The JRC4558 is a classic and widely used dual operational amplifier IC manufactured by New Japan Radio Co., Ltd. (NJR) of Japan. It is well known for its distinctive tone, producing a warm sound with a touch of vintage character. This makes it particularly popular in guitar overdrive pedals. For example, the legendary Ibanez TS9 and TS808 Tube Screamer pedals use this IC at the heart of their circuits.
Key Features and Specifications
• Type: Dual operational amplifier (contains two independent op-amp channels) • Package Types: Commonly available in DIP-8 (through-hole) and SOP-8 (surface-mount) packages • Operating Voltage: Approximately ±2.25V to ±16V with dual power supplies (also supports single-supply operation) • Gain-Bandwidth Product (GBW): Approximately 3 MHz • Pin Compatibility: Has a similar pin configuration to classic op-amps such as the MC1458 and LM358.
Datasheet
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