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Datasheet Replacement Marking Code
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25LC128
SN74LS64 (53)SN74LS6 (123)SN74LS (904)SN74L (1223)SN74 (4991)SN7 (9)
Hotenda

SN74LS640-1NSR

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SO
Hotenda

SN74LS641-1N

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP
Hotenda

SN74LS641N

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP
Hotenda

SN74LS641-1DW

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS642N

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP
Hotenda

SN74LS645-1NSR

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SO
Hotenda

SN74LS641NSR

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SO
Hotenda

SN74LS642NSR

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SO
Hotenda

SN74LS640N

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS642-1DW

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS640-1N

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS640-1DW

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS640DW

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS645-1DW

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS646DW

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 24-SOIC
Hotenda

SN74LS645DW

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS640DWR

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS645-1DWR

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS645-1N

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS645N

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS642DW

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS642-1N

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP
Hotenda

SN74LS640NSR

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SO
Hotenda

SN74LS645NSR

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SO
Hotenda

SN74LS640-1NE4

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS640NE4

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS645DWG4

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS641-1DWR

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS640-1DWE4

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS645-1NE4

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS645NE4

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-PDIP
Hotenda

SN74LS640-1DWG4

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS640DWG4

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS640DBR

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SSOP
Hotenda

SN74LS645-1DWG4

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 20-SOIC
Hotenda

SN74LS641NE4

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP
Hotenda

SN74LS641-1DWE4

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS641DW

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS641-1DWG4

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS641DWG4

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS642DWG4

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS642NE4

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP
Hotenda

SN74LS646NT

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 24-PDIP
Hotenda

SN74LS648NT

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 24-PDIP
Hotenda

SN74LS641DWR

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS641DWRE4

Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC
Hotenda

SN74LS646DWR

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 24-SOIC
Hotenda

SN74LS646DWRE4

Transceiver, Non-Inverting 1 Element 8 Bit per Element Push-Pull Output 24-SOIC
Hotenda

SN74LS648DW

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 24-SOIC
Hotenda

SN74LS648DWE4

Transceiver, Inverting 1 Element 8 Bit per Element Push-Pull Output 24-SOIC
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