SN54ABT374中文资料具有三态输出的八路边沿 D 类触发器数据手册TI规格书

描述 Description

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 SN54ABT374 and SN74ABT374A 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 () 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 state and increased drive provide the capability to drive bus lines without need for interface or pullup components. does not affect internal operations of the flip-flop. 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, 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.The SN54ABT374 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABT374A is characterized for operation from -40°C to 85°C.  

特性 Features

·State-of-the-Art EPIC-IIBTM BiCMOS DesignSignificantly Reduces Power Dissipation·Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17·Typical VOLP (Output Ground Bounce) CC = 5 V, TA = 25°C·High-Drive Outputs (-32-mA IOH, 64-mAIOL)·ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015;Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)·Package Options Include Plastic Small-Outline (DW), ShrinkSmall-Outline (DB), and Thin Shrink Small-Outline (PW) Packages,Ceramic Chip Carriers (FK), Plastic (N) and Ceramic (J) DIPs, andCeramic Flat (W) Package  EPIC-IIB is a trademark of Texas Instruments Incorporated.