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RV5C386A-E2

I2C-Bus Real-Time Clock ICs with Voltage Monitoring Function

RICOH Co.,Ltd. 

PRELIMINARY

RV5C386A

5. PIN DESCRIPTION

Symbol

SCL

SDA

/INTRA

/INTRB

32KOUT

CLKC

OSCIN

OSCOUT

VDD

VSS

Item

Description

Serial

The SCL pin is used to input clock pulses synchronizing the input and output

Clock Line

of data to and from the SDA pin. Allows a maximum input voltage of 5.5

volts regardless of supply voltage.

Serial

The SDA pin is used to input or output data intended for writing or reading in

Data Line

synchronization with the SCL pin. Up to 5.5v beyond VDD may be input.

This pin functions as an Nch open drain output.

Interrupt

The /INTRA pin is used to output periodic interrupt signals to the CPU and

Output A

alarm interrupt (Alarm_D) signals. Disabled at power-on from 0 volts. Nch.

open drain output.

Interrupt

The /INTRB pin is used to output alarm interrupt (Alarrm_W) signals to the

Output B

CPU. Disabled at power-on from 0 volts. Nch. open drain output.

32kHz Clock The 32KOUT pin is used to output 32.768-kHz clock pulses. Enabled at

Output

power-on from 0 volts. CMOS output. The output is disabled if the CLKC pin

is set to Low or open.

Clock control The CLKC pin is used to control output of the 32KOUT pin. The clock output

input

is disabled and held low when the pin is set to low or open. Incorporates a

pull-down resistor.

Oscillation

The OSCIN and OSCOUT pins are used to connect the 32.768-kHz crystal

Circuit

oscillator (with all other oscillation circuit components built into the

Input / Output RV5C386A).

Positive Power The VDD pin is connected to the power supply.

Supply Input

Negative Power The VSS pin is grounded.

Supply Input

6. ABSOLUTE MAXIMUM RATINGS

Symbol

VDD

VI

VO

PD

Topt

Tstg

Item

Supply Voltage

Input Voltage

Output Voltage 1

Output Voltage 1

Power Dissipation

Operating Temperature

Storage Temperature

Pin Name

SCL, SDA, CLKC

SDA, /INTRA, /INTRB

32KOUT

Topt = 25°C

Description

-0.3 to +6.5

-0.3 to +6.5

-0.3 to +6.5

-0.3 to VDD+0.3

300

-40 to +85

-55 to +125

(VSS=0V)

Unit

V

V

V

V

mW

°C

°C

7. RECOMMENDED OPERATING CONDITIONS

Symbol

VDD

VCLK

fXT

VPUP

Item

Supply Voltage

Timekeeping Voltage

Oscillation Frequency

Pull-up Voltage

Pin Name

SCL, SDA, /INTRA,

/INTRB

(VSS=0V, Topt=-40 to +85°C)

Min, Typ. Max. Unit

2.0

5.5

V

1.45

5.5

V

32.768

kHz

5.5

V

12345

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