SN74BCT574 [TI]
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS; 八路边沿触发D型触发器具有三态输出
| 型号： | SN74BCT574 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS |
| 文件： | 总5页 (文件大小：76K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54BCT574, SN74BCT574
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS074B – SEPTEMBER 1991 – REVISED NOVEMBER 1993
SN54BCT574 . . . J OR W PACKAGE
SN74BCT574 . . . DW OR N PACKAGE
(TOP VIEW)
• State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
• ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1D
2D
3D
4D
5D
6D
7D
8D
V
CC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
• Full Parallel Access for Loading
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
description
GND
These 8-bit flip-flops feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. They are
particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
SN54BCT574 . . . FK PACKAGE
(TOP VIEW)
3
2
1
20 19
18
4
5
6
7
8
3D
4D
5D
6D
7D
2Q
3Q
4Q
5Q
6Q
The eight flip-flops of the ′BCT574 are
edge-triggered D-type flip-flops. On the positive
transition of the clock (CLK) input, the Q outputs
will be set to the logic levels that were set up at the
data (D) inputs.
17
16
15
14
9 10 11 12 13
A buffered output-enable (OE) input can be used
to place the eight outputs in either a normal logic
state (high or low logic levels) or a high-
impedance state. In the high-impedance state, the
outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide
the capability to drive bus lines without need for interface or pullup components.
The output enable (OE) does not affect the internal operations of the flip-flops. Old data can be retained or new
data can be entered while the outputs are in the high-impedance state.
The SN54BCT574 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74BCT574 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUT
Q
OE
L
CLK
D
H
L
↑
↑
H
L
L
L
H or L
X
X
X
Q
0
H
Z
Copyright 1993, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT574, SN74BCT574
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS074B – SEPTEMBER 1991 – REVISED NOVEMBER 1993
†
logic symbol
logic diagram (positive logic)
1
OE
1
EN
C1
OE
11
CLK
11
CLK
2
1D
3
19
18
17
16
15
14
13
12
1D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
C1
1D
2D
4
19
1Q
2
1D
3D
5
4D
6
5D
7
6D
8
7D
9
To Seven Other Channels
8D
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
‡
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
I
Voltage range applied to any output in the disabled or power-off state, V . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
O
Voltage range applied to any output in the high state, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to V
O
CC
Input clamp current, I (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA
IK
I
Current into any output in the low state, I : SN54BCT574 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
O
SN74BCT574 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range:
SN54BCT574 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74BCT574 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
recommended operating conditions
SN54BCT574
MIN NOM MAX
SN74BCT574
MIN NOM MAX
UNIT
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
IH
IL
High-level input voltage
Low-level input voltage
Input clamp current
0.8
–18
–12
48
0.8
–18
–15
64
V
I
I
I
mA
mA
mA
°C
IK
High-level output current
Low-level output current
Operating free-air temperature
OH
OL
T
A
–55
125
0
70
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT574, SN74BCT574
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS074B – SEPTEMBER 1991 – REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54BCT574
SN74BCT574
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
V
V
V
= 4.5 V,
= 4.5 V
I = –18 mA
–1.2
–1.2
V
IK
CC
I
I
I
I
I
I
= –3 mA
= –12 mA
= –15 mA
= 48 mA
= 64 mA
2.4
2
3.3
3.2
2.4
2
3.3
3.1
OH
OH
OH
OL
OL
V
OH
V
CC
0.38
0.55
V
OL
V
CC
= 4.5 V
V
0.42
0.55
0.4
20
I
I
I
I
I
I
I
I
I
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5 V,
V = 5.5 V
I
0.4
20
mA
µA
I
V = 2.7 V
I
IH
IL
V = 0.5 V
I
–0.6
–225
50
–0.6
–225
50
mA
mA
µA
‡
V
O
V
O
V
O
= 0
–100
–100
OS
= 2.7 V
= 0.5 V
OZH
OZL
CCL
CCH
CCZ
–50
62
–50
62
µA
Outputs open
Outputs open
Outputs open
38.1
4.9
38.1
4.9
4.9
5.5
8
mA
mA
mA
pF
8
8
4.5
8
8
C
C
V = 2.5 V or 0.5 V
I
i
= 5 V,
V
O
= 2.5 V or 0.5 V
pF
o
†
‡
All typical values are at V
= 5 V, T = 25°C.
A
CC
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
V
T
= 5 V,
= 25°C
CC
A
SN54BCT574 SN74BCT574
UNIT
MIN
0
MAX
MIN
0
MAX
MIN
0
MAX
f
t
Clock frequency
77
77
77
MHz
ns
clock
Pulse duration, CLK high or low
6.5
4.5
6
6.5
4.5
6
6.5
4.5
6
w
High
t
ns
ns
Setup time, data before CLK↑
Hold time, data after CLK↑
su
h
Low
t
High or low
0
1
0
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C = 50 pF (unless otherwise noted) (see Note 2)
L
V
T
= 5 V,
= 25°C
CC
A
SN54BCT574 SN74BCT574
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
MIN
77
TYP
MAX
MIN
77
MAX
MIN
77
MAX
f
t
t
t
t
t
t
MHz
ns
max
PLH
PHL
PZH
PZL
PHZ
PLZ
2.2
2.8
2.5
3.7
1
6.5
6.1
6.4
7.3
4.4
4.2
8.6
8
2.2
2.8
2.5
3.7
1
11.2
9.7
10.9
11.3
8
2.2
2.8
2.5
3.7
1
10
8.9
CLK
Q
Q
Q
8.1
9.2
7.4
5.8
10.4
10.9
7.5
ns
ns
OE
OE
1.3
1.3
7.1
1.3
6.4
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–4
IMPORTANT NOTICE
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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pertaining to warranty, patent infringement, and limitation of liability.
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
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safeguards must be provided by the customer to minimize inherent or procedural hazards.
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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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