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µ
PD78C14(A)
31
Oscillation Characteristics (T
A
= –40 to +85 ˚C, V
DD
= AV
DD
= +5.0 V
±
10 %, V
SS
= AV
SS
= 0 V,
V
DD
– 0.8 V
≤
AV
DD
≤
V
DD
, 3.4 V
≤
V
AREF
≤
AV
DD
)
Resonator
Recommended Circuits
Parameter
Test Conditions
MIN.
MAX.
UNIT
Ceramic
Oscillation Frequency (fxx) A/D Converter
4
15
MHz
Resonator
Not used
or
Crystal
Resonator
Note
A/D Converter
5.8
15
MHz
Used
External
X1 Input Frequency
A/D Converter
4
15
MHz
Clock
(fx)
Not used
A/D Converter
5.8
15
MHz
Used
X1 Input
0
20
ns
Rise, Fall Time (t
r
, t
f
)
X1 Input High, Low
20
250
ns
Level Width (tø
H
, tø
L
)
Cautions
1. Oscillator circuit should be in the nearest area from X1 and X2 pins.
2. Do not place other signal lines within the area enclosed with broken lines.
Note
For a crystal resonator, the following external capacitances are recommended: C1 = C2 = 10 pF
CAPACITANCE (T
A
= 25 ˚C, V
DD
= V
SS
= 0 V)
Parameter
Symbol
Test Condition
MIN.
TYP.
MAX.
UNIT
Input Capacitance
C
I
f
C
= 1 MHz
10
pF
Output Capacitance
C
O
Unmeasured pins returned to 0 V
20
pF
I/O Capacitance
C
IO
20
pF
X1
X2
C1
C2
X1
X2
HCMOS
Inverter
*