QUAD BUS TRANSCEIVER The SN54/ 74LS242 and SN54 / 74LS243 are Quad Bus Transmitters / Receivers designed for 4-line asynchronous 2-way data communications between data buses. SN54/74LS242 SN54/74LS243 • Hysteresis at Inputs to Improve Noise Immunity • 2-Way Asynchronous Data Bus Communication • Input Clamp Diodes Limit High-Speed Termination Effects LOGIC .
H (Z) H L INPUTS OUTPUT GAB L L H D L H X L H (Z) INPUTS OUTPUT GAB L H H D X L H (Z) H L
SN54/74LS243
INPUTS OUTPUT
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = HIGH Impedance
FAST AND LS TTL DATA 5-393
SN54/74LS242
• SN54/74LS243
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH Supply Voltage Operating Ambient Temperature Range Output Current — High Parameter 54 74 54 74 54, 74 54 74 IOL Output Current — Low 54 74 Min 4.5 4.75
– 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70
– 3.0
– 12
– 15 12 24 Unit V °C mA mA mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless.
These four-data-line transceivers are designed for asynchronous two-way communications between data buses. SN74LS243 can.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | SN54LS240 |
Motorola Inc |
OCTAL BUFFER/LINE DRIVER | |
2 | SN54LS240 |
Texas Instruments |
Octal Buffers and Line Drivers | |
3 | SN54LS241 |
Motorola |
OCTAL BUFFER/LINE DRIVER | |
4 | SN54LS241 |
Texas Instruments |
Octal Buffers and Line Drivers | |
5 | SN54LS242 |
Motorola Inc |
QUAD BUS TRANSCEIVER | |
6 | SN54LS244 |
Motorola |
OCTAL BUFFER/LINE DRIVER | |
7 | SN54LS244 |
Texas Instruments |
Octal Buffers and Line Drivers | |
8 | SN54LS245 |
Motorola Inc |
OCTAL BUS TRANSCEIVER | |
9 | SN54LS245 |
Texas Instruments |
Octal Bus Transceivers | |
10 | SN54LS247 |
Motorola Inc |
BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS | |
11 | SN54LS248 |
Motorola Inc |
BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS | |
12 | SN54LS249 |
Motorola Inc |
BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS |