SN54HCT240, SN74HCT240
OCTAL BUFFERS AND LINE DRIVERS
WITH 3 STATE OUTPUTS
SCLS174E − MARCH 1984 − REVISED AUGUST 2003
D
Operating Voltage Range of 4.5 V to 5.5 V
D
High-Current Outputs Drive Up To 15
D
D
D
D
D
D
LSTTL Loads
Low Power Consumption, 80-µA Max I
CC
Typical t
pd
= 12 ns
±6-mA
Output Drive at 5 V
Low Input Current of 1
µA
Max
Inputs Are TTL-Voltage Compatible
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
SN54HCT240 . . . J OR W PACKAGE
SN74HCT240 . . . DW, N, NS, OR PW PACKAGE
(TOP VIEW)
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 ’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.
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
SN54HCT240 . . . FK PACKAGE
(TOP VIEW)
1A2
2Y3
1A3
2Y2
1A4
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
2Y4
1A1
1OE
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
ORDERING INFORMATION
TA
PDIP − N
SOIC − DW
−40 C 85°C
−40°C to 85 C
SOP − NS
PACKAGE†
Tube of 20
Tube of 25
Reel of 2000
Reel of 2000
Tube of 70
TSSOP − PW
CDIP − J
−55 C 125°C
−55°C to 125 C
CFP − W
Reel of 2000
Reel of 250
Tube of 20
Tube of 85
ORDERABLE
PART NUMBER
SN74HCT240N
SN74HCT240DW
SN74HCT240DWR
SN74HCT240NSR
SN74HCT240PW
SN74HCT240PWR
SN74HCT240PWT
SNJ54HCT240J
SNJ54HCT240W
SNJ54HCT240J
SNJ54HCT240W
HT240
HCT240
HCT240
TOP-SIDE
MARKING
SN74HCT240N
LCCC − FK
Tube of 55
SNJ54HCT240FK
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.
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.
On products compliant to MIL PRF 38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
Copyright
2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
2Y1
GND
2A1
1Y4
2A2
1
TI [ TEXAS INSTRUMENTS ]
