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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. PART NUM.
• HC/HCT240 Inverting
• HC/HCT241 Non-inverting
• HC/HCT244 Non-inverting
• Typical propagation delay = 8ns at VCC = 5 V,
CL = 15 pF, TA = 25℃ for HC240
• Three-state outputs
• Buffered inputs
• High-current bus driver outputs
• Fanout (over temperature range)
– Standard outputs: 10 LSTTL loads
– Bus driver outputs: 15 LSTTL loads
• Wide operating temperature range:
–55℃ to 125℃
• Balanced propagation delay and transition times
• Significant power reduction compared to LSTTL Logic ICs
• HC types:
– 2 V to 6 V operation
– High noise immunity: NIL = 30%, NIH = 30% of
VCC at VCC = 5 V
• HCT types.
54HC240 - STMicroelectronics
The M54HCxxx and M54HCTxxx series is composed of CMOS functions specifically designed to meet the radiation requirements.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | 54HC241 |
Texas Instruments |
High-Speed CMOS Logic Octal Buffer/Line Drivers |
|
| 2 | 54HC244 |
STMicroelectronics |
Rad-hard high speed 2 to 6V CMOS logic |
|
| 3 | 54HC244 |
Texas Instruments |
Octal Buffers and Line Drivers |
|
| 4 | 54HC245 |
STMicroelectronics |
Rad-hard high speed 2 to 6V CMOS logic |
|
| 5 | 54HC245 |
Texas Instruments |
Octal Bus Transceivers |
|
| 6 | 54HC245 |
Motorola Semiconductor |
OCTAL BUS TRANSCEIVER |
|
| 7 | 54HC21 |
STMicroelectronics |
DUAL 4-INPUT AND GATE |
|
| 8 | 54HC237 |
STMicroelectronics |
Rad-hard high speed 2 to 6V CMOS logic |
|
| 9 | 54HC237 |
Texas Instruments |
High-Speed CMOS Logic 3 to 8-Line Decoder/Demultiplexer |
|
| 10 | 54HC251 |
STMicroelectronics |
Rad-hard high speed 2 to 6V CMOS logic |
|
| 11 | 54HC251 |
Texas Instruments |
Data Selectors/Multiplexers |
|
| 12 | 54HC257 |
Texas Instruments |
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS |
|