It is used to pack in Rail/Tube case. The timer clock contains 20 pins. The supply voltage of the programmable timer can rate 5V. You can read the timer clock's additional feature in the follwing: RETRIGGERABLE; TRIGGERABLE FROM CLEAR INPUT ALSO. The sum of the IC chip pins is 20 . The number of the chip's terminations sums up to 20.
JM38510/31401B2A Features
Package / Case: Rail/Tube Additional Feature: RETRIGGERABLE; TRIGGERABLE FROM CLEAR INPUT ALSO
JM38510/31401B2A Applications
There are a lot of Texas Instruments JM38510/31401B2A Programmable Timers & Oscillators applications.