Overview
The 74HC165DB,118, produced by NXP USA Inc., is an 8-bit serial or parallel-in/serial-out shift register. This device is part of the 74HC series, known for its CMOS technology, which offers low power dissipation and high noise immunity. The 74HC165DB,118 features a serial data input (DS), eight parallel data inputs (D0 to D7), and two complementary serial outputs (Q7 and Q7'). It is designed to handle both asynchronous parallel loading and synchronous serial input, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC supply voltage | 2.0 | 6.0 | V | ||
| VI input voltage | 0 | VCC | V | ||
| VO output voltage | 0 | VCC | V | ||
| Tamb ambient temperature | -40 | +125 | °C | ||
| VIH HIGH-level input voltage | VCC = 6.0 V | 4.2 | 3.2 | 4.2 | V |
| VIL LOW-level input voltage | VCC = 6.0 V | 1.8 | 2.8 | V | |
| tPLH, tPHL propagation delay | VCC = 4.5 V, CL = 50 pF | 16 | 5 | 20 | ns |
| tw pulse width | VCC = 4.5 V | 20 | 8 | 25 | ns |
Key Features
- Asynchronous 8-bit parallel load: Data from D0 to D7 is loaded into the shift register asynchronously when the parallel load input (PL) is LOW.
- Synchronous serial input: Data enters the register serially at DS when PL is HIGH.
- CMOS low power dissipation: The device operates with low power consumption.
- High noise immunity: Ensures reliable operation in noisy environments.
- Input levels: Compatible with CMOS levels for 74HC165 and TTL levels for 74HCT165.
- ESD protection: HBM exceeds 2000 V and CDM exceeds 1000 V.
- Multiple package options: Available in various packages such as DIP, SOIC, TSSOP, and more.
- Wide supply voltage range: Operates from 2.0 to 6.0 V.
- Compliance with JEDEC standards: Meets JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V) standards.
Applications
- Parallel-to-serial data conversion: Ideal for converting parallel data into serial data streams.
- High-to-low level shifting applications: Inputs are overvoltage tolerant to 15 V, making it suitable for level shifting.
- Digital circuit design: Useful in various digital circuits requiring data shifting and conversion.
Q & A
- What is the primary function of the 74HC165DB,118?
The primary function is to act as an 8-bit serial or parallel-in/serial-out shift register.
- What are the input and output configurations of the 74HC165DB,118?
The device has a serial data input (DS), eight parallel data inputs (D0 to D7), and two complementary serial outputs (Q7 and Q7').
- How does the parallel load input (PL) affect the data loading process?
When PL is LOW, data from D0 to D7 is loaded into the shift register asynchronously. When PL is HIGH, data enters the register serially at DS.
- What is the role of the clock enable input (CE) in the 74HC165DB,118?
When CE is LOW, data is shifted on the LOW-to-HIGH transitions of the CP input. A HIGH on CE will disable the CP input.
- What are the operating temperature ranges for the 74HC165DB,118?
The device is specified to operate from -40 °C to +85 °C and from -40 °C to +125 °C.
- What are the ESD protection levels for the 74HC165DB,118?
The device has HBM ESD protection exceeding 2000 V and CDM ESD protection exceeding 1000 V.
- What are the input voltage levels compatible with the 74HC165DB,118?
The device is compatible with CMOS input levels.
- What are some common applications of the 74HC165DB,118?
Common applications include parallel-to-serial data conversion and high-to-low level shifting.
- What is the supply voltage range for the 74HC165DB,118?
The device operates with a supply voltage range from 2.0 to 6.0 V.
- Does the 74HC165DB,118 comply with any industry standards?
Yes, it complies with JEDEC standards JESD8C and JESD7A.
