D75108CW NEC, D75108CW Datasheet - Page 49

• Manufacturer Part Number: D75108CW
• Description: Search -----> UPD75108CW
• Manufacturer: NEC

www.DataSheet4U.com
OSCILLATOR CIRCUIT CHARACTERISTICS
(T
a
Ceramic
Crystal
External Clock
*1: The oscillation frequency and X1 input frequency are indicated only to express the characteristics
Note:
= -40 to +85 C, V
2: Time required for oscillation to stabilize after V
3: When the oscillation frequency is 4.19 MHz
Oscillator
of the oscillator circuit. For instruction execution time, refer to AC Characteristics.
or the STOP mode has been released.
instruction execution time: otherwise, one machine cycle is set to less than 0.95 s, falling short
of the rated minimum value of 0.95 s.
When using the oscillation circuit of the system clock, wire the portion enclosed in dotted line
in the figures as follows to avoid adverse influences on the wiring capacity:
• Keep the wiring length as short as possible.
• Do not cross the wiring over the other signal lines. Also, do not route the wiring in the vicinity
• Always keep the ground point of the capacitor of the osccillator circuit at the same potential
• Do not extract signals from the oscillation circuit.
of lines through which a high alternating current flows.
as V
SS
C1
C1
Recommended
. Do not connect the ground pattern through which a high current flows.
X1
X1
X1
DD
Constants
= 2.7 to 6.0 V)
PD74HCU04
X2
X2
X2
C2
C2
Oscillation
frequency(f
Oscillation stabiliza- After V
tion time*
frequency (f
Oscillation stabiliza- V
tion time*
X1 input frequency
(f
X1 input high-,
low-level widths
(t
Oscillation
X
XH
)*
, t
1
XL
)
Item
2
2
XX
XX
)*
)*
1
1
DD
fx
V
voltage range
MIN. of oscillation
voltage range
DD
DD
has come to MIN. of oscillation volrage range
Conditions
= Oscillation
= 4.5 to 6.0 V
5.0 MHz, do not select PCC = 0011 as the
DD
come to
MIN.
100
2.0
2.0
2.0
PD75104, 75106, 75108
TYP.
4.19
MAX.
250
5.0
5.0
5.0
10
30
4
*
*
*
3
3
3
Unit
MHz
MHz
MHz
ms
ms
ms
ns
49