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Q42724211XXXX00 View Datasheet(PDF) - Unspecified

Part Name
Description
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Q42724211XXXX00 Datasheet PDF : 2 Pages
1 2
Real time clock module
4-bit REAL TIME CLOCK MODULE
RTC - 72421
RTC - 72423
Built-in crystal unit allows adjustment-free efficient operation.
24 h /12 h changeable and leap year automatically adjustable
(Gregorian calendar).
Actual size
RTC-72421
Epson Toyocom
Product Number (Please contact us)
RTC-72421 : Q42724211xxxx00
RTC-72423 : Q42724231xxxx00
RTC-72423
Block diagram
D3
D2
D1
D0
WR
RD
A3
A2
A1
A0
C S0
ALE
C S1
Gat e
Gat e
OS C
Counter
R ESET S TOP
bi t
bit
30 sec ADJ
bit
H OLD BU SY
bit
bit
S1 S 10
MI1 M I10
RT C-7 2421 /724 23
24/12
bit
H1 H10
W
Latc h
S1 to
CF
De coder
D1 D 10
M O1 MO10
Y1 Y10
O u tp u t
S e le c to r
64 Hz
1 Sec ond carry
CD
CE
CF
1 M inute c arry
1 H our carry
S TD. P
Terminal connection/External dimensions
RTC-72 421 (DIP 18 -pin)
2 3.1 Ma x.
#18
#10
RTC72421 A
EPSON 1234A
#1
#9
No . Pin
te rmina l
1 STD.P
2 /CS 0
3 AL E
4
A0
5
A1
6
A2
7
A3
8 /RD
9 GND
7 .62
No . Pin
te rmina l
18 VDD
17 (VD D)
16 (VD D)
15 CS1
14 C0
13 D1
12 D2
11 D3
10 /W R
R TC -72423 (SOP 24-pin)
16.3 Max.
#24
#1 3
RTC 672423
EPSON 1 234A
#1
#12
No . Pin
te rmina l
1 STD.P
2 /CS 0
3 N.C.
4 AL E
5
A0
6 N.C.
7 A1
8 N.C.
9
A2
10 A3
11 /RD
12 GND
No . Pin
te rmina l
24 VD D
23 (VD D)
22 (VD D)
21 N.C.
20 CS1
19 D0
18 N.C.
17 N.C.
16 D1
15 D2
14 D3
13 /WR
1 .5 2
0 .4 6
2 .5 4
0. 2 4. 2
Min. Max.
3 .3
Min.
0° -15°
0 .2
2.8 Max.
0. 25
1. 27
0 .3 5
0.1 Min.
1. 0
Metal may be expo sed o n the top or bottom of th is pro duct. T his w ill not affect any qu ality, re liability o r electrical spec.
0° - 10°
(Unit:mm)
Specifications (characteristics)
*Refer to application manual for details.
Absolute Max. rating
DC characteristics
Item
Symbol Condition
Min.
Ma x.
Unit
Item
Sym bol
Condition
Min. Typ. Ma x. Unit Applicable terminal
Supply voltage VDD Ta=+25 °C
-0.3
+7.0
IDD1
CS1= 0 V VDD=5 V
1
10
-
Input voltage
VI/ O
Ta=+25 °C GND-0.3
VDD+0.3
V
Current consumption
Exclude input/
-
IDD2 output current VDD=2 V
0.9
5
µA
-
Storage
temperature *
TSTG
RTC-72421
RTC-72423
-55
-55
+85
+125
°C
HIGH input voltage (1) VIH1
LOW input voltage (1) VIL1
-
2.2
-
-
0.8
V
All inputs other than
CS1
*Stored as bare product after unpacking
Operating range
LOW output voltage (1) VOL1
HIGH output voltage
VOH
IOL=2.5 mA
IOH=-400 µA
-
0.4
-
2.4
-V
D0 to D3
Item
Symbol Condition
Min.
Power voltage VDD
-
4.5
Clock voltage VCLK
-
2.0
Ma x.
Unit
5.5
5.5
V
Operating
tem perature
TOPR
RTC-72421
RTC-72423
-10
-40
+70
+85
°C
Stored as bare produc after unpacking
Frequency characteristics
Item
Sym bol
Condition
Range Unit
Frequency
precis ion
Frequency
temperature
ch a ra cte ri sti cs
Frequency voltage
ch a ra cte ri sti cs
Aging
f /f
TOP
f/V
fa
72421A
±10
Ta=+25 °C
VDD=5.0 V
72421B
72423A
72423
±50
±20
±50
×10-6
-10 °C to +70 °C (+25 °C) +10 / -120
-40 °C to +85 °C(+25 °C) +10 / -220
Ta=+25 °C,VDD=2.0 V to 5.5 V ±5.0 Max. ×10-6/V
Ta=+25 °C,VDD=5.0 V,First year ±5.0 Max. ×10-6/year
LOW output voltage (2) VOL2
OFF leak current
IOFFLK
Input capacity
C1
HIGH input voltage (2) VIH2
LOW input voltage (2) VIL2
Input leak current (1)
ILK 1
Input leak current (2)
ILK 2
IOL=2.5 mA
V1=VDD/0 V
Input frequency
1 MH z
VDD=2.0 V to 5.5 V
V1=VDD/0 V
0.4
10/-10 µA
-
10
pF
20
-
4/5 VDD
-
V
1/5 VDD
-
-
1/-1 µA
10/-10
STD.P
Input other than
D0 to D3
D0 to D3, STD.P
CS1
Input other than
D0 to D3
D0 to D3
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