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PDF M62X42B Data sheet ( Hoja de datos )
| Número de pieza | M62X42B | |
| Descripción | MSM62X42B | |
| Fabricantes | OKI electronic componets | |
| Logotipo |  |
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¡¡SemicondSucetormiconductor
MSM62X42B
MSM62X42B
REAL TIME CLOCK IC WITH BUILT-IN CRYSTAL
www.DataSheet4U.com
DESCRIPTION
The MSM62X42B is a bus-connection Micro-
computer peripheral IC of a Real Time Clock
with built-in crystal in the perpetual calendar
which can be read and written from a second
unit. The interface between this IC and a
microcomputer uses 4 data buses, 4 address
buses, 3 control buses and 2 chip selects and
carries out setting up, amending and reading
time.
ALE input is available for 8048 system, 8051
system or 8085 system and is used for other
microcomputers if this input is fixed at "H".
The clock function provides seconds, min-
utes, hours, day of week, date, month, year,
12/24 hour selectable, automatic leap year in
the Christian Era and 30-second compensa-
tion controlled by software. The periodical
interrupt function (or periodical waveform
output) and the STOP/START function of the
clock are also provided. The device is a silicon
gate CMOS and the current consumption is
low. The built-in crystal oscillator is 32.768
kHz and battery backup operation is consid-
ered.
FEATURES
• 32.768kHz built-in crystal oscillator
(2 ranks of ±10PPM and ±50PPM ---
DIP)
(2 ranks of ±20PPM and ±50PPM ---
SOP)
• Real time clock of second, minute, date,
month, year and day of week
• Interface corresponding to microcom-
puter bus
• 30-second compensation controlled by
software
• Periodical interrupt function (or
periodical waveform output) for alarm
• STOP/START function for clock
• 12/24 hour selectable
• AEL input for 8048 system, 8051 system
or 8085 system (when a microcomputer
does not provide the ALE output, fix the
AEL input at "H".)
• Low current consumption for CMOS
device
• Low STANDBY voltage and small
STANDBY current
• 18-pin plastic DIP(DIP18-P-300)
• 24-pin plastic SOP
PIN CONFIGURATION
MSM62X42BRS
(TOP View) 18 Lead Plastic DIP
MSM62X42BGS-1K
(TOP View) 24 Lead Plastic SOP
STD.P 1
CS0 2
ALE 3
A0 4
A1 5
A2 6
A3 7
RD 8
GND 9
18 VDD
17 (VDD)
16 (VDD)
15 CS1
14 D0
13 D1
12 D2
11 D3
10 WR
STD.P
CS0
NC
ALE
A0
NC
A1
NC
A2
A3
RD
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
NC : NO CONNECTION (unused pins)
Note: The actual type name indicates the abbreviated one, M62X42B.
VDD
(VDD)
(VDD)
NC
CS1
D0
NC
NC
D1
D2
D3
WR
41
1 page  
¡ Semiconductor
MSM62X42B
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
www.DaPtaarSahmeeett4eUr .com
Power supply voltage
Input voltage VI
Output voltage Vo
Storage temperature
Symbol
VDD
TSTG
Conditions
Ta = 25°
—
Soldering conditions (lead)
TSOL
—
Rating
– 0.3 to 7
-03 to VDD +0.3
-03 to VDD +0.3
–55 to +85
Temp.:under 260°C
Time :within 10 seconds
Unit
V
V
V
°C
Operating Conditions
Parameter
Symbol Conditions
Rating
Unit
Power supply voltage
VDD —
4.5 to 5.5
V
Time Recording Supply Voltage
VCLK
—
2.0 to 5.5
V
Crystal Frequency
f(XT) —
32.768
kHz
Operating Temperature
TOP —
–40 to +85
°C
Note: Time Recording Supply Voltage: Power supply voltage to guarantee a crystal oscillator and time recording
Frequency Accuracy
Item
Frequency stability
Rank A
Rank S
Rank B
Temperature Characteristics
OCS starting time
Frequency Drift
Conditions
Ta = 25°C
VDD = 5V
–10 to +70°C (25°C standard)
–40 to +85°C ( ´´
)
At 4.5V, let "t" make "0"
Ta=25°C, VDD = 5V
First year
Rating
± 10
± 20
± 50
+10/ –120
+10/ –220
MAX 1
±5
Voltage characteristics
Ta=25°C
VDD = 4.5~5.5V
* Rank A : 18pin DIP only
Rank S : 24pin SOP only
Rank B : 18pin DIP, 24pin SOP
±5
Unit
PPM
PPM
Sec.
PPM/year
PPM/V
45
5 Page 
¡ Semiconductor
MSM62X42B
PIN DESCRIPTION
D0 to D3 (Data buses 0 to 3)
Data input/output pins to be directly connected to a microcomputer data bus for reading
awnwdww.DriattianSghoefetth4Ue .rceogmister controlled by the microcomputer. The interface serves as positive
logic and CS0=L, 1=H, RD=L, and as output mode when WR=H. It becomes high impedance
except these cases.
A0 to A3 (Address buses 0 to 3)
These are input pins to be directly connected to a microcomputer address bus for register
assignment which is read and written by a microcomputer. These address data are used in
combination with ALE for addressing registers.
ALE (Address Latch Enable)
This is an input pin to read address data and CS0.
The address bus andCS0 are read into a IC when ALE="H". The address data in the case of
ALE=L in the IC is held. CS1 functions to ALE independently.
When the microcomputer of MSC-48, 51 or 80 system having an ALE output is used, this pin
is connected to the ALE output of the microcomputer. When 4 Bits of A0 to A3 in a 4 Bit
microcomputer are commonly used with an another peripheral IC. When the microcom-
puter does not have the ALE output, the ALE input of this IC is fixed to "H".
WR (WRITE)
This is a input pin for which the data is written into this IC by a microcomputer. When
CS1=H, D0 ~ D3 data are written into the designated registers by A0 to A3 and ALE at the
rising edge of WR.
RD (READ)
This is an input pin to read this IC data by a microcomputer. When CS1=H, RD outputs the
register data designated by A0 to A3 and ALE during "L". If both WR and RD are set at "L",
this should be inhibited because it becomes the cause for malfunction.
CS0, CS1(Chip Select 0•1)
These pins enable/disable ALE, RD and WR operation, when CS1=H at CS0=L, these pins
become effective. In other combination except this, the pins become equivalent to ALE=L
and WR=RD=H unconditionally in the IC internal. However, CS0 needs operation related
with ALE, while CS1 works independently to ALE. CS1 must be connected to the power
supply voltage detector. Refer to the item, “CS1 of APPLICATION NOTE”.
STD • P (STANDRD Pulse)
Output pin of N-CH OPEN DRAIN type. The output data is controlled by the D1 data
content of CE register. This pin has a priority to CS0 and CS1. Refer to the item "CE REGISTER
FOR FUNCTIONAL DESCRIPTION OF REGISTERS".
VDD
N-CH
STD.P Output
51
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| PDF Descargar | [ Datasheet M62X42B.PDF ] | |
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