11AA161-I/P Part Information
Details for 11AA161-I/P by Microchip Technology
11AA161
Part Description
Need more microcontroller pins for new features? Want to stay with a low pin-count microcontroller rather than switching to a more expensive one? Microchip’s UNI/O® bus serial EEPROM uses only one connection to the host microcontroller. This compares to two or three pins for I2C and three to six pins for Microwire or SPI buses. This proprietary bus offers advanced features like a status register and write protection on demand, along with all I/O, memory array and command functions through a single pin. This device has a unique device address (0xA1) to help connect 2 UNI/O EEPROMs on the same bus.
Part Downloads

Part Features
- Single I/O Interface
- 16 Kbit Memory Densities
- 1.8-5.5V Operating Voltage
- 10-100 kHz Operating Frequency
- 1 Million Erase/Write Cycles
- Software Write Protect: ¼, ½, or Full Array
- Status Register
- Set/Erase entire memory with a single command
- ESD Protection > 4kV
- Unique device address (0xA1) to connect 2 UNI/O EEPROMs on the same bus.
Part Specifications
Cascade | 2 |
Data Retention (Years) | 200 |
Density (Organization) | 16K bit (x8) |
Endurance | 1,000,000 |
Max. Clock Freq. | 100 kHz |
Max. Stand By Current (µA) | 1 |
Memory Organization | 1 |
Min CLock Freq. | 10 kHz |
Operating Voltage Min. (V) | 1.8 |
Oper Voltage Max (V) | 5.5 |
Page Size (bytes) | 16 |
ProgMemoryKB | 2.00 |
Write Current | 5 |
Write Speed (ms) | 5 |
ESD | 4000V |
Memory Size | 16K |
Memory Size Num | 16000 |
Read Current | 3 |
Write Protect Scheme | Quarter Array |
Temperature Range | -40C to +85C |
Alternative Part Descriptions
- 16K, 2048 X 8 1.8V SERIAL EE, IND, ALTERNATE ADDRESS OPTION, 8 PDIP .300IN TUBE ROHS COMPLIANT: YES | Newark Electronics
- EEPROM Serial 16K-bit 2K x 8 2.5V/3.3V/5V 8-Pin PDIP Tube | Avnet America
- 16K, 2048 X 8 1.8V SERIAL EE, IND, Alternate address option | Allied Electronics & Automation
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