RS5C348A datasheet(8/53 Pages) RICOH

Part #	RS5C348A

Description	4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION?

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Manufacturer	RICOH [RICOH electronics devices division]

Direct Link	http://www.ricoh.com

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8 / 53 page

5

R

×5C348A/B

DC ELECTRICAL CHARACTERISTICS

Symbol

Item

Pin name

Conditions

MIN.

TYP.

MAX.

Unit

VIH

“H” Input Voltage

SCLK,CE, SI

VDD=2.5 to 5.5V

0.8VDD

5.5

V

VIL

“L” Input Voltage

–0.3

0.2VDD

IOH

“H” Output Current

SO

VOH=VDD–0.5V

–0.5

IOL1

“L” Output Current

INTR, 32KOUT(R

×5C348A)

VOL=0.4V

2

mA

IOL2

SO,32KOUT(R

×5C348B)

0.5

IIL

Input Leakage Current SCLK, SI

VI=5.5V or Vss

–1

1

µA

VDD=5.5V

RDNCE

Pull-down Resistance

CE

40

120

400

k

Ω

IOZ1

Output Off-state

SO

Vo=5.5V or Vss

–1

1

µA

Leakage Current

VDD=5.5V

IOZ2

32KOUT, INTR

VO=5.5V

–1

1

IDD

VDD=3V,CE=OPEN

(R

×5C348A)

VDD

Output=OPEN

0.35

0.8

Standby Current

32KOUT=Off mode*1

µA

IDD

VDD=3V,CE=OPEN

(R

×5C348B)

VDD

Output=OPEN

0.55

1.0

32KOUT=On mode

VDETH

Supply Voltage Monitoring

VDD

Topt=–30 to +70˚C

1.90

2.10

2.30

V

Voltage (“H”)

VDETL

Supply Voltage Monitoring

VDD

Topt=–30 to +70˚C

1.45

1.60

1.80

V

Voltage (“L”)

CG

Internal Oscillation Capacitance 1 OSCIN

12

pF

CD

Internal Oscillation Capacitance 2 OSCOUT

12

Unless otherwise specified : Vss=0V,VDD=3V,Topt=–40 to +85˚C

*1) For standby current for outputting 32.768-kHz clock pulses from the 32KOUT pin, see “USAGES, 7. Typical Characteristics”.

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RS5C348A Datasheet(PDF) 8 Page - RICOH electronics devices division

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