DESCRIPTION The Microchip Technology Inc. 24LC174 is a cascadable 16K bit Electrically Erasable PROM. The device is organized as eight blocks of 256 x 8-bit memory with a 2-wire serial interface and provides a specially addressed OTP (one-time programmable) 16 byte security block. Low voltage design permits operation down to 2.5 volts with standby and active currents of only 5 µA and 1 mA respectively. The 24LC174 also has a page-write capability for up to 16 bytes of data. The 24LC174 is available in the standard 8-pin DIP and 8-lead surface mount SOIC packages. The three select pins, A0, A1, and A2, function as chip select inputs and allow up to eight devices to share a common bus, for up to 128K bits total system EEPROM. FEATURES • Single supply with operation down to 2.5V • 16 bytes OTP Secure Memory • Low power CMOS technology - 1 mA active current typical - 10 µA standby current typical at 5.5V - 5 µA standby current typical at 3.0V • Organized as eight blocks of 256 bytes (8 x 256 x 8) • 2-wire serial interface bus, I2C compatible • Functional address inputs for cascading up to 8 devices • Schmitt trigger, filtered inputs for noise suppression • Output slope control to eliminate ground bounce • 100 kHz (2.5V) and 400 kHz (5V) compatibility • Self-timed write cycle (including auto-erase) • Page-write buffer for up to 16 bytes • 2 ms typical write cycle time for page-write • Hardware write protect for entire memory • Can be operated as a serial ROM • Factory programming (QTP) available • ESD protection > 4,000V • 1,000,000 Erase/Write cycles guaranteed • Data retention > 200 years • 8-pin DIP, 8-lead SOIC packages • Available temperature ranges: - Commercial (C): 0°C to +70°C - Industrial (I): -40° to +85°
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