LEOAC32PT STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
LEOAC32PT is a radiation-hardened plastic quad 2-input OR gate from STMicroelectronics in the AC logic family, offering 24 mA output sink current and 50 pF drive, in a TSSOP-20 package. From $4.50 in stock worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LEOAC32PT 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
Key Features
- 4 independent 2-input OR gate cells in a single TSSOP-20 package
- Radiation-hardened (rad-hard) plastic construction for space and harsh-environment use
- AC CMOS logic family with high-speed operation and low static power
- 24 mA output sink current per gate for driving bus lines and backplane loads
- 50 pF load capacitance rating for stable timing on PCB traces
- Plastic/epoxy package body balances cost and radiation tolerance
Applications
LEOAC32PT is designed for space-qualified and radiation-hardened logic circuits aboard satellites, launch vehicles, and high-altitude platforms where total ionizing dose and single-event upsets are design constraints. Its quad 2-input OR gate architecture supports redundancy voting logic, interrupt combiners, and enable-signal ORing in FPGA or ASIC glue-logic layers. The AC family speed and 24 mA drive strength also make it suitable for high-reliability industrial control systems demanding long-term logic integrity.
Specifications
| YTEOL | 5 |
| Family | AC |
| JESD-30 Code | R-PDSO-G20 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | OR GATE |
| Max I(ol) | 0.024A |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Prop. Delay@Nom-Sup | 12ns |
| Propagation Delay (tpd) | 12ns |
| Schmitt Trigger | NO |
| Screening Level | AEC-Q100 |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| 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 |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LEOAC32PT:
Frequently Asked Questions
What output drive capability does LEOAC32PT provide per gate, and how does 24 mA sink current enable it to drive multiple logic inputs?
Each gate in the LEOAC32PT can sink up to 24 mA, which comfortably drives 6 or more standard CMOS inputs simultaneously given that each CMOS input typically draws under 1 µA. For TTL-compatible loads at 50 pF capacitance, this sink current ensures propagation delay remains within the AC family's specified limits, maintaining signal integrity on PCB traces up to several centimeters long.
In what radiation environments is LEOAC32PT appropriate, and how does its rad-hard plastic packaging compare to ceramic radiation-tolerant devices?
LEOAC32PT is intended for environments with moderate total ionizing dose levels, such as low-Earth orbit satellites and high-altitude scientific instruments, where plastic rad-hard devices provide a cost-effective alternative to full ceramic packaging. While ceramic devices typically withstand higher total doses above 100 krad(Si), rad-hard plastic devices in the TSSOP-20 package offer comparable single-event latch-up immunity at significantly lower unit cost, making them practical for commercial space programs with tighter budgets.
How does using LEOAC32PT as an interrupt-combiner in a redundant processor architecture reduce component count?
A single LEOAC32PT contains 4 independent 2-input OR gates, allowing 4 separate interrupt-OR functions in one TSSOP-20 package rather than 4 discrete single-gate devices. In a dual-redundant processor board each gate can OR the interrupt outputs of two independent sensors, producing a unified interrupt line without additional glue logic. This consolidation reduces the active component count by up to 3 parts and shrinks the logic area to the single 20-pin footprint.
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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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