Overview
The SN74LV165A device, produced by Texas Instruments, is a parallel-load, 8-bit shift register designed for operation within a voltage range of 2 V to 5.5 V. This device is particularly useful for applications requiring serial data transfer and storage. When the device is clocked, data is shifted toward the serial output QH, and parallel-in access to each stage is provided by eight individual direct data inputs enabled by a low level at the shift/load (SH/LD) input. The device features a clock-inhibit function and a complemented serial output, QH, making it versatile for various digital circuit designs.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| VCC Operation | 2 V to 5.5 V | Operating voltage range |
| Maximum tpd | 10.5 ns at 5 V | Maximum propagation delay time |
| Operating Temperature Range | -40°C to 125°C | Temperature range for operation |
| Package Type | 16-SOIC (0.154", 3.90mm Width) | Package type and dimensions |
| Mounting Type | Surface Mount | Type of mounting |
| Number of Bits per Element | 8 | Number of bits in the shift register |
| Function | Parallel or Serial to Serial | Functionality of the shift register |
| Output Type | Complementary | Type of output signals |
Key Features
- VCC Operation Range: The device operates within a voltage range of 2 V to 5.5 V, making it versatile for various applications.
- Maximum Propagation Delay: The maximum propagation delay time (tpd) is 10.5 ns at 5 V, ensuring high-speed data transfer.
- Mixed-Mode Voltage Operation: Supports mixed-mode voltage operation on all ports, enhancing compatibility with different voltage levels.
- Partial-Power-Down Mode: The Ioff circuitry supports partial-power-down mode operation, disabling the outputs to prevent damaging current backflow when the device is powered down.
- Latch-Up Performance: Latch-up performance exceeds 250 mA per JESD 17, ensuring robust operation against latch-up conditions.
- Clock-Inhibit Function: Features a clock-inhibit function and a complemented serial output, QH, providing additional control over data shifting.
Applications
The SN74LV165A device is suitable for various applications, including:
- Increasing Microcontroller Inputs: It can be used to increase the number of inputs on a microcontroller by serially loading data and then shifting it out in parallel.
- Digital Circuit Designs: Ideal for digital circuit designs requiring serial-to-parallel or parallel-to-serial data conversion.
- Partial-Power-Down Systems: Useful in systems that require partial-power-down capabilities to conserve power and prevent backflow currents.
Q & A
- What is the operating voltage range of the SN74LV165A device?
The SN74LV165A device operates within a voltage range of 2 V to 5.5 V.
- What is the maximum propagation delay time (tpd) of the SN74LV165A at 5 V?
The maximum propagation delay time (tpd) is 10.5 ns at 5 V.
- What type of package does the SN74LV165A come in?
The device comes in a 16-SOIC (0.154", 3.90mm Width) package.
- Does the SN74LV165A support mixed-mode voltage operation?
Yes, it supports mixed-mode voltage operation on all ports.
- What is the purpose of the Ioff circuitry in the SN74LV165A?
The Ioff circuitry disables the outputs to prevent damaging current backflow when the device is powered down.
- What is the latch-up performance of the SN74LV165A according to JESD 17?
The latch-up performance exceeds 250 mA per JESD 17.
- How does the clock-inhibit function work in the SN74LV165A?
The clock-inhibit function allows clocking to be accomplished by a low-to-high transition of the clock (CLK) input while SH/LD is held high and clock inhibit (CLK INH) is held low. The functions of CLK and CLK INH are interchangeable.
- What is the operating temperature range of the SN74LV165A?
The operating temperature range is -40°C to 125°C.
- Can the SN74LV165A be used to increase the number of inputs on a microcontroller?
Yes, it can be used to increase the number of inputs on a microcontroller by serially loading data and then shifting it out in parallel.
- What type of output does the SN74LV165A provide?
The device provides a complementary serial output, QH.
