SCLS381M August 1997 – March 2015 SN74LV74A
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Electrical Characteristics
- 6.5 Switching Characteristics: VCC = 2.5 V ± 0.2 V
- 6.6 Switching Characteristics: VCC = 3.3 V ± 0.3 V
- 6.7 Switching Characteristics: VCC = 5 V ± 0.5 V
- 6.8 Timing Requirements: VCC = 2.5 V ± 0.2 V
- 6.9 Timing Requirements: VCC = 3.3 V ± 0.3 V
- 6.10 Timing Requirements: VCC = 5 V ± 0.5 V
- 6.11 Noise Characteristics
- 6.12 Operating Characteristics
- 6.13 Typical Characteristics
- 7 Parameter Measurement Information
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
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- RGY|14
- DGV|14
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- NS|14
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9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
9.1 Application Information
The SN74LV74A is a Low drive CMOS device that can be used for a multitude of bus interface type applications where output ringing is a concern. The low drive and slow edge rates will minimize overshoot and undershoot on the outputs. The inputs can accept voltages to 5.5 V at any valid VCC making it Ideal for down translation.
9.2 Typical Application
Figure 5. Typical Application Schematic
9.2.1 Design Requirements
This device uses CMOS technology and has balanced output drive. Take care to avoid bus contention because it can drive currents that would exceed maximum limits. The high drive will also create fast edges into light loads so consider routing and load conditions to prevent ringing.
9.2.2 Detailed Design Procedure
- Recommended input conditions:
- Specified High and low levels. See (VIH and VIL) in Recommended Operating Conditions.
- Inputs are overvoltage tolerant allowing them to go as high as 5.5 V at any valid VCC.
- Recommended output conditions:
- Load currents should not exceed 25 mA per output and 50 mA total for the part.
- Outputs should not be pulled above VCC.
9.2.3 Application Curves
Figure 6. Switching Characteristics Comparison