Overview
The SN74HC688DWRE4 is an 8-bit identity comparator integrated circuit manufactured by Texas Instruments. This device is designed to compare two 8-bit binary or BCD (Binary Coded Decimal) words and output a low signal if the words are identical. Constructed with high-speed CMOS technology, it offers a wide operating voltage range from 2 V to 6 V, making it versatile for various applications, including battery-powered devices and industrial control systems. The SN74HC688DWRE4 is known for its low power consumption, high noise immunity, and high-current outputs, which drive up to 10 LSTTL loads.
Key Specifications
| Parameter | Min | Nom | 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 | ||
| ICC (Quiescent Current) | 80 | μA | ||
| tpd (Propagation Delay) | 24 (VCC=6V) | 36 | 53 | ns |
| IOH (Output Current High) | -5.2 | mA | ||
| IOL (Output Current Low) | 5.2 | mA | ||
| TJ (Junction Temperature) | 150 | ℃ | ||
| Tstg (Storage Temperature Range) | -65 | 150 | ℃ | |
| Operating Temperature Range | -40 | 85 | ℃ |
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 of 14 ns.
- ±4-mA output drive at 5 V.
- Low input current of 1 μA max.
- Compare two 8-bit binary or BCD words.
- Latch-enable (LE) input to retain the output state.
Applications
- Data verification in memory address decoding.
- Data multiplexing.
- Microprocessor-based systems.
- Battery-powered devices.
- Industrial control systems.
Q & A
- What is the primary function of the SN74HC688DWRE4?
The primary function is to compare two 8-bit binary or BCD words and output a low signal if the words are identical.
- What is the operating voltage range of the SN74HC688DWRE4?
The operating voltage range is from 2 V to 6 V.
- What is the maximum propagation delay of the SN74HC688DWRE4 at 6 V?
The maximum propagation delay at 6 V is 53 ns.
- How much current can the outputs drive?
The outputs can drive up to 10 LSTTL loads and have an output drive capability of ±4 mA at 5 V).
- What is the power consumption of the SN74HC688DWRE4?
The maximum quiescent current (ICC) is 80 μA).
- What is the operating temperature range of the SN74HC688DWRE4?
The operating temperature range is from -40°C to 85°C).
- What package types are available for the SN74HC688DWRE4?
The device is available in SOIC (20-pin), PDIP (20-pin), TSSOP (20-pin), CDIP (20-pin), and LCCC (20-pin) packages).
- Does the SN74HC688DWRE4 have a latch-enable feature?
Yes, it has a latch-enable (LE) input to retain the output state).
- What are some common applications of the SN74HC688DWRE4?
Common applications include data verification, memory address decoding, data multiplexing, microprocessor-based systems, battery-powered devices, and industrial control systems).
- Is the SN74HC688DWRE4 RoHS compliant?
Yes, the SN74HC688DWRE4 is RoHS compliant).
