Product data

HD404818 Series
92
AC Characteristics (HD40L4812, HD40L4814, HD40L4816, HD40L4818: V
CC
= 2.7 to 6 V;
HD407L4818: V
CC
= 3 to 5.5 V; GND = 0 V, T
a
= –20°C to +75°C, unless otherwise specified)
Item Symbol Pin(s) Min Typ Max Unit Test Condition Notes
Oscillation
frequency
f
OSC
OSC
1
, OSC
2
250 800 900 kHz
X1, X2 32.768 kHz
Instruction cycle
time
t
cyc
4.45 5 16 µs
Oscillator
stabilization time
t
RC
OSC
1
, OSC
2
7.5 ms f
OSC
= 400 kHz 1
7.5 ms f
OSC
= 800 kHz 1
X1, X2 3 s T
a
= –10° to 60°C2
External clock
frequency
f
CP
OSC
1
250 900 kHz 3
External clock high
width
t
CPH
OSC
1
525 ns 3
External clock low
width
t
CPL
OSC
1
525 ns 3
External clock rise
time
t
CPr
OSC
1
30 ns 3
External clock fall
time
t
CPf
OSC
1
30 ns 3
INT
0
high width t
IH
INT
0
2t
cyc/
t
subcyc
4, 6
INT
0
low width t
IL
INT
0
2t
cyc/
t
subcyc
4, 6
INT
1
high width t
IH
INT
1
2t
cyc
4
INT
1
low width t
IL
INT
1
2t
cyc
4
RESET high width t
RSTH
RESET 2 t
cyc
5
Input capacitance C
in
D
10
15 pF f = 1 MHz, V
in
= 0 V 8
90 pF f = 1 MHz, V
in
= 0 V 9
All pins except D
10
15 pF f = 1 MHz, V
in
= 0 V
Reset fall time t
RSTf
20 ms 5
Analog
comparator
stabilization time
t
CSTB
D
12
, D
13
2t
cyc
7
Notes: 1. The oscillator stabilization time is the period from when V
CC
reaches 2.7 V (HD407L4818: V
CC
=
3.0 V) at power-on until the oscillator stabilizes, or after RESET goes high. At power-on or when
recovering from stop mode, RESET must be kept high for more than t
RC
. Since t
RC
depends on
the ceramic oscillator’s circuit constant and stray capacitance, consult with the ceramic oscillator
manufacturer when designing the reset circuit.