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The part UPC4558G2(5)-E1 is manufactured by NEC. Below are the specifications, descriptions, and features based on factual information:

Specifications:

• Manufacturer: NEC
• Type: Dual Operational Amplifier (Op-Amp)
• Package: DIP-8 (Dual In-line Package, 8 pins)
• Operating Voltage Range: ±4V to ±18V (Dual Supply)
• Input Offset Voltage: Typically 2mV (max 6mV)
• Input Bias Current: Typically 20nA
• Gain Bandwidth Product: Typically 3MHz
• Slew Rate: Typically 1.5V/µs
• Common Mode Rejection Ratio (CMRR): 80dB (min)
• Power Supply Rejection Ratio (PSRR): 80dB (min)
• Operating Temperature Range: -20°C to +75°C

Descriptions:

• The UPC4558G2(5)-E1 is a high-performance dual operational amplifier designed for general-purpose applications.
• It features internal frequency compensation, eliminating the need for external components.
• Suitable for audio amplification, active filters, and signal conditioning circuits.

Features:

• Low Noise: Optimized for audio and precision applications.
• Wide Supply Voltage Range: Supports ±4V to ±18V operation.
• High Gain Bandwidth Product: Ensures stable performance in feedback circuits.
• Short-Circuit Protection: Built-in protection against output short circuits.
• Internal Phase Compensation: Simplifies circuit design.

This information is based solely on the manufacturer's datasheet and technical documentation.