I. Practical requirements:
1.Package: QFN package
2. Pin number: 24pin
3. Pitch: 0.4mm
4. Chip type: cost-effective digital chips for professional medical hearing aids and assistive listening devices
5.Test requirements: chip functional debugging, burning and mass production
Chip features: low-power chip, built-in Bluetooth, built-in DC/DC, or LDO; also need to ensure that the chip is in use in the sound and other functions.
Requirements analysis: the use of downward pressure test bench, the need to do mass production testing; to ensure that the chip's sound effect function and Bluetooth transmission control and so on;
Fourth, the test holder using the downward pressure structure, need to pay attention to the spring, probe fit, etc., the size of the test match ok.
