26LS32 Quad Differential Line Receiver

Overview

The 26LS32 is a quad differential line receiver designed to meet the EIA Standards for the Electrical Characteristics of Balanced/Unbalanced Voltage Digital Interface Circuits. This component is widely used in data transmission systems where noise immunity and signal integrity are critical. The device features four independent receiver chains, each capable of handling balanced or unbalanced digital signals. With its robust design, the 26LS32 ensures reliable performance in industrial, telecommunications, and computing applications.

Features

• Four Independent Receiver Chains: Each receiver complies with EIA standards for balanced/unbalanced voltage digital interfaces.
• 74LS-Compatible Outputs: The receiver outputs are designed to be compatible with 74LS logic families.
• Three-State Outputs: Outputs can be forced into a high-impedance state using control pins (Pin 4 and Pin 12).
• PNP Output Control Buffers: Minimizes loading on control pins, ensuring efficient operation for both Logic "1" and Logic "0" inputs.
• Internal Hysteresis: Enhances noise margin and prevents output instability for slowly changing input signals.
• Wide Operating Voltage Range: Suitable for various industrial and commercial applications.
• High Noise Immunity: Designed to operate reliably in electrically noisy environments.

Applications

The 26LS32 is ideal for a variety of applications where differential signaling is required to ensure data integrity over long distances or in noisy environments. Key applications include:

• Industrial Control Systems: Used in PLCs (Programmable Logic Controllers) and factory automation systems.
• Telecommunications: Employed in data transmission equipment and network infrastructure.
• Computing: Integrated into servers, data centers, and high-speed data acquisition systems.
• Automotive Electronics: Utilized in vehicle communication networks (e.g., CAN bus systems).
• Medical Equipment: Ensures reliable signal transmission in diagnostic and monitoring devices.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): 7V
• Input Voltage (V_IN): ±15V
• Output Voltage (V_OUT): 5.5V
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (V_CC): 4.75V to 5.25V
• Input Differential Voltage (V_ID): ±200mV to ±6V
• Input Common-Mode Voltage Range (V_IC): ±7V
• Output Current (I_OUT): ±8mA

DC Electrical Characteristics

• High-Level Output Voltage (V_OH): 2.7V (min) at I_OH = -400µA
• Low-Level Output Voltage (V_OL): 0.5V (max) at I_OL = 8mA
• Input Current (I_IN): ±1µA (max) at V_IN = ±15V
• Supply Current (I_CC): 20mA (max) per receiver

AC Electrical Characteristics

• Propagation Delay (t_PLH, t_PHL): 20ns (max) at C_L = 15pF
• Output Enable/Disable Time (t_PZH, t_PHZ): 25ns (max)
• Input Hysteresis (V_HYS): 50mV (min)

Package Information

The 26LS32 is available in multiple package options to suit different application requirements. Below are the details for the most common packages:

16-Pin DIP (Dual In-Line Package)

• Package Code: N
• Dimensions: 19.3mm x 6.35mm x 4.57mm
• Pin Pitch: 2.54mm
• Material: Plastic

16-Pin SOIC (Small Outline Integrated Circuit)

• Package Code: D
• Dimensions: 9.9mm x 3.9mm x 1.75mm
• Pin Pitch: 1.27mm
• Material: Plastic

16-Pin TSSOP (Thin Shrink Small Outline Package)

• Package Code: PW
• Dimensions: 5mm x 4.4mm x 1.2mm
• Pin Pitch: 0.65mm
• Material: Plastic

Conclusion

The 26LS32 quad differential line receiver is a versatile and reliable component designed for high-performance data transmission applications. Its compliance with EIA standards, robust noise immunity, and flexible package options make it an excellent choice for engineers working in industrial, telecommunications, and computing environments. With features like three-state outputs and internal hysteresis, the 26LS32 ensures signal integrity and operational stability even in challenging conditions.