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ꢊ ꢅꢋꢌꢍ ꢎꢏꢐ ꢐ ꢑꢒꢀ ꢌꢁꢓ ꢍ ꢔꢁꢑ ꢓ ꢒꢔ ꢕ ꢑꢒ
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ꢖ ꢔꢋ ꢄ ꢗ ꢘꢀꢋꢌꢋ ꢑ ꢊ ꢏꢋ ꢙꢏ ꢋ
SCLS128D − DECEMBER 1982 − REVISED AUGUST 2003
D
D
Wide Operating Voltage Range of 2 V to 6 V
D
D
D
6-mA Output Drive at 5 V
High-Current Outputs Drive Up To 15
LSTTL Loads
Low Input Current of 1 µA Max
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
D
Low Power Consumption, 80-µA Max I
CC
D
Typical t = 9 ns
pd
SN54HC240 . . . J OR W PACKAGE
SN74HC240 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54HC240 . . . FK PACKAGE
(TOP VIEW)
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
13
12
11
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
3
2
1
20 19
18
1A2
2Y3
1A3
2Y2
1A4
1Y1
2A4
1Y2
2A3
4
5
6
7
8
17
16
15
14 1Y3
9 10 11 12 13
description/ordering information
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 ’HC240
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.
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
Reel of 2000
Tube of 70
Reel of 2000
Reel of 250
Tube of 20
Tube of 85
Tube of 55
SN74HC240N
SN74HC240N
SN74HC240DW
SN74HC240DWR
SN74HC240NSR
SN74HC240DBR
SN74HC240PW
SN74HC240PWR
SN74HC240PWT
SNJ54HC240J
SOIC − DW
HC240
SOP − NS
HC240
HC240
−40°C to 85°C
SSOP − DB
TSSOP − PW
HC240
CDIP − J
CFP − W
LCCC − FK
SNJ54HC240J
SNJ54HC240W
SNJ54HC240FK
SNJ54HC240W
SNJ54HC240FK
−55°C to 125°C
†
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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