The M54/74HC620/623 are high speed CMOS OCTAL BUS TRANSCEIVERS fabricated in silicon 2 gate C MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power consumption. These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation allows maximum .
allows maximum flexibility in timing. These devices allow data transmission from the A bus to B bus or from the B to the A bus depending upon the logic levels at the enable inputs (GBA and GAB). The enable inputs can be used to disable the device so that the buses are effectively isolated. The dual-enable configuration gives these devices the capability to store data by simultaneous enabling of GBA and GAB. Each output reinforces its input in this transceiver configuration. Thus, when both control inputs are enabled and all other data sources to the two sets of bus lines are at high impedance,.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | M74HC620 |
ST Microelectronics |
OCTAL BUS TRANSCEIVER | |
2 | M74HC640 |
ST Microelectronics |
OCTAL BUS TRANSCEIVER | |
3 | M74HC643 |
ST Microelectronics |
OCTAL BUS TRANSCEIVER | |
4 | M74HC643-1FP |
Mitsubishi |
Octal 3-State Inverting and Noninverting Bus Transceiver | |
5 | M74HC643-1P |
Mitsubishi |
Octal 3-State Inverting and Noninverting Bus Transceiver | |
6 | M74HC646 |
ST Microelectronics |
HC648 OCTAL BUS TRANSCEIVER/REGISTER | |
7 | M74HC648 |
ST Microelectronics |
HC648 OCTAL BUS TRANSCEIVER/REGISTER | |
8 | M74HC651 |
ST Microelectronics |
HC652 OCTAL BUS TRANSCEIVER/REGISTER | |
9 | M74HC652 |
ST Microelectronics |
HC652 OCTAL BUS TRANSCEIVER/REGISTER | |
10 | M74HC670 |
ST Microelectronics |
4 WORD X 4-BIT REGISTER | |
11 | M74HC688 |
ST Microelectronics |
8 BIT EQUALITY COMPARATOR | |
12 | M74HC690 |
ST Microelectronics |
HC691/693 4 BIT BINARY COUNTER/REGISTER |