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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Brand: Harris Semiconductor
Model: 74HCT597 (CD74HCT597E) shift register - Harris
CD74HCT597E 8-bit shift register with input flip-flops by Harris. Package: 16-pin DIP Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no
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£1.00
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New
Brand: Texas Instruments
Model: 74LS597 (SN74LS597N) 8-bit shift register - Texas
SN74LS597N 8-bit serial or parallel-input / serial-output shift register by Texas Instruments.Package: 16-pin DIP Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no ..
£0.65
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-17 %
Brand: Texas Instruments
Model: 74LS606 (SN74LS606N) Octal 2-Input Latches - Texas
SN74LS606N Octal 2-Input Multiplexed Latches by Texas Instruments. Packege: 28-pin (wide) DIP Download Texas SN74LS606N datasheet: Status: NOS (New Old Stock) Individually tested components: YES &nbs..
£6.00 £5.00
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-20 %
Out Of Stock
Brand: Motorola
Model: 74HC640 (MC74HC640) Octal bus transceiver - Motorola
MC74HC640 Octal bus transceiver; 3-state,inverting by Motorola. Package: 20-pin DIP Download Motorola MC74HC640 datasheet: Status: NOS (New Old Stock) ex RS Components. RS Components legacy Stock Number : RS643-562 &..
£1.25 £1.00
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-20 %
Brand: Philips Electronics
Model: 74HC640 (PC74HC640P) Octal bus transceiver - Philips
PC74HC640P Octal bus transceiver; 3-state,inverting by Philips. Package: 20-pin DIP Download Philips 74HC640P datasheet: Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no ..
£1.25 £1.00
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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: SIGNETICS
Model: 74F646 (74F646AN) transceiver - Signetics
74F646AN Octal transceiver by Signetics. Package: 24-pin (narrow) DIP 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 (IDT74FCT646ATP) OCTAL TRANSCEIVER/ REGISTER - IDT
IDT74FCT646ATP CMOS octal transceiver/ register (3-state) by IDT. Package: 24-pin (narrow 300 mil) DIP Download IDT IDT74FCT646ATP .pdf datasheet: Status: NOS (New Old Stock) Individually tested components: YES RoHS compliant: no..
£4.00