SN54BCT544_14 [TI]
OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS;
| 型号： | SN54BCT544_14 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS 输出元件 |
| 文件： | 总6页 (文件大小：92K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993
SN54BCT544 . . . JT OR W PACKAGE
SN74BCT544 . . . DW OR NT PACKAGE
(TOP VIEW)
• State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
• ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
LEBA
OEBA
A1
1
2
3
4
5
6
7
8
9
10
24
V
CC
• Power-Up High-Impedance State
• 3-State Inverting Outputs
• Back-to-Back Registers for Storage
23 CEBA
22 B1
21 B2
20 B3
19 B4
18 B5
17 B6
16 B7
A2
A3
A4
A5
A6
A7
A8
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (JT, NT)
15
B8
description
CEAB 11
GND 12
14 LEAB
13 OEAB
The ′BCT544 octal registered transceiver
contains two sets of D-type latches for temporary
storage of data flowing in either direction.
Separate latch-enable (LEAB or LEBA) and
output-enable (OEAB or OEBA) inputs are
provided for each register to permit independent
control in either direction of data flow.
SN54BCT544 . . . FK PACKAGE
(TOP VIEW)
The A-to-B enable (CEAB) input must be low in
order to enter data from A or to output data from
B. If CEAB is low and LEAB is low, the A-to-B
latches are transparent; a subsequent low-to-high
transitionofLEABputstheAlatchesinthestorage
mode. With CEAB and OEAB both low, the 3-state
B outputs are active and reflect the inverted data
present at the output of the A latches. Data flow
from B to A is similar, but requires using the CEBA,
LEBA, and OEBA inputs.
4
3
2
1
28 27 26
25
5
6
7
8
9
A2
A3
A4
NC
A5
A6
A7
B2
B3
B4
24
23
22 NC
21 B5
20 B6
19 B7
10
11
12 13 14 15 16 17 18
The SN54BCT544 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT544 is characterized for
operation from 0°C to 70°C.
NC – No internal connection
†
FUNCTION TABLE
INPUTS
OUTPUT
B
CEAB
LEAB
OEAB
A
X
X
X
L
H
L
L
L
L
X
X
H
L
X
H
L
Z
Z
‡
B
0
L
H
L
L
L
H
†
‡
A-to-B data flow is shown; B-to-A flow control is the same
except that it uses CEBA, LEBA, and OEBA.
Output level before the indicated steady-state input
conditions were established.
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993
†
logic symbol
2
OEBA
23
1EN3
G1
CEBA
1
1C5
2EN4
G2
LEBA
13
OEAB
11
CEAB
14
2C6
LEAB
3
22
A1
5D
4
B1
3
6D
21
20
19
4
B2
B3
B4
A2
5
A3
6
A4
7
18
17
16
A5
B5
B6
B7
8
A6
9
A7
15
10
B8
A8
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
2
OEBA
23
CEBA
1
LEBA
13
OEAB
11
CEAB
14
LEAB
C1
1D
3
A1
22
B1
C1
1D
To Seven Other Channels
Pin numbers shown are for the DW, JT, NT, and W packages.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993
†
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 7 V
O
Voltage range applied to any output in the high state, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to V
O
CC
Input clamp current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA
Current into any output in the low state: SN54BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 negative voltage rating may be exceeded if the input clamp-current rating is observed.
recommended operating conditions
SN54BCT544
SN74BCT544
MIN NOM MAX
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
–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
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54BCT544
SN74BCT544
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
= –3 mA
= –12 mA
= –15 mA
= –3 mA
= 48 mA
= 64 mA
2.4
2
3.3
3.2
2.4
3.3
3.1
OH
OH
OH
OH
OL
OL
CC
V
OH
V
2
V
V
= 4.75 V,
= 4.5 V
2.7
CC
0.38
0.55
V
OL
V
CC
0.42
0.55
0.4
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
= 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
20
IH
‡
V = 0.5 V
I
–0.6
–225
11
–0.6
–225
11
mA
mA
mA
mA
mA
pF
IL
§
V
O
= 0
–100
–100
OS
7
43
9
7
43
9
CCH
CCL
CCZ
68
68
15
15
C
C
V = 2.5 V or 0.5 V
I
6
6
i
= 5 V,
V
O
= 2.5 V or 0.5 V
16
16
pF
io
†
‡
§
All typical values are at V
For I/O ports, the parameters I and I include the off-state output current.
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
= 5 V, T = 25°C.
A
IH IL
CC
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
V
T
= 5 V,
= 25°C
CC
A
SN54BCT544 SN74BCT544
UNIT
MIN
7
MAX
MIN
8
MAX
MIN
7
MAX
t
w
t
su
t
h
Pulse duration, LEAB or LEBA low
Setup time, data before LEAB or LEBA↑
Hold time, data after LEAB or LEBA↑
ns
ns
ns
High or low
High or low
5
5.5
1
5
1
1
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C = 50 pF, R = 500 Ω (unless otherwise noted) (see Note 2)
L
L
V
T
= 5 V,
= 25°C
CC
A
SN54BCT544 SN74BCT544
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
MIN
2.4
3
MAX
7.6
MIN
2.4
3
MAX
10.3
8.9
MIN
2.4
3
MAX
9.7
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
A or B
B or A
A
ns
ns
ns
ns
ns
7.6
8.5
3.5
4.8
3.5
4.8
3
10.3
10.2
10.3
10.3
10.1
11.8
7.5
3.5
4.8
3.5
4.8
3
14.2
12.7
14.4
12.8
13.1
14.2
8.9
3.5
4.8
3.5
4.8
3
13.3
12.3
13.4
12.4
12.7
13.9
8.5
LEBA
LEAB
B
A or B
A or B
OE or CE
OE or CE
5.1
2.8
2.3
5.1
2
5.1
2.8
2.3
7.2
2.3
9
8.2
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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Copyright 1998, Texas Instruments Incorporated
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