SN74BCT25244DWE4 [TI]
25-W OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS; 25 -W八路缓冲器/驱动器，具有三态输出
| 型号： | SN74BCT25244DWE4 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 25-W OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS |
| 文件： | 总12页 (文件大小：427K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54BCT25244, SN74BCT25244
25-Ω OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS064A – JUNE 1990 – REVISED NOVEMBER 1993
SN54BCT25244 . . . JT OR W PACKAGE
SN74BCT25244 . . . 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; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
1
24
23
22
21
20
19
18
17
16
15
14
13
1Y1
GND
1Y2
1Y3
GND
1Y4
2Y1
GND
2Y2
2Y3
GND
2Y4
1OE
1A1
1A2
2
3
• Designed to Facilitate Incident-Wave
Switching for Line Impedances of 25 Ω
or Greater
4
V
CC
5
1A3
1A4
2A1
2A2
6
7
• Distributed V
and GND Pins Minimize
Noise Generated by the Simultaneous
Switching of Outputs
CC
8
9
V
CC
10
11
12
2A3
2A4
2OE
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
SN54BCT25244 . . . FK PACKAGE
(TOP VIEW)
description
These 25-Ω octal buffers and line drivers are
designed specifically to improve both the
performance and density of 3-state memory
address drivers, clock drivers, and bus-oriented
receivers and transmitters.
4
3 2 1 28 27 26
1A3
5
6
7
8
9
25 2OE
V
24 2Y4
23
CC
1A2
GND
NC
2Y3
2Y2
GND
22
21
20
19
NC
1A1
1OE
1Y1
These buffers are capable of sinking 188-mA I
,
OL
which facilitates switching 25-Ω transmission
lines on the incident wave. The distributed V
10
11
CC
and GND pins minimize switching noise for more
reliable system operation.
12 13 14 15 16 17 18
When the output-enable (1OE and 2OE) inputs
are low, the device transmits data from the
A inputs to the Y outputs. When 1OE and 2OE are
high, the outputs are in the high-impedance state.
NC – No internal connection
The SN54BCT25244 is characterized for
operation over the full military temperature range
of –55°C to 125°C. The SN74BCT25244 is
characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each buffer/driver)
INPUTS
OUTPUT
Y
OE
A
H
L
L
L
H
L
H
X
Z
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
SN54BCT25244, SN74BCT25244
25-Ω OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS064A – JUNE 1990 – REVISED NOVEMBER 1993
†
logic symbol
logic diagram (positive logic)
24
24
1OE
1OE
EN
23
22
20
19
1
3
4
6
23
1
3
4
6
1Y1
1Y2
1Y3
1Y4
1A1
1A1
1A2
1A3
1A4
1Y1
1Y2
1Y3
1Y4
1
22
1A2
20
1A3
13
2OE
EN
19
1A4
18
17
15
14
7
9
2A1
2A2
2A3
2A4
2Y1
2Y2
2Y3
2Y4
1
10
12
13
2OE
18
7
9
2A1
2Y1
2Y2
2Y3
2Y4
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
17
2A2
15
10
12
2A3
14
2A4
Pin numbers shown are for the DW, JT, NT, and W packages.
‡
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 7 V
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
O
CC
Input clamp current, I (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA
IK
I
Current into any output in the low state, I : SN54BCT25244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mA
O
SN74BCT25244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376 mA
Operating free-air temperature range: SN54BCT25244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
SN74BCT25244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54BCT25244, SN74BCT25244
25-Ω OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS064A – JUNE 1990 – REVISED NOVEMBER 1993
recommended operating conditions (see Note 2)
SN54BCT25244
SN74BCT25244
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
–53
125
125
0.8
–18
–80
188
70
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
0
NOTE 2: Unused or floating inputs must be held high or low.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54BCT25244
SN74BCT25244
PARAMETER
TEST CONDITIONS
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
V
V
V
= 4.5 V,
I = –18 mA
–1.2
–1.2
V
IK
CC
I
= 4.75 V,
I
I
I
I
I
I
= – 3 mA
= –53 mA
= –80 mA
= 94 mA
2.7
2
CC
OH
OH
OH
OL
OL
OL
V
OH
2
V
V
V
= 4.5 V
= 4.5 V
CC
CC
0.38
0.55
0.8
0.42
0.55
V
OL
V
= 125 mA
= 188 mA
0.7
0.1
20
I
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
V
CC
= 5.5 V,
= 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
0.1
20
mA
µA
mA
µA
µA
mA
mA
mA
pF
I
V = 2.7 V
I
IH
V = 0.5 V
I
–0.6
50
–0.6
50
IL
V
= 2.7 V
= 0.5 V
OZH
OZL
CCL
CCH
CCZ
O
O
V
–50
119
78
–50
119
78
Outputs open
Outputs open
Outputs open
90
59
7
90
59
7
11
11
C
C
V = 2.5 V or 0.5 V
I
5.5
17
5.5
17
i
= 5 V,
V
O
= 2.5 V or 0.5 V
pF
o
†
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 3)
L
V
T
= 5 V,
= 25°C
CC
A
SN54BCT25244
SN74BCT25244
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
MIN
1
TYP
3.2
4
MAX
4.9
5.6
8.5
9.2
5.5
7.8
MIN
1
MAX
5.6
MIN
1
MAX
5.5
6
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
A
Y
Y
Y
ns
ns
ns
2
2
6.3
2
3.2
3.7
1.6
3.1
5.6
6.3
3.6
5.3
3.2
3.7
1.6
3.1
9.7
3.2
3.7
1.6
3.1
9.3
10.2
6.3
8.4
OE
OE
10.4
6.5
9.5
NOTE 3: Load circuits and voltage waveforms are shown in Section 1.
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–4
PACKAGE OPTION ADDENDUM
www.ti.com
4-Jun-2007
PACKAGING INFORMATION
Orderable Device
SN74BCT25244DW
Status (1)
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
SOIC
DW
24
24
24
24
24
24
24
24
24
24
24
25 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SN74BCT25244DWE4
SN74BCT25244DWG4
SN74BCT25244DWR
SN74BCT25244DWRE4
SN74BCT25244DWRG4
SN74BCT25244NSR
SN74BCT25244NSRE4
SN74BCT25244NSRG4
SN74BCT25244NT
SOIC
SOIC
SOIC
SOIC
SOIC
SO
DW
DW
DW
DW
DW
NS
NS
NS
NT
25 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
25 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SO
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
SO
2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
no Sb/Br)
PDIP
PDIP
15
Pb-Free
(RoHS)
CU NIPDAU N / A for Pkg Type
SN74BCT25244NTE4
NT
15
Pb-Free
(RoHS)
CU NIPDAU N / A for Pkg Type
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
4-Jun-2007
to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
11-Mar-2008
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0 (mm)
B0 (mm)
K0 (mm)
P1
W
Pin1
Diameter Width
(mm) W1 (mm)
(mm) (mm) Quadrant
SN74BCT25244DWR
SN74BCT25244NSR
SOIC
SO
DW
NS
24
24
2000
2000
330.0
330.0
24.4
24.4
10.75
8.2
15.7
15.4
2.7
2.5
12.0
12.0
24.0
24.0
Q1
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
11-Mar-2008
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
SN74BCT25244DWR
SN74BCT25244NSR
SOIC
SO
DW
NS
24
24
2000
2000
346.0
346.0
346.0
346.0
41.0
41.0
Pack Materials-Page 2
MECHANICAL DATA
MPDI004 – OCTOBER 1994
NT (R-PDIP-T**)
PLASTIC DUAL-IN-LINE PACKAGE
24 PINS SHOWN
A
PINS **
24
28
DIM
24
13
1.260
(32,04) (36,20)
1.425
A MAX
1.230
(31,24) (35,18)
1.385
A MIN
B MAX
B MIN
0.280 (7,11)
0.250 (6,35)
0.310
(7,87)
0.315
(8,00)
1
12
0.290
(7,37)
0.295
(7,49)
0.070 (1,78) MAX
B
0.020 (0,51) MIN
0.200 (5,08) MAX
Seating Plane
0.125 (3,18) MIN
0.100 (2,54)
0.010 (0,25)
0°–15°
0.021 (0,53)
0.015 (0,38)
M
0.010 (0,25) NOM
4040050/B 04/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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