Texas Instruments SN74LS640DWR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $1.71 | $1.71 |
| 15+ | $1.66 | $24.90 |
| 25+ | $1.62 | $40.50 |
| 50+ | $1.53 | $76.50 |
| 100+ | $1.35 | $135.00 |
| N+ | $0.27 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | 74LS |
| Packaging | Cut Tape (CT) | Tape & Reel (TR) |
| Part Status | Active |
| Logic Type | Transceiver, Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 15mA, 24mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-SOIC |
| ROHS |  |
The SN74LS640DWR from Texas Instruments is a single-channel inverting transceiver designed for 5V TTL systems. Operating from 4.75V to 5.25V, it provides 15mA source and 24mA sink current, with 3-State outputs for bus-oriented applications. Housed in a 20-SOIC package, it is suitable for industrial controls, data acquisition, and legacy bus interfacing.
- High Sink Current (24mA): Drives heavy TTL loads and long cables effectively.
- 3-State Outputs: Enables safe bus sharing in multi-device systems.
- Inverting Function: Provides design flexibility for polarity matching.
- Proven 74LS Technology: Reliable and widely understood, with extensive documentation.
- Standard 5V Operation: Compatible with existing TTL infrastructure.
Legacy 5V Bus Systems
In existing 5V TTL backplanes, the SN74LS640DWR provides reliable inverting transceiver functionality, allowing data to be transferred with polarity inversion where required by the system architecture.
Motor Control Logic
For industrial motor controllers, this IC buffers and inverts control signals between the logic controller and power driver stages, ensuring correct signal phasing.
Data Acquisition Systems
Use it in DAQ systems to interface analog-to-digital converters with microprocessors. The inverting function can be used to match logic polarity between different ICs.
Peripheral Interface Controllers
In older computer peripherals, this transceiver manages bidirectional data flow on the ISA or similar buses, with 3-State outputs for bus arbitration.
Test Equipment Interfaces
For bench test equipment, the SN74LS640DWR provides a robust interface for driving long cables, with the inverting feature useful for generating complementary signals.
Educational Labs
In digital electronics courses, this IC is ideal for teaching bus communication and 3-State logic concepts due to its simple, well-documented behavior.
- Q: What is the logic family of the SN74LS640DWR?
- A: It belongs to the 74LS (Low-Power Schottky) family, known for its balance of speed and power.
- Q: What is the function of this IC?
- A: It is a single-channel inverting transceiver, used for bidirectional data transfer with inverted outputs.
- Q: What is the output type?
- A: It features 3-State outputs, allowing multiple devices to share a bus safely.
- Q: What is the voltage range?
- A: It operates from 4.75V to 5.25V, standard for 5V TTL systems.
- Q: What is the output current?
- A: It can sink 24mA and source 15mA, providing good drive capability for TTL loads.
- Q: What package is available?
- A: It comes in a 20-SOIC (0.295", 7.50mm Width) package.
SN74LS640DWR.pdf
- Q: What is the logic family of the SN74LS640DWR?
- A: It belongs to the 74LS (Low-Power Schottky) family, known for its balance of speed and power.
- Q: What is the function of this IC?
- A: It is a single-channel inverting transceiver, used for bidirectional data transfer with inverted outputs.
- Q: What is the output type?
- A: It features 3-State outputs, allowing multiple devices to share a bus safely.
- Q: What is the voltage range?
- A: It operates from 4.75V to 5.25V, standard for 5V TTL systems.
- Q: What is the output current?
- A: It can sink 24mA and source 15mA, providing good drive capability for TTL loads.
- Q: What package is available?
- A: It comes in a 20-SOIC (0.295", 7.50mm Width) package.
