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RTC - 72421 / 72423
Page - 4 MQ - 162 - 03
Characteristics
1. Absolute maximum ratings
Item Symbol Condition Specification Unit
Supply voltage V
DD
Ta=+25
°
C
−
0.3 to 7.0
V
Input voltage V
I
Ta=+25
°
C GND
−
0.3 to V
DD
+0.3
V
Output voltage V
O
Ta=+25
°
C GND
−
0.3 to V
DD
+0.3
V
RTC-72421
−
55 to +85
°
C
Storage temperature T
STG
RTC-72423
−
55 to +125
°
C
2. Recommended operating conditions
Item Symbol Condition Specification Unit
Supply voltage V
DD
4.5 to 5.5 V
RTC-72421 ;
−
10 to +70
°
C
Operating temperature T
OPR
No condensation
RTC-72423 ;
−
40 to +85
°
C
Data hold voltage V
DH
2.0 to 5.5 V
CS
1
data hold time t
CDR
Operation recovery time tr
See the section on data
hold timing
2.0 Min.
µ
s
3. Frequency characteristics and current consumption characteristics
Item Symbol Condition Specification Unit
RTC-72421A
±
10
RTC-72421B
±
50
RTC-72423A
±
20
Frequency tolerance
∆
f/f0
Ta=+25
°
C
V
DD
=5.0 V
RTC-72423
±
50
RTC-72421 :
−
10
°
C to +70
°
C
(+25
°
C reference)
+10 /
−
120
Operation temperature
RTC-72423 :
−
40
°
C to +85
°
C
(+25
°
C reference)
+10 /
−
220
×
10
-6
Frequency voltage
characteristics
Ta=+25
°
C
V
DD
=2.0 V to 5.5 V
±
5
Max.
×
10
-6
/ V
Aging fa
V
DD
=5.0 V, Ta=+25
°
C
±
5 Max.
×
10
-6
/ year
Shock resistance S.R.
Drop test 3 times on a hard board from
0.75 m height, or 29400 m/s
2
×
0.2 ms
×
1/2 sin wave
×
3 directions
±
10 Max.
×
10
-6
I
DD
1 V
DD
=5.0 V 1.0 Typ. 10 Max.
Current consumption
I
DD
2
Ta=+25
°
C, CS
1
=0 V
I/O currents excluded
V
DD
=2.0 V 0.9 Typ. 5 Max.
µ
A
4. Electrical characteristics ( DC characteristics )
Item Symbol Condition Applicable pins Min. Typ. Max. Unit
High input voltage 1 V
IH
1 2.2 V
Low input voltage 1 V
IL
1
All input pins except for
CS
1
0.8
High input voltage 2 V
IH
2
4/5V
DD
Low input voltage 2 V
IL
2
V
DD
=2.0 V to
5.5 V
CS
1
1/5V
DD
V
Input leakage current 1 I
LK
1
Input pins except for
D
0
to D
3
1/-1
µ
A
Input leakage current 2 I
LK
2
V
I
=V
DD
/0 V
10/-10
Low output voltage 1 V
OL
1 I
OL
=2.5 mA 0.4
High output voltage V
OH
I
OH
=-400
µ
A
D
0
to D
3
2.4
Low output voltage 2 V
OL
2 I
OL
=2.5 mA 0.4
V
Off-state leakage current I
OFFLK
V
I
= V
DD
/ 0 V
STD.P
10/-10
µ
A
Input capacitance C
I
Input pins except for
D
0
to D
3
10
Input-output capacitance C
I
/
O
Input
frequency
1 MHz
D
0
to D
3
and STD.P
20
pF