DESCRIPTION
The Microchip Technology Inc. 24AA174 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 1.8 volts (end-of-life voltage for most popular battery technologies) with standby and active currents of only 5 µA and 1 mA respectively. The 24AA174 also has a page-write capability for up to 16 bytes of data. The 24AA174 is available in the standard 8-pin DIP and 8-lead surface mount SOIC packages.

FEATURES
• Single supply with operation down to 1.8V
• 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 (1.8V) 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 for commercial temperature range
   - Commercial (C): 0°C to +70°C