SN74HC645N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74HC645N is an octal bidirectional bus transceiver with 3-state outputs and direction control in the HC/UH logic family, packaged in a 20-Pin DIP for easy breadboard and through-hole assembly. It supports a 150pF load capacitance and provides common control for all 8 channels simultaneously. Available from authorized distributors worldwide with competitive pricing and reliable stock.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC645N Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6583(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74HC645N?
- Octal (8-bit) bidirectional bus transceiver with direction control for flexible data bus interfacing between systems or voltage domains
- 3-state outputs allow multiple devices to share a common bus without signal contention in complex digital system designs
- HC/UH CMOS logic family with wide supply voltage range (2V to 6V) and high noise immunity for robust operation
- 20-Pin DIP package enables easy prototyping, breadboard use, and through-hole PCB assembly in lab and production environments
What is SN74HC645N used for?
The SN74HC645N is widely used in microprocessor and microcontroller bus interfaces where bidirectional 8-bit data transfer between subsystems is required. It serves as a bus isolator and buffer in industrial control systems, embedded computing boards, and memory expansion circuits. The device is also popular in data bus multiplexing, level translation between logic families, and hobbyist electronics projects requiring reliable bidirectional signal routing.
What are the specifications of SN74HC645N?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 150pF |
| 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 | PLASTIC/EPOXY |
| 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 | 22ns |
| Propagation Delay (tpd) | 170ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Where can I find the SN74HC645N datasheet?
SN74HC645N Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HC645N?
Compatible alternatives and drop-in replacements for SN74HC645N:
suggested
suggested
Frequently Asked Questions
What is the function of the SN74HC645N?
The SN74HC645N is an octal bidirectional bus transceiver with 3-state outputs, providing buffered and direction-controlled data transfer across 8-bit parallel buses. It uses common control signals to simultaneously manage all 8 channels, simplifying bus interface design.
What logic family does the SN74HC645N belong to?
The SN74HC645N belongs to the HC/UH high-speed CMOS logic family, which operates over a supply voltage range of 2V to 6V, offers high noise immunity, and is compatible with both CMOS and TTL logic level inputs, making it versatile for mixed-logic systems.
What load capacitance can the SN74HC645N drive?
The SN74HC645N is rated to drive a load capacitance of up to 150pF per output channel, making it suitable for driving moderate-length PCB traces and typical bus loads encountered in embedded system and industrial control board designs.
What package is the SN74HC645N available in?
The SN74HC645N is available in a 20-Pin Dual-In-Line Package (DIP), which is well-suited for through-hole PCB assembly, prototyping on breadboards, and applications where socketed ICs are preferred for easy replacement and testing.
What are common applications for the SN74HC645N?
Common applications include data bus interfacing between microprocessors and peripherals, memory bus expansion, I/O port isolation, and bidirectional level shifting between different logic families in industrial control, embedded computing, and educational electronics projects.
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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+ | $3.1800 | $3.18 |
| 11+ | $1.9875 | $21.86 |
| 39+ | $1.7490 | $68.21 |
| 198+ | $1.5100 | $298.98 |
| 1000+ | $0.6813 | $681.30 |
| 2500+ | $0.6583 | $1645.75 |
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