CD74HC165EG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HC165EG4 is a high-speed CMOS 8-bit parallel-in/serial-out shift register IC by Texas Instruments. Key specs: 2 V to 6 V supply, 74 MHz max clock frequency, 16-DIP package. From $0.45 in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC165EG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3403(MOQ 1100)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC165EG4?
- 8-bit parallel-load serial-shift register with synchronous parallel input and asynchronous parallel load for flexible data acquisition
- Wide supply voltage range of 2 V to 6 V with CMOS high-speed logic, compatible with TTL voltage levels
- 74 MHz maximum clock frequency enabling rapid serial data transfer across GPIO-limited microcontroller interfaces
- 16-DIP through-hole package (EG4 suffix) with green/RoHS-compliant construction for prototyping and industrial applications
What is CD74HC165EG4 used for?
CD74HC165EG4 is widely used to expand the digital input capacity of microcontrollers and FPGAs by converting 8 parallel button or sensor signals into a serial SPI-compatible data stream. It suits keyboard matrix scanning, industrial DIP-switch reading, and barcode scanner input buffering where minimizing GPIO pin usage is critical. The device also chains multiple units to read 16, 24, or 32 parallel inputs over just 3 microcontroller pins.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the CD74HC165EG4 datasheet?
CD74HC165EG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC165EG4?
Compatible alternatives and drop-in replacements for CD74HC165EG4:
Parallel In Serial Out, HC Series, 8-Bit, Right Direction, Complementary Output, CMOS, PDIP16
Frequently Asked Questions
How many parallel input lines does CD74HC165EG4 support and at what clock frequency?
CD74HC165EG4 supports 8 parallel input lines and clocks serial data out at up to 74 MHz, allowing a full 8-bit word to be shifted out in as little as 108 ns when driven at maximum clock speed.
Can CD74HC165EG4 be cascaded to read more than 8 inputs with a single microcontroller SPI port?
Yes, CD74HC165EG4 devices chain together by connecting the serial output (QH) of one device to the serial data input (DS) of the next. Two devices provide 16 parallel inputs, three give 24 inputs—all readable over 3 microcontroller pins using 16 or 24 clock pulses respectively.
What supply voltage is required for CD74HC165EG4, and does it work with 3.3 V microcontrollers?
CD74HC165EG4 operates from 2 V to 6 V supply, so it runs natively at 3.3 V for ARM Cortex-M or ESP32 microcontrollers as well as at 5 V for AVR or PIC platforms without any level translation required.
In what scenarios is CD74HC165EG4 preferable to a dedicated I2C I/O expander like MCP23008?
CD74HC165EG4 is preferable when latency is critical: at 74 MHz clock, all 8 inputs are sampled in under 200 ns versus the I2C expander's minimum 100 µs read transaction. It also avoids I2C address conflicts when many expanders share one bus.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1100+ | $0.3403 | $374.36 |
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