SN74BCT757 [TI]
OCTAL BUFFER/DRIVER WITH OPEN-COLLECTOR OUTPUTS; 八路缓冲器/驱动器，集电极开路输出
| 型号： | SN74BCT757 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OCTAL BUFFER/DRIVER WITH OPEN-COLLECTOR OUTPUTS |
| 文件： | 总5页 (文件大小：71K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74BCT757
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS041D – NOVEMBER 1989 – REVISED NOVEMBER 1993
DW OR N PACKAGE
(TOP VIEW)
• 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)
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
2OE
1Y1
2A4
1Y2
2A3
1Y3
• Open-Collector Outputs Drive Bus Lines
or Buffer Memory Address Registers
• Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (N)
13 2A2
12 1Y4
description
11
2A1
This octal buffer and line driver is designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters.
This
device
provides
complementary output-enable (OE and OE)
inputs and noninverting outputs.
The SN74BCT757 is characterized for operation
from 0°C to 70°C.
FUNCTION TABLES
INPUTS
OUTPUT
1Y
1OE
1A
X
H
L
L
H
L
L
H
H
INPUTS
OUTPUT
2Y
2OE
L
2A
X
H
L
H
L
H
H
H
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
SN74BCT757
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS041D – NOVEMBER 1989 – REVISED NOVEMBER 1993
†
logic symbol
logic diagram (positive logic)
1
1
1OE
EN
1OE
2
4
6
8
18
16
14
12
18
16
2
1Y1
1Y2
1Y3
1Y4
1A1
1A1
1A2
1A3
1A4
1Y1
1Y2
1Y3
1Y4
4
1A2
14
12
6
1A3
19
2OE
EN
8
1A4
11
13
15
17
9
7
5
3
2A1
2A2
2A3
2A4
2Y1
2Y2
2Y3
2Y4
19
2OE
9
7
11
2Y1
2Y2
2A1
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
13
2A2
5
3
15
2A3
2Y3
2Y4
17
2A4
‡
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
I
Input current range, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA to 5 mA
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
Current into any output in the low state, I
Operating free-air temperature range
O
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
O
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.
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74BCT757
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS041D – NOVEMBER 1989 – REVISED NOVEMBER 1993
recommended operating conditions (see Note 1)
MIN NOM
MAX
UNIT
V
V
V
V
V
Supply voltage
4.5
2
5
5.5
CC
High-level input voltage
Low-level input voltage
High-level output voltage
Input clamp current
V
IH
0.8
5.5
–18
64
V
IL
V
OH
I
I
mA
mA
°C
IK
Low-level output current
Operating free-air temperature
OL
T
A
0
70
NOTE 1: Unused or floating inputs must be held high or low.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
†
PARAMETER
TEST CONDITIONS
I = –18 mA
MIN TYP
MAX
–1.2
0.55
0.1
20
UNIT
V
V
V
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,
= 4.5 V,
IK
I
I
= 64 mA
0.42
V
OL
OL
V = 7 V
I
I
I
I
mA
µA
mA
mA
I
I
V = 2.7 V
I
IH
V = 0.5 V
I
–1
IL
V
OH
= 5.5 V
0.1
34
OH
Outputs high
I
V
CC
= 5.5 V,
Outputs open
Outputs low
77
mA
CC
OE and OE inactive
10
C
C
V
V
= 5 V,
= 5 V,
V = 2.5 V or 0.5 V
6
4
pF
pF
i
CC
I
V
O
= 2.5 V or 0.5 V
o
CC
†
All typical values are at V
= 5 V, T = 25°C.
A
CC
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
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
MIN
MAX
UNIT
MIN
6.9
2.4
11
TYP
8.3
MAX
9.6
t
t
t
t
t
t
6.6
2
10.1
6.6
19.7
6.9
18
PLH
PHL
PLH
PHL
PLH
PHL
A
Y
Y
Y
ns
ns
ns
4.2
6
14.8
4.6
17.9
6.2
10.8
2.6
10
2OE
1OE
2.9
11.4
4.4
13.9
6.1
16.1
7.8
4
8.5
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
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
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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