74 Series Logic
A range of classic 74 series logic chips from Silicon ARK
The older hard to find items are tested unused NOS ( New Old Stock ) in perfect condition.
Modern 74's will be NEW Stock and RoHS Compliant.
All varients are listed: 74xxx (original) , 74LSxxx (low power Schottky TTL) , 74HCxxx (high speed CMOS) , 74HTCxxx (HC version with LS TTL compatible inputs),
So as to make one for one replacement selection easier we also list the same chips but by different manufacturers, for complete compatibility.
Power requirements: 74LS: 5V +/- 0.25V , 74HC: 2 to 6V , 74HCT: 5V +/- 0.5V HC and HCT devices are static sensitive.
To search for all the available options for a single device simply key in the basic number inthe top search box i.e 7401 .... 7474 or 74HC01, 74HC74 or 74LS01, 74LS74 .....
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-25 %
Brand: Texas Instruments
Model: 74LS640 (SN74LS640-1N) Octal bus transceiver - Texas Instruments
SN74LS640-1N Octal bus transceiver; 3-state,inverting by Texas Instruments. Package: 20-pin DIP Download Texas Instruments SN74LS640-1N datasheet: Status: NOS (New Old Stock) Individually tested components: YES ..
£2.32 £1.75
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-26 %
Brand: Motorola
Model: 74LS641 (SN74LS641N) octal bus transceiver - Motorola
SN74LS641N octal bus transceiver by Motorola. Package: 20-pin DIP Download Motorlola SN74LS641N datasheet: Status: NOS (New Old Stock) Individually tested Components: YES RoHS complia..
£2.10 £1.55
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Brand: Harris Semiconductor
Model: 74HCT643 (CD74HCT643E) Bus-Line Transceiver - Harris
CD74HCT643E Octal Bus-Line Transceiver by Harris Semiconductor. Package: 20-pin DIP Download Harris Semiconductor (Texas Instruments) 74HCT643E .pdf datasheet: Status: NOS ( New Old Stock) ex RS Components in sealed packet with chip carrier. RS..
£1.30
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-35 %
Out Of Stock
Brand: Texas Instruments
Model: 74ALS645 (SN74ALS645A-1N) octal bus transceivers - Texas
SN74ALS645A-1N octal bus transceivers with 3-state outputs by Texas Instruments. Package: 20-pin DIP Download Texas Instruments SN74ALS645A-1N datasheets: Status: NOS (New Old Stock) Indiv..
£2.89 £1.89
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-48 %
Out Of Stock
Brand: Texas Instruments
Model: 74AS646 (SN74AS646NT) Octal Buss Transceiver - Texas Instruments
SN74AS646NT Octal Buss Transceiver with 3-state outputs by Texas Instruments. Package: DIP-24 narrow (300 mil) Download Texas Instruments SN74AS646NT datasheet: Status: NOS (New Old Stock) Individually tested components: YES RoHS ..
£7.73 £4.00
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Brand: IDT Integrated Device Technology
Model: 74FCT646 (IDT74FCT646ATP) OCTAL TRANSCEIVER/ REGISTER - IDT
IDT74FCT646ATP CMOS octal transceiver/ register (3-state) by IDT. Package: 24-pin (narrow 300 mil) DIP Download IDT IDT74FCT646ATP datasheet: Status: NOS (New Old Stock) Individually tested components: YES RoHS..
£4.00
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Brand: IDT Integrated Device Technology
Model: 74FCT646 (IDT74FCT646TP) OCTAL TRANSCEIVER/ REGISTER - IDT
IDT74FCT646TP CMOS octal transceiver/ register (3-state) by IDT. Package: 24-pin (narrow 300 mil ) DIP Download IDT IDT74FCT646TP datasheet: Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no..
£4.00
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Brand: IDT Integrated Device Technology
Model: 74FCT646 (IDT74FCT646TSO) OCTAL TRANSCEIVER/ REGISTER - IDT
IDT74FCT646TSO CMOS octal transceiver/ register (3-state) by IDT. Package: surface mount 24-pin SOIC Download IDT IDT74FCT646TSO datasheet: Status: NOS (New Old Stock) RoHS compliant: no ..
£4.00
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Out Of Stock
Brand: Texas Instruments
Model: 74LS646 (SN74LS646NT) octal bus transceiver - Texas Instruments
SN74LS646NT octal bus transceiver by Texas Instruments. Package: 24-pin (Narrow) DIP Download Texas SN74LS646NT .pdf datasheet: Status: NOS (New Old Stock) Individually tested componnt: YES RoHS compliant: no &n..
£1.25
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Brand: Motorola
Model: 74LS669 (SN74LS669N) Binary up/down counter - Motorola
SN74LS669N Binary up/down counter by Motorola. Package: 16-pin DIP Download Motorola SN74LS669N datasheet :Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no ..
£4.00
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Brand: Texas Instruments
Model: 74LS669 (SN74LS669N) Binary up/down counter - Texas Instruments
SN74LS669N Binary up/down counter by Texas Instruments. Package: 16-pin DIP Download Texas Instruments SN74LS669N datasheet : Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant..
£4.00
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-13 %
Brand: National Semiconductor
Model: 74LS670 (DM74LS670N) 4 x 4 register files - National
DM74LS670N register files by National Semiconductor. Organisation: 4-Word x 4-Bit Speed: 20nS Package: 16-pin DIP Download National Semiconductor DM74LS670N datasheet: Status: NOS (New Old Stock) Individu..
£4.00 £3.50