CD54HC245F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
Texas Instruments CD54HC245F3A is a high-speed CMOS octal non-inverting bidirectional bus transceiver with 3-state outputs, operating from -55°C to 125°C in a 20-pin ceramic DIP package. It features direction control and 50 pF load capacitance, ideal for military and harsh-environment bus interfacing. Available from stock worldwide.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD54HC245F3A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $14.5200(MOQ 11)
- 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 CD54HC245F3A?
- Octal bidirectional bus transceiver with 3-state outputs and common direction control for 8-bit parallel bus isolation
- Extended -55°C to 125°C operating temperature range supports military, aerospace, and harsh industrial environments
- HC/UH CMOS family with 50 pF rated load capacitance ensures reliable signal integrity across long bus traces
- 20-pin ceramic DIP package provides rugged hermetic construction for high-reliability and long-life deployments
What is CD54HC245F3A used for?
The CD54HC245F3A is designed for military-grade and industrial bus-buffering applications where data must flow bidirectionally between two 8-bit buses over a wide temperature range of -55°C to 125°C. Its 3-state outputs enable multiple transceivers to share a common bus without contention, making it suitable for VMEbus backplanes, ruggedised SBCs, and avionics data buses. The ceramic DIP package meets hermetic sealing requirements for long-life aerospace and defence systems.
What are the specifications of CD54HC245F3A?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-GDIP-T20 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.0078A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| 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) | 0.16mA |
| Prop. Delay@Nom-Sup | 24ns |
| Propagation Delay (tpd) | 165ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| 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 CD54HC245F3A datasheet?
CD54HC245F3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD54HC245F3A?
Compatible alternatives and drop-in replacements for CD54HC245F3A:
Bus Transceiver, HC/UH Series, 1-Func, 8-Bit, True Output, CMOS, CDIP20
Frequently Asked Questions
Over what temperature range does the CD54HC245F3A operate, and what package provides that ruggedness?
The CD54HC245F3A operates from -55°C to 125°C junction temperature and is housed in a 20-pin ceramic DIP package that offers hermetic sealing. This extended range and ceramic construction make it suitable for military, aerospace, and high-reliability industrial bus applications where commercial plastic packages would fail under thermal cycling stress.
How does the direction control pin of CD54HC245F3A manage data flow on a shared 8-bit bus?
A single DIR pin controls data flow direction for all 8 channels simultaneously, routing signals from the A-bus to B-bus when DIR is high, and from B-bus to A-bus when DIR is low. Asserting the active-low OE pin puts all 8 outputs into high-impedance 3-state mode, allowing multiple CD54HC245F3A devices to share a common backplane bus without signal contention.
What load capacitance rating should a PCB designer account for when using CD54HC245F3A on a long bus trace?
The device is rated for a 50 pF load capacitance per output, which constrains the maximum trace length and fanout on high-speed buses. Designers should keep bus stub lengths below approximately 25 mm at 25 MHz to stay within the 50 pF budget, or add series termination resistors of 22 Ω to 33 Ω to limit ringing on longer traces in VMEbus or custom backplane designs.
When would CD54HC245F3A be preferred over a commercial-temperature 74HC245 in a new design?
CD54HC245F3A is preferred when the operating environment demands temperatures below 0°C or above 85°C, such as outdoor industrial panels, military equipment racks, or avionics chassis. The ceramic DIP package also meets MIL-STD hermetic requirements. For commercial 0°C to 70°C desktop or consumer applications, a plastic-package 74HC245 is a lower-cost equivalent with the same 8-channel 3-state bus transceiver functionality.
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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 |
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| 11+ | $19.0693 | $209.76 |
| 14+ | $18.4337 | $258.07 |
| 19+ | $16.5267 | $314.01 |
| 20+ | $16.1300 | $322.60 |
| 60+ | $14.5200 | $871.20 |
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