Overview
The SN74LS85DR is a 4-bit magnitude comparator produced by Texas Instruments. This component is designed to perform comparisons of straight binary and straight BCD (8-4-2-1) codes. It provides three fully decoded decisions about two 4-bit words (A, B) and makes these decisions externally available at three outputs. The device is fully expandable to any number of bits without the need for external gates, making it versatile for various digital comparison tasks.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (D) |
| Pins | 16 |
| Operating Temperature Range (°C) | 0 to 70 |
| Package Quantity | 2500 (Carrier) |
| Lead Finish/Ball Material | NIPDAU (Lead-free) |
| MSL Peak Temp | Level-1-260C-UNLIM |
| Device Marking | LS85 |
Key Features
- Performs comparison of straight binary and straight BCD (8-4-2-1) codes.
- Provides three fully decoded decisions: A > B, A < B, and A = B.
- Fully expandable to any number of bits without external gates.
- Cascading capability to compare words of greater length.
- Reduced comparison time with a two-gate-level delay.
- Available in various package types including SOIC, PDIP, and SOP.
Applications
- Digital logic circuits requiring magnitude comparisons.
- Binary and BCD code processing systems.
- Embedded systems and microcontrollers needing comparison logic.
- Industrial control systems and automation.
- Communication and networking equipment.
Q & A
- What is the primary function of the SN74LS85DR?
The primary function is to perform magnitude comparisons of straight binary and straight BCD (8-4-2-1) codes.
- How many bits can the SN74LS85DR compare?
The SN74LS85DR is a 4-bit magnitude comparator.
- Can the SN74LS85DR be cascaded for longer word comparisons?
Yes, it can be cascaded to compare words of greater length without the need for external gates.
- What are the operating temperature ranges for the SN74LS85DR?
The operating temperature range is from 0°C to 70°C.
- In what package types is the SN74LS85DR available?
It is available in SOIC, PDIP, and SOP package types.
- Is the SN74LS85DR RoHS compliant?
Yes, the SN74LS85DR is RoHS compliant and lead-free.
- What is the MSL peak temperature for the SN74LS85DR?
The MSL peak temperature is Level-1-260C-UNLIM.
- How many devices are typically included in a carrier package?
A carrier package typically includes 2500 devices.
- What are the typical applications of the SN74LS85DR?
Typical applications include digital logic circuits, binary and BCD code processing systems, embedded systems, industrial control systems, and communication equipment.
- Is the SN74LS85DR recommended for new designs?
Yes, the SN74LS85DR is active and recommended for new designs.
