SNJ54BCT620AFK [TI]
具有三态输出的八路总线收发器 | FK | 20 | -55 to 125;
| 型号： | SNJ54BCT620AFK |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 具有三态输出的八路总线收发器 | FK | 20 | -55 to 125 驱动 总线驱动器 总线收发器 |
| 文件： | 总5页 (文件大小：81K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54BCT620A, SN74BCT620A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS001B – SEPTEMBER 1987 – REVISED NOVEMBER 1993
SN54BCT620A . . . J OR W PACKAGE
SN74BCT620A . . . DW OR N PACKAGE
(TOP VIEW)
• State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
• P-N-P Inputs Reduce DC Loading
• ESD Protection Exceeds 2000 V
OEAB
A1
V
CC
OEBA
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
Per MIL-STD-883C, Method 3015
• Package Options Include Plastic
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
description
The ′BCT620A bus transceiver is designed for
asynchronous communication between data
buses. Thecontrolfunctionimplementationallows
for maximum flexibility in timing. The ′BCT620A
provides inverted data at its outputs.
GND 10
11 B8
SN54BCT620A . . . FK PACKAGE
(TOP VIEW)
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.
3
2
1
20 19
18
B1
17 B2
A3
A4
A5
A6
A7
4
5
6
7
8
The output-enable inputs can be used to disable
the device so that the buses are effectively
isolated. The dual-enable configuration gives the
transceivers the capability of storing data by
simultaneously enabling OEAB and OEBA. When
both OEAB and OEBA are enabled and all other
datasourcestothetwosetsofbuslinesareathigh
impedance, both sets of bus lines (16 in all) will
remain at their last states. In this way, each output
reinforces its input in this configuration.
16
15
14
B3
B4
B5
9 10 11 12 13
The SN54BCT620A is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT620A is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OEBA
OEAB
L
L
B data to A bus
B data to A bus,
A data to B bus
L
H
H
H
L
Isolation
H
A data to B bus
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
SN54BCT620A, SN74BCT620A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS001B – SEPTEMBER 1987 – REVISED NOVEMBER 1993
†
logic symbol
logic diagram (positive logic)
19
19
OEBA
EN1
EN2
OEBA
OEAB
1
1
OEAB
2
18
A1
B1
1
1
1
2
17
16
15
3
4
2
18
B2
B3
B4
A2
A3
A1
B1
5
6
A4
A5
14
13
12
B5
B6
B7
7
A6
8
9
A7
A8
11
B8
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: Control inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
I/O ports (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA
IK
Current into any output in the low state: SN54BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 voltage ratings may be exceeded if the input and output current ratings are observed.
recommended operating conditions
SN54BCT620A
MIN NOM MAX
SN74BCT620A
UNIT
MIN NOM
MAX
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
–3
0.8
–18
–3
V
I
IK
mA
A port
B port
A port
B port
I
High-level output current
mA
OH
OL
–12
20
–15
24
I
Low-level output current
mA
48
64
T
A
Operating free-air temperature
–55
125
0
70
°C
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT620A, SN74BCT620A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS001B – SEPTEMBER 1987 – REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54BCT620A
SN74BCT620A
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
I
I
I
I
= –1 mA
= –3 mA
= –3 mA
= –12 mA
= –15 mA
= 20 mA
= 24 mA
= 48 mA
= 64 mA
2.5
2.4
2.4
2
3.4
3.3
3.3
3.2
2.5
2.4
2.4
3.4
3.3
3.3
OH
OH
OH
OH
OH
OL
OL
OL
OL
A port
B port
CC
V
OH
V
V
V
CC
= 4.5 V
2
3.1
0.35
0.42
0.3
0.5
A port
B port
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 4.5 V
= 4.5 V
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
0.5
V
OL
0.38
0.55
0.55
1
A or B port
OEAB or OEBA
A or B port
OEAB or OEBA
A or B port
OEAB or OEBA
A port
1
0.1
V = 5.5 V
I
mA
µA
I
I
0.1
70
70
‡
V = 2.7 V
I
I
IH
20
20
–0.65
–0.6
–150
–225
84
–0.65
–0.6
–150
–225
84
‡
V = 0.5 V
I
mA
mA
I
IL
–60
–60
§
V
O
= 0
I
OS
B port
–100
–100
I
I
I
A to B
V
CC
V
CC
V
CC
V
CC
= 5.5 V
= 5.5 V
= 5.5 V
= 5 V,
53
23
4
53
23
4
mA
mA
mA
pF
CCL
CCH
CCZ
A to B
37
37
10
10
C
OEAB or OEBA
A to B
V = 2.5 V or 0.5 V
I
5
5
i
9
9
C
V
CC
= 5 V,
V = 2.5 V or 0.5 V
O
pF
io
B to A
12
12
†
‡
§
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
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT620A, SN74BCT620A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS001B – SEPTEMBER 1987 – REVISED NOVEMBER 1993
switching characteristics (see Note 2)
V
C
= 5 V,
= 50 pF,
V
= 4.5 V to 5.5 V,
C = 50 pF,
L
CC
L
CC
R1 = 500 Ω,
R2 = 500 Ω,
T
A
R1 = 500 Ω,
R2 = 500 Ω,
†
T = MIN to MAX
A
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
= 25°C
′BCT620A
TYP
3.4
SN54BCT620A SN74BCT620A
MIN
0.6
0.1
0.9
0.1
3.5
3.7
3.1
1.3
2
MAX
5.2
3.4
6
MIN
0.6
0.1
0.9
0.1
3.5
3.7
3.1
1.3
2
MAX
6.2
3.7
7.2
4
MIN
0.6
0.1
0.9
0.1
3.5
3.7
3.1
1.3
2
MAX
5.8
3.6
6.9
3.9
10.6
11.1
10
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
B
A
A
A
B
B
ns
ns
ns
ns
ns
ns
1.9
4.1
2
3.7
9.2
9.9
8.6
6.9
6.7
8.1
7
7.2
10.9
11.5
10.8
8.3
7.9
9.2
8.5
6
OEBA
OEBA
OEAB
OEAB
7.6
5.3
4.4
7.8
7.4
9
5.3
2.9
2.1
0.1
6.1
2.9
2.1
0.1
2.9
2.1
0.1
5.2
8.1
5.9
3.7
5.3
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
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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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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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