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74AC574MTR
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Product Detailed Parameters
- Description：IC FF D-TYPE SNGL 8BIT 20SOP
- Series：74AC
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Standard
- Type：D-Type
- Output Type：Tri-State, Non-Inverted
- Number of Elements：1
- Number of Bits per Element：8
- Clock Frequency：250 MHz
- Max Propagation Delay @ V, Max CL：9.5ns @ 5V, 50pF
- Trigger Type：Positive Edge
- Current - Output High, Low：24mA, 24mA
- Voltage - Supply：2V ~ 6V
- Current - Quiescent (Iq)：4 µA
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：20-SO
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Input Capacitance：4 pF
- Grade：-
- Qualification：-
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Overview
The STMicroelectronics 74AC574MTR is an octal D-type flip-flop featuring positive-edge triggering and three-state outputs. It operates within a supply voltage range of 2V to 6V, supporting a maximum clock frequency of 250 MHz. The device exhibits a typical propagation delay of 9.5ns at 5V with 50pF load and delivers output currents of ±24mA. Static current consumption is 4µA. It is housed in a 20-SOIC package and functions across a temperature range of -55°C to 125°C.
Feature Summary
- Positive-edge triggered octal D-type configuration
- Three-state non-inverting outputs for bus driving
- High-speed CMOS technology for low power operation
Applications
- Parallel-to-serial data conversion circuits
- High-speed buffering and register applications
- Bus interface logic systems
Procurement Notes
This component is officially obsolete and no longer manufactured by STMicroelectronics. Procurement must focus on verified surplus stock or authorized distributors holding remaining inventory. Buyers should validate part authenticity through serial number checks and datasheet cross-referencing. Direct replacement strategies involving equivalent function parts from other manufacturers are recommended for new designs.
Selection Notes
Designers requiring this specific logic family should evaluate alternative sources as the original part is discontinued. Selection criteria must prioritize compatible pinouts and electrical characteristics such as voltage range and drive current. Verify that substitute components match the required operating temperature and package dimensions to ensure seamless integration into existing hardware architectures without redesign.
Part Context
The 74AC574 belongs to the AC series of high-speed CMOS logic devices produced by STMicroelectronics. This series is engineered for performance comparable to TTL while maintaining lower power consumption. The MTR suffix indicates the device is supplied in tape-and-reel packaging suitable for automated surface-mount assembly processes.
Replacement Considerations
Direct substitutes include SN74AC374DWR (Texas Instruments), CD74AC374M96 (Texas Instruments), MC74AC574DWG (onsemi), MC74AC574DWR2G (onsemi), and SN74AC574DWR (Texas Instruments). These alternatives offer similar functionality and may require verification of specific package or speed variations.
