Overview
The 74HC166D,652 is an 8-bit parallel-in/serial-out shift register produced by NXP Semiconductors, now part of Nexperia. This device is designed to operate within a wide supply voltage range and is known for its high-speed CMOS logic. It features a serial data input (DS), eight parallel data inputs (D0 to D7), and a serial output (Q7), making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2.0 | 6.0 | V | |
| VIH (HIGH-level input voltage) | 1.5 (VCC = 2.0 V) | 1.2 | 1.5 | V |
| VIL (LOW-level input voltage) | -0.8 (VCC = 2.0 V) | 0.5 | 0.5 | V |
| ICC (Supply current) | 8.0 (VCC = 6.0 V) | μA | ||
| tpd (Propagation delay) | 15 (VCC = 2.0 V) | 30 (VCC = 4.5 V) | 45 (VCC = 4.5 V) | ns |
| fmax (Maximum clock frequency) | 63 | MHz | ||
| Number of bits | 8 | |||
| Package type | SO16 (SOT109-1) | |||
| Operating temperature range | -40 | 125 | °C |
Key Features
- Wide supply voltage range: From 2.0 V to 6.0 V, making it compatible with a variety of power supply systems.
- CMOS low power dissipation: Low power consumption, ideal for energy-efficient designs.
- High noise immunity: Ensures reliable operation in noisy environments.
- Latch-up performance: Exceeds 100 mA per JESD 78 Class II Level B.
- Synchronous parallel-to-serial applications: Supports both parallel and serial data input modes.
- Synchronous serial input for easy expansion: Facilitates easy integration into larger systems.
- Input levels: CMOS level for 74HC166 and TTL level for 74HCT166.
- ESD protection: Complies with JEDEC standards, HBM exceeds 2000 V and CDM exceeds 1000 V.
Applications
The 74HC166D is suitable for a wide range of applications, including:
- Automotive systems: Due to its robustness and wide operating temperature range.
- Industrial control systems: For reliable data processing and transmission.
- Consumer electronics: In devices requiring low power consumption and high noise immunity.
- Computing and networking equipment: For high-speed data transfer and processing.
- Mobile and wearable devices: Where low power consumption and compact packaging are essential.
Q & A
- What is the supply voltage range of the 74HC166D?
The supply voltage range is from 2.0 V to 6.0 V.
- What type of logic does the 74HC166D use?
The 74HC166D uses CMOS logic.
- How many bits does the 74HC166D shift register have?
The 74HC166D is an 8-bit shift register.
- What is the maximum clock frequency of the 74HC166D?
The maximum clock frequency is 63 MHz.
- What is the operating temperature range of the 74HC166D?
The operating temperature range is from -40°C to +125°C.
- Does the 74HC166D have ESD protection?
Yes, it complies with JEDEC standards for ESD protection, exceeding 2000 V for HBM and 1000 V for CDM.
- What package types are available for the 74HC166D?
The 74HC166D is available in SO16 (SOT109-1) package.
- How does the parallel enable input (PE) affect the data loading?
When PE is LOW, data from D0 to D7 is loaded into the shift register on the next LOW-to-HIGH transition of the clock input (CP). When PE is HIGH, data enters the register serially at DS with each LOW-to-HIGH transition of CP.
- What is the effect of the clock enable input (CE) on the shift register?
When CE is LOW, data is shifted on the LOW-to-HIGH transitions of CP. A HIGH on CE disables the CP input.
- Can the 74HC166D be used in noisy environments?
Yes, the 74HC166D has high noise immunity, ensuring reliable operation in noisy environments.
