Overview
The 74HC85DB,112 from Nexperia USA Inc. is a 4-bit magnitude comparator integrated circuit. This component is designed to compare two 4-bit binary, BCD, or other monotonic codes and provide the three possible magnitude results at the outputs (A > B, A = B, and A < B). It is part of the 74HC and 74HCT series, known for their wide supply voltage range and low power dissipation.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| VCC | 2.0 to 6.0 V | Supply voltage range |
| Logic switching levels | CMOS (74HC85), TTL (74HCT85) | Input logic levels |
| Output drive capability | ± 5.2 mA (74HC85), ± 4 mA (74HCT85) | Maximum output current |
| tpd | 23 ns (74HC85), 26 ns (74HCT85) | Propagation delay |
| Number of bits | 4 | Number of bits compared |
| Power dissipation | Low | Power consumption characteristics |
| Tamb | -40 °C to +125 °C | Operating temperature range |
| Package | SSOP16 (SOT339-1) | Package type |
Key Features
- Wide supply voltage range: Operates from 2.0 to 6.0 V for 74HC85 and 4.5 to 5.5 V for 74HCT85.
- Low power dissipation: CMOS technology ensures low power consumption.
- High noise immunity: Robust against noise and interference.
- Latch-up performance: Exceeds 100 mA per JESD 78 Class II Level B.
- ESD protection: HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V.
- Expandable: Can be cascaded to compare words greater than 4 bits.
Applications
- Process controllers: Used in control systems to compare and manage process variables.
- Servo-motor control: Employed in servo systems to ensure precise control and comparison of signals.
Q & A
- What is the primary function of the 74HC85DB,112?
The primary function is to compare two 4-bit binary, BCD, or other monotonic codes and provide the three possible magnitude results.
- What is the supply voltage range for the 74HC85DB,112?
The supply voltage range is from 2.0 to 6.0 V for the 74HC85 and 4.5 to 5.5 V for the 74HCT85.
- What are the logic switching levels for this component?
The logic switching levels are CMOS for the 74HC85 and TTL for the 74HCT85.
- How many bits can the 74HC85DB,112 compare?
The component can compare 4-bit codes.
- Can the 74HC85DB,112 be cascaded for longer comparisons?
- What is the operating temperature range for this component?
The operating temperature range is from -40 °C to +125 °C.
- What kind of ESD protection does the 74HC85DB,112 have?
The component has HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V and CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V ESD protection.
- What are some common applications of the 74HC85DB,112?
Common applications include process controllers and servo-motor control systems.
- What package types are available for the 74HC85DB,112?
The component is available in SSOP16 (SOT339-1) package.
- Does the 74HC85DB,112 have any specific noise immunity features?
- What is the propagation delay for the 74HC85DB,112?
The propagation delay is 23 ns for the 74HC85 and 26 ns for the 74HCT85.
