HD404818 Datasheet, PDF (94/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 Series
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
OSC₁, OSC₂
250 800 900 kHz
X1, X2
32.768
kHz
Instruction cycle t_cyc
time
4.45 5
16 µs
Oscillator
t _RC
stabilization time
OSC₁, OSC₂
7.5 ms f_OSC = 400 kHz
1
External clock
f _CP
frequency
X1, X2
OSC₁
7.5 ms f_OSC = 800 kHz
1
3
s
T_a= –10° to 60°C 2
250
900 kHz
3
External clock high t_CPH
OSC₁
525
ns
3
width
External clock low t_CPL
OSC₁
525
ns
3
width
External clock rise t_CPr
time
OSC₁
30 ns
3
External clock fall t_CPf
time
OSC₁
30 ns
3
INT₀ high width t_IH
INT₀ low width
t _IL
INT₁ high width t_IH
INT₁ low width
t _IL
RESET high width t_RSTH
Input capacitance C_in
Reset fall time
t _RSTf
Analog
t _CSTB
comparator
stabilization time
INT₀
2
INT₀
2
INT₁
2
INT₁
2
RESET
2
D₁₀
All pins except D₁₀
D₁₂, D₁₃
t _cyc/
4, 6
t _subcyc
t _cyc/
4, 6
t _subcyc
t _cyc
4
t _cyc
4
t _cyc
5
15 pF f = 1 MHz, V_in = 0 V 8
90 pF f = 1 MHz, V_in = 0 V 9
15 pF f = 1 MHz, V_in = 0 V
20 ms
5
2
t _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.
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