1 Introduction
In order to optimize the manufacturing process and to further reduce current consumption, an optimized version of ATtiny13 has been introduced.
The ATtiny13A is a functionally identical, drop-in replacement for the ATtiny13. All devices are subject to the same qualification process and same set of production tests but since the manufacturing process is not the same, some electrical characteristics differ. In addition, the performance of some analogue modules such as the Brown-Out Detector (BOD) and Power-On Rest (POR) has been improved. Some new features have also been added to the ATtiny13A.
ATtiny13 and ATtiny13A have separate data sheets. This application note aims to outline the differences between the two devices and the data sheets, but there is also a detailed change log to assist the user at the end of the ATtiny13A data sheet. Remember to always use the latest revision of the device data sheet.
Minor differences in typical characteristics are not discussed in this document as long as the low and high limits remain the same. For detailed information about the typical characteristics, see sections “Electrical Characteristics” and “Typical Characteristics” of the device datasheets.
2 Changes in Characteristics
This section outlines such differences in characteristics that may have an effect on the application in which the device is used. For detailed information, refer to the most recent version of the device data sheets.
2.1 Current Consumption
Active and Idle mode current consumption of the device have been reduced. The tables below present typical current consumption figures at room temperature. All values are taken from device data sheets, unless otherwise noted.
Notes: 1. These values were obtained using the same device configuration and test bench as with ATtiny13A. Values in ATtiny13 data sheet were obtained using a different set up.
2.2 VOL/VOH Levels
In Table 2-3 are listed differences in output low and high voltage levels.
2.3 Reset
Table 2-4 summarizes the differences between the reset circuitry of ATtiny13 and thatof ATtiny13A.
3 New Bits and Registers
In Table 3-1 are listed registers and bits that have been added to the device as a result of functional enhancements. In ATtiny13 these bits and registers were marked as reserved.
For more details on the functional enhancements, see ATtiny13A data sheet.
