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UPD78C18 Datasheet(PDF) 89 Page - NEC

Part # UPD78C18
Description  8-BIT SINGLE-CHIP MICROCONTROLLER WITH A/D CONVERTER
PDF  110 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD78C18 Datasheet(HTML) 89 Page - NEC

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89
µPD78C17,78C18
Cautions
1.
Place the oscillator as close as possible to X1, X2 pins.
2.
Ensure that no other signal lines are routed through the area enclosed with dotted lines.
CAPACITANCE (TA = 25
°C, VDD = VSS = 0 V)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Input capacitance
CI
fC = 1 MHz
10
pF
Unmeasured pins
Output capacitance
CO
returned to 0 V
20
pF
Input-output capacitance
CIO
20
pF
OSCILLATOR CHARACTERISTICS
(TA = –40 to +85
°C, VDD = AVDD = +5.0 V ±10 %, VSS = AVSS = 0 V,
VDD – 0.8 V
≤ AVDD ≤ VDD, 3.4 V ≤ VAREF ≤ AVDD)
X1
X2
HCMOS
Inverter
RESONATOR
RECOMMENDED CIRCUIT
PARAMETER
TEST CONDITIONS
MIN.
MAX.
UNIT
Ceramic
Oscillation frequency
A/D converter not
4
15
MHz
or
(fXX)
used
crystal
resonator
A/D converter used
5.8
15
MHz
External
X1 input frequency
A/D converter not
4
15
MHz
clock
(fX)
used
A/D converter used
5.8
15
MHz
X1 rise time,
0
20
ns
fall time (tr, tf)
X1 input high, low
20
250
ns
level width (tØH, tØL)
X1
X2
C2
C1



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