Overview
The SN74HC595DR is an 8-bit serial-in, parallel-out shift register produced by Texas Instruments. This device is part of the HC595 series and is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package. It is designed to operate over a wide voltage range of 2 V to 6 V, making it versatile for various applications. The SN74HC595DR features a D-type storage register with parallel 3-state outputs, allowing for efficient data transfer and storage. Separate clocks are provided for both the shift and storage registers, enabling precise control over data shifting and latching.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5 | 6 | V |
| VIH High-Level Input Voltage (VCC = 2 V) | 1.5 | 1.5 | V | |
| VIH High-Level Input Voltage (VCC = 4.5 V) | 3.15 | 3.15 | V | |
| VIH High-Level Input Voltage (VCC = 6 V) | 4.2 | 4.2 | V | |
| VIL Low-Level Input Voltage (VCC = 2 V) | 0.5 | 0.5 | V | |
| VIL Low-Level Input Voltage (VCC = 4.5 V) | 1.35 | 1.35 | V | |
| VIL Low-Level Input Voltage (VCC = 6 V) | 1.8 | 1.8 | V | |
| ICC Power Consumption (Max) | 80 | µA | ||
| tpd Propagation Delay (Typical) | 13 | ns | ||
| Output Drive at 5 V | ±6 | mA | ||
| Input Current (Max) | 1 | µA | ||
| Operating Temperature Range | -40 | 85 | °C |
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 of 13 ns
- ±6-mA output drive at 5 V
- Low input current of 1 µA (maximum)
- Shift register has direct overriding clear (SRCLR) input
- Separate clocks for shift and storage registers
- Output-enable (OE) input to control output state
Applications
- Network switches
- Power infrastructure
- LED displays
- Servers
Q & A
- What is the operating voltage range of the SN74HC595DR?
The operating voltage range is 2 V to 6 V.
- What type of outputs does the SN74HC595DR have?
The device has high-current 3-state outputs.
- How many LSTTL loads can the outputs drive?
The outputs can drive up to 15 LSTTL loads.
- What is the maximum power consumption of the SN74HC595DR?
The maximum power consumption is 80 µA.
- What is the typical propagation delay of the SN74HC595DR?
The typical propagation delay is 13 ns.
- What is the output drive capability at 5 V?
The output drive capability is ±6 mA at 5 V.
- What is the maximum input current of the SN74HC595DR?
The maximum input current is 1 µA.
- Does the SN74HC595DR have a direct clear input?
Yes, the shift register has a direct overriding clear (SRCLR) input.
- Are there separate clocks for the shift and storage registers?
Yes, separate clocks are provided for both the shift and storage registers.
- What is the purpose of the output-enable (OE) input?
The output-enable (OE) input controls the output state, putting the outputs in a high-impedance state when high.
