Overview
The CD74HC165MT is a high-speed CMOS logic 8-bit parallel-in/serial-out shift register produced by Texas Instruments. This device is part of the CD74HC165 series and is designed for use in a variety of digital logic applications. It features both parallel and serial input capabilities, making it versatile for different system designs. The shift register can operate over a wide temperature range from -55°C to 125°C, ensuring reliability in diverse environmental conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Function | Parallel or Serial to Serial | |
| Logic Type | Shift Register | |
| Mounting Type | Surface Mount | |
| Number of Bits per Element | 8 | |
| Number of Elements | 1 | |
| Operating Temperature | -55°C to 125°C | |
| Output Type | Complementary | |
| Package | 16-SOIC (0.154", 3.90mm Width) | |
| Voltage Range | 2V to 6V (HC Types), 4.5V to 5.5V (HCT Types) | V |
| Supply Current (Max) | 0.08 mA | mA |
| Output Drive (IOL/IOH) (Max) | 5.2/-5.2 mA | mA |
| Junction Temperature | 150°C | °C |
| Storage Temperature | -65°C to 150°C | °C |
Key Features
- Buffered inputs
- Asynchronous parallel load capability
- Complementary serial outputs (QH and Q̄H)
- Fanout capability: up to 10 LSTTL loads for standard outputs and up to 15 LSTTL loads for bus driver outputs
- Wide operating temperature range: -55°C to 125°C
- Balanced propagation delay and transition times
- Significant power reduction compared to LSTTL logic ICs
- HC Types: 2V to 6V operation, high noise immunity
- HCT Types: 4.5V to 5.5V operation, direct LSTTL input logic compatibility
Applications
The CD74HC165MT is suitable for various applications requiring parallel-to-serial data conversion, such as:
- Digital logic circuits
- Data transmission systems
- Microcontroller and microprocessor interfaces
- Industrial control systems
- Aerospace and automotive electronics due to its wide temperature range
Q & A
- What is the primary function of the CD74HC165MT?
The CD74HC165MT is an 8-bit parallel-in/serial-out shift register, allowing for both parallel and serial data input and serial output.
- What are the operating voltage ranges for the HC and HCT types?
The HC types operate from 2V to 6V, while the HCT types operate from 4.5V to 5.5V.
- What is the temperature range for the CD74HC165MT?
The device operates over a temperature range of -55°C to 125°C.
- What is the maximum output drive current for the CD74HC165MT?
The maximum output drive current is 5.2 mA for both source and sink.
- What type of outputs does the CD74HC165MT have?
The device has complementary serial outputs (QH and Q̄H).
- How many LSTTL loads can the standard outputs drive?
The standard outputs can drive up to 10 LSTTL loads.
- What is the fanout capability for bus driver outputs?
The bus driver outputs can drive up to 15 LSTTL loads.
- What is the recommended bypass capacitor for the power supply?
A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass caps to reject different frequencies of noise.
- What are some common applications for the CD74HC165MT?
Common applications include digital logic circuits, data transmission systems, microcontroller and microprocessor interfaces, and industrial control systems.
- Is the CD74HC165MT suitable for use in harsh environmental conditions?
Yes, it is suitable due to its wide operating temperature range from -55°C to 125°C.
