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SN54HCT240 Datasheet Preview

SN54HCT240 Datasheet

OCTAL BUFFERS AND LINE DRIVER

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D Operating Voltage Range of 4.5 V to 5.5 V
D High-Current Outputs Drive Up To 15
LSTTL Loads
D Low Power Consumption, 80-µA Max ICC
D Typical tpd = 12 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D Inputs Are TTL-Voltage Compatible
D 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
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.
SN54HCT240, SN74HCT240
OCTAL BUFFERS AND LINE DRIVERS
WITH 3ĆSTATE OUTPUTS
SCLS174E − MARCH 1984 − REVISED AUGUST 2003
SN54HCT240 . . . J OR W PACKAGE
SN74HCT240 . . . DW, N, NS, OR PW 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
SN54HCT240 . . . FK PACKAGE
(TOP VIEW)
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
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube of 20
SN74HCT240N
SN74HCT240N
SOIC − DW
Tube of 25
Reel of 2000
SN74HCT240DW
SN74HCT240DWR
HCT240
−40°C to 85°C SOP − NS
Reel of 2000
Tube of 70
SN74HCT240NSR
SN74HCT240PW
HCT240
TSSOP − PW
Reel of 2000
Reel of 250
SN74HCT240PWR
SN74HCT240PWT
HT240
CDIP − J
Tube of 20
SNJ54HCT240J
SNJ54HCT240J
−55°C to 125°C CFP − W
Tube of 85
SNJ54HCT240W
SNJ54HCT240W
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.
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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SN54HCT240 Datasheet Preview

SN54HCT240 Datasheet

OCTAL BUFFERS AND LINE DRIVER

No Preview Available !

SN54HCT240, SN74HCT240
OCTAL BUFFERS AND LINE DRIVERS
WITH 3ĆSTATE OUTPUTS
SCLS174E − MARCH 1984 − 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): 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 SN54HCT240
Description OCTAL BUFFERS AND LINE DRIVER
Maker etcTI
Total Page 3 Pages
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