Overview
The SN74HC688PWR, produced by Texas Instruments, is an 8-bit identity comparator integrated circuit. This device is designed to compare two 8-bit binary or BCD words and provide an output based on the comparison result. It features an output-enable (OE) input that can force the output to a high level when necessary. The SN74HC688PWR is part of the HC688 series, known for its wide operating voltage range and low power consumption, making it suitable for various digital logic applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2 | 5 | 6 | V |
| VIH (High-Level Input Voltage) at VCC = 2 V | 1.5 | 1.5 | 1.5 | V |
| VIH (High-Level Input Voltage) at VCC = 4.5 V | 3.15 | 3.15 | 3.15 | V |
| VIH (High-Level Input Voltage) at VCC = 6 V | 4.2 | 4.2 | 4.2 | V |
| VIL (Low-Level Input Voltage) at VCC = 2 V | 0.5 | 0.5 | 0.5 | V |
| VIL (Low-Level Input Voltage) at VCC = 4.5 V | 1.35 | 1.35 | 1.35 | V |
| VIL (Low-Level Input Voltage) at VCC = 6 V | 1.8 | 1.8 | 1.8 | V |
| IOH (Output Current) at VCC = 4.5 V, IOH = -4 mA | 3.98 | 4.3 | 3.7 | V |
| IOH (Output Current) at VCC = 6 V, IOH = -5.2 mA | 5.48 | 5.8 | 5.2 | V |
| IOL (Output Current) at VCC = 4.5 V, IOL = 4 mA | 0.17 | 0.26 | 0.4 | V |
| IOL (Output Current) at VCC = 6 V, IOL = 5.2 mA | 0.15 | 0.26 | 0.4 | V |
| tpd (Propagation Delay) at VCC = 2 V | 113 | 210 | 313 | ns |
| tpd (Propagation Delay) at VCC = 4.5 V | 30 | 42 | 63 | ns |
| tpd (Propagation Delay) at VCC = 6 V | 24 | 36 | 53 | ns |
| TJ (Junction Temperature) | - | - | 150 | ℃ |
| Tstg (Storage Temperature Range) | -65 | - | 150 | ℃ |
Key Features
- Wide Operating Voltage Range: The SN74HC688PWR operates over a voltage range of 2 V to 6 V, making it versatile for various applications.
- High-Current Outputs: Capable of driving up to 10 LSTTL loads, ensuring robust output performance.
- Low Power Consumption: Maximum ICC of 80 μA, contributing to energy-efficient operation.
- Fast Switching Times: Typical propagation delay of 14 ns at 5 V, facilitating high-speed comparisons.
- Output Drive Capability: ±4-mA output drive at 5 V, ensuring strong output signals.
- Low Input Current: Maximum input current of 1 μA, reducing the load on input sources.
- 8-Bit Comparison: Compares two 8-bit binary or BCD words, making it suitable for digital logic circuits.
- Output Enable (OE) Input: Allows the output to be forced to a high level when necessary.
Applications
- Digital Logic Circuits: Ideal for applications requiring the comparison of binary or BCD data.
- Microprocessor Systems: Can be used in microprocessor-based systems for data validation and comparison.
- Embedded Systems: Suitable for embedded systems where low power consumption and high-speed comparisons are critical.
- Automotive and Industrial Control Systems: Used in control systems where reliable and fast data comparison is necessary.
Q & A
- What is the primary function of the SN74HC688PWR?
The primary function is to compare two 8-bit binary or BCD words and provide an output based on the comparison result.
- What is the operating voltage range of the SN74HC688PWR?
The operating voltage range is from 2 V to 6 V.
- How many LSTTL loads can the SN74HC688PWR drive?
It can drive up to 10 LSTTL loads.
- What is the maximum power consumption of the SN74HC688PWR?
The maximum ICC is 80 μA.
- What is the typical propagation delay of the SN74HC688PWR at 5 V?
The typical propagation delay is 14 ns.
- What is the output drive capability of the SN74HC688PWR at 5 V?
The output drive capability is ±4 mA at 5 V.
- What is the maximum input current of the SN74HC688PWR?
The maximum input current is 1 μA.
- Can the output of the SN74HC688PWR be forced to a high level?
Yes, using the output-enable (OE) input.
- What are the typical applications of the SN74HC688PWR?
It is used in digital logic circuits, microprocessor systems, embedded systems, and automotive and industrial control systems.
- What are the available package types for the SN74HC688PWR?
The available package types include SOIC (DW), PDIP (N), TSSOP (PW), CDIP (J), and LCCC (FK).
