Features: SpecificationsDescriptionThe NJM2252 has the following features including 9V spec, (Reconnnended operational voltage range 8.6-9.4V);Wide band (Y signal line IOMHz, C signal line 8MHz);Output sag. correction circuit incorporated (Y signal line);Video switch incorporated (Y signal line 4 input, C signal line 3 input);Clamp circuit (Y signal line) Bias circuit (C signal line) incorporated;Package Outline SDIP22;Bipolar Technology.
NJM2252 is the IC that has been developed for VCR application,which has the super-impose function as well as the Function to drive the S-VHS, S-output pin by putting the external transistor.NJM2252 has Y signal pin and C singal pin of each independent circuit in it. Y signal line is selectable of 4 inputs, and C slpnal line is selectable of 3 ingots, each by the inside switches.Further more, it has function to adjust the output level of S-VHS,Spin.This IC reduires 1M resistance between INIPUT and GND pin for clamp type input since the minute current causes an unstable pin voltabe.In order to set the gain within the IC, the gain control circuit compares the voltage(Typ 2.5V), the one wa}ich was decided by the resistance the voltage (Typ 2.5V), the one wlsiclt was decided by the resistance division, and the gain control pin voltage, and then it is advisable to apply voltage on the gain control pin after the process of the resistance division of the supply voltage.
The output of NJM2252 included the sag, when once again, being input at sag correctinn pin through coupling capacitance, and it can be done to take out the output from Y out in which that there is no sttg at all.In case when the sag correction function is not required on operation, it is advisable to use it by connecting II pin directly.In order to set the gain within the IC, the gain control circuit compares the voltage(Typ 2.5V), the one which was decided by the resistance division, and the gain control pin voltage, and then NJM2252 is advisable to apply voltage on the gain control pin, after the process of resistance division of the supply voltage.
NJM2252 Data Sheet
