SN74LS641-1N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74LS641-1N is an octal bus transceiver IC with open-collector outputs and bidirectional common direction control. Featuring 8-bit data transfer capability, LS-family TTL logic, and 45pF load capacitance. From $2.08, in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS641-1N Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.0800(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74LS641-1N?
- Octal (8-bit) bidirectional bus transceiver with common direction control
- Open-collector outputs enable wired-AND configurations and mixed-voltage interfacing
- LS TTL family with 24mA output sink current for robust bus driving
- 20-pin DIP package (PDIP-T20) for easy through-hole PCB integration
- Supports 45pF load capacitance ensuring signal integrity in high-capacitance bus environments
What is SN74LS641-1N used for?
The SN74LS641-1N is widely used in microprocessor-based systems for bidirectional data bus buffering and isolation between subsystems. It is ideal for memory bus expansion, I/O port interfacing, and backplane data transfer in industrial control and embedded computing designs. The open-collector outputs also make it suitable for multi-master bus architectures requiring wired-AND logic.
What are the specifications of SN74LS641-1N?
| YTEOL | 15 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 45pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | OPEN-COLLECTOR |
| 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) | 95mA |
| Prop. Delay@Nom-Sup | 25ns |
| Propagation Delay (tpd) | 25ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| 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 SN74LS641-1N datasheet?
SN74LS641-1N Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS641-1N?
Compatible alternatives and drop-in replacements for SN74LS641-1N:
Frequently Asked Questions
What is the output configuration of the SN74LS641-1N and why does it matter?
The SN74LS641-1N uses open-collector outputs, which allow the outputs to be wire-ANDed together for shared bus configurations. This is especially useful in multi-master bus systems where multiple devices share a common data line, enabling flexible interfacing without bus contention.
What are the key electrical specifications of the SN74LS641-1N?
The SN74LS641-1N features a maximum output sink current (I(ol)) of 24mA, a load capacitance of 45pF, and operates within the standard LS TTL voltage range (4.75V to 5.25V). It has 8 bidirectional channels with a common direction control input for simultaneous switching.
What applications is the SN74LS641-1N best suited for?
This IC is ideal for microprocessor data bus buffering, memory interface expansion, and backplane communication in industrial and embedded systems. Its bidirectional design and open-collector outputs make it suitable for any application requiring reliable 8-bit data transfer between subsystems.
What is the package type and how does it affect PCB design?
The SN74LS641-1N comes in a 20-pin Dual-In-Line Package (PDIP), which is a through-hole format ideal for prototyping and applications where soldering reliability is critical. The DIP package simplifies manual assembly and allows use in standard IC sockets for easy replacement.
Are there compatible alternatives or replacements for the SN74LS641-1N?
Compatible alternatives include other octal bus transceivers in the LS or HC logic family, such as the SN74LS640-1N (inverting version) or 74HCT641 from other manufacturers. When substituting, verify supply voltage compatibility, output type (open-collector vs. totem-pole), and timing parameters to ensure drop-in compatibility.
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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+ | $3.6300 | $3.63 |
| 4+ | $3.0250 | $12.10 |
| 100+ | $2.8400 | $284.00 |
| 260+ | $2.6500 | $689.00 |
| 500+ | $2.2100 | $1105.00 |
| 1000+ | $2.0800 | $2080.00 |
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