MC74HC Series DIP-16 Logic ICs — Mux, Counter, Shift Register, Flip-Flop, 2–6V (5-Pack)

MC74HC Series DIP-16 Logic ICs — Mux, Counter, Shift Register, Flip-Flop, 2–6V (5-Pack)

This 5-pack covers the MC74HC series of high-speed CMOS logic ICs in DIP-16 through-hole packages, including multiplexers, binary counters, shift registers, D flip-flops, and bus transceivers. All operate from 2–6V, are compatible with 3.3V and 5V logic systems, and are rated from -40°C to +125°C for industrial use. Select your required variant from the dropdown.

Variants Included in This Listing

Part Number	Function	Description
74HC151A	8-to-1 Multiplexer	Selects 1 of 8 data inputs, 3-bit address select
74HC163A	4-Bit Binary Counter	Synchronous, presettable, with carry output
74HC164A	8-Bit Shift Register	Serial-in, parallel-out (SIPO), positive edge clock
74HC174A	Hex D Flip-Flop	6× D-type flip-flop with common clock and reset
74HC194A	4-Bit Bidirectional Shift Register	Parallel load, left/right shift, serial I/O
74HC245A	Octal Bus Transceiver	3-state, bidirectional, direction control pin

Common Specifications (All Variants)

Parameter	Value
Supply Voltage	2–6V
Output Current	±25mA per pin
Operating Temperature	-40°C to +125°C
Package	DIP-16 (through-hole)
Logic Family	HC (High-Speed CMOS)
Quantity	5 pieces

Why Choose MC74HC Series?

• Full HC logic family — covers the most common combinational and sequential logic functions in one series
• 2–6V operation — compatible with 3.3V (ESP32, STM32) and 5V (Arduino) systems
• ±25mA output — directly drives LEDs and logic inputs without buffers
• DIP-16 breadboard-friendly — ideal for digital logic education and prototyping
• -40°C to +125°C — industrial temperature range for demanding environments

Compatible With

• Arduino UNO / Nano / Mega (5V logic)
• ESP32 / STM32 / Raspberry Pi (3.3V logic)
• Standard 2.54mm breadboards and DIP-16 IC sockets
• Pin-compatible with SN74HC series (Texas Instruments) and CD74HC series

Frequently Asked Questions

Q: What is the difference between 74HC and 74HCT logic families?
A: 74HC accepts CMOS-level inputs (VIH ≥ 70% VCC), while 74HCT accepts TTL-level inputs (VIH ≥ 2.0V fixed). Use 74HCT when interfacing with 5V TTL outputs to a 5V HC device. For 3.3V-to-5V level shifting, use a dedicated level shifter instead.

Q: Can I use 74HC245 as a 3.3V to 5V level shifter?
A: Yes, with caveats. Power the 74HC245 at 5V, connect 3.3V signals to the A-side inputs, and read 5V-compatible outputs from the B-side. However, the A-side inputs must not exceed VCC (5V), so ensure 3.3V signals are within spec. A dedicated level shifter (TXS0108, BSS138) is safer for bidirectional use.

Q: How do I use 74HC164 to expand Arduino digital outputs?
A: Connect the serial data (DS) and clock (CP) pins to 2 Arduino digital pins. Shift out 8 bits using shiftOut() to control 8 output pins (Q0–Q7). Chain multiple 74HC164s for more outputs — connect Q7 of the first to DS of the second.

Package Contents

• 5× MC74HC Series Logic IC (DIP-16) — variant as selected

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