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SN74ALS74A

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具有清零和预设功能的双通道正边沿 D 类触发器

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SN74ALS74A

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产品详情

Number of channels 2 Technology family ALS Input type Bipolar Output type Push-Pull Clock frequency (max) (MHz) 70 IOL (max) (mA) 8 IOH (max) (mA) -0.4 Supply current (max) (µA) 4000 Features High speed (tpd 10-50ns) Operating temperature range (°C) 0 to 70 Rating Catalog
Number of channels 2 Technology family ALS Input type Bipolar Output type Push-Pull Clock frequency (max) (MHz) 70 IOL (max) (mA) 8 IOH (max) (mA) -0.4 Supply current (max) (µA) 4000 Features High speed (tpd 10-50ns) Operating temperature range (°C) 0 to 70 Rating Catalog
PDIP (N) 14 181.42 mm² (19.3 mm × 9.4 mm) SOP (NS) 14 79.56 mm² (10.2 mm × 7.8 mm) SOIC (D) 14 51.9 mm² (8.65 mm × 6 mm)
  • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
  • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

These devices contain two independent positive-edge-triggered D-type flip-flops. A low level at the preset () or clear () inputs sets or resets the outputs regardless of the levels of the other inputs. When and are inactive (high), data at the data (D) input meeting the setup-time requirements are transferred to the outputs on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a voltage level and is not directly related to the rise time of CLK. Following the hold-time interval, data at the D input can be changed without affecting the levels at the outputs.

The SN54ALS74A and SN54AS74A are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS74A and SN74AS74A are characterized for operation from 0°C to 70°C.

 

These devices contain two independent positive-edge-triggered D-type flip-flops. A low level at the preset () or clear () inputs sets or resets the outputs regardless of the levels of the other inputs. When and are inactive (high), data at the data (D) input meeting the setup-time requirements are transferred to the outputs on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a voltage level and is not directly related to the rise time of CLK. Following the hold-time interval, data at the D input can be changed without affecting the levels at the outputs.

The SN54ALS74A and SN54AS74A are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS74A and SN74AS74A are characterized for operation from 0°C to 70°C.

 
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* 数据表 Dual Positive-Edge-Triggered D-Type Flip-Flops With Clear And Preset 数据表 (Rev. C) 1995-8-1

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