Overview
The SN74LV595APWT is an 8-bit serial-in, parallel-out shift register with 3-state output registers, manufactured by Texas Instruments. This device is part of the LV series, known for its low-voltage operation and high-speed performance. It is designed to operate over a wide voltage range from 2 V to 5.5 V, making it versatile for various applications. The SN74LV595A features a direct clear input, support for mixed-mode voltage operation, and live insertion capability, which includes partial power-down mode and back-drive protection.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5.5 | V | |
| VI Input Voltage | -0.5 | 7 | V | |
| VO Output Voltage | -0.5 | VCC + 0.5 | V | |
| IOH High-Level Output Current | -50 µA | -2 mA | -16 mA | A |
| IOL Low-Level Output Current | 50 µA | 2 mA | 16 mA | A |
| TA Operating Free-Air Temperature | -40 | 125 | °C | |
| tpd Propagation Delay (SRCLK to QA-QH) | 4.3 ns | 7.4 ns | 9.5 ns | ns (at VCC = 5 V) |
| fmax Maximum Clock Frequency | 115 MHz | 170 MHz | MHz (at VCC = 5 V, CL = 15 pF) |
Key Features
- VCC operation from 2 V to 5.5 V
- Maximum propagation delay of 7.1 ns at 5 V
- Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
- Typical VOHV (output VOH undershoot) > 2.3 V at VCC = 3.3 V, TA = 25°C
- Support for mixed-mode voltage operation on all ports
- 8-bit serial-in, parallel-out shift register with direct clear
- Ioff supports live insertion, partial power-down mode, and back-drive protection
- Latch-up performance exceeds 250 mA per JESD 17
Applications
- Output expansion
- LED matrix control
- 7-segment display control
Q & A
- What is the operating voltage range of the SN74LV595APWT?
The SN74LV595APWT operates over a voltage range from 2 V to 5.5 V.
- What is the maximum propagation delay at 5 V?
The maximum propagation delay at 5 V is 7.1 ns.
- What is the typical output ground bounce at VCC = 3.3 V?
The typical output ground bounce (VOLP) is less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- Does the SN74LV595APWT support mixed-mode voltage operation?
- What is the function of the direct clear input?
The direct clear input allows for immediate clearing of the shift register and storage register.
- What are some common applications of the SN74LV595APWT?
- What is the maximum clock frequency at VCC = 5 V and CL = 15 pF?
- Does the SN74LV595APWT support live insertion and partial power-down mode?
- What is the latch-up performance of the SN74LV595APWT?
- What are the available package types for the SN74LV595APWT?
