SN74LS640NE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74LS640NE4 is an octal inverting bus transceiver from Texas Instruments, offering 8-channel bidirectional data transfer with three-state outputs and direction control. It features TTL-compatible logic levels in a 20-pin PDIP package and is ideal for interfacing data buses. Available in stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS640NE4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.8910(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-channel bidirectional inverting bus transceiver with common direction control signal
- Three-state outputs enable direct data bus connection without bus contention
- TTL-compatible LS-family logic with 24mA output sink current for driving capacitive bus loads
- 20-pin PDIP through-hole package with RoHS e4 compliant lead-free construction
Applications
The SN74LS640NE4 is commonly used in microprocessor and microcontroller systems to buffer and interface 8-bit data buses between processors, memory, and I/O peripherals operating at TTL logic levels. Its inverting transceiver architecture with direction control is suited for backplane bus interfaces and address/data multiplexing in embedded and industrial control boards. It also finds use in legacy system repair and designs requiring robust TTL-level bus driving capability in through-hole assembly processes.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| 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 | 15ns |
| Propagation Delay (tpd) | 15ns |
| Qualification Status | Not Qualified |
| 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 |
| 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) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the SN74LS640NE4 and what does it do?
The SN74LS640NE4 is an 8-channel inverting bidirectional bus transceiver from Texas Instruments. It transfers data between two buses in either direction using a direction control pin, with three-state outputs that allow multiple devices to share a common data bus without signal contention.
What package does the SN74LS640NE4 come in?
The SN74LS640NE4 is housed in a 20-pin PDIP (Plastic Dual In-Line Package) through-hole package, which is well suited for prototyping, repair work, and industrial applications where through-hole soldering is preferred over surface-mount assembly.
What is the maximum output sink current of the SN74LS640NE4?
The SN74LS640NE4 has a maximum output low current (IOL) of 24mA per channel, providing sufficient sink capability to drive standard TTL loads and moderate capacitive bus lines in backplane and embedded system designs.
Is the SN74LS640NE4 RoHS compliant?
Yes, the SN74LS640NE4 carries the JESD-609 e4 code indicating it is a lead-free, RoHS-compliant device, making it suitable for use in modern electronics manufacturing environments that require halogen-free and environmentally responsible components.
Can the SN74LS640NE4 replace other octal bus transceiver ICs?
The SN74LS640NE4 is functionally equivalent to the industry-standard 74LS640 octal inverting transceiver and can be used as a drop-in replacement for compatible parts from other LS-family manufacturers, provided the voltage supply and logic level specifications match the application requirements.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.4850 | $1.49 |
| 4+ | $1.2375 | $4.95 |
| 13+ | $0.8910 | $11.58 |
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