SN74ALS620A-1N [TI]
ALS SERIES, 8-BIT TRANSCEIVER, INVERTED OUTPUT, PDIP20, 0.300 INCH, PLASTIC, DIP-20;
| 型号： | SN74ALS620A-1N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | ALS SERIES, 8-BIT TRANSCEIVER, INVERTED OUTPUT, PDIP20, 0.300 INCH, PLASTIC, DIP-20 光电二极管 输出元件 逻辑集成电路 |
| 文件： | 总16页 (文件大小：276K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
DW OR N PACKAGE
(TOP VIEW)
• Local Bus-Latch Capability
• Choice of True or Inverting Logic
• Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic (N) 300-mil DIPs
OEAB
A1
V
CC
OEBA
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
A2
A3
A4
A5
A6
A7
A8
GND
B1
B2
B3
B4
DEVICE
SN74ALS620A
OUTPUT
3 state
LOGIC
Inverting
True
B5
SN74ALS621A
Open collector
3 state
13 B6
12 B7
SN74ALS623A, SN74AS623
True
11
B8
description
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The
control-function implementation allows for maximum flexibility in timing.
These devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending
upon the logic levels at the output-enable (OEAB and OEBA) inputs.
The output-enable inputs disable the device so that the buses are effectively isolated. The dual-enable
configuration gives the transceivers the capability to store data by simultaneously enabling OEAB and OEBA.
Each output reinforces its input in this transceiver configuration. When both OEAB and OEBA are enabled and
all other data sources to the two sets of bus lines are in the high-impedance state, both sets of bus lines (16 total)
remain at their last states. The 8-bit codes appearing on the two sets of buses are identical for the
SN74ALS621A, SN74ALS623A, and SN74AS623 or complementary for the SN74ALS620A.
The -1 versions of the SN74ALS620A and SN74ALS621A are identical to the standard versions, except that
the recommended maximum I is increased to 48 mA in the -1 versions.
OL
The SN74ALS620A, SN74ALS621A, SN74ALS623A, and SN74AS623 are characterized for operation from
0°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
SN74ALS621A
OEAB
SN74ALS620A
SN74ALS623A
SN74AS623
OEBA
L
H
H
L
H
L
B data to A bus
A data to B bus
Isolation
B data to A bus
A data to B bus
Isolation
B data to A bus,
A data to B bus
B data to A bus,
A data to B bus
L
H
Copyright 1995, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
†
logic symbols
SN74ALS620A
19
EN1
OEBA
OEAB
1
EN2
2
18
17
16
15
14
13
12
11
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
1
2
3
4
5
6
7
8
9
SN74ALS623A, SN74AS623
SN74ALS621A
19
1
19
1
EN1
EN2
EN1
EN2
OEBA
OEAB
OEBA
OEAB
2
18
17
2
18
A1
B1
A1
B1
1
1
2
2
17
16
15
3
4
3
4
B2
B3
B4
B2
A2
A3
A2
A3
16
15
B3
B4
5
6
5
6
A4
A5
A4
A5
14
13
12
14
13
12
B5
B6
B7
B5
B6
B7
7
7
8
9
A6
A6
A7
A8
8
9
A7
A8
11
11
B8
B8
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
logic diagrams (positive logic)
SN74ALS620A
SN74ALS621A
19
19
OEBA
OEBA
1
1
OEAB
OEAB
18
B1
18
2
2
A1
A1
B1
To Seven Other Transceivers
To Seven Other Transceivers
SN74ALS623A, SN74AS623
19
1
OEBA
OEAB
2
18
A1
B1
To Seven Other Transceivers
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V : All inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
I
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range, T : SN74ALS620A, SN74ALS623A . . . . . . . . . . . . . . . . . 0°C to 70°C
A
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.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
recommended operating conditions
SN74ALS620A
SN74ALS623A
UNIT
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
IH
0.8
–15
24
V
IL
I
I
mA
mA
°C
OH
OL
T
A
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74ALS620A
SN74ALS623A
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
V
V
V
V
= 4.5 V,
I = –18 mA
–1.2
V
IK
CC
I
= 4.5 V to 5.5 V,
I
I
I
I
I
= –0.4 mA
= –3 mA
= –15 mA
= 12 mA
V
–2
CC
OH
OH
OH
OL
OL
CC
2.4
3.2
V
OH
V
CC
V
CC
V
CC
V
CC
= 4.5 V
2
0.25
0.35
0.4
0.5
0.1
0.1
20
V
OL
= 4.5 V
= 5.5 V
= 5.5 V,
V
‡
= 24 mA
Control inputs
A or B ports
V = 7 V
I
I
I
mA
µA
I
V = 5.5 V
I
Control inputs
V = 2.7 V
I
IH
IL
§
A or B ports
20
Control inputs
–0.1
–0.1
–112
34
I
I
V
V
= 5.5 V,
= 5.5 V,
V = 0.4 V
I
mA
mA
CC
§
A or B ports
¶
V
O
= 2.25 V
–30
O
CC
Outputs high
Outputs low
24
31
33
32
39
42
SN74ALS620A
SN74ALS623A
V
= 5.5 V
= 5.5 V
44
CC
CC
Outputs disabled
Outputs high
Outputs low
47
I
mA
CC
43
V
50
Outputs disabled
55
†
All typical values are at V
= 5 V, T = 25°C.
A
CC
Applies only to the -1 version and only if V
‡
§
¶
is between 4.75 V and 5.25 V
CC
For I/O ports, the parameters I and I include the off-state output current.
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
IH IL
.
OS
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
switching characteristics (see Figure 1)
V
C
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
R1 = 500 Ω,
R2 = 500 Ω,
T
A
FROM
TO
(OUTPUT)
PARAMETER
(INPUT)
UNIT
†
= MIN to MAX
SN74ALS620A SN74ALS623A
MIN
2
MAX
10
10
10
10
17
25
12
18
18
25
12
18
MIN
2
MAX
13
11
t
t
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
PZH
PZL
PHZ
PLZ
A
B
ns
ns
ns
ns
ns
ns
B
A
A
A
B
B
2
3
2
2
13
11
2
3
3
5
22
22
16
19
22
22
16
19
OEBA
OEBA
OEAB
OEAB
5
5
2
2
3
2
3
5
5
5
2
2
3
2
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V : All inputs and I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
I
Operating free-air temperature range, T : SN74ALS621A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
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.
recommended operating conditions
SN74ALS621A
MIN NOM MAX
UNIT
V
V
V
V
Supply voltage
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output voltage
IH
0.8
5.5
24
V
IL
V
OH
mA
mA
°C
I
Low-level output current
OL
§
48
70
T
A
Operating free-air temperature
0
§
Applies only to the -1 version and only if V
CC
is between 4.75 V and 5.25 V
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74ALS621A
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
–1.5
0.1
0.5
0.5
0.1
0.1
20
V
IK
V
V
= 4.5 V,
I = –18 mA
I
V
CC
I
= 4.5 V,
V
OH
= 5.5 V
mA
OH
CC
I
I
= 24 mA
= 48 mA
0.35
0.35
OL
V
OL
V
CC
V
CC
V
CC
V
CC
V
CC
= 4.5 V
V
‡
OL
Control inputs
A or B ports
V = 7 V
I
I
I
I
I
= 5.5 V
= 5.5 V,
= 5.5 V,
= 5.5 V
mA
µA
I
V = 5.5 V
I
Control inputs
V = 2.7 V
I
IH
IL
§
A or B ports
Control inputs
20
–0.1
–0.1
40
V = 0.4 V
I
mA
mA
§
A or B ports
Outputs high
Outputs low
29
35
CC
48
†
‡
§
All typical values are at V
= 5 V, T = 25°C.
A
CC
Applies only to the -1 version and only if V
is between 4.75 V and 5.25 V
CC
For I/O ports, the parameters I and I include the off-state output current.
IH IL
switching characteristics (see Figure 1)
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
L
= 680 Ω,
FROM
TO
(OUTPUT)
¶
PARAMETER
(INPUT)
UNIT
T
A
= MIN to MAX
SN74ALS621A
MIN
10
5
MAX
33
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
A
B
ns
ns
ns
ns
B
A
A
B
20
10
5
33
20
10
12
10
12
39
OEBA
OEAB
35
39
35
¶
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V : All inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
I
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range, T : SN74AS623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
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.
recommended operating conditions
SN74AS623
MIN NOM
UNIT
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
IH
0.8
–15
64
V
IL
I
I
mA
mA
°C
OH
OL
T
A
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74AS623
PARAMETER
TEST CONDITIONS
UNIT
‡
MIN TYP
MAX
V
V
V
V
V
= 4.5 V,
I = –18 mA
–1.2
V
IK
CC
I
= 4.5 V to 5.5 V,
I
I
I
I
= –2 mA
= –3 mA
= –15 mA
= 64 mA
V
–2
CC
OH
OH
OH
OL
CC
2.4
3.2
V
OH
OL
V
CC
V
CC
V
CC
= 4.5 V
2
= 4.5 V,
0.35
0.55
0.1
V
Control inputs
A or B ports
V = 7 V
I
I
I
= 5.5 V
mA
V = 5.5 V
I
0.1
Control inputs
20
I
V
= 5.5 V,
V = 2.7 V
µA
IH
IL
CC
I
§
A or B ports
70
Control inputs
–0.5
–0.75
–150
93
I
I
V
V
= 5.5 V,
= 5.5 V,
V = 0.4 V
I
mA
mA
CC
§
A or B ports
¶
V
O
= 2.25 V
–30
O
CC
Outputs high
Outputs low
57
16
71
I
V
CC
= 5.5 V
189
116
mA
CC
Outputs disabled
‡
§
¶
All typical values are at V
= 5 V, T = 25°C.
A
CC
For I/O ports, the parameters I and I include the off-state output current.
IH
IL
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
switching characteristics (see Figure 1)
V
C
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
R1 = 500 Ω,
R2 = 500 Ω,
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
†
T
= MIN to MAX
A
SN74AS623
MIN
1
MAX
t
t
t
t
t
t
t
t
t
t
t
t
9
8
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
PZH
PZL
PHZ
PLZ
A
B
ns
ns
ns
ns
ns
ns
B
A
A
A
B
B
1
1
9
1
8.5
11
2
OEBA
OEBA
OEAB
OEAB
2
10
7.5
11.5
11.5
11
1
1
2
2
1
7
1
9
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
7 V
R
= R1 = R2
V
CC
L
S1
R1
R
L
Test
Point
From Output
Under Test
From Output
Under Test
Test
Point
Test
Point
From Output
Under Test
C
C
L
R
L
R2
L
C
L
(see Note A)
(see Note A)
(see Note A)
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
3.5 V
3.5 V
Timing
Input
High-Level
1.3 V
1.3 V
1.3 V
Pulse
0.3 V
0.3 V
t
h
t
w
t
su
3.5 V
3.5 V
0.3 V
Data
Input
Low-Level
1.3 V
1.3 V
1.3 V
1.3 V
Pulse
0.3 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PULSE DURATIONS
3.5 V
0.3 V
Output
Control
(low-level
enabling)
1.3 V
1.3 V
3.5 V
t
PZL
Input
1.3 V
1.3 V
t
PLZ
0.3 V
PHL
3.5 V
t
Waveform 1
S1 Closed
(see Note B)
t
PLH
1.3 V
V
OH
In-Phase
Output
1.3 V
1.3 V
1.3 V
V
OL
0.3 V
V
OL
t
PHZ
t
PLH
t
PZH
t
PHL
V
OH
V
Waveform 2
S1 Open
(see Note B)
OH
OL
Out-of-Phase
Output
(see Note C)
1.3 V
1.3 V
0.3 V
V
0 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A.
C includes probe and jig capacitance.
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. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, t = t = 2 ns, duty cycle = 50%.
r
f
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
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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In order to minimize risks associated with the customer’s applications, adequate design and operating
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FEATURES | DESCRIPTION | DATASHEETS | PRICING/AVAILABILITY/PKG |
APPLICATION NOTES | RELATED DOCUMENTS
PRODUCT FOLDER | PRODUCT INFO:
PRODUCT SUPPORT: TRAINING
SN74ALS621A-1, OCTAL BUS TRANSCEIVER/IOL=48mA O.C.
DEVICE STATUS: ACTIVE
PARAMETER NAME SN74ALS621A-1
Voltage Nodes (V)
Vcc range (V)
Input Level
5
4.75 to 5.25
TTL
Output Level
TTL
Output Drive (mA) - /48
No. of Outputs
Logic
8
True
44
33
Static Current
tpd max (ns)
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FEATURES
●
●
●
Local Bus-Latch Capability
Choice of True or Inverting Logic
Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs
Back to Top
DESCRIPTION
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation allows for maximum flexibility in timing.
These devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic levels at the output-enable (OEAB and
) inputs.
The output-enable inputs disable the device so that the buses are effectively isolated. The dual-enable configuration gives the transceivers the capability to store data by simultaneously enabling
OEAB and . Each output reinforces its input in this transceiver configuration. When both OEAB and are enabled and all other data sources to the two sets of bus lines are in the
high-impedance state, both sets of bus lines (16 total) remain at their last states. The 8-bit codes appearing on the two sets of buses are identical for the SN74ALS621A, SN74ALS623A, and
SN74AS623 or complementary for the SN74ALS620A.
The -1 versions of the SN74ALS620A and SN74ALS621A are identical to the standard versions, except that the recommended maximum IOL is increased to 48 mA in the -1 versions.
The SN74ALS620A, SN74ALS621A, SN74ALS623A, and SN74AS623 are characterized for operation from 0°C to 70°C.
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TECHNICAL DOCUMENTS
To view the following documents, Acrobat Reader 4.0 is required.
To download a document to your hard drive, right-click on the link and choose 'Save'.
Back to Top
Back to Top
DATASHEET
Full datasheet in Acrobat PDF: sn74als621a-1.pdf (155 KB,Rev.A) (Updated: 01/01/1995)
APPLICATION NOTES
View Application Notes for Digital Logic
●
●
●
●
●
●
●
●
Advanced Schottky (ALS and AS) Logic Families (SDAA010 - Updated: 08/01/1995)
Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) (SCBA012A - Updated: 08/01/1997)
Designing With Logic (Rev. C) (SDYA009C - Updated: 06/01/1997)
Evaluation of Nickel/Palladium/Gold-Finished Surface-Mount Integrated Circuits (SZZA026 - Updated: 06/20/2001)
Input and Output Characteristics of Digital Integrated Circuits (SDYA010 - Updated: 10/01/1996)
LVT-to-LVTH Conversion (SCEA010 - Updated: 12/08/1998)
Live Insertion (SDYA012 - Updated: 10/01/1996)
Logic Solutions For IEEE Std 1284 (SCEA013 - Updated: 06/01/1999)
Back to Top
RELATED DOCUMENTS
View Related Documentation for Digital Logic
●
●
●
Logic Reference Guide (SCYB004, 1032 KB - Updated: 10/23/2001)
Logic Selection Guide Second Half 2002 (Rev. R) (SDYU001R, 4274 KB - Updated: 07/19/2002)
Military Semiconductors Selection Guide 2002 (Rev. B) (SGYC003B, 1648 KB - Updated: 04/22/2002)
Back to Top
TI INVENTORY STATUS
AS OF 3:00 PM GMT, 26 Sep 2002
PRICING/AVAILABILITY/PKG
DEVICE INFORMATION
REPORTED DISTRIBUTOR INVENTORY
AS OF 3:00 PM GMT, 26 Sep 2002
STD
PACK
QTY
BUDGETARY
PRICING
QTY | $US
ORDERABLE
DEVICE
PACKAGE
TYPE|PINS
PRODUCT
CONTENT
IN PROGRESS
QTY|DATE
DISTRIBUTOR
COMPANY|REGION
STATUS
ACTIVE
TEMP (ºC)
0 TO 70
IN STOCK
LEAD TIME
IN STOCK
PURCHASE
SOP
(DW)
SN74ALS621A-
1DW
View Contents
N/A*
|
20
1KU
|
4.62
25
1475 | 03 Oct
>10k | 14 Oct
>10k | 14 Oct
>10k | 14 Oct
>10k | 21 Oct
5 WKS
SOP
(DW)
SN74ALS621A-
1DWR
View Contents
View Contents
N/A*
N/A*
ACTIVE
ACTIVE
|
|
20
20
0 TO 70
0 TO 70
1KU
1KU
|
|
4.65
4.62
2000
20
5 WKS
5 WKS
PDIP
(N)
SN74ALS621A-
1N
SOP
(NS)
SN74ALS621A-
1NSR
View Contents
N/A*
ACTIVE
|
20
1KU
|
4.62
2000
5 WKS
Table Data Updated on: 9/26/2002
Products | Applications | Support | TI&ME
© Copyright 1995-2002 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy Policy | Terms of Use
Home | Company Info | Employment | TI Global | Contact Us | Site Map
• Advanced Search
FEATURES | DESCRIPTION | DATASHEETS | PRICING/AVAILABILITY/PKG |
APPLICATION NOTES | RELATED DOCUMENTS
PRODUCT FOLDER | PRODUCT INFO:
PRODUCT SUPPORT: TRAINING
SN74ALS623A, Octal Bus Transceivers
DEVICE STATUS: ACTIVE
PARAMETER NAME SN74ALS623A
Voltage Nodes (V)
Vcc range (V)
Input Level
5
4.5 to 5.5
TTL
Output Level
TTL
Output Drive (mA) -15/24
No. of Outputs
Logic
8
True
46.5
13
Static Current
tpd max (ns)
Back to Top
FEATURES
●
●
●
Local Bus-Latch Capability
Choice of True or Inverting Logic
Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs
Back to Top
DESCRIPTION
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation allows for maximum flexibility in timing.
These devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic levels at the output-enable (OEAB and
) inputs.
The output-enable inputs disable the device so that the buses are effectively isolated. The dual-enable configuration gives the transceivers the capability to store data by simultaneously enabling
OEAB and . Each output reinforces its input in this transceiver configuration. When both OEAB and are enabled and all other data sources to the two sets of bus lines are in the
high-impedance state, both sets of bus lines (16 total) remain at their last states. The 8-bit codes appearing on the two sets of buses are identical for the SN74ALS621A, SN74ALS623A, and
SN74AS623 or complementary for the SN74ALS620A.
The -1 versions of the SN74ALS620A and SN74ALS621A are identical to the standard versions, except that the recommended maximum IOL is increased to 48 mA in the -1 versions.
The SN74ALS620A, SN74ALS621A, SN74ALS623A, and SN74AS623 are characterized for operation from 0°C to 70°C.
Back to Top
TECHNICAL DOCUMENTS
To view the following documents, Acrobat Reader 4.0 is required.
To download a document to your hard drive, right-click on the link and choose 'Save'.
Back to Top
Back to Top
DATASHEET
Full datasheet in Acrobat PDF: sn74als623a.pdf (155 KB,Rev.A) (Updated: 01/01/1995)
APPLICATION NOTES
View Application Notes for Digital Logic
●
●
●
●
●
●
●
●
Advanced Schottky (ALS and AS) Logic Families (SDAA010 - Updated: 08/01/1995)
Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) (SCBA012A - Updated: 08/01/1997)
Designing With Logic (Rev. C) (SDYA009C - Updated: 06/01/1997)
Evaluation of Nickel/Palladium/Gold-Finished Surface-Mount Integrated Circuits (SZZA026 - Updated: 06/20/2001)
Input and Output Characteristics of Digital Integrated Circuits (SDYA010 - Updated: 10/01/1996)
LVT-to-LVTH Conversion (SCEA010 - Updated: 12/08/1998)
Live Insertion (SDYA012 - Updated: 10/01/1996)
Logic Solutions For IEEE Std 1284 (SCEA013 - Updated: 06/01/1999)
Back to Top
RELATED DOCUMENTS
View Related Documentation for Digital Logic
●
●
●
Logic Reference Guide (SCYB004, 1032 KB - Updated: 10/23/2001)
Logic Selection Guide Second Half 2002 (Rev. R) (SDYU001R, 4274 KB - Updated: 07/19/2002)
Military Semiconductors Selection Guide 2002 (Rev. B) (SGYC003B, 1648 KB - Updated: 04/22/2002)
Back to Top
TI INVENTORY STATUS
AS OF 3:00 PM GMT, 26 Sep 2002
PRICING/AVAILABILITY/PKG
DEVICE INFORMATION
REPORTED DISTRIBUTOR INVENTORY
AS OF 3:00 PM GMT, 26 Sep 2002
STD
PACK
QTY
BUDGETARY
PRICING
QTY | $US
ORDERABLE
STATUS
PACKAGE
TYPE|PINS
PRODUCT
CONTENT
IN PROGRESS
QTY|DATE
DISTRIBUTOR
COMPANY|REGION
TEMP (ºC)
IN STOCK
LEAD TIME
IN STOCK
PURCHASE
DEVICE
SOP
(DW)
SN74ALS623A-
1DW
View Contents
View Contents
View Contents
View Contents
View Contents
View Contents
N/A*
N/A*
N/A*
OBSOLETE
OBSOLETE
|
|
|
|
|
|
20
20
20
20
20
20
0 TO 70
0 TO 70
0 TO 70
0 TO 70
0 TO 70
0 TO 70
1KU
1KU
1KU
1KU
1KU
1KU
|
|
|
|
|
|
Not Available
Not Available
Not Available
5 WKS
SOP
(DW)
SN74ALS623A-
1DWR
PDIP
(N)
SN74ALS623A-1N OBSOLETE
SOP
(DW)
SN74ALS623ADW
SN74ALS623ADWR
SN74ALS623AN
ACTIVE
ACTIVE
ACTIVE
1.39
1.41
1.39
25
2000
20
50
8671 | 07 Oct
8671 | 04 Oct
SOP
(DW)
N/A*
5 WKS
PDIP
(N)
19
90 |
1660
5 WKS
Sep
8644 | 07 Oct
PDIP
(N)
View Contents
N/A*
SN74ALS623AN3
OBSOLETE
|
20
0 TO 70
1KU
|
Not Available
SOP
(NS)
View Contents
N/A*
SN74ALS623ANSR
ACTIVE
|
20
1KU
|
1.39
2000
8397 | 14 Oct
5 WKS
Table Data Updated on: 9/26/2002
Products | Applications | Support | TI&ME
© Copyright 1995-2002 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy Policy | Terms of Use
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