TI,TI公司,TI代理商
TI(德州仪器)| TI产品型号搜索
专营TI元器件,强大的现货交付能力,解决您的采购难题
全流程提供TI现货供应链服务
当前位置:TI公司 > > TI芯片 >> SN74LS670
SN74LS670技术文档下载:
SN74LS670技术文档产品手册下载
SN74LS670 - 产品图解:
SN74LS670-具有三态输出的 4 x 4 寄存器文件
承诺原装正品
专营TI,真正优化您的供应链
TI产品 - SN74LS670介绍
SN74LS670 - 具有三态输出的 4 x 4 寄存器文件

SN74LS670是TI公司的一款其它锁存器产品,SN74LS670是具有三态输出的 4 x 4 寄存器文件,本页介绍了SN74LS670的产品说明、应用、特性等,并给出了与SN74LS670相关的TI元器件型号供参考。

SN74LS670 - 具有三态输出的 4 x 4 寄存器文件 - 其它锁存器 - 触发器/锁存器/寄存器 - TI公司(Texas Instruments,德州仪器)

产品描述

The SN54LS670 and SN74LS670 MSI 16-bit TTL register files incorporate the equivalent of 98 gates. The register file is organized as 4 words of 4 bits each and separate on-chip decoding is provided for addressing the four word locations to either write-in or retrieve data. This permits simultaneous writing into one location and reading from another word location.

Four data inputs are available which are used to supply the 4-bit word to be stored. Location of the word is determined by the write-address inputs A and B in conjunction with a write-enable signal. Data applied at the inputs should be in its true form. That is, if a high-level signal is desired from the output, a high-level is applied at the data input for that particular bit location. The latch inputs are arranged so that new data will be accepted only if both internal address gate inputs are high. When this condition exists, data at the D input is transferred to the latch output. When the write-enable input, G\W, is high, the data inputs are inhibited and their levels can cause no change in the information stored in the internal latches. When the read-enable input, G\R, is high, the data outputs are inhibited and go into the high-impedance state.

The individual address lines permit direct acquisition of data stored in any four of the latches. Four individual decoding gates are used to complete the address for reading a word. When the read address is made in conjunction with the read-enable signal, the word appears at the four outputs.

This arrangement — data-entry addressing separate from data-read addressing and individual sense line — eliminates recovery times, permits simultaneous reading and writing, and is limited in speed only by the write time (27 nanoseconds typical) and the read time (24 nanoseconds typical). The register file has a nondestructive readout in that data is not lost when addressed.

All inputs except read enable and write enable are buffered to lower the drive requirements to one Series 54LS/74LS standard load, and input-clamping diodes minimize switching transients to simplify system design. High-speed, double-ended AND-OR-INVERT gates are employed for the read-address function and have high-sink-current, three-state outputs. Up to 128 of these outputs may be bus connected for increasing the capacity up to 512 words. Any number of these registers may be paralleled to provide n-bit word length.

The SN54LS670 is characterized for operation over the full military temperature range of -55°C to 125°C; the SN74LS670 is characterized for operation from 0°C to 70°C.

产品特性

  • Separate Read/Write Addressing Permits Simultaneous Reading and Writing
  • Fast Access Times…Typically 20 ns
  • Organized as 4 Words of 4 Bits
  • Expandable to 512 Words of n-Bits
  • For Use as:
    • Scratch-Pad Memory
    • Buffer Storage between Processors
    • Bit Storage in Fast Multiplication Designs
  • 3-State Outputs
  • SN54LS170 and SN74LS170 Are Similar But Have Open-Collector Outputs

下面可能是您感兴趣的TI公司其它锁存器元器件
  • TAS2505 - 具有音频处理功能和单声道耳机放大器的数字输入 D 类扬声器放大器
  • CD54HC192 - 高速 CMOS 逻辑可预设的同步 4 位 BCD 码十进制加/减计数器
  • TPS77815 - 单输出 LDO、750mA、固定电压 (1.5V)、快速瞬态响应、电源良好 (PG) 输出
  • CD74HC4020 - 高速 CMOS 逻辑 14 级二进制计数器
  • MSP430G2132 - MSP430G2x32、MSP430G2x02 混合信号微处理器
  • DAC37J84 - 四通道、16 位、1.6/2.5 GSPS 数模转换器
  • SN75114 - 双路差动线路驱动器
  • LM98725 - 具有 LVDS/CMOS 输出和集成 CCD/CIS 传感器定时发送器的 3 通道 16 位 81 MSPS AFE
  • CD74HC4538-Q1 - 汽车类高速 CMOS 逻辑双路可重触发精密单稳多频振荡器
  • CD74HCT93 - 高速 CMOS 逻辑 4 位二进制纹波计数器
  • 节约时间成本,提高采购效率,TI官网授权代理
    TI公司|TI德州仪器|德州仪器TI公司代理商|TI芯片代理商
    TI公司产品现货专家,订购TI公司产品不限最低起订量,TI产品大陆现货即时发货,香港库存3-5天发货,海外库存7-10天发货
    寻找全球TI代理商现货货源 - TI公司(德州仪器)电子元件在线订购