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SN74HC240N Datasheet Preview

SN74HC240N Datasheet

OCTAL BUFFERS AND LINE DRIVERS

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D Wide Operating Voltage Range of 2 V to 6 V
D High-Current Outputs Drive Up To 15
LSTTL Loads
D Low Power Consumption, 80-µA Max ICC
D Typical tpd = 9 ns
SN54HC240 . . . J OR W PACKAGE
SN74HC240 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54HC240, SN74HC240
OCTAL BUFFERS AND LINE DRIVERS
WITH 3ĆSTATE OUTPUTS
SCLS128D − DECEMBER 1982 − REVISED AUGUST 2003
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
SN54HC240 . . . FK PACKAGE
(TOP VIEW)
1OE 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
20 VCC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
1A2
3 2 1 20 19
4
18
1Y1
2Y3 5
17 2A4
1A3 6
16 1Y2
2Y2 7
15 2A3
1A4 8
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
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube of 20
SN74HC240N
SN74HC240N
SOIC − DW
Tube of 25
Reel of 2000
SN74HC240DW
SN74HC240DWR
HC240
−40°C to 85°C
SOP − NS
SSOP − DB
Reel of 2000
Reel of 2000
SN74HC240NSR
SN74HC240DBR
HC240
HC240
Tube of 70
SN74HC240PW
TSSOP − PW
Reel of 2000
Reel of 250
SN74HC240PWR
SN74HC240PWT
HC240
CDIP − J
Tube of 20
SNJ54HC240J
SNJ54HC240J
−55°C to 125°C CFP − W
Tube of 85
SNJ54HC240W
SNJ54HC240W
LCCC − FK
Tube of 55
SNJ54HC240FK
SNJ54HC240FK
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2003, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
1




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SN74HC240N Datasheet Preview

SN74HC240N Datasheet

OCTAL BUFFERS AND LINE DRIVERS

No Preview Available !

SN54HC240, SN74HC240
OCTAL BUFFERS AND LINE DRIVERS
WITH 3ĆSTATE OUTPUTS
SCLS128D − DECEMBER 1982 − REVISED AUGUST 2003
FUNCTION TABLE
(each buffer/driver)
INPUTS
OE
A
OUTPUT
Y
L
H
L
L
L
H
H
X
Z
logic diagram (positive logic)
1
1OE
19
2OE
2
1A1
4
1A2
18
1Y1
16
1Y2
11
2A1
13
2A2
6
1A3
14
1Y3
15
2A3
8
1A4
12
1Y4
2A4 17
9
2Y1
7
2Y2
5
2Y3
3 2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA
Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74HC240N
Description OCTAL BUFFERS AND LINE DRIVERS
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