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Technical Specifications
Parameters and characteristics for this part
| Specification | SN74LS640NSR |
|---|---|
| Current - Output High, Low [custom] | 15 mA |
| Current - Output High, Low [custom] | 24 mA |
| Logic Type | Transceiver, Inverting |
| Mounting Type | Surface Mount |
| Number of Bits per Element | 8 |
| Number of Elements | 1 |
| Operating Temperature [Max] | 70 °C |
| Operating Temperature [Min] | 0 °C |
| Output Type | 3-State |
| Package / Case | 20-SOIC |
| Package / Case | 0.209 " |
| Package / Case | 5.3 mm |
| Supplier Device Package | 20-SO |
| Voltage - Supply [Max] | 5.25 V |
| Voltage - Supply [Min] | 4.75 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.53 | |
| 10 | $ 2.27 | |||
| 25 | $ 2.14 | |||
| 100 | $ 1.82 | |||
| 250 | $ 1.71 | |||
| 500 | $ 1.50 | |||
| 1000 | $ 1.24 | |||
| Digi-Reel® | 1 | $ 2.53 | ||
| 10 | $ 2.27 | |||
| 25 | $ 2.14 | |||
| 100 | $ 1.82 | |||
| 250 | $ 1.71 | |||
| 500 | $ 1.50 | |||
| 1000 | $ 1.24 | |||
| Tape & Reel (TR) | 2000 | $ 1.16 | ||
| 6000 | $ 1.11 | |||
| Texas Instruments | LARGE T&R | 1 | $ 2.09 | |
| 100 | $ 1.72 | |||
| 250 | $ 1.24 | |||
| 1000 | $ 0.93 | |||
Description
General part information
SN74LS640 Series
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control (DIR) input. The enable input (G) can be used to disable the device so the buses are effectively isolated.
The -1 versions of the SN74LS640 thru SN74LS642, SN74LS644, and SN74LS645 are identical to the standard versions except that the recommended maximum IOLis increased to 48 milliamperes. There are no -1 versions of the SN54LS640 thru SN54LS642, SN54LS644, and SN54LS645.
The SN54LS640 thru SN54LS642, SN54LS644, and SN54LS645 are characterized for operation over the full military tempearture range of –55°C to 125°C. The SN74LS640 thru SN74LS642, SN74LS644, and SN74LS645 are characterized for operation from 0°C to 70°C.
Documents
Technical documentation and resources
