µPD750104, 750106, 750108, 750104(A), 750106(A), 750108(A)
3.3 Pin Input/Output Circuits
The input/output circuit of each µPD750108 pin is shown below in a simplified manner.
Type A
Type D
(1/2)
VDD
P-ch
IN
N-ch
Data
Output
disable
VDD
P-ch
OUT
N-ch
CMOS input buffer
Push-pull output which can be set to high-impedance output
(off for both P-ch and N-ch)
Type B
IN
Schmitt trigger input with hysteresis
Type B-C
VDD
P.U.R.
P-ch
P.U.R.
enable
IN
P.U.R.: Pull-Up Resistor
Type E-B
Data
Output
disable
P.U.R.
enable
Type D
VDD
P.U.R.
P-ch
IN/OUT
Type A
Type F-A
Data
Output
disable
P.U.R.: Pull-Up Resistor
P.U.R.
enable
Type D
VDD
P.U.R.
P-ch
IN/OUT
Type B
P.U.R.: Pull-Up Resistor
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