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ꢖ ꢔꢆ ꢄ ꢗ ꢘꢀꢆꢌꢆ ꢑ ꢋ ꢏꢆ ꢙ ꢏꢆ
SCLS174E − MARCH 1984 − REVISED AUGUST 2003
SN54HCT240 . . . J OR W PACKAGE
SN74HCT240 . . . DW, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
Operating Voltage Range of 4.5 V to 5.5 V
High-Current Outputs Drive Up To 15
LSTTL Loads
D
D
D
D
D
D
Low Power Consumption, 80-µA Max I
Typical t = 12 ns
pd
6-mA Output Drive at 5 V
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
1
2
3
4
5
6
7
8
9
20
V
CC
CC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
description/ordering information
GND 10
These 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. The ’HCT240 devices are organized
as two 4-bit buffers/drivers with separate
output-enable (OE) inputs. When OE is low, the
device passes inverted data from the A inputs to
the Y outputs. When OE is high, the outputs are
in the high-impedance state.
SN54HCT240 . . . FK PACKAGE
(TOP VIEW)
3
2
1
20 19
18
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
4
5
6
7
8
17
16
15
14
9 10 11 12 13
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP − N
Tube of 20
Tube of 25
Reel of 2000
Reel of 2000
Tube of 70
Reel of 2000
Reel of 250
Tube of 20
Tube of 85
Tube of 55
SN74HCT240N
SN74HCT240N
SN74HCT240DW
SN74HCT240DWR
SN74HCT240NSR
SN74HCT240PW
SN74HCT240PWR
SN74HCT240PWT
SNJ54HCT240J
SOIC − DW
SOP − NS
HCT240
HCT240
−40°C to 85°C
TSSOP − PW
HT240
CDIP − J
CFP − W
LCCC − FK
SNJ54HCT240J
SNJ54HCT240W
SNJ54HCT240W
SNJ54HCT240FK
−55°C to 125°C
SNJ54HCT240FK
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Copyright 2003, Texas Instruments Incorporated
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