SN74HC688PWR

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SN74HC688PWR

IC ID COMPARATOR 8BIT 20-TSSOP

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사양

Series 74HC
Part Status Active
Base Product Number 74HC688
Type Identity Comparator
Number of Bits 8
Output Active Low
Output Function A=B
Voltage - Supply 2V ~ 6V
Current - Output High, Low 5.2mA, 5.2mA
Max Propagation Delay @ V, Max CL 36ns @ 6V, 50pF
Current - Quiescent (Iq) 8 µA
Operating Temperature -40°C ~ 85°C
Package 20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package 20-TSSOP
Mounting Type Surface Mount
Packaging Bulk, Cut Tape (CT), Tape & Reel (TR)

개요

Description

The SN74HC688PWR is a high-speed 4-bit comparator integrated circuit from Texas Instruments, part of the 74HC family, which is known for its high-speed CMOS logic. This device is designed to perform equality comparisons between two 4-bit binary numbers. It features inputs for two 4-bit numbers (A3-A0 and B3-B0) and outputs an equality signal (EQ) that goes high when the two inputs are equal, and low otherwise.
The SN74HC688PWR operates over a wide range of supply voltages (2V to 6V) and offers fast propagation delays, making it suitable for various digital applications, including data processing and control systems. It comes in a 20-pin TSSOP package, which is compact and suitable for space-constrained designs.
Key features include low power consumption, high noise immunity, and compatibility with standard TTL logic levels. The device is ideal for applications requiring reliable and fast comparison of binary values in digital circuits.

Features

The SN74HC688PWR is a high-speed CMOS 4-bit comparator with the following key features:
1. Wide Supply Voltage Range: Operates from 2V to 6V, making it versatile for different applications.
2. High Speed: Offers fast propagation delays, typically around 12 ns at Vcc = 5V.
3. Low Power Consumption: Consumes low quiescent current, suitable for battery-operated devices.
4. 4-Bit Comparison: Compares two 4-bit binary numbers and provides outputs indicating equality and greater/less than conditions.
5. Active Low Outputs: The output indicators for equality (EQ) and the greater (GT) or less (LT) than conditions are active low.
6. Wide Temperature Range: Designed to operate effectively from -40°C to +125°C.
7. Pin-compatible Replacement: Compatible with TTL logic families, allowing for easy integration into existing designs.
These features make the SN74HC688PWR ideal for applications in digital circuits requiring efficient binary comparisons.

Package

The SN74HC688PWR is packaged in a TSSOP (Thin Shrink Small Outline Package) with 28 pins. This surface-mount package is designed for efficient space utilization and is suitable for various electronic applications.

Pinout

The SN74HC688PWR is a 16-pin high-speed CMOS comparator. It features a 4-bit magnitude comparator, which compares two 4-bit binary numbers and determines their relative magnitude. The pin configuration and functions are as follows:
1. A0 - A3 (Pins 1-4): Inputs for the first 4-bit binary number (A).
2. B0 - B3 (Pins 5-8): Inputs for the second 4-bit binary number (B).
3. GND (Pin 9): Ground connection.
4. A=B (Pin 10): Output indicating equality (A equals B).
5. A6. A>B (Pin 12): Output indicating greater than (A greater than B).
7. VCC (Pin 13): Supply voltage.
8. Enable (Pin 14): Active low enable pin.
9. NC (Pins 15, 16): No connect pins, unused in the application.
This device is widely used in digital systems for comparison operations.

Manufacturer

The SN74HC688PWR is manufactured by Texas Instruments (TI), a leading American technology company. Texas Instruments specializes in designing and manufacturing semiconductors and various integrated circuits, including analog, digital, and mixed-signal components. Founded in 1930, the company is known for its innovations in electronics and has a significant presence in multiple markets, including industrial, automotive, communications, and consumer electronics. TI is also well-regarded for its development of calculators and embedded processors, making it a key player in the semiconductor industry.

Application

The SN74HC688PWR is a high-speed CMOS 4-bit priority encoder used in various applications, including digital logic circuits, data processing, encoding systems, and communication systems. It can prioritize multiple inputs to output a binary representation of the highest active input. Common uses include keyboard encoders, switch matrices, and control systems in consumer electronics, automotive, and industrial automation.

Equivalent

The SN74HC688PWR is a 4-bit magnitude comparator. Equivalent products include the 74HC688, 74HCT688, and MC14584. Other compatible devices might be found in different families like the 74LS688 or 74F688, depending on the logic level requirements. Always check specifications for exact pin compatibility and electrical characteristics.

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