Overview
The 74HC165DB,112 is an 8-bit serial or parallel-in/serial-out shift register produced by Nexperia USA Inc. This device is part of the 74HC165 and 74HCT165 family, which are widely used in various electronic designs for data conversion and shifting. The 74HC165DB features a serial data input (DS), eight parallel data inputs (D0 to D7), and two complementary serial outputs (Q7 and Q7'). The device supports both asynchronous 8-bit parallel load and synchronous serial input, making it versatile for different application needs.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC supply voltage | 2.0 | 5.0 | 6.0 | V | |
| VI input voltage | 0 - VCC | V | |||
| VO output voltage | 0 - VCC | V | |||
| Tamb ambient temperature | -40 | 125 | °C | ||
| tpd propagation delay | VCC = 2.0 V | 16 | ns | ||
| fmax maximum frequency | VCC = 2.0 V | 56 | MHz | ||
| Input levels | CMOS (74HC165), TTL (74HCT165) | ||||
| ESD protection | HBM | > 2000 V | |||
| ESD protection | CDM | > 1000 V |
Key Features
- Asynchronous 8-bit parallel load
- Synchronous serial input
- Wide supply voltage range from 2.0 to 6.0 V
- CMOS low power dissipation
- High noise immunity
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
- Input levels: CMOS for 74HC165, TTL for 74HCT165
- Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V)
- ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V
- Multiple package options
- Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Applications
- Parallel-to-serial data conversion
- HIGH-to-LOW level shifting applications
- Various electronic designs in automotive, industrial, mobile, and consumer applications
Q & A
- What is the primary function of the 74HC165DB?
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?
The device features a serial data input (DS), eight parallel data inputs (D0 to D7), and two complementary serial outputs (Q7 and Q7').
- What is the supply voltage range for the 74HC165DB?
The supply voltage range is from 2.0 to 6.0 V.
- What are the input levels for the 74HC165 and 74HCT165?
The input levels are CMOS for the 74HC165 and TTL for the 74HCT165.
- What kind of ESD protection does the 74HC165DB offer?
The device offers ESD protection with HBM exceeding 2000 V and CDM exceeding 1000 V.
- What are the operating temperature ranges for the 74HC165DB?
The device is specified from -40 °C to +85 °C and from -40 °C to +125 °C.
- How does the parallel load input (PL) affect the data loading?
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?
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 some common applications of the 74HC165DB?
Common applications include parallel-to-serial data conversion and HIGH-to-LOW level shifting applications.
- Does the 74HC165DB have any special power dissipation characteristics?
Yes, it features CMOS low power dissipation.
