LEOAC74PT STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
LEOAC74PT is a radiation-hardened, plastic-packaged dual D-type positive edge-triggered flip-flop from STMicroelectronics. It provides complementary Q and Q-bar outputs, 50 pF load capacitance, and 50 mA output current in a 20-pin SOIC package suitable for space-grade digital logic.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LEOAC74PT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LEOAC74PT?
- Radiation-hardened design for space and high-reliability environments
- Dual D-type flip-flops with complementary Q and Q-bar outputs
- 50 pF load capacitance for robust signal integrity
- 50 mA maximum output sink current (I_OL)
- AC-series CMOS logic family for high-speed operation
- 20-pin plastic SOIC package (PDSO-G20)
What is LEOAC74PT used for?
The LEOAC74PT is designed for radiation-hardened digital logic applications in satellites, spacecraft, and aerospace avionics where reliable data latching under ionizing radiation is critical. Its dual flip-flop architecture with complementary outputs simplifies clocked register and state-machine designs in space-qualified systems. Engineers building high-reliability command-and-data-handling boards benefit from its AC-family speed combined with rad-hard process technology.
What are the specifications of LEOAC74PT?
| YTEOL | 5 |
| Family | AC |
| JESD-30 Code | R-PDSO-G20 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | D FLIP-FLOP |
| Max I(ol) | 0.05A |
| Number of Bits | 1 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR, 7 INCH |
| Prop. Delay@Nom-Sup | 12.5ns |
| Propagation Delay (tpd) | 12.5ns |
| Screening Level | AEC-Q100; MIL-STD-883 |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 1.65V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Total Dose | 50k Rad(Si) V |
| Trigger Type | POSITIVE EDGE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Where can I find the LEOAC74PT datasheet?
LEOAC74PT Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for LEOAC74PT?
Compatible alternatives and drop-in replacements for LEOAC74PT:
D Flip-Flop, AC Series, 2-Func, Positive Edge Triggered, 1-Bit, Complementary Output, CMOS, PDSO20
Frequently Asked Questions
How much output sink current can each flip-flop channel in the LEOAC74PT supply?
Each channel of the LEOAC74PT can sink up to 50 mA (I_OL maximum), which is sufficient to directly drive standard CMOS or TTL-level loads without external buffers in most space-grade digital logic boards operating at 3.3 V or 5 V supply rails.
For which radiation-hardened applications is the LEOAC74PT an appropriate flip-flop choice?
The LEOAC74PT suits satellite command-and-data-handling units, launch-vehicle flight computers, and high-energy physics instrumentation. Its rad-hard plastic construction and AC-family switching speed — combined with complementary Q outputs and 50 pF load tolerance — make it a strong fit for clocked registers that must survive ionizing radiation doses in low-Earth orbit.
How many independent flip-flop functions does the LEOAC74PT integrate, and what package delivers them?
The LEOAC74PT integrates 2 independent positive edge-triggered D flip-flops, each with complementary Q and Q-bar outputs, in a 20-pin PDSO-G20 (plastic SOIC) package. The 20-pin count provides ample I/O for dual-channel clocked storage without requiring a larger, heavier package in mass-critical space assemblies.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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