SN54AHC16374

The SN54AHC16374 devices are 16-bit edge-triggered D-type flip-flops with 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. SN54AHC16374 is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

SN54AHC16374 can be used as two 8-bit flip-flops or one 16-bit flip-flop. On the positive transition of the clock (CLK) input, the Q outputs of the flip-flop take on the logic levels at the data (D) inputs.= A buffered output-enable (OE) input of SN54AHC16374 can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs of SN54AHC16374 neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without need for interface or pullup components.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor SN54AHC16374 is determined by the current-sinking capability of the driver. OE does not affect internal operations of the flip-flop. Old data can be retained or new data of SN54AHC16374 can be entered while the outputs are in the high-impedance state.

The SN54AHC16374 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74AHC16374 is characterized for operation from 40°C to 85°C.