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.

• Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

• Number of channels (#)
• 2
• Technology Family
• AS
• Supply voltage (Min) (V)
• 4.5
• Supply voltage (Max) (V)
• 5.5
• Input type
• Bipolar
• Output type
• Push-Pull
• Clock Frequency (Max) (MHz)
• 100
• IOL (Max) (mA)
• 20
• IOH (Max) (mA)
• -2
• ICC (Max) (uA)
• 16000
• Features
• Very high speed (tpd 5-10ns)

SN54AS74A的完整型号有：5962-9862701QCA、SN54AS74AJ、SNJ54AS74AJ，以下是这些产品的关键参数及官网采购报价：

5962-9862701QCA，工作温度：-55 to 125，封装：CDIP (J)-14，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-9862701QCA的批量USD价格：11.586（1000+）

SN54AS74AJ，工作温度：-55 to 125，封装：CDIP (J)-14，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SN54AS74AJ的批量USD价格：8.138（1000+）

SNJ54AS74AJ，工作温度：-55 to 125，封装：CDIP (J)-14，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54AS74AJ的批量USD价格：11.586（1000+）