SLFS043I September 1983 – July 2019 TLC555
The TLC555 internal HBM and CDM protection allows for safe assembly in ESD controlled environments. In applications that may expose pins of the TLC555 to ESD, additional protection is highly recommended. The test board schematic below has bypass capacitors, current-limiting resistors, and voltage clamping TVS diodes to provide additional protection for commonly exposed pins [Reset, Trig, and Output] against ESD.
The table below gives the ESD protection levels recorded for different supply voltages and external components populated. Using only passive components to protect the TLC555 with a single 15-V supply is not recommended because the higher voltage allows for an unacceptable amount of current to flow through the device.