SN74ABT646DBR集成电路（IC）的缓冲器驱动器接收器收发器规格书PDF中文资料

SN74ABT646DBR属于集成电路（IC）的缓冲器驱动器接收器收发器。由美国德州仪器公司制造生产的SN74ABT646DBR缓冲器，驱动器，接收器，收发器逻辑缓冲器、驱动器、接收器和收发器允许隔离对某个电路的逻辑信号的访问，以用于另一电路。缓冲器将其输入信号（不变或反相）传递到其输出，并可能用于清除弱信号或驱动负载。在布尔逻辑仿真器中，缓冲器主要用于增加传播延迟。逻辑接收器和收发器允许在数据总线之间进行隔离通信。

State-of-the-Art EPIC-IIBE BiCMOS Design

Significantly Reduces Power Dissipation

ESD Protection Exceeds 2000 V Per

MIL-STD-883C, Method 3015; Exceeds

200 V Using Machine Model (C = 200 pF,

R = 0)

Latch-Up Performance Exceeds 500 mA

Per JEDEC Standard JESD-17

Typical VOLP (Output Ground Bounce)

< 1 V at VCC = 5 V, TA = 25°C

High-Drive Outputs (–32-mA IOH,

64-mA IOL)

Package Options Include Plastic

Small-Outline (DW), Shrink Small-Outline

(DB), and Thin Shrink Small-Outline (PW)

Packages, Ceramic Chip Carriers (FK), and

Plastic (NT) and Ceramic (JT) DIPs

description

These devices consist of bus transceiver circuits,

D-type flip-flops, and control circuitry arranged for

multiplexed transmission of data directly from the

input bus or from the internal registers. Data on the

A or B bus is clocked into the registers on the

low-to-high transition of the appropriate clock

(CLKAB or CLKBA) input. Figure 1 illustrates the

four fundamental bus-management functions that

can be performed with the 4ABT646.

Output-enable (OE) and direction-control (DIR)

inputs are provided to control the transceiver

functions. In the transceiver mode, data present at

the high-impedance port may be stored in either

register or in both.

The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. The

direction control (DIR) determines which bus will receive data when OE is low. In the isolation mode (OE high),

A data may be stored in one register and/or B data may be stored in the other register.

When an output function is disabled, the input function is still enabled and may be used to store and transmit

data. Only one of the two buses, A or B, may be driven at a time.

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.

The SN74ABT646 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count

and functionality of standard small-outline packages in less than half the printed-circuit-board area.

The SN54ABT646 is characterized for operation over the full military temperature range of –55°C to 125°C. The

SN74ABT646 is characterized for operation from –40°C to 85°C.