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

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

• Typical Propagation Delay (A to B, B to A) of 7ns at V_CC = 5V, C_L = 15pF, T_A = 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: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5V
• HCT Types
  • 4.5V to 5.5V Operation
  • Direct LSTTL Input Logic Compatibility, V_IL = 0.8V (Max), V_IH = 2V (Min)
  • CMOS Input Compatibility, I_l 1µA at V_OL, V_OH

Data sheet acquired from Harris Semiconductor