Logic ICs: Gates, Buffers & Signal Switching
Logic ICs are low-cost line-stoppers: a missing 20-cent gate halts a 20,000-dollar assembly run. We stock 8,800+ logic part numbers across 74-series families (HC, AHC, LVC, LV), CD4000 CMOS, gates, flip-flops, counters, level shifters, analog switches and multiplexers.
TI CD74HC/SN74, Nexperia, onsemi and Toshiba heritage lines are stocked in SOIC, TSSOP, SSOP and legacy PDIP, with both tube and tape-and-reel packing.
Families and functions
Standard CMOS logic (74HC/HCT, 74AHC, 74LVC), 4000-series CD40xx/CD45xx, bus transceivers, octal buffers and latches, decoders, counters and shift registers, plus analog multiplexers/demultiplexers such as the HC4051/4052/4053 class.
Legacy PDIP variants — increasingly delisted by franchise — remain in stock for through-hole production and repair markets.
| Function | Typical series | Packages |
|---|---|---|
| Gates / inverters / buffers | 74HC00/04/14, 74LVC | SOIC, TSSOP, PDIP |
| Flip-flops / counters / registers | 74HC74/164/595 | SOIC, TSSOP, SSOP |
| Analog switches / mux | CD74HC4051/4052/4066 | SOP, TSSOP, PDIP |
| Level shifters / transceivers | 74LVC, TXB/TXS class | TSSOP, VSSOP, UQFN |
Suffix accuracy, guaranteed
Logic ordering codes encode package, packing and temperature in the suffix. We quote the exact suffix you specify — PW vs PWR, NSR vs NS — so incoming inspection matches your BOM every time.
Mixed logic families on one order? We consolidate 74-series with the rest of your BOM in a single shipment.
Popular logic parts in stock
| Part Number | Manufacturer | Package | Notes |
|---|---|---|---|
| CD74HC4051MDREP | Texas Instruments | PDIP | 8-channel analog mux, through-hole |
| CD74HC4052NSR | Texas Instruments | SOP | Dual 4-channel mux/demux |
| CD74HC4066MDRDL | Texas Instruments | SSOP | Quad bilateral switch |
| CD74HC4046APWR | Texas Instruments | TSSOP | PLL with VCO |
| CD74HC4016PW | Texas Instruments | TSSOP | Quad bilateral switch |
| CD74HC4316PWR | Texas Instruments | TSSOP | Quad analog switch w/ level shift |
Can't find your part number? Search the full catalog — we source beyond listed stock.
Frequently Asked Questions
Do you stock through-hole (PDIP) logic?
Yes — legacy PDIP 74-series and CD4000 parts are stocked for through-hole production and repair.
Can you match exact suffixes?
Yes — package, packing and temperature suffixes are matched character for character.
What brands do you carry?
TI, Nexperia, onsemi, Toshiba heritage and other major 74-series sources.
Is cut tape available?
Yes, from one piece on SMD lines.
How fast is dispatch?
1–3 working days from Hong Kong.
Can logic ship with my larger BOM?
Yes, single-invoice BOM consolidation is standard.
Start an RFQ or upload your BOM — our Hong Kong desk replies within 2 working hours.