![](http://datasheet.mmic.net.cn/280000/HD404314_datasheet_16064486/HD404314_60.png)
HD404318 Series
60
AC Characteristics (V
CC
= 4.0 to 5.5 V, GND = 0 V, V
disp
= V
CC
– 40 V to V
CC
, T
a
= –20 to +75
°
C)
Item
Symbol Pins
Min
Typ
Max
Unit
Test Condition
Note
Clock oscillation
frequency
f
OSC
OSC
1
, OSC
2
0.4
4
4.5
MHz
System clock
divided by 4
Instruction cycle time
t
cyc
t
RC
0.89
1
10
μ
s
Oscillation stabilization
time (ceramic oscillator)
OSC
1
, OSC
2
—
—
7.5
ms
1
Oscillation stabilization
time (crystal oscillator)
t
RC
OSC
1
, OSC
2
—
—
40
ms
1
External clock high width
t
CPH
t
CPL
t
CPr
t
CPf
t
IH
OSC
1
OSC
1
OSC
1
OSC
1
INT
0
,
INT
1
,
EVNB
INT
0
,
INT
1
,
EVNB
RESET
STOPC
RESET
STOPC
92
—
—
ns
2
External clock low width
92
—
—
ns
2
External clock rise time
—
—
20
ns
2
External clock fall time
INT
,
INT
1
, EVNB high
widths
—
—
20
ns
2
2
—
—
t
cyc
3
INT
,
INT
1
, EVNB low
widths
t
IL
2
—
—
t
cyc
3
RESET
low width
STOPC
low width
RESET
rise time
STOPC
rise time
t
RSTL
t
STPL
t
RSTr
t
STPr
C
in
2
—
—
t
cyc
t
RC
ms
4
1
—
—
5
—
—
20
4
—
—
20
ms
5
Input capacitance
All input pins
except TEST
—
—
30
pF
f = 1 MHz, V
in
= 0 V
TEST
—
—
30
pF
6
—
—
180
pF
7
Notes: 1. The oscillation stabilization time is the period required for the oscillator to stabilize in the
following situations:
a. After V
CC
reaches 4.0 V at power-on.
b. After
RESET
input goes low when stop mode is cancelled.
c. After
STOPC
input goes low when stop mode is cancelled.
To ensure the oscillation stabilization time at power-on or when stop mode is cancelled,
RESET
or
STOPC
must be input for at least a duration of t
RC
.
When using a crystal or ceramic oscillator, consult with the manufacturer to determine what
stabilization time is required, since it will depend on the circuit constants and stray capacitance.
2. Refer to figure 51.
3. Refer to figure 52.
4. Refer to figure 53.
5. Refer to figure 54.
6. Applies to the HD404314, HD404316, and HD404318.
7. Applies to the HD4074318.