Overview
The SN74HC595DT is an 8-bit serial-in, parallel-out shift register produced by Texas Instruments. This component is part of the HC family of logic devices, designed for CMOS applications. It features a wide operating voltage range and is suitable for various digital circuit applications. The device includes an 8-bit serial-in shift register that feeds an 8-bit D-type storage register, with parallel 3-state outputs. Separate clocks are provided for both the shift and storage registers, allowing for flexible operation. Although the SN74HC595DT is currently obsolete and not recommended for new designs, it remains a significant component in existing systems and educational contexts.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage (VCC) | 2 to 6 | V |
| High-Level Input Voltage (VIH) | 1.5 (at VCC=2V), 3.15 (at VCC=4.5V), 4.2 (at VCC=6V) | V |
| Low-Level Input Voltage (VIL) | 0.5 (at VCC=2V), 1.35 (at VCC=4.5V), 1.8 (at VCC=6V) | V |
| Input Current | 1 µA (maximum) | A |
| Output Current | ±35 mA per output, ±70 mA total | A |
| Propagation Delay (tpd) | 13 ns (typical) | ns |
| Output Drive | ±6 mA at 5 V | A |
| Power Consumption (ICC) | 80 µA (maximum) | A |
Key Features
- 8-bit serial-in, parallel-out shift register
- Wide operating voltage range of 2 V to 6 V
- High-current 3-state outputs can drive up to 15 LSTTL loads
- Low power consumption: 80-µA (maximum) ICC
- Typical propagation delay (tpd) of 13 ns
- ±6-mA output drive at 5 V
- Low input current: 1 µA (maximum)
- Shift register has direct clear (SRCLR) input
- Separate clocks for shift and storage registers
- Output-enable (OE) input for high-impedance state control
Applications
- Network switches
- Power infrastructure
- LED displays
- Servers
Q & A
- What is the SN74HC595DT?
The SN74HC595DT is an 8-bit serial-in, parallel-out shift register produced by Texas Instruments.
- What is the operating voltage range of the SN74HC595DT?
The operating voltage range is from 2 V to 6 V.
- How many LSTTL loads can the outputs of the SN74HC595DT drive?
The high-current 3-state outputs can drive up to 15 LSTTL loads.
- What is the typical propagation delay (tpd) of the SN74HC595DT?
The typical propagation delay is 13 ns.
- What is the maximum output current per output for the SN74HC595DT?
The maximum output current per output is ±35 mA, with a total of ±70 mA.
- Does the SN74HC595DT have a direct clear input?
- Can the clocks for the shift and storage registers be tied together?
- What happens when the output-enable (OE) input is high?
- Is the SN74HC595DT still in production?
- What are some common applications of the SN74HC595DT?
