CD74HC243 - High Speed CMOS Logic Quad-Bus Transceivers with 3-State Outputs

Updated : 2020-01-09 14:36:10
Description

The ’HC243 and ’HCT243 silicon-gate CMOS three-state bidirectional noninverting buffers are intended for two-way asynchronous communication between data buses. They have high-drive-current outputs that enable high-speed operation when driving large bus capacitances. These circuits possess the low power dissipation of CMOS circuits and have speeds comparable to low-power Schottky TTL circuits. They can drive 15 LSTTL loads.

The states of the output-enable (OEB\, OEA) inputs determine both the direction of flow (A to B, B to A), and the three-state mode.

Products containing the "CD74HC243" keyword are: CD74HC243E , CD74HC243E , CD74HC243EE4 , CD74HC243EE4 , CD74HC243EG4 , CD74HC243M , CD74HC243M , CD74HC243M96 , CD74HC243M96 , CD74HC243M96E4 , CD74HC243M96G4 , CD74HC243M96G4 , CD74HC243ME4 , CD74HC243MG4 , CD74HC243MT , CD74HC243MT , CD74HC243MTE4 , CD74HC243MTG4
Features

  • Typical Propagation Delay (A to B, B to A) of 7ns at VCC = 5V, CL = 15pF, TA = 25°C
  • Three-State Outputs
  • Buffered Inputs
  • Fanout (Over Temperature Range)
    • Standard Outputs . . . 10 LSTTL Loads
    • Bus Driver Outputs . . . . 15 LSTTL Loads
  • Wide Operating Temperature Range . . . –55°C to 125°C
  • Balanced Propagation Delay and Transition Times
  • Significant Power Reduction Compared to LSTTL Logic ICs
  • HC Types
    • 2V to 6V Operation
    • High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
  • HCT Types
    • 4.5V to 5.5V Operation
    • Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
    • CMOS Input Compatibility, Il 1µA at VOL, VOH

Data sheet acquired from Harris Semiconductor