
Address to Q
3.3
5.0
2.0
2.0
10.0
7.0
16.0
11.0
1.5
1.5
19.0
13.0
n
Propagation Delay
MR to Q
3.3
5.0
2.0
2.0
8.0
6.0
12.0
9.0
1.5
1.5
13.5
10.0
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
74AC
74AC
T
= –40°C
A
T
C
= +25°C
= 50 pF
V
CC
(V)
*
Fig.
No.
A
L
Symbol
Parameter
to +85°C
= 50 pF
Unit
C
L
Typ
Guaranteed Minimum
Setup Time, HIGH or LOW
to E
3.3
5.0
3.5
2.5
4.5
3.5
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
3-9
3-9
3-6
3-6
3-6
3-6
s
D
n
Hold Time, HIGH or LOW
to E
3.3
5.0
2.5
2.0
2.5
2.0
h
s
D
n
Setup Time
Address to E
3.3
5.0
7.0
4.0
9.0
6.0
Hold Time
Address to E
3.3
5.0
2.0
2.0
2.0
2.0
h
w
w
Minimum Pulse
Width MR
3.3
5.0
6.0
5.5
6.5
6.0
Minimum Pulse
Width E
3.3
5.0
6.5
5.5
7.0
6.0
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
FACT DATA
5-6
MC74AC259 MC74ACT259
DC CHARACTERISTICS
Symbol
74ACT
= +25°C
74ACT
T
A
=
V
(V)
CC
Parameter
Unit
Conditions
T
A
–40°C to +85°C
Typ
Guaranteed Limits
V
V
V
4.5
5.5
1.5
1.5
2.0
2.0
2.0
2.0
V
= 0.1 V
– 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
or V
CC
= 0.1 V
OUT
4.5
5.5
1.5
1.5
0.8
0.8
0.8
0.8
V
Maximum Low Level
Input Voltage
IL
or V
– 0.1 V
CC
4.5
5.5
4.49
5.49
4.4
5.4
4.4
5.4
I
= –50 µA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IN IL IH
4.5
5.5
3.86
4.86
3.76
4.76
V
V
–24 mA
–24 mA
I
OH
V
OL
4.5
5.5
0.001
0.001
0.1
0.1
0.1
0.1
I = 50 µA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN IL
IH
4.5
5.5
0.36
0.36
0.44
0.44
V
24 mA
I
OL
24 mA
I
IN
Maximum Input
Leakage Current
5.5
±0.1
±1.0
µA
V = V , GND
I
CC
∆I
Additional Max. I /Input
CC
5.5
5.5
5.5
0.6
1.5
75
mA
mA
mA
V = V
I
– 2.1 V
CCT
CC
I
V
= 1.65 V Max
= 3.85 V Min
OHD
†Minimum Dynamic
Output Current
OLD
OLD
I
–75
V
V
OHD
CC
I
Maximum Quiescent
Supply Current
5.5
8.0
80
µA
= V or GND
CC
IN
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
FACT DATA
5-7
MC74AC259 MC74ACT259
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74ACT
74ACT
= –40°C
T
A
T
C
= +25°C
= 50 pF
V
(V)
*
Fig.
No.
A
CC
Symbol
Parameter
to +85°C
Unit
L
C
= 50 pF
L
Min
Typ
Max
Min
Max
Propagation Delay
to Q
t
t
t
t
t
t
t
5.0
5.0
5.0
5.0
5.0
5.0
5.0
2.0
6.5
11.0
1.5
12.5
12.0
16.5
14.0
13.5
12.0
11.0
ns
ns
ns
ns
ns
ns
ns
3-5
3-5
3-6
3-6
3-6
3-6
3-7
PLH
D
n
n
Propagation Delay
or Q
2.0
2.0
2.0
2.0
2.0
2.0
7.0
10.5
9.0
10.5
14.0
12.0
11.5
10.0
10.0
1.5
1.5
1.5
1.5
1.5
1.5
PHL
PLH
PHL
PLH
PHL
PHL
D
n
n
Propagation Delay
E to Q
n
Propagation Delay
E or Q
n
Propagation Delay
Address to Q
8.0
n
Propagation Delay
Address to Q
6.0
n
Propagation Delay
MR to Q
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC OPERATING REQUIREMENTS
74ACT
74ACT
= –40°C
T
A
T
C
= +25°C
= 50 pF
V
CC
(V)
*
Fig.
No.
A
Symbol
Parameter
to +85°C
= 50 pF
Unit
L
C
L
Typ
Guaranteed Minimum
Setup Time, HIGH or LOW
to E
t
t
t
t
t
t
5.0
5.0
5.0
5.0
5.0
5.0
3.0
2.5
4.5
2.5
7.0
7.0
4.0
2.5
6.5
2.5
7.5
7.5
ns
ns
ns
ns
ns
ns
3-9
3-9
3-6
3-6
3-6
3-6
s
D
n
Hold Time, HIGH or LOW
to E
h
s
D
n
Setup Time
Address to E
Hold Time
Address to E
h
w
w
Minimum Pulse
Width MR
Minimum Pulse
Width E
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol
Value
Typ
Parameter
Unit
Test Conditions
C
C
Input Capacitance
Power Dissipation Capacitance
4.5
pF
pF
V
V
= 5.0 V
= 5.0 V
IN
CC
50.0
PD
CC
FACT DATA
5-8
MC74AC259 MC74ACT259
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
NOTES:
CASE 648–08
ISSUE R
–A–
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
16
1
9
8
B
S
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
INCHES
MILLIMETERS
DIM
A
B
C
D
F
MIN
MAX
0.770
0.270
0.175
0.021
0.70
MIN
18.80
6.35
3.69
0.39
1.02
MAX
19.55
6.85
4.44
0.53
1.77
F
0.740
0.250
0.145
0.015
0.040
C
L
SEATING
PLANE
–T–
G
H
J
K
L
0.100 BSC
0.050 BSC
2.54 BSC
1.27 BSC
K
M
0.008
0.015
0.130
0.305
10
0.21
0.38
3.30
7.74
10
H
J
0.110
0.295
0
2.80
7.50
0
G
D 16 PL
M
S
0.020
0.040
0.51
1.01
M
M
0.25 (0.010)
T
A
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
16
1
9
8
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
–B–
P 8 PL
M
S
0.25 (0.010)
B
G
MILLIMETERS
INCHES
DIM
A
B
C
D
MIN
9.80
3.80
1.35
0.35
0.40
MAX
10.00
4.00
1.75
0.49
1.25
MIN
MAX
0.393
0.157
0.068
0.019
0.049
F
0.386
0.150
0.054
0.014
0.016
R X 45
K
C
F
G
J
K
M
P
R
1.27 BSC
0.050 BSC
–T–
SEATING
PLANE
0.19
0.10
0
0.25
0.25
7
0.008
0.004
0
0.009
0.009
7
J
M
D
16 PL
5.80
0.25
6.20
0.50
0.229
0.010
0.244
0.019
M
S
S
0.25 (0.010)
T
B
A
Motorolareserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representationorguaranteeregarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of
the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
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against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
How to reach us:
USA/EUROPE: Motorola Literature Distribution;
JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447
6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315
MFAX: RMFAX0@email.sps.mot.com –TOUCHTONE (602) 244–6609
INTERNET: http://Design–NET.com
HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
MC74AC259/D
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相关型号：
MC74ACT259DR
ACT SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDSO16, PLASTIC, SOIC-16
MOTOROLA
MC74ACT259NG
ACT SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDIP16, LEAD FREE, PLASTIC, DIP-16
ROCHESTER
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