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邏輯和電壓轉換
正反器、鎖存器和暫存器
D 型正反器

SN74AS374

現行

具有 3 態輸出的八路 D 型邊緣觸發正反器

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產品規格表
勘誤表

SN74AS374

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 8 Technology family AS Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Input type Bipolar Output type 3-State Clock frequency (max) (MHz) 100 IOL (max) (mA) 48 IOH (max) (mA) -15 Supply current (max) (µA) 128000 Features Very high speed (tpd 5-10ns) Operating temperature range (°C) 0 to 70 Rating Catalog
Number of channels 8 Technology family AS Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Input type Bipolar Output type 3-State Clock frequency (max) (MHz) 100 IOL (max) (mA) 48 IOH (max) (mA) -15 Supply current (max) (µA) 128000 Features Very high speed (tpd 5-10ns) Operating temperature range (°C) 0 to 70 Rating Catalog
PDIP (N) 20 228.702 mm² 24.33 x 9.4
  • D-Type Flip-Flops in a Single Package With 3-State Bus Driving True Outputs
  • Full Parallel Access for Loading
  • Buffered Control Inputs
  • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs
  • D-Type Flip-Flops in a Single Package With 3-State Bus Driving True Outputs
  • Full Parallel Access for Loading
  • Buffered Control Inputs
  • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs

These octal D-type edge-triggered 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.

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 (OE\) input places 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. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components.

OE\ does not affect internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

The SN54ALS374A and SN54AS374 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS374A and SN74AS374 are characterized for operation from 0°C to 70°C.


These octal D-type edge-triggered 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.

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 (OE\) input places 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. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components.

OE\ does not affect internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

The SN54ALS374A and SN54AS374 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS374A and SN74AS374 are characterized for operation from 0°C to 70°C.


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類型 標題 日期
* Data sheet Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs datasheet (Rev. C) 1999年 11月 3日
* Errata Datasheet Errata for SN74AS374 Device Type 2008年 10月 3日
Application note Power-Up Behavior of Clocked Devices (Rev. B) PDF | HTML 2022年 12月 15日
Selection guide Logic Guide (Rev. AB) 2017年 6月 12日
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 2015年 12月 2日
User guide LOGIC Pocket Data Book (Rev. B) 2007年 1月 16日
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 2004年 7月 8日
Application note TI IBIS File Creation, Validation, and Distribution Processes 2002年 8月 29日
Application note Designing With Logic (Rev. C) 1997年 6月 1日
Application note Advanced Schottky Load Management 1997年 2月 1日
Application note Input and Output Characteristics of Digital Integrated Circuits 1996年 10月 1日
Application note Live Insertion 1996年 10月 1日
Application note Advanced Schottky (ALS and AS) Logic Families 1995年 8月 1日

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