Overview
The CD74HC595SM96 is an 8-bit serial-in, parallel-out shift register produced by Texas Instruments. This device is part of the CD74HC595 series and is packaged in a 16-pin SSOP (Shrink Small Outline Package). It integrates an 8-bit serial-in shift register that feeds an 8-bit D-type storage register, with the storage register having parallel 3-state outputs. The device is designed to operate over a wide voltage range of 2 V to 6 V, making it versatile for various applications.
The CD74HC595SM96 features separate clocks for both the shift and storage registers, along with a direct overriding clear (SRCLR) input and a serial output for cascading. This allows for flexible and efficient data transfer and storage.
Key Specifications
| Parameter | Condition | Min | Max | Unit | |
|---|---|---|---|---|---|
| VCC Supply Voltage | - | -0.5 | - | 7 | V |
| Operating Voltage Range | - | 2 | - | 6 | V |
| Input Clamp Current (IIK) | VI < 0 or VI > VCC | -20 | - | 20 | mA |
| Low Power Consumption (ICC) | - | - | - | 80 | µA |
| Typical Propagation Delay (tpd) | - | - | 14 | - | ns |
| Output Drive at 5 V | - | - | ±6 | - | mA |
| Input Current | - | - | - | 1 | µA |
| Clock Frequency (fclock) | VCC = 2 V, 25°C | - | - | 26 | MHz |
| Clock Frequency (fclock) | VCC = 4.5 V, 25°C | - | - | 31 | MHz |
| Clock Frequency (fclock) | VCC = 6 V, 25°C | - | - | 36 | MHz |
Key Features
- 8-Bit Serial-In, Parallel-Out Shift Register: The device contains an 8-bit serial-in shift register that feeds an 8-bit D-type storage register.
- Wide Operating Voltage Range: Operates over a voltage range of 2 V to 6 V.
- High-Current 3-State Outputs: Can drive up to 15 LSTTL loads.
- Low Power Consumption: Maximum ICC of 80 µA.
- Fast Propagation Delay: Typical tpd of 14 ns.
- ±6-mA Output Drive at 5 V: High output drive capability.
- Low Input Current: Maximum input current of 1 µA.
- Direct Clear Input (SRCLR): Allows for immediate clearing of the shift register.
- Separate Clocks for Shift and Storage Registers: Provides flexibility in data transfer and storage.
Applications
- Display Drivers: Suitable for driving LED displays, LCD displays, and other types of display systems.
- Industrial Control Systems: Used in control systems that require serial-to-parallel data conversion.
- Automotive Systems: Can be used in automotive applications where low power consumption and high reliability are crucial.
- Consumer Electronics: Found in various consumer electronics such as audio equipment, home appliances, and more.
- Embedded Systems: Often used in embedded systems that require efficient data transfer and storage.
Q & A
- What is the operating voltage range of the CD74HC595SM96?
The operating voltage range is from 2 V to 6 V.
- What is the maximum power consumption of the CD74HC595SM96?
The maximum power consumption (ICC) is 80 µA.
- How many LSTTL loads can the 3-state outputs drive?
The 3-state outputs can drive up to 15 LSTTL loads.
- What is the typical propagation delay (tpd) of the CD74HC595SM96?
The typical propagation delay is 14 ns.
- Does the CD74HC595SM96 have a direct clear input?
Yes, it has a direct overriding clear (SRCLR) input.
- Can the clocks for the shift and storage registers be connected together?
Yes, the clocks can be tied together, but the shift register will always be one clock pulse ahead of the storage register.
- What is the maximum output drive at 5 V?
The maximum output drive at 5 V is ±6 mA.
- What is the maximum input current?
The maximum input current is 1 µA.
- What types of packages are available for the CD74HC595?
The CD74HC595 is available in PDIP, SOIC-D, SOIC-DW, SO, and SSOP packages.
- How do I ensure proper power supply for the CD74HC595SM96?
Each VCC terminal should have a good bypass capacitor to prevent power disturbance. A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass caps.
