M6242B Datasheet PDF - OKI
| Part Number | M6242B | |
| Description | MSM6242B | |
| Manufacturers | OKI | |
| Logo |  |
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¡¡SemicondSucetormiconductor
MSM6242B
MSM6242B
DIRECT BUS CONNECTED CMOS REAL TIME CLOCK/CALENDAR
DESCRIPTION
The MSM6242B is a silicon gate CMOS Real
Time Clock/Calendar for use in direct bus-
connection Microprocessor/Microcomputer
applications. An on-chip 32.768 KHz crystal
oscillator time base is divided to provide ad-
dressable 4-bit I/O data for SECONDS,
MINUTES, HOURS, DAY OF WEEK, DATE,
MONTH and YEAR. Data access is controlled
by 4-bit address, chip selects (CSO, CS1),
WRITE, READ, and ALE. Control Registers
www.DataShDe,etE4Ua.ncodmF provide for 30 SECOND error
adjustment, INTERRUPT REQUEST (IRQ
FLAG) and BUSY status bits, clock STOP,
HOLD, and RESET FLAG bits, 4 selectable
INTERRUPTS rates are available at the STD.P
(STANDARD PULSE) output utilizing Con-
trol Register inputs T0, T1 and the ITRPT/
STND (INTERRUPT/STANDARD). Mask-
ing of the interrupt output (STD.P) can be
accomplished via the MASK bit. The
MSM6242B can operate in a 12/24 hour for-
mat and Leap Year timing is automatic.
The MSM6242B normally operates from a 5V
±10% supply at –40 to 85°C. Battery backup
operation down to 2.0V allows continuation
of time keeping when main power is off. The
MSM6242B is offered in a 18-pin plastic DIP
and a 24-pin plastic Small Outline package.
FEATURES
DIRECT MICROPROCESSOR/MICROCONTROLLER BUS CONNECTION
TIME
MONTH DATE YEAR
DAY OF WEEK
23:59:59
12 31 80
7
• 4-bit data bus
• 4-bit address bus
• READ, WRITE, ALE and CHIP SELECT
INPUTS
• Status registers – IRQ and BUSY
• Selectable interrupt outputs – 1/64
second, 1 second, 1 minute, 1 hour
• Interrupt masking
• 32.768 KHz crystal controlled operation
• 12/24 hour format
• Auto leap year
• ±30 second error correction
• Single 5V supply
• Battery backup down to VDD = 2.0V
• Low power dissipation:
20µW max at VDD = 2V
150µW max at VDD = 5V
• 18 pin Plastic DIP (DIP18-P-300)
• 24 Pin-V Plastic SOP (SOP24-P-430-VK)
23
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¡ Semiconductor
ABSOLUTE MAXIMUM RATINGS
Parameter
Power Supply Voltage
Input Voltage
Output Voltage
Storage Temperature
Symbol
VDD
VI
VO
TSTG
Condition
Ta = 25°C
MSM6242B
Rating
-0. 3 to 7
-0.3 to VDD +0.3
-0.3 to VDD +0.3
-55 to +150
Unit
V
V
V
°C
OPERATING CONDITIONS
Parameter
Power Supply Voltage
www.DataSheeSt4taUn.dcboymSupply Voltage
Crystal Frequency
Operating Temperature
Symbol
VDD
VBAK
f(XT)
TOP
Condition
—
—
—
—
Rating
4 to 6
2 to 6
32.768
-40 to +85
Unit
V
kHz
°C
D.C. Characteristics
Parameter Symbol
"H" Input Voltage
"L" Input Voltage
VIH1
VIL1
Condition
—
—
Min.
2.2
—
Typ.
—
—
Input Leak Current ILK1
VI = VDD/0V
—
Input Leak Current
"L" Output Voltage
"H" Output Voltage
"L" Output Voltage
ILK2
VOL1
VOH
VOL2
OFF Leak Current IOFFLK
Input Capacitance CI
Current Con-
sumption
Current Con-
sumption
"H" Input Voltage
"L" Input Voltage
IDD1
IDD2
VIH2
VIL2
IOL = 2.5mA
IOH = -400µA
IOL = 2.5mA
V = VDD/0V
Input frequency
1MHz
f(xt) =
32.768
KHz
CS1 ~~ 0
VDD =
5V
VDD =
2V
VDD = 2 ~ 5.5V
—
—
2.4
—
—
—
—
—
4/5VDD
—
—
—
—
—
—
—
5
—
—
—
—
(VDD = 5V ± 10%, TA = -40 ~ +85)
Applicable
Max. Unit
Terminal
— V All input termin-
0.8 als except CS1, XT
Input terminals
1/-1 other than
µA D0 ~ D3, XT
10/-10
0.4
—
0.4
10
—
V
V
µA
PF
30
µA
10
D0 ~ D3
D0 ~ D3
STD.P
All input
terminals
VDD
—
1/5VDD
V
CS1
27
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| Information | Total 18 Pages | |
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| Download | [ M6242B.PDF Datasheet ] | |
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