CD54HC245F Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
Texas Instruments CD54HC245F is an 8-bit bidirectional bus transceiver with direction control in a 20-pin ceramic DIP package. It operates in the HC/UH family with 50 pF load capacitance rating and 3-state outputs for bus isolation. Available from stock worldwide for bus interface and level translation designs.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD54HC245F Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $20.2300(MOQ 7)
- 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 CD54HC245F?
- 8-bit bidirectional data bus transceiver with direction pin and output-enable control for full bus master/slave arbitration in 8-bit parallel data paths
- HC-family CMOS logic with 50 pF load capacitance tolerance and 3-state outputs enabling safe bus sharing among multiple devices
- 20-pin ceramic DIP package with wide temperature range suitability for military-grade and extended-industrial bus interface applications
What is CD54HC245F used for?
CD54HC245F is used as a bidirectional data bus buffer and level translator between microcontrollers, memory devices, and peripheral ICs in embedded systems requiring 8-bit parallel data transfer. Its direction control pin simplifies bus turnaround logic in bidirectional SRAM interfaces and CPLD-based data path designs. The ceramic DIP package makes it suitable for high-reliability industrial and military systems where plastic packages are not permissible.
What are the specifications of CD54HC245F?
| 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 |
| 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 CD54HC245F datasheet?
CD54HC245F Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD54HC245F?
Compatible alternatives and drop-in replacements for CD54HC245F:
Bus Transceiver, HC/UH Series, 8-Func, 8-Bit, True Output, CMOS, CDIP20
Frequently Asked Questions
How many data bits does CD54HC245F buffer and how is the transfer direction controlled?
CD54HC245F buffers 8 data bits bidirectionally, with a dedicated DIR pin selecting whether data flows from port A to port B or B to A. A separate output-enable pin tri-states all 8 outputs for bus isolation. This 8-bit architecture with common direction control reduces the gate count needed to implement a full byte-wide bidirectional bus in microprocessor memory interfaces.
What makes CD54HC245F's ceramic DIP package suitable for high-reliability applications?
The ceramic DIP package of CD54HC245F provides hermetic sealing that protects the die from moisture and contaminants, making it suitable for military, aerospace, and extended-industrial applications. Ceramic packages withstand a wider temperature excursion than plastic equivalents and maintain electrical parameters over a -55°C to 125°C range, where standard PDIP or SOIC variants would experience accelerated degradation.
In a memory bus design, how does CD54HC245F's 50 pF load tolerance affect signal integrity?
CD54HC245F is rated for a 50 pF load capacitance per output, which defines the maximum parasitic capacitance it can drive while maintaining HC-family propagation delays typically below 10 ns at 5 V. On a bus with multiple SRAM chips presenting 10–20 pF each, a single CD54HC245F can buffer up to four devices before signal integrity degrades, reducing reflections on 8-bit parallel data lines.
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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.
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| 9+ | $28.4629 | $256.17 |
| 12+ | $25.5185 | $306.22 |
| 20+ | $20.2300 | $404.60 |
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