The HD74HCT242 is an inverting buffer and the HD74HCT243 is a noninverting buffer. Each device has one active high enable (GBA), and one active low enable (GAB). GBA enables the A outputs and GAB enables the B outputs. The device does not have schmitt trigger inputs. Features • • • • • • LSTTL Output Logic Level Compatibility as well as CMOS Output Compatib.
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• LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (A to Y) = 9.5 ns typ (C L = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 4.5 to 5.5 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
HD74HCT242 Control Inputs GAB H L H L I O O Z : : : : GBA H H L L Input Output Inverting Output High Impedance Data Port Status A O Z Z I B I Z Z O HD74HCT243 Data Port Status A O Z Z I B I Z Z O
HD74HCT242/HD74HCT243
Pin Arrangement
GAB NC 1A 2A 3A.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | HD74HCT240 |
Hitachi Semiconductor |
Octal Buffers/Line Drivers/Line Receivers(with inverted 3-state outputs) | |
2 | HD74HCT241 |
Hitachi Semiconductor |
Octal Buffers/Line Drivers/Line Receivers(with noninverted 3-state outputs) | |
3 | HD74HCT243 |
Hitachi Semiconductor |
Quad. Bus Transceivers (with 3-state outputs) | |
4 | HD74HCT244 |
Hitachi Semiconductor |
Octal Buffers/Line Drivers/Line Receivers(noninverted 3-state outputs) | |
5 | HD74HCT245 |
Hitachi Semiconductor |
Octal Bus Transceivers (with 3-state outputs) | |
6 | HD74HCT237 |
Hitachi Semiconductor |
3-to-8-line Decoder/Demultiplexer with Address Latch | |
7 | HD74HCT238 |
Hitachi Semiconductor |
3-to-8-line Decoder/Demultiplexer | |
8 | HD74HCT238 |
Renesas |
3-to-8-line Decoder/Demultiplexer | |
9 | HD74HCT00A |
Hitachi Semiconductor |
Quad. 2-input Positive NAND Gates | |
10 | HD74HCT04A |
Hitachi Semiconductor |
Hex Inverters | |
11 | HD74HCT08A |
Hitachi Semiconductor |
Quad. 2-input Positive AND Gates | |
12 | HD74HCT125 |
Hitachi Semiconductor |
Quad. Bus Buffer Gates (with 3-state outputs) |