Texas Instruments
德州仪器 (TI) 是一家开发模拟 IC 和嵌入式处理器的全球半导体设计和制造公司。 通过聘用世界上最聪明的人才,TI 创造了塑造技术未来的创新。 今天,TI 正在帮助超过 100,000 家客户改变未来。
查看所有产品从 Texas InstrumentsThese 8-bit registers feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. The high-impedance 3-state and increased high-logic-level drive provide these registers with the capability of being connected directly to and driving the bus lines in a bus-organized system without need for interface or pullup components. These devices are particularly attractive for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
The eight latches of the ’LS373 and ’S373 are transparent D-type latches, meaning that while the enable (C or CLK) input is high, the Q outputs follow the data (D) inputs. When C or CLK is taken low, the output is latched at the level of the data that was set up.
The eight flip-flops of the ’LS374 and ’S374 are edge-triggered D-type flip-flops. On the positive transition of the clock, the Q outputs are set to the logic states that were set up at the D inputs.
Schmitt-trigger buffered inputs at the enable/clock lines of the ’S373 and ’S374 devices simplify system design as ac and dc noise rejection is improved by typically 400 mV due to the input hysteresis. A buffered output-control (OC) 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.
OC\ does not affect the internal operation of the latches or flip-flops. That is, the old data can be retained or new data can be entered, even while the outputs are off.
These 8-bit registers feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. The high-impedance 3-state and increased high-logic-level drive provide these registers with the capability of being connected directly to and driving the bus lines in a bus-organized system without need for interface or pullup components. These devices are particularly attractive for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
The eight latches of the ’LS373 and ’S373 are transparent D-type latches, meaning that while the enable (C or CLK) input is high, the Q outputs follow the data (D) inputs. When C or CLK is taken low, the output is latched at the level of the data that was set up.
The eight flip-flops of the ’LS374 and ’S374 are edge-triggered D-type flip-flops. On the positive transition of the clock, the Q outputs are set to the logic states that were set up at the D inputs.
Schmitt-trigger buffered inputs at the enable/clock lines of the ’S373 and ’S374 devices simplify system design as ac and dc noise rejection is improved by typically 400 mV due to the input hysteresis. A buffered output-control (OC) 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.
OC\ does not affect the internal operation of the latches or flip-flops. That is, the old data can be retained or new data can be entered, even while the outputs are off.
类型 | 描述 | 全选 |
---|---|---|
系列 | 74LS | |
包装 | 管件 | |
产品状态 | 停产 | |
功能 | 标准 | |
类型 | D 型 | |
输出类型 | 三态,非反相 | |
元件数 | 1 | |
每个元件位数 | 8 | |
时钟频率 | 50 MHz | |
不同 V、最大 CL 时最大传播延迟 | 28ns @ 5V,45pF | |
触发器类型 | 正边沿 | |
电流 - 输出高、低 | 2.6mA,24mA | |
电压 - 供电 | 4.75V ~ 5.25V | |
工作温度 | 0°C ~ 70°C(TA) | |
安装类型 | 通孔 | |
供应商器件封装 | 20-PDIP | |
封装/外壳 | 20-DIP(0.300",7.62mm) | |
电流 - 静态 (Iq) | 40 mA |
Texas Instruments
德州仪器 (TI) 是一家开发模拟 IC 和嵌入式处理器的全球半导体设计和制造公司。 通过聘用世界上最聪明的人才,TI 创造了塑造技术未来的创新。 今天,TI 正在帮助超过 100,000 家客户改变未来。
查看所有产品从 Texas InstrumentsIC FF D-TYPE SNGL 8BIT 20DIP
IC FF D-TYPE SNGL 8BIT 20DIP
IC FF D-TYPE SNGL 8BIT 20SO
OCTAL EDGE-TRIGGERED D-TYPE FLIP
IC FF D-TYPE SNGL 8BIT 20DIP
IC FF D-TYPE SNGL 6BIT 16TSSOP
SN74AS574 OCTAL D-TYPE EDGE-TRIG
SN54HC174 HEX D-TYPE FLIP-FLOPS
SN54LS298 QUADRUPLE 2-INPUT MULT
SN54ALS74A DUAL POSITIVE-EDGE-TR