SN74ACT373N [TI]
OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS; 八路D型透明锁存器带3态输出
| 型号： | SN74ACT373N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS |
| 文件： | 总6页 (文件大小：86K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54ACT373, SN74ACT373
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SCAS544D – OCTOBER 1995 – REVISED JANUARY 2000
SN54ACT373 . . . J OR W PACKAGE
SN74ACT373 . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
Inputs Are TTL-Voltage Compatible
EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
Package Options Include Plastic
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
V
CC
Small-Outline (DW) Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK) and
Flatpacks (W), and Standard Plastic (N) and
Ceramic (J) DIPs
8Q
8D
7D
7Q
6Q
6D
5D
5Q
LE
description
These 8-bit latches feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. The devices
are particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
GND
SN54ACT373 . . . FK PACKAGE
(TOP VIEW)
The eight latches are D-type transparent latches.
When the latch-enable (LE) input is high, the Q
outputs follow the data (D) inputs. When LE is
taken low, the Q outputs are latched at the logic
levels set up at the D inputs.
3
2
1
20 19
18
8D
7D
7Q
6Q
6D
2D
2Q
3Q
3D
4D
4
5
6
7
8
17
16
15
14
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 the
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 in bus-organized systems without need for
interface or pullup components.
9 10 11 12 13
OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
The SN54ACT373 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74ACT373 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each latch)
INPUTS
OUTPUT
Q
OE
L
LE
H
H
L
D
H
L
H
L
L
L
X
X
Q
0
H
X
Z
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 2000, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ACT373, SN74ACT373
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SCAS544D – OCTOBER 1995 – REVISED JANUARY 2000
†
logic symbol
logic diagram (positive logic)
1
1
OE
LE
EN
C1
OE
11
11
LE
3
2
5
1D
2D
3D
4D
5D
6D
7D
8D
1D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
4
C1
2
1Q
7
6
3
1D
1D
8
9
13
14
17
18
12
15
16
19
To Seven Other Channels
†
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 V
+ 0.5 V
+ 0.5 V
I
CC
CC
Output voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
O
Input clamp current, I (V < 0 or V > V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
IK
I
I
CC)
O
Output clamp current, I
(V < 0 or V > V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
CC)
OK
O
Continuous output current, I (V = 0 to V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through V
Package thermal impedance, θ (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
O
O
CC
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mA
JA
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
‡
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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ACT373, SN74ACT373
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SCAS544D – OCTOBER 1995 – REVISED JANUARY 2000
recommended operating conditions (see Note 3)
SN54ACT373 SN74ACT373
UNIT
MIN
4.5
2
MAX
MIN
4.5
2
MAX
V
V
V
V
V
Supply voltage
5.5
5.5
V
V
CC
IH
IL
High-level input voltage
Low-level input voltage
Input voltage
0.8
0.8
V
0
0
V
V
0
0
V
V
V
I
CC
CC
Output voltage
V
O
CC
CC
I
I
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
–24
24
–24
24
8
mA
mA
ns/V
°C
OH
OL
∆t/∆v
0
8
0
T
–55
125
–40
85
A
NOTE 3: All unused inputs of the device must be held at V
or GND to ensure proper device operation. Refer to the TI application report
CC
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
A
= 25°C
TYP
SN54ACT373 SN74ACT373
PARAMETER
TEST CONDITIONS
V
UNIT
CC
MIN
4.4
MAX
MIN
4.4
MAX
MIN
4.4
MAX
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
4.49
I
I
= –50 µA
OH
5.4
5.49
5.4
5.4
3.86
4.86
3.7
3.76
4.76
V
OH
= –24 mA
V
OH
4.7
†
†
I
I
= –50 mA
= –75 mA
3.85
OH
3.85
OH
0.1
0.1
0.1
0.1
0.1
0.1
I
= 50 µA
OL
OL
0.36
0.36
0.44
0.44
1.65
0.44
0.44
V
OL
I
= 24 mA
V
†
†
I
I
= 50 mA
OL
= 75 mA
1.65
±2.5
±1
OL
I
I
I
V
= V or GND
CC
±0.25
±0.1
4
±5
±1
80
µA
µA
µA
OZ
O
V = V
or GND
or GND,
I
I
CC
CC
V = V
I = 0
O
40
CC
I
One input at 3.4 V,
Other inputs at GND or V
‡
∆I
CC
5.5 V
0.6
4.5
1.5
1.5
mA
pF
CC
C
V = V
or GND
CC
5 V
i
I
†
‡
Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or V
.
CC
timing requirements over recommended operating free-air temperature range, V
(unless otherwise noted) (see Figure 1)
= 5 V ± 0.5 V
CC
T
= 25°C
SN54ACT373 SN74ACT373
A
UNIT
MIN
7
MAX
MIN
8.5
8.5
1
MAX
MIN
8
MAX
t
w
t
su
t
h
Pulse duration, LE high
Setup time, data before LE↓
Hold time, data after LE↓
ns
ns
ns
7
8
0
1
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ACT373, SN74ACT373
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SCAS544D – OCTOBER 1995 – REVISED JANUARY 2000
switching characteristics over recommended operating free-air temperature range,
V
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
CC
T
A
= 25°C
TYP
8.5
8
SN54ACT373 SN74ACT373
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
ns
MIN
2.5
2
MAX
10
10
11
MIN
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
MAX
12.5
12.5
12.5
11.5
11.5
11
MIN
1.5
1.5
2
MAX
11.5
11.5
11.5
11.5
10.5
10.5
12.5
10
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
D
Q
Q
Q
Q
2.5
2
8.5
8
LE
ns
10
9.5
9
1.5
1.5
1.5
2.5
1
2
8
ns
OE
OE
2
7.5
9
2.5
1.5
11
14
ns
7.5
8.5
11
operating characteristics, V
= 5 V, T = 25°C
A
CC
PARAMETER
TEST CONDITIONS
= 50 pF, f = 1 MHz
TYP
UNIT
C
Power dissipation capacitance
C
40
pF
pd
L
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ACT373, SN74ACT373
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SCAS544D – OCTOBER 1995 – REVISED JANUARY 2000
PARAMETER MEASUREMENT INFORMATION
2 × V
CC
Open
TEST
S1
S1
500 Ω
t
t
/t
Open
PLH PHL
/t
From Output
Under Test
t
2 × V
CC
Open
PLZ PZL
/t
PHZ PZH
C
= 50 pF
L
500 Ω
(see Note A)
3 V
0 V
1.5 V
Timing Input
Data Input
LOAD CIRCUIT
t
h
t
su
3 V
0 V
1.5 V
1.5 V
t
w
3 V
VOLTAGE WAVEFORMS
1.5 V
1.5 V
Input
Output
Control
(low-level
enabling)
0 V
3 V
0 V
VOLTAGE WAVEFORMS
1.5 V
1.5 V
t
t
PZL
PLZ
Output
Waveform 1
≈V
3 V
CC
Input
50% V
1.5 V
1.5 V
CC
CC
S1 at 2 × V
(see Note B)
CC
V
V
+ 0.3 V
OL
V
OL
0 V
t
t
t
t
PZH
PHZ
PLH
PHL
Output
Waveform 2
S1 at Open
(see Note B)
V
OH
V
OH
Output
– 0.3 V
OH
50% V
50% V
50% V
CC
VOLTAGE WAVEFORMS
includes probe and jig capacitance.
CC
V
≈0 V
OL
VOLTAGE WAVEFORMS
NOTES: A.
C
L
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, Z = 50 Ω, t ≤ 2.5 ns, t ≤ 2.5 ns.
O
r
f
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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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.
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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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Copyright 2000, Texas Instruments Incorporated
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