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Product Detailed Parameters
- Description：TSSOP 20 BODY 4.4 PITCH 0.65
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Set(Preset) and Reset
- Type：D-Type
- Output Type：Complementary
- Number of Elements：2
- Number of Bits per Element：1
- Clock Frequency：-
- Max Propagation Delay @ V, Max CL：9ns @ 4.5V, 50pF
- Trigger Type：Positive Edge
- Current - Output High, Low：24mA, 24mA
- Voltage - Supply：2V ~ 6V
- Current - Quiescent (Iq)：40 µA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：20-TSSOP
- Package / Case：20-TSSOP (0.173", 4.40mm Width)
- Input Capacitance：10 pF
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LEOAC74PT-D is a radiation-hardened, plastic-encapsulated CMOS dual D-type positive edge-triggered flip-flop developed by STMicroelectronics. Designed for aerospace environments, it operates from a 1.65 V to 6 V power supply with a 7 V absolute maximum rating. The component features an 8.5 ns propagation delay and 10 pF input capacitance. It supports surface mount mounting in a 20-TSSOP package (0.173", 4.40mm width) and functions within an operating temperature range of -40°C to 125°C (TA).
Feature Summary
- Radiation-hardened design suitable for aerospace applications
- Dual D-type positive edge-triggered flip-flop architecture
- Plastic-encapsulated construction for robustness
Applications
- Aerospace electronic systems
- Spacecraft data processing circuits
- Radiation-tolerant memory storage units
Procurement Notes
Verify the specific part number against official STMicroelectronics documentation to ensure accuracy, as datasheet titles may occasionally contain conflicting descriptions such as octal bus buffers. Confirm that the procurement channel provides genuine components with traceable quality levels. Ensure the received hardware matches the specified 20-TSSOP package dimensions and electrical characteristics defined in the official product datasheet.
Selection Notes
Select this component when radiation hardness is required for space or high-altitude operations. The dual D-type configuration offers efficient logic control within a compact surface-mount footprint. Consider the 1.65 V to 6 V operating range for compatibility with various power domains. The wide temperature range ensures reliability in extreme environmental conditions typical of aerospace missions.
Part Context
This device belongs to STMicroelectronics' portfolio of radiation-hardened integrated circuits designed for non-flight model and flight model aerospace applications. It utilizes CMOS technology to provide low-power operation while maintaining signal integrity under ionizing radiation exposure. The plastic encapsulation distinguishes it from ceramic-packaged alternatives, offering cost-effective solutions for specific orbital requirements.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Users requiring alternative components must consult official manufacturer cross-reference guides or engineering change notices for verified replacements compatible with radiation-hardened specifications.
FAQ
What is the trigger mechanism of the LEOAC74PT-D?
The LEOAC74PT-D utilizes a positive edge-triggered mechanism for its dual D-type flip-flops.
Is the LEOAC74PT-D suitable for standard commercial use?
It is specifically developed for aerospace environments and features radiation-hardening, making it specialized for space applications rather than general commercial electronics.
