CD54/74HC240, CD54/74HCT240,
CD74HC241, CD54/74HCT241,
CD54/74HC244, CD54/74HCT244
High-Speed CMOS Logic
Data sheet acquired from Harris Semiconductor
SCHS167E
November 1997 - Revised October 2004
Octal Buffer/Line Drivers, Three-State
Features
Ordering Information
• HC/HCT240 Inverting
TEMP. RANGE
o
PART NUMBER
CD54HC240F3A
CD54HC244F3A
CD54HCT240F3A
CD54HCT241F3A
CD54HCT244F3A
CD74HC240E
( C)
PACKAGE
20 Ld CERDIP
20 Ld CERDIP
20 Ld CERDIP
20 Ld CERDIP
20 Ld CERDIP
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld TSSOP
20 Ld TSSOP
20 Ld TSSOP
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
• HC/HCT241 Non-Inverting
• HC/HCT244 Non-Inverting
[ /Title
(CD74
HC240
,
CD74
HCT24
0,
CD74
HC241
,
CD74
HCT24
1,
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
• Typical Propagation Delay = 8ns at V
o
= 5V,
CC
C = 15pF, T = 25 C for HC240
L
A
• Three-State Outputs
• Buffered Inputs
• High-Current Bus Driver Outputs
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
CD74HC240M
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C
• Balanced Propagation Delay and Transition Times
CD74HC240M96
CD74HC241E
• Significant Power Reduction Compared to LSTTL
Logic ICs
CD74HC241M
CD74
HC244
,
CD74HC241M96
CD74HC244E
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N = 30%, N = 30% of V
IL IH CC
CD74
CD74HC244M
at V
= 5V
CC
• HCT Types
CD74HC244M96
CD74HCT240E
CD74HCT240M
CD74HCT240M96
CD74HCT240PW
CD74HCT240PWR
CD74HCT240PWT
CD74HCT241E
CD74HCT241M
CD74HCT241M96
CD74HCT244E
CD74HCT244M
CD74HCT244M96
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V = 0.8V (Max), V = 2V (Min)
IL IH
- CMOS Input Compatibility, I ≤ 1µA at V , V
OL OH
l
Description
The ’HC240 and ’HCT240 are inverting three-state buffers
having two active-low output enables. The CD74HC241,
’HCT241, ’HC244 and ’HCT244 are non-inverting three-
state buffers that differ only in that the 241 has one active-
high and one active-low output enable, and the 244 has two
active-low output enables. All three types have identical
pinouts.
NOTE: When ordering, use the entire part number. The suffixes 96
and R denote tape and reel. The suffix T denotes a small-quantity
reel of 250.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2004, Texas Instruments Incorporated
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