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SN74BCT25244 Datasheet Preview

SN74BCT25244 Datasheet

OCTAL BUFFERS/DRIVERS

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State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
Designed to Facilitate Incident-Wave
Switching for Line Impedances of 25
or Greater
Distributed VCC and GND Pins Minimize
Noise Generated by the Simultaneous
Switching of Outputs
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)
description
These 25-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.
These buffers are capable of sinking 188-mA IOL,
which facilitates switching 25-transmission
lines on the incident wave. The distributed VCC
and GND pins minimize switching noise for more
reliable system operation.
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.
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.
SN54BCT25244, SN74BCT25244
25-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)
1Y1 1
GND 2
1Y2 3
1Y3 4
GND 5
1Y4 6
2Y1 7
GND 8
2Y2 9
2Y3 10
GND 11
2Y4 12
24 1OE
23 1A1
22 1A2
21 VCC
20 1A3
19 1A4
18 2A1
17 2A2
16 VCC
15 2A3
14 2A4
13 2OE
SN54BCT25244 . . . FK PACKAGE
(TOP VIEW)
1A3
VCC
1A2
NC
1A1
1OE
1Y1
4 3 2 1 28 27 26
5
25
6
24
7
23
8
22
9
21
10
20
11
19
12 13 14 15 16 17 18
2OE
2Y4
GND
NC
2Y3
2Y2
GND
NC – No internal connection
FUNCTION TABLE
(each buffer/driver)
INPUTS
OE
A
OUTPUT
Y
L
H
H
L
L
L
H
X
Z
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
2–1




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SN74BCT25244 Datasheet Preview

SN74BCT25244 Datasheet

OCTAL BUFFERS/DRIVERS

No Preview Available !

SN54BCT25244, SN74BCT25244
25-OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS064A – JUNE 1990 – REVISED NOVEMBER 1993
logic symbol
logic diagram (positive logic)
24
1OE
23
1A1
22
1A2
20
1A3
19
1A4
EN
1
1
1Y1
3
1Y2
4
1Y3
6
1Y4
13
2OE
EN
18
7
2A1
1
2Y1
17
9
2A2
2Y2
15
10
2A3
2Y3
14
12
2A4
2Y4
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
24
1OE
1A1 23
22
1A2
1A3 20
1A4 19
13
2OE
2A1 18
2A2 17
1 1Y1
3 1Y2
4 1Y3
6 1Y4
7 2Y1
9 2Y2
2A3 15
10 2Y3
Pin numbers shown are for the DW, JT, NT, and W packages.
2A4 14
12 2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA
Current into any output in the low state, IO: SN54BCT25244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mA
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


Part Number SN74BCT25244
Description OCTAL BUFFERS/DRIVERS
Maker etcTI
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