UPD7554AA Ver la hoja de datos (PDF) - NEC => Renesas Technology

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UPD7554AA

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD7554A, 7554A(A)

1.5 PIN INPUT/OUTPUT CIRCUITS

This section presents the input/output circuit for each pin of the µPD7554A in a partly simplified format:

(1) Type A (for Type W)

VDD

P–ch

IN

N–ch

Forming an input buffer conformable to the CMOS specification

(2) Type D (for Types W and X)

VDD

data

output

disable

P–ch

OUT

N–ch

Forming a push-pull output which becomes high impedance (with both P-ch and N-ch off) in response to

RESET input

9

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