New Product

Preliminary

2002.8 Ver.0.1

4-wire serial interface high-stability RTC module

Preliminary

Product number:Q4140455xxxxx00

• Built in frequency adjusted 32.768 kHz crystal unit.

• Serial interface which can be controlled by 4 or 3 signal lines.

• Dual Alarm and Timer IRQ function are Available.

• 32.768 kHz clock frequency output. (FOUT)

• Low backup current : 0.48 µA / 3 V ( Typ.)

• Wide operating voltage range : 1.7 V to 5.5 V Wide timekeeper voltage range : 1.15 V to 5.5 V

• Available as small package.( SOP-14pin )

s Block Diagram

OSC

OSC

Detect

/ INT

CLK

CE

FOUT

32 kHz

Output

Control

Divider

Correc

-tion

Div.

Interrupt Control

Shift Register

Time Counter

( Sec,Min,Hour,Week,Day,Month,Year )

Address

Decoder

Address

Register

Comparator_D

Comparator_W

Alarm_W Register

( Min,Hour,Week )

I/O

Control

Alarm_D Register

( Min,Hour )

Voltage

Detect

GND

DI

DO

s Pin Assignment

s Pin Descriptions

# 7

# 1

# 8

#14

1. N.C.

2. CLK

3. FOUT

4. N.C.

5. TEST

7. CE

14. N.C.

13. DO

12. DI

11. GND

10. /INT

9. N.C.

8. N.C.

Pin Assignment

5.0

10.1

3.2

7.4

0.35

1.27

RX - 4045 SA

Terminal

Pin No.

Descriptions

CLK

2

Serial clock input

FOUT

3

32.768 kHz output

(Nch open drain)

TEST

5

TEST terminal

6

VDD

CE

7

Chip enable

/INT

10

Interrupt output

(Nch open drain)

GND

11

GND

DI

12

Data input

DO

13

Data output