CD54HCT240F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The CD54HCT240F3A is an 8-channel inverting tri-state bus driver from Texas Instruments' HCT family in a ceramic 20-pin DIP package, with 50 pF load capacity and dual active-low output enables. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD54HCT240F3A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $15.0000(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD54HCT240F3A?
- 8-channel inverting 3-state buffer/line driver with dual active-low output enables for flexible bus control
- HCT CMOS logic family with TTL-compatible inputs, 50 pF load capacitance, and unidirectional drive
- Ceramic 20-pin CDIP package offering superior reliability for high-temperature and military-grade applications
What is CD54HCT240F3A used for?
The CD54HCT240F3A is designed for driving high-capacitance or heavily loaded data buses in industrial control systems and military-grade electronics. Its ceramic 20-pin DIP package and tri-state outputs make it suitable for backplane bus arbitration, address buffering in memory subsystems, and bidirectional interface isolation where TTL-to-CMOS level conversion is needed. The dual enable inputs support multi-master bus architectures common in ruggedized embedded systems.
What are the specifications of CD54HCT240F3A?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | TWO ACTIVE-LOW OUTPUT ENABLES |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | HCT |
| JESD-30 Code | R-GDIP-T20 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.006A |
| Number of Bits | 4 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 33ns |
| Propagation Delay (tpd) | 33ns |
| Qualification Status | Not Qualified |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the CD54HCT240F3A datasheet?
CD54HCT240F3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD54HCT240F3A?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How do the two active-low output enables on the CD54HCT240F3A support multi-master bus architectures?
The CD54HCT240F3A provides 2 independent active-low output enable pins (OE1 and OE2) that allow selective activation of the 8-channel driver in bus-sharing designs, enabling up to 2 separate controllers to arbitrate access to a shared 8-bit data bus without bus contention.
What load capacitance can the CD54HCT240F3A drive and why does this matter for backplane designs?
The CD54HCT240F3A is rated to drive 50 pF load capacitance per output, which is sufficient for short PCB traces and backplane segments in industrial systems, while maintaining signal integrity at typical HCT switching speeds of 20-30 ns propagation delay at 5 V supply.
When should an engineer choose the CD54HCT240F3A ceramic CDIP package over a plastic SOIC variant?
The ceramic 20-pin CDIP package of the CD54HCT240F3A is preferred in military, aerospace, and high-reliability applications where operating temperatures exceed the commercial range of 0°C to 70°C, typically targeting the -55°C to +125°C military temperature range with enhanced moisture resistance.
How does the HCT logic family used in the CD54HCT240F3A compare to standard HC logic for 5 V system compatibility?
HCT devices like the CD54HCT240F3A accept TTL-compatible input thresholds (VIH = 2 V minimum versus HC's 3.5 V), making them directly compatible with 5 V TTL outputs from older processors without level-shifting circuits, while still delivering full CMOS output swings at 5 V supply.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $23.0800 | $23.08 |
| 100+ | $17.3100 | $1731.00 |
| 1000+ | $15.0000 | $15000.00 |
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