74AS878FN [ROCHESTER]
Bus Driver;
| 型号： | 74AS878FN |
| 厂家： | 
Rochester Electronics |
| 描述： | Bus Driver |
| 文件： | 总9页 (文件大小：338K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
REI Datasheet
SN54ALS878A, SN54ALS879A, SN54AS878, SN54AS879
SN74ALS878A, SN74ALS879A, SN74AS878, SN74AS879
Dual 4-Bit D-Type Edge-Triggered Flip-Flops with 3-State Outputs
These dual 4-bit registers feature 3-state outputs designed specifically for bus driving. This makes
these devices particularly suitable for implementing buffer registers, I/O ports, bidirectional bus
drivers, and working registers.
The dual 4-bit edge-triggered flip-flops enter data on the low-to-high transition of the clock (1CLK and
2CLK). All types have individual synchronous clear inputs and output control pins for each group of
4-bit registers.
Quality Overview
Rochester Electronics
Manufactured Components
•
•
•
ISO-9001
AS9120 certification
Qualified Manufacturers List (QML) MIL-PRF-38535
Rochester branded components are
manufactured using either die/wafers
purchased from the original suppliers
or Rochester wafers recreated from the
original IP. All recreations are done with
the approval of the OCM.
•
•
Class Q Military
Class V Space Level
•
Qualified Suppliers List of Distributors (QSLD)
•
Rochester is a critical supplier to DLA and
meets all industry and DLA standards.
Parts are tested using original factory
test programs or Rochester developed
test solutions to guarantee product
meets or exceeds the OCM data sheet.
RochesterElectronics, LLCiscommittedtosupplying
products that satisfy customer expectations for
quality and are equal to those originally supplied by
industry manufacturers.
The original manufacturer’s datasheet accompanying this document reflects the performance
and specifications of the Rochester manufactured version of this device. Rochester Electronics
guarantees the performance of its semiconductor products to the original OEM specifications.
‘Typical’ values are for reference purposes only. Certain minimum or maximum ratings may be
based on product characterization, design, simulation, or sample testing.
© 2013 Rochester Electronics, LLC. All Rights Reserved 12232013
To learn more, please visit www.rocelec.com
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SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986
• 3-State Bus Driving Outputs
SN54ALS878A, SN54AS878 . . . JT PACKAGE
SN74ALS878A, SN74AS878 . . . DW OR NT PACKAGE
(TOP VIEW)
• Full Parallel-Access for Loading
• Buffered Control Inputs
1CLR
1OC
1D1
1D2
1D3
1D4
2D1
2D2
2D3
2D4
2OC
GND
V
CC
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
1CLK
1Q1
1Q2
1Q3
1Q4
2Q1
• Choice of True or Inverting Logic
’ALS878A, ’AS878 True Outputs
’ALS879A, ’AS879 Inverting Outputs
• Synchronous Clear
17 2Q2
• Package Options Include Plastic Small
Outline Packages, Both Plastic and
Ceramic Chip Carriers, and Standard
Plastic and Ceramic 300-mil DIPs
16
2Q3
2Q4
2CLK
2CLR
10 15
11 14
12 13
SN54ALS878A, SN54AS878 . . . FK PACKAGE
SN74ALS878A, SN74AS878 . . . FN PACKAGE
(TOP VIEW)
• Dependable Texas Instruments Quality and
Reliability
description
These dual 4-bit registers feature 3-state outputs
designed specifically for bus driving. This makes
these devices particularly suitable for implement-
ing buffer registers, I/O ports, bidirectional bus
drivers, and working registers.
4
3 2 1 28 27 26
1D2
1D3
1D4
NC
2D1
2D2
2D3
5
6
7
8
25
24
1Q2
1Q3
23 1Q4
22 NC
9
2Q1
Q22
2Q3
21
20
19
10
11
12
1314
16 1718
The dual 4-bit edge-triggered flip-flops enter data
on the low-to-high transition of the clock (1CLK
and 2CLK). All types have individual synchronous
clear inputs and output control pins for each group
of 4-bit registers.
15
SN54ALS879A, SN54AS879 . . . JT PACKAGE
SN74ALS879A, SN74AS879 . . . DW OR NT PACKAGE
(TOP VIEW)
The SN54ALS’ and SN54AS’ devices are
characterized for operation over the full military
temperature range of −55°C to 125°C. The
SN74ALS’ and SN74AS’ devices are character-
ized for operation from 0°C to 70°C.
V
1CLR
1OC
1D1
1D2
1D3
1D4
2D1
2D2
2D3
2D4
2OC
CC
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
1CLK
1Q1
1Q2
1Q3
1Q4
2Q1
2Q2
2Q3
2Q4
2CLK
2CLR
10 15
11 14
GND 12 13
SN54ALS879A, SN54AS879 . . . FK PACKAGE
SN74ALS879A, SN74AS879 . . . FN PACKAGE
(TOP VIEW)
4
3 2 1 28 27 26
25
1D2
1D3
1D4
NC
2D1
2D2
2D3
5
6
7
8
9
1Q2
1Q3
24
23 1Q4
22 NC
2Q1
2Q2
2Q3
21
20
19
10
11
121314
161718
15
NC − No internal connection
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Copyright 1986, Texas Instruments Incorporated
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
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SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986
FUNCTION TABLES
’ALS878A, ’AS878
(each flip-flop)
’ALS879A, ’AS879
(each flip-flop)
INPUTS
INPUTS
OC CLR CLK
OUTPUT
Q
OUTPUT
Q
OC CLR CLK
D
D
L
L
L
L
H
L
↑
↑
↑
L
X
X
H
L
X
X
L
H
L
L
L
L
L
H
L
↑
↑
↑
L
X
X
H
L
X
X
H
L
H
H
H
H
X
H
H
H
X
Q
Q
Z
0
0
Z
†
logic symbols
’ALS878A, ’AS878
EN
’ALS879A, ’AS879
EN
2
2
1OC
1OC
23
1CLK
1
23
1
C1
1R
1CLK
1CLR
C1
1R
1CLR
3
1D1
4
22
21
20
3
4
5
22
21
20
1D
1Q1
1Q2
1Q3
1D1
1D2
1D3
1D
1Q1
1Q2
1Q3
1D2
5
1D3
6
19
6
19
1D4
1Q4
1D4
1Q4
11
11
2OC
EN
2OC
EN
14
2CLK
13
14
13
C1
1R
2CLK
2CLR
C1
1R
2CLR
7
2D1
8
18
17
16
7
8
9
18
17
16
1D
2Q1
2Q2
2Q3
2D1
2D2
2D3
1D
2Q1
2Q2
2Q3
2D2
9
2D3
10
15
10
15
2D4
2Q4
2D4
2Q4
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for DW, JT, and NT packages.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
ꢀꢁ ꢂꢃ ꢄꢅ ꢀ ꢆꢇ ꢆ ꢄꢈ ꢉꢀ ꢁꢂ ꢃ ꢄꢅ ꢀ ꢆꢇ ꢊꢄ
ꢀꢁ ꢇꢃ ꢄꢅ ꢀ ꢆꢇ ꢆ ꢄꢈ ꢉꢀ ꢁꢇ ꢃ ꢄꢅ ꢀ ꢆꢇ ꢊꢄ
ꢋꢌ ꢄꢅꢉ ꢃ ꢍꢎꢏ ꢐ ꢉ ꢋꢍꢐꢑ ꢒ ꢓꢉ ꢓꢋꢔ ꢓꢍ ꢐ ꢕꢏꢔ ꢔ ꢓꢕꢓꢋ ꢉꢖ ꢅ ꢏꢒꢍ ꢖ ꢅꢗ ꢒ ꢀ ꢉꢘ ꢏ ꢐꢙꢉ ꢚꢍ ꢀꢐꢄꢐ ꢓꢉꢗ ꢌ ꢐꢒ ꢌꢐ ꢀ
ꢛ
SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986
logic diagrams (positive logic)
’ALS878A, ’AS878
(each quad flip-flop)
’ALS879A, ’AS879
(each quad flip-flop)
OC
OC
CLK
CLR
CLK
CLR
Q1
Q2
Q3
Q1
C1
C1
1D
1D
D1
D1
D2
D3
Q2
C1
C1
1D
1D
D2
Q3
C1
C1
1D
1D
D3
Q4
Q4
C1
C1
1D
1D
D4
D4
Pin numbers shown are for DW, JT, and NT packages.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
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SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range: SN54ALS878A, SN54ALS879A . . . . . . . . . . . . . . . . −55°C to 125°C
SN74ALS878A, SN74ALS879A . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
recommended operating conditions
SN54ALS878A
SN54ALS879A
SN74ALS878A
SN74ALS879A
UNIT
MIN NOM
MAX
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
IH
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
0.7
−1
12
25
20
0.8
−2.6
24
V
IL
I
I
mA
mA
OH
OL
’ALS878A
0
0
0
0
30
f
Clock frequency
MHz
ns
clock
w
’ALS879A
25
’ALS878A CLK high or low
20
25
15
20
4
16.5
20
15
20
4
t
Pulse duration
’ALS879A CLK high or low
Data
CLR
Data
CLR
Setup time before CLK↑
Hold time after CLK↑
ns
tsu
t
h
ns
0
0
T
A
Operating free-air temperature
−55
125
0
70°
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54ALS878A
SN74ALS878A
PARAMETER
TEST CONDITIONS
SN54ALS879A
SN74ALS879A
UNIT
V
†
†
MIN TYP
MAX
MIN TYP
MAX
V
IK
V
V
V
V
V
V
V
V
V
V
V
V
= 4.5 V,
= 4.5 V to 5.5 V,
= 4.5 V,
= 4.5 V,
= 4.5 V,
= 4.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
I = −18 mA
−1.2
−1.2
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
I
I
I
I
I
I
= −0.4 mA
= −1 mA
= −2.6 mA
= 12 mA
= 24 mA
= 2. 7 V
V
−2
V
−2
OH
OH
OH
OL
OL
CC
CC
V
OH
2.4
3.3
V
2.4
3.2
0.25
0.35
0.25
0.4
0.4
0.5
20
V
OL
V
I
V
20
−20
0.1
µA
µA
OZH
O
O
I
V
= 0.4 V
−20
0.1
20
OZL
I
I
V = 7 V
I
mA
µA
I
I
I
V
O
= 2.7 V
20
IH
V = 0 .4 V
I
−0.2
−112
23
−0.2
−112
23
mA
mA
IL
‡
V
O
= 2.25 V
−30
−30
O
Outputs high
Outputs low
14
18
20
14
18
20
I
V
CC
= 5.5 V
31
31
mA
CC
Outputs disabled
33
33
†
‡
All typical values are at V
CC
= 5 V, T = 25°C.
A
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
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ꢀꢁ ꢇꢃ ꢄꢅ ꢀ ꢆꢇ ꢆ ꢄꢈ ꢉꢀ ꢁꢇ ꢃ ꢄꢅ ꢀ ꢆꢇ ꢊꢄ
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ꢓꢉ
ꢓ
ꢋ
ꢔ
ꢓ
ꢍ
ꢐ
ꢕ
ꢏ
ꢔ
ꢔ
ꢓ
ꢕ
ꢓ
ꢋ
ꢉ
ꢖ
ꢅ
ꢏ
ꢒ
ꢍ
ꢖ
ꢅ
ꢗ
ꢒ
ꢀ
ꢉ
ꢘ
ꢏ
ꢐ
ꢙ
ꢉ
ꢚꢍ
ꢀ
ꢐ
ꢄ
ꢐ
ꢓ
ꢉ
ꢗ
ꢌ
ꢐ
ꢒ
ꢌ
ꢐ
ꢀ
SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986
switching characteristics (see Note 1)
V
= 5 V,
V
= 4.5 V to 5.5 V,
CC
CC
C = 50 pF,
L
C
= 50 pF,
L
R1 = 500 Ω,
R2 = 500 Ω,
R1 = 500 Ω,
R2 = 500 Ω,
FROM
TO
PARAMETER
UNIT
(INPUT)
(OUTPUT)
T
= 25°C
T = MIN to MAX
A
A
’ALS878A
’ALS879A
SN54ALS878A SN74ALS878A
SN54ALS879A SN74ALS879A
MIN
40
TYP
50
50
8
MAX
MIN
25
MAX
MIN
30
25
4
MAX
’ALS878A
’ALS879A
f
MHz
ns
max
40
20
4
t
t
t
t
t
t
10
13
13
15
8
15
17
22
22
12
18
14
16
20
20
10
15
PLH
PHL
PZH
PZL
PHZ
PLZ
CLK
OC
OC
Q or Q
Q or Q
Q or Q
9
4
4
9
4
4
ns
11
6
4
4
2
2
ns
7
10
3
3
NOTE 1: Load circuit and voltage waveforms are shown in Section 1.
5
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
ꢀ
ꢁ
ꢂ
ꢃꢄ
ꢀ
ꢆ
ꢇ
ꢆ
ꢈ
ꢉ
ꢀ
ꢁ
ꢂ
ꢃꢄ
ꢀꢆ
ꢇ
ꢊ
ꢛ
ꢀ
ꢁ
ꢇ
ꢃꢄ
ꢀ
ꢆ
ꢇꢆ
ꢈ
ꢉ
ꢀ
ꢁ
ꢇ
ꢃ
ꢄ
ꢀꢆ
ꢇ
ꢊ
ꢋ
ꢌ
ꢄ
ꢅ
ꢉ
ꢃ
ꢍ
ꢎꢏ
ꢐ
ꢉ
ꢋ
ꢍ
ꢐ
ꢑ
ꢒ
ꢓꢉ
ꢓ
ꢋ
ꢔ
ꢓ
ꢍ
ꢐ
ꢕ
ꢏꢔꢔ
ꢓ
ꢕ
ꢓ
ꢋ
ꢉ
ꢖ
ꢅ
ꢏ
ꢒ
ꢍ
ꢖ
ꢅꢗ
ꢒ
ꢀ
ꢉ
ꢘ
ꢏ
ꢐꢙ
ꢉ
ꢚꢍ
ꢀ
ꢐ
ꢄ
ꢐ
ꢓ
ꢉ
ꢗꢌ
ꢐꢒ
ꢌ
ꢐꢀ
SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range: SN54AS878, SN54AS879 . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74AS878, SN74AS879 . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
recommended operating conditions
SN54AS878
SN54AS879
SN74AS878
SN74AS879
UNIT
MIN NOM
MAX
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
IH
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Clock Frequency
0.8
−12
32
0.8
−15
48
V
IL
I
I
f
mA
mA
MHz
OH
OL
clock
0
4
100
0
2
125
CLK low
CLK high
Data
t
w
Pulse duration
ns
ns
5
4
3
2
Setup time before CLK↑
Hold time after CLK↑
tsu
CLR
6.5
3
5.5
2
Data
t
h
ns
CLR
0
0
T
A
Operating free-air temperature
−55
125
0
70°
°C
6
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
ꢀ
ꢀ
ꢁ
ꢂ
ꢃ
ꢄ
ꢀ
ꢆ
ꢇ
ꢆ
ꢈ
ꢉ
ꢀ
ꢁ
ꢂ
ꢃ
ꢁꢇ ꢃ ꢄꢀ ꢆ ꢇ ꢆꢈ ꢉꢀ ꢁꢇ ꢃꢄ ꢀ ꢆꢇ
ꢄ
ꢀ
ꢆ
ꢇ
ꢊ
ꢊ
ꢛ
ꢋ
ꢌ
ꢄ
ꢅꢉ
ꢃ
ꢍ
ꢎ
ꢏ
ꢐ
ꢉ
ꢋ
ꢍ
ꢐ
ꢑ
ꢒ
ꢓꢉ
ꢓ
ꢋ
ꢔ
ꢓ
ꢍ
ꢐ
ꢕ
ꢏ
ꢔ
ꢔ
ꢓ
ꢕ
ꢓ
ꢋ
ꢉ
ꢖ
ꢅ
ꢏ
ꢒ
ꢍ
ꢖ
ꢅ
ꢗ
ꢒ
ꢀ
ꢉ
ꢘ
ꢏ
ꢐ
ꢙ
ꢉ
ꢚ
ꢍ
ꢀ
ꢐ
ꢄ
ꢐ
ꢓ
ꢉ
ꢗ
ꢌ
ꢐ
ꢒ
ꢌ
ꢐ
ꢀ
SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54AS878
SN74AS878
PARAMETER
TEST CONDITIONS
SN54AS879
SN74AS879
UNIT
V
‡
‡
MIN TYP
MAX
MIN TYP
MAX
V
V
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 4.5 V,
I = −18 mA
I
−1.2
−1.2
IK
= 4.5 V to 5.5 V,
= 4.5 V,
I
I
I
I
I
= −2 mA
= −12 mA
= −15 mA
= 32 mA
= 48 mA
= 2.7 V
V
CC
−2
V
CC
−2
OH
OH
OH
OL
OL
2.4
3.2
V
OH
= 4.5 V,
2.4
3.3
= 4.5 V,
0.29
0.5
V
V
OL
= 4.5 V,
0.33
0.5
50
I
I
I
I
= 5.5 V,
V
50
−50
0.1
µA
µA
mA
µA
OZH
OZL
I
O
O
= 5.5 V,
V
= 0.4 V
−50
0.1
= 5.5 V,
V = 7 V
I
V = 2.7 V
I
= 5.5 V,
20
20
IH
D
−3
−2
I
V
= 5.5 V,
= 5.5 V,
V = 0.4 V
mA
mA
IL
CC
CC
I
All other
−0.5
−112
132
155
160
142
150
160
−0.5
−112
132
155
160
142
150
160
‡
I
O
V
V
O
= 2.25 V
−30
−30
Outputs high
Outputs low
82
96
82
96
’AS878
’AS879
V
CC
= 5.5 V,
Outputs disabled
Outputs high
Outputs low
100
88
100
88
I
mA
CC
See Note 2
94
94
Outputs disabled
100
100
†
‡
All typical values are at V
CC
= 5 V, T = 25°C.
A
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
NOTE 2: I
CC
is measured with CLR and all D inputs grounded, and CLK and OC at 4.5 V.
switching characteristics (see Note 1)
V
= 4.5 V to 5.5 V,
CC
= 50 pF,
C
L
R1 = 500 Ω,
R2 = 500 Ω,
FROM
TO
(OUTPUT)
PARAMETER
(INPUT)
T
= MIN to MAX
A
UNIT
SN54AS878
SN54AS879
SN74AS878
SN74AS879
MIN
100
MAX
MIN
125
3
MAX
t
t
t
t
t
t
t
MHz
ns
max
PLH
PHL
PZH
PZL
PHZ
PLZ
3
4
2
3
2
2
11.5
12.5
8
8.5
10.5
7
CLK
OC
OC
Q or Q
Q or Q
Q or Q
4
2
ns
ns
11.5
7
3
10.5
6
2
7
2
6
NOTE 1: Load circuit and voltage waveforms are shown in Section 1.
7
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