Overview
The SN74HC688DWRG4 is an 8-bit identity comparator produced by Texas Instruments. This component is part of the SN74HC688 series, which is designed to perform comparisons of two 8-bit binary or BCD words. The device features an output-enable (OE) input that can force the output to a high level, making it versatile for various digital logic applications.
The SN74HC688DWRG4 is packaged in a 20-pin SOIC (Small Outline Integrated Circuit) package, making it suitable for a wide range of electronic systems where space efficiency is crucial.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| 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 | ||
| IOH (Output Current High) | -20 μA, -4 mA, -5.2 mA | mA | ||
| IOL (Output Current Low) | 20 μA, 4 mA, 5.2 mA | mA | ||
| ICC (Quiescent Current) | 8 μA (VCC=6V) | 80 μA (VCC=6V) | 160 μA (VCC=6V) | μA |
| tpd (Propagation Delay Time) | 113 ns (VCC=2V), 30 ns (VCC=4.5V), 24 ns (VCC=6V) | 210 ns (VCC=2V), 42 ns (VCC=4.5V), 36 ns (VCC=6V) | 313 ns (VCC=2V), 63 ns (VCC=4.5V), 53 ns (VCC=6V) | ns |
| TA (Operating Free-Air Temperature) | -40 | 85 | °C |
Key Features
- Wide operating voltage range of 2 V to 6 V
- High-current outputs drive up to 10 LSTTL loads
- Low power consumption, 80-μA max ICC
- Typical propagation delay time (tpd) of 14 ns at VCC = 6 V
- ±4-mA output drive at 5 V
- Low input current of 1 μA max
- Compare two 8-bit binary or BCD words
- Output-enable (OE) input to force output to high level
Applications
The SN74HC688DWRG4 is suitable for a variety of digital logic applications, including:
- Data validation and verification in digital systems
- Binary and BCD code comparisons
- Automated testing and diagnostic equipment
- Embedded systems requiring low power consumption
- Digital signal processing and control systems
Q & A
- What is the primary function of the SN74HC688DWRG4?
The primary function is to compare two 8-bit binary or BCD words and provide an output based on the comparison.
- What is the operating voltage range of the SN74HC688DWRG4?
The operating voltage range is from 2 V to 6 V.
- What is the maximum propagation delay time at VCC = 6 V?
The maximum propagation delay time at VCC = 6 V is 53 ns.
- How much current can the outputs drive?
The outputs can drive up to 10 LSTTL loads.
- What is the typical quiescent current consumption?
The typical quiescent current consumption is 80 μA.
- What is the purpose of the output-enable (OE) input?
The output-enable (OE) input can be used to force the output to a high level.
- What are the available package types for the SN74HC688 series?
The available package types include SOIC, PDIP, TSSOP, LCCC, and CDIP.
- What is the operating temperature range for the SN74HC688DWRG4?
The operating temperature range is from -40°C to 85°C.
- Is the SN74HC688DWRG4 RoHS compliant?
- Where can I find detailed documentation and support resources for the SN74HC688DWRG4?
Detailed documentation and support resources can be found on the Texas Instruments website.
