If you are looking for a 16K bytes flash microcontroller unit, then the ATMEGA16A is a 16Kbit low power high-performance CMOS Microcontroller based on the Atmel AVR enhanced RISC architecture. 
 
With the 16kB self-programming flash program memory it is powered by the 1024B SRAM and 512-byte EEPROM it has peripheral support of 8 channel 10-bit Analog to Digital converter. For debugging and Programming, it has a JTAG interface for on-chip-debug. It can operate from 2.7V to 5.5V operating voltages. Peripheral support includes SPI, Timer, USART.
 
Atmega16 features, specification
Features: -
It has advanced RISC architecture
32 Programmable I/O Pins for with multiple operations
Internal Calibrated RC oscillator
Real-time counter that uses separate oscillator
Power-on reset (POR) and programmable brown-out detection
External and internal interrupt sources
Mode of operations - Idle, ADC noise reduction, power-save, power-down, standby and extended standby
 
Specification: -
Package/Case   :  PDIP-40
Minimum Supply Voltage (V)     :   7V
Maximum Supply Voltage (V)     :   5V
of Timers/Counters     :   3 Timers
of I/Os       :    32
Architecture    :   8-bit Microcontrollers – MCU
Product Series           :        ATmega16A
Maximum Clock Frequency (MHz)  :  16
Data Bus Width        :    8 bit
Interface Supports     :   2-Wire, SPI, USART
Mounting Type               :     Through Hole, DIP Package
Program Memory Size (kB)     :   16
Data RAM size and Type     :   1KB SRAM
Data ROM Size and Type   :   512-B EEPROM
Operating Temperature Range (°C)   :-24 to 85
 
Atmega16a Applications:
Data logging
Controlled Operations
Data processing and small applications where Input output single bit data transfer is required.
Sensor Integration
Computer and Microcontroller communications
DIMENSIONS = Length: ~52.5 mm (2.07 in) Width: ~7.6 mm (0.3 in) Height: ~4.5 mm (0.18 in)
 
Additional Resources:
Atmega16a Datasheet
 
Package Contains
1x Atmega16a (DIP Package)