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74LS640 Series

Octal bus transceivers

Manufacturer: Texas Instruments

Catalog(5 parts)

PartMounting TypeCurrent - Output High, Low▲▼Current - Output High, Low▲▼Output TypePackage / Case▲▼Package / CaseOperating Temperature▲▼Operating Temperature▲▼Logic TypeVoltage - Supply▲▼Voltage - Supply▲▼Number of Elements▲▼Number of Bits per Element▲▼Supplier Device PackageCurrent - Output High, Low▲▼Current - Output High, Low▲▼Package / Case▲▼Package / Case▲▼
Texas Instruments
SN74LS640-1DW
Transceiver, Inverting 1 Element 8 Bit per Element 3-State Output 20-SOIC
Surface Mount
0.014999999664723871 A
0.04800000041723251 A
3-State
0.007493000011891127 m, 0.007499999832361937 m
20-SOIC
70 °C
0 °C
Inverting, Transceiver
4.75 V
5.25 V
1 ul
8 ul
20-SOIC
Texas Instruments
SN74LS640N
Transceiver, Inverting 1 Element 8 Bit per Element 3-State Output 20-PDIP
Through Hole
3-State
20-DIP
70 °C
0 °C
Inverting, Transceiver
4.75 V
5.25 V
1 ul
8 ul
20-PDIP
0.024000000208616257 A
0.014999999664723871 A
0.007619999814778566 m
0.007619999814778566 m
Texas Instruments
SN74LS640-1NSR
Transceiver, Inverting 1 Element 8 Bit per Element 3-State Output 20-SO
Surface Mount
0.014999999664723871 A
0.04800000041723251 A
3-State
0.0052999998442828655 m, 0.005308600142598152 m
20-SOIC
70 °C
0 °C
Inverting, Transceiver
4.75 V
5.25 V
1 ul
8 ul
20-SO
Texas Instruments
SN74LS640DB
Transceiver, Inverting 1 Element 8 Bit per Element 3-State Output 20-SSOP
Surface Mount
3-State
0.0052999998442828655 m, 0.005308600142598152 m
20-SSOP
70 °C
0 °C
Inverting, Transceiver
4.75 V
5.25 V
1 ul
8 ul
20-SSOP
0.024000000208616257 A
0.014999999664723871 A
Texas Instruments
SN74LS640DBR
Transceiver, Inverting 1 Element 8 Bit per Element 3-State Output 20-SSOP
Surface Mount
3-State
0.0052999998442828655 m, 0.005308600142598152 m
20-SSOP
70 °C
0 °C
Inverting, Transceiver
4.75 V
5.25 V
1 ul
8 ul
20-SSOP
0.024000000208616257 A
0.014999999664723871 A

Key Features

• SN74LS64X-1 Versions Rated at IOLof 48 mABi-directional Bus Transceivers in High-Density 20-Pin PackagesHysteresis at Bus Inputs Improves Noise MarginsChoice of True or Inverting LogicChoice of 3-State or Open-collector OutputsSN74LS64X-1 Versions Rated at IOLof 48 mABi-directional Bus Transceivers in High-Density 20-Pin PackagesHysteresis at Bus Inputs Improves Noise MarginsChoice of True or Inverting LogicChoice of 3-State or Open-collector Outputs

Description

AI
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. 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.