Overview
The SN74HC590ADR, produced by Texas Instruments, is an 8-bit binary counter with an 8-bit storage register. This device is part of the HC series, known for its high-speed CMOS logic. It operates within a voltage range of 2 to 6 volts, making it versatile for various applications. The counter and storage register have separate clocks, allowing for independent control. The device also features a ripple-carry output (RCO) for easy cascading and expansion of the counter stages.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5 | 6 | V | |
| VIH High-Level Input Voltage | 1.5 (VCC=2V) | 3.15 (VCC=4.5V) | 4.2 (VCC=6V) | V | |
| VIL Low-Level Input Voltage | 0.5 (VCC=2V) | 1.35 (VCC=4.5V) | 1.8 (VCC=6V) | V | |
| ICC Power Consumption | 8 | 80 | 160 | µA | VCC = 6V, VI = VCC or GND, IO = 0 |
| fmax Clock Frequency | 4 (VCC=2V) | 20 (VCC=4.5V) | 24 (VCC=6V) | MHz | |
| tpd Propagation Delay | 14 (VCC=5V) | ns | CCLK↑ to RCO | ||
| IOZ Output Drive | ±6 | mA | At VCC = 5V |
Key Features
- 8-Bit Binary Counter and Storage Register: The device includes an 8-bit binary counter that feeds an 8-bit storage register with parallel outputs.
- Separate Clocks: Separate clocks for the binary counter (CCLK) and the storage register (RCLK) allow for independent control.
- Direct Clear and Count-Enable Inputs: The binary counter features direct clear (CCLR) and count-enable (CCKEN) inputs.
- Ripple-Carry Output (RCO): Provides a ripple-carry output for cascading multiple stages.
- High-Current 3-State Outputs: Can drive up to 15 LSTTL loads.
- Low Power Consumption: Maximum ICC of 80 µA at VCC = 6V.
- Wide Operating Voltage Range: Operates from 2 to 6 volts.
- High-Speed Operation: Typical propagation delay of 14 ns at VCC = 5V.
Applications
- Counting and Timing Circuits: Ideal for applications requiring precise counting and timing, such as in digital counters, timers, and sequencers.
- Automotive Systems: Suitable for use in automotive systems due to its wide operating temperature range and robust performance.
- Industrial Control Systems: Used in industrial control systems for counting, timing, and sequencing tasks.
- Consumer Electronics: Found in various consumer electronics requiring digital counting and storage functions.
Q & A
- What is the voltage range for the SN74HC590ADR?
The SN74HC590ADR operates within a voltage range of 2 to 6 volts.
- What are the separate clocks for in the SN74HC590ADR?
The separate clocks are for the binary counter (CCLK) and the storage register (RCLK), allowing for independent control.
- How many LSTTL loads can the outputs drive?
The high-current 3-state outputs can drive up to 15 LSTTL loads.
- What is the maximum power consumption of the SN74HC590ADR?
The maximum power consumption (ICC) is 80 µA at VCC = 6V.
- What is the typical propagation delay of the SN74HC590ADR?
The typical propagation delay is 14 ns at VCC = 5V.
- How does the ripple-carry output (RCO) function?
The RCO provides a ripple-carry output for cascading multiple counter stages.
- What are the direct clear and count-enable inputs used for?
The direct clear (CCLR) and count-enable (CCKEN) inputs are used to clear the counter and enable or disable counting, respectively.
- What is the operating temperature range for the SN74HC590ADR?
The operating temperature range is from -40°C to 85°C.
- Can the clocks be tied together?
Yes, the clocks can be tied together, but this will result in the register being one clock pulse behind the counter.
- What is the input transition time for the SN74HC590ADR?
The input transition time (rise and fall) is 1000 ns at VCC = 2V, 500 ns at VCC = 4.5V, and 400 ns at VCC = 6V.
