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Additional Pictures 

 

Clock Frequency vs External Resistor of a HD36290 single-chip calculator circuit.
DUT: HD36290 5D 21 @ VDD = -7.0 V, VGG = -15.0 V.
Clock Frequency vs VDD Supply Voltage of a HD36290 single-chip calculator circuit.
DUT: HD36290 5D 21 @ VGG = -15.0 V, REXT = 180 kOhm.
Clock Frequency vs VGG Supply Voltage of a HD36290 single-chip calculator circuit.
DUT: HD36290 5D 21 @ VDD = -7.0 V, REXT = 180 kOhm.


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© Joerg Woerner, November 13, 2024. No reprints without written permission.