SN74LS283NSR集成电路（IC）的专用逻辑器件规格书PDF中文资料

SN74LS283NSR属于集成电路（IC）的专用逻辑器件。由美国德州仪器公司制造生产的SN74LS283NSR专用逻辑器件专用逻辑 IC 设计提供应用特定的逻辑输出类型，例如 BCD 速率倍增、可寻址扫描端口、总线终端阵列、CML 驱动器、比较器、ABT 扫描测试、二进制全加法器、互补对加逆变器、可配置缓冲器、触点颤动消除器、晶体振荡器、延迟元件、差分接收器、LVTTL 到 GTLP 收发器、存储器解码器、电源良好检测器和分频器。

Full-Carry Look-Ahead Across the Four

Bits

Systems Achieve Partial Look-Ahead

Performance with the Economy of Ripple

Carry

Supply Voltage and Ground on Corner

Pins to Simplify P-C Board Layout

description

The *283 and 'LS283 adders are electrically and

functionally identical to the ‘B3A and 'LSB3A.

respectively; only the arrangement of the terminals

has been changed. The ‘S283 high performance

Versions are also functionally identical.

These improved full adders perform the addition of

two 4-bit binary words. The sum (Z) outputs are

provided for each bit and the resultant carry (C4) is

obtained from the fourth bit. These adders feature

full internal look-ahead across all four bits generating

the carry term in ten nanoseconds, typically, for the

283 and ‘LS283, and 7.5 nanoseconds for the ‘S283.

This capability provides the system designer with

partial look-ahead performance at the economy and

reduced package count of a ripple-carry

implementation.

The adder logic, including the carry, is implemented

in its true form. End around carry can be accomplish-

ed without the need for logic or level inversion.

Series 54, Series 54LS, and Series 54S circuits are

characterized for operation over the full temperature

range of 55°C to 125°C. Series 74, Series 74LS, and

Series 74S circuits are characterized for 0°C 10 70°C

operation.