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UPD7564 Datasheet(PDF) 8 Page - NEC

Part # UPD7564
Description  4-BIT SINGLE-CHIP MICROCOMPUTER
PDF  56 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD7564 Datasheet(HTML) 8 Page - NEC

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µPD7564A, 7564A(A)
1.5
PIN INPUT/OUTPUT CIRCUITS
This section presents the input/output circuit for each pin of the
µPD7564A in a partly simplified format:
(1) Type A (for Type W)
VDD
P–ch
N–ch
IN
Forming an input buffer conformable to the CMOS specification
(2) Type D (for Types W and X)
VDD
P–ch
N–ch
OUT
data
output
disable
Forming a push-pull output which becomes high impedance (with both P-ch and N-ch off) in response to
RESET input



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