CD74HC165EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The CD74HC165EE4 is an 8-bit parallel-in serial-out shift register from Texas Instruments HC logic family, operating up to 20 MHz and supporting serial-in serial-out operation as well. It accepts 2 V to 6 V supply and is packaged in a 16-pin PDIP for through-hole board assembly. Ideal for expanding parallel I/O through a serial interface.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC165EE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit parallel-load serial-out shift register with additional SISO mode
- HC family wide supply range: 2 V to 6 V covering 3.3 V and 5 V systems
- Maximum operating frequency up to 20 MHz for moderate-speed serial I/O expansion
- 16-pin PDIP package for through-hole and socket-based prototyping and production
- RoHS compliant with JESD-609 e4 lead-free designation
Applications
The CD74HC165EE4 is used for serial I/O expansion in microcontroller designs where additional digital inputs are needed beyond the MCU's available GPIO. It is common in SPI-based sensor readout chains, keyboard matrix scanners, and industrial panel I/O modules where multiple parallel bit-wide signals are serialized for transfer to a host processor over a minimal-pin serial interface.
Specifications
| YTEOL | 0 |
| Additional Feature | SISO OPERATION ALSO AVAILABLE |
| Count Direction | RIGHT |
| Family | HC |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | PARALLEL IN SERIAL OUT |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.0052A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 32ns |
| Propagation Delay (tpd) | 250ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 24MHz |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia, Mexico |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the CD74HC165EE4 used for?
The CD74HC165EE4 is an 8-bit parallel-input serial-output (PISO) shift register used to serialize parallel data for transmission over a SPI or similar serial interface. It is commonly used to expand the number of digital inputs available to a microcontroller, enabling reading of 8 or more switches, sensors, or logic signals using only 3 MCU pins.
What is the maximum operating frequency of the CD74HC165EE4?
The device supports clock frequencies up to 20 MHz at a 50 pF load capacitance, which is adequate for most microcontroller SPI interfaces and general-purpose serial I/O expansion. At 20 MHz, all 8 bits can be shifted out in under 400 ns, enabling fast sampling of parallel inputs in data acquisition and control applications.
Does the CD74HC165EE4 support cascading for more than 8 inputs?
Yes. Multiple CD74HC165EE4 devices can be cascaded by connecting the serial output (Q(H)) of one device to the serial input (DS) of the next, while sharing the same clock and load signals. This allows 16, 24, or more parallel inputs to be read serially using the same three MCU interface pins, scaling easily for larger I/O expansion needs.
What package and supply voltage does the CD74HC165EE4 use?
The CD74HC165EE4 uses a 16-pin PDIP (Plastic Dual In-Line Package) through-hole format, compatible with breadboards and socket connectors for prototyping and production use. It operates over a supply voltage range of 2 V to 6 V, covering both 3.3 V and 5 V digital system rails.
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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.
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