SN74HC238N / SN74HC595N / SN74HC173N DIP-16 Logic ICs – Pack of 5

SN74HC238N / SN74HC595N / SN74HC173N DIP-16 Logic ICs — 5-Pack

This listing covers three popular SN74HC series DIP-16 CMOS logic ICs in a 5-pack. Select your required variant from the dropdown. All operate from 2V to 6V with high-speed CMOS performance and TTL-compatible inputs.

Available Variants

Part Number	Function	Description
SN74HC238N	3-to-8 Line Decoder/Demultiplexer	Active-high outputs, enable inputs
SN74HC595N	8-Bit Shift Register with Output Latches	Serial-in, parallel-out, 3-state outputs
SN74HC173N	4-Bit D-Type Register with 3-State Outputs	Parallel load, synchronous clear

Common Specifications

Parameter	Value
Logic Family	74HC CMOS
Package	DIP-16
Supply Voltage	2V – 6V
Propagation Delay	~8ns @ VCC=5V
Output Drive Current	±25mA @ VCC=4.5V
Quantity	5 pieces per variant

Variant Details

• SN74HC238N (3-to-8 Decoder) — Decodes 3-bit binary address (A0–A2) to one of 8 active-high outputs. Two enable inputs (E1 active-low, E2 active-high) for cascading. Ideal for memory chip select, LED matrix row/column driving, and relay bank control.
• SN74HC595N (8-Bit Shift Register) — Serial-in (SER), 8-bit parallel-out with output latch. SPI-compatible (SCK, RCLK, SER). Cascade multiple 595s for unlimited output expansion from 3 Arduino pins. The most popular GPIO expander IC.
• SN74HC173N (4-Bit D Register) — 4-bit parallel-load D-type register with 3-state outputs and synchronous clear. Useful for temporary data storage, pipeline registers, and bus interface buffering.

Why Choose SN74HC Series?

• High-Speed CMOS — ~8ns propagation delay, far faster than 4000-series
• TTL-Compatible Inputs — Direct interface with 5V TTL without level shifting
• ±25mA Output Drive — Directly drives LEDs, bus lines, and logic inputs
• DIP-16 Package — Breadboard-friendly for prototyping and education

Typical Applications by Variant

• 74HC238 — 8-channel relay/LED driver with 3 control pins, memory address decoding
• 74HC595 — Arduino GPIO expansion (drive 8 LEDs with 3 pins), SPI LED matrix driver
• 74HC173 — Data bus latching, pipeline register, temporary storage in digital systems

FAQ

Q: How many 74HC595 can I chain together?
A: Unlimited — connect Q7S (serial output) of one to SER (serial input) of the next. Each additional 595 adds 8 outputs using the same 3 Arduino pins.

Q: What’s the difference between 74HC238 and 74HC138?
A: 74HC238 has active-high outputs; 74HC138 has active-low outputs. Choose based on your load’s active level.

Package Contents

• 5× SN74HC [selected variant] DIP-16 Logic IC

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