Texas Instruments SN74ABT574ADBR

Flip Flop D-Type Bus Interface Pos-Edge 3-ST 1-Element 20-Pin SSOP T/R

Cut Tape (CT) 74ABT574 e4 74ABT flip flop 7.2mm 6.6ns @ 5V 50pF 200MHz 6.6ns

Flip-Flop Logic IC; Logic Family:ABT; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Package/Case:20-SSOP; No. of Pins:20; Operating Temperature Range:-40°C to +85°C; Input Type:TTL; Leaded Process Compatible:Yes ;RoHS Compliant: Yes

These 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops of the SN54ABT574 and SN74ABT574A 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 set up at the data (D) inputs. A buffered output-enable (OE)\ input 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 neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. OE\ 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. 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 is determined by the current-sinking capability of the driver. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.