Features
• Dual D-type positive edge-triggered flip-flop
• 6 V max. operating
• 7 V max. rating
• 8.5 ns propagation delay
• Nickel/Palladium/Gold-lead-finished (NiPdAu), whisker-free
• Gold-wires
• RML <1% and CVCM <0.1% guaranteed outgassing
• 50 krad (Si) Total Ionizing Dose
• SEL-free up to 62.5 MeV.cm²/mg
• Mass: 80 mg
• Compliant with ST-LEO-specification

Description
The LEOAC74 is a CMOS Dual D-type positive edge-triggered flip-flop for use in
aerospace environments. It operates from 2 V to 6 V power supply (7 V absolute
maximum rating).
The LEOAC74 can operate over a large temperature range of -40 °C to +125 °C and
it is housed in plastic TSSOP-20, Thin-Shrink Small Outline Package, 20 leads, using
golden bonding and Nickel/Palladium/Golden-lead-finishing to prevent whiskers.
The LEOAC74 is compliant with ST-LEO-specification, dedicated specification for
space-ready rad-hard plastic products. This AEC-Q100-based specification offers
a specific trade-off between footprint size savings, cost of ownership and quality
assurance together with radiation hardness and large quantity capability.

Applications
• Low earth orbit (LEO) applications