SN64BCT374
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH 3-STATE OUTPUTS

SCBS066A - JUNE 1990 - REVISED NOVEMBER 1993

features

• State-of-the-Art BiCMOS Design Significantly Reduces I_CCZ
• ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
• High-Impedance State During Power Up and Power Down
• 3-State True Outputs Drive Bus Lines or Buffer-Memory Address Registers
• Full Parallel Access for Loading
• Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (N)

description

This 8-bit flip-flop features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight flip-flops of the SN64BCT374 are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels that were set up at the data (D) inputs.

A buffered output-enable () input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components.

The output-enable () does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

The outputs are in a high-impedance state during power up and power down when the supply voltage is less than approximately 3 V.

The SN64BCT374 is characterized for operation from -40°C to 85°C and 0°C to 70°C.