Overview
The 74HC165D/S400118, produced by NXP USA Inc. (now part of Nexperia), is an 8-bit parallel-in/serial-out shift register. This device is part of the 74HC and 74HCT family, known for their high-speed CMOS logic. It 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 parallel load and synchronous serial input, making it versatile for various digital circuit applications.
Key Specifications
| Type Number | VCC (V) | Logic Switching Levels | Output Drive Capability (mA) | tpd (ns) | fmax (MHz) | Number of Bits | Power Dissipation Considerations | Tamb (°C) | Package Name |
|---|---|---|---|---|---|---|---|---|---|
| 74HC165D | 2.0 - 6.0 | CMOS | ± 5.2 | 16 | 56 | 8 | Low | -40 to +125 | SO16 (SOT109-1) |
Key Features
- Wide Supply Voltage Range: Operates from 2.0 to 6.0 V.
- CMOS Low Power Dissipation: Low power consumption.
- High Noise Immunity: Ensures reliable operation in noisy environments.
- Latch-up Performance: Exceeds 100 mA per JESD 78 Class II Level B.
- Asynchronous 8-bit Parallel Load: Data can be loaded asynchronously when the parallel load input (PL) is LOW.
- Synchronous Serial Input: Data enters the register serially at DS when PL is HIGH.
- Input Levels: CMOS level for 74HC165 and TTL level for 74HCT165.
- ESD Protection: HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V.
- Multiple Package Options: Available in various packages including SO16 (SOT109-1).
Applications
- Data Conversion: Converts parallel data to serial data, useful in data transmission and storage systems.
- Digital Circuits: Used in various digital circuits requiring serial data output from parallel inputs.
- Level Shifting: Can be used in HIGH-to-LOW level shifting applications due to overvoltage tolerance up to 15 V.
- Embedded Systems: Suitable for use in embedded systems requiring efficient data handling.
Q & A
- What is the primary function of the 74HC165D?
The primary function of the 74HC165D is to convert 8-bit parallel data into serial data.
- What is the supply voltage range for the 74HC165D?
The supply voltage range is from 2.0 to 6.0 V.
- What are the logic switching levels for the 74HC165D?
The logic switching levels are CMOS for the 74HC165 and TTL for the 74HCT165.
- How does the parallel load input (PL) affect the device?
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 maximum clock frequency for the 74HC165D?
The maximum clock frequency is 56 MHz.
- What is the output drive capability of the 74HC165D?
The output drive capability is ± 5.2 mA.
- What is the operating temperature range for the 74HC165D?
The operating temperature range is from -40 °C to +125 °C.
- Does the 74HC165D have ESD protection?
- In what packages is the 74HC165D available?
- What are some common applications of the 74HC165D?
