Epson RTC-58321, RTC-58323 Datasheet

73

Real time clock module

Absolute Max. rating

Specifications (characteristics)

Operating range

Frequency characteristics and current consumption
characteristics

DC characteristics

External dimensions

(Unit: mm)

NC is not connected internally.

Terminal connection

0.2

1.0

0.351.27

0.5

2.54

No.

1
2
3
4
5
6
7
8

9
10
11
12
13

14 to 15

16

No.

1 to 4

5
6
7
8

9
10
11
12
13
14
15
16
17

18 to 24

58321

CS

2

WRITE

READ

D

0

D1
D2
D3

GND

ADDRESS WRITE

BUSY
STOP

TEST

CS

1

N.C
V

DD

58323

N.C
CS

2

WRITE

READ

D

0

D1
D2
D3

GND

ADDRESS WRITE

BUSY
STOP

TEST

CS

1

VDD

RTC58323 A
EPSON 3050B

0.25

6.65

4

.5 Max.

2.8 Max. 12.2 Max.

7.9

3.0 Min.

0.05 Min.

0.1 Min.

90° to
105°

7.62

20.5 Max.

16.3 Max.

17.78

RTC-58323

RTC-58323

RTC-58321

RTC-58321

24 23 22 21 20 19 18 17 16 15 14 13

123456789

10 11 12

87654321

910111213141516

0° to
10°

4162CEPSON

RTC58321 B

4-bit I/ O CONNECTION REAL TIME CLOCK MODULE

RTC-58321/58323

•

Built-in crystal unit allows adjustment-free efficient operation.

•

Incorporating time counter (hour, minute, sec.) and calendar counter

(year, month, day of week).

•

Either 12 h or 24 h selectable and leap year automatically adjustable.

•

Standard signal output selectable among a choice of 1024 Hz, 1 sec., 60

sec., and 1 hour.

•

Provided with counter start, stop and reset functions.

•

Data transmission is by 4-bit bidirectional bus line and memory read and

write method.

•

Low current consumption and backup function provided.

Item

Power source voltage

Input and output voltage

storage temperature

Soldering condition

Symbol

V

DD

VI/O

TSTG

TSOL

Condition

Ta=+25 °C

—

RTC-58321

RTC-58323

Specifications

-0.3 to 6.5

-0.3 to VDD+0.3

-55 to +85

Unit

V

°C

Under +260 °C within 10 s
(lead part) (package should
be less than +150 °C)

Twice at under +260 °C within
10 s or under +230 °C within 3
min.

Item

Operating voltage

Operating temperature

Data holding voltage

CSI data holding time

Operation restoring time

Symbol

V

DD

TOPR

V

DH

tCDR

tR

Condition

—

RTC-58321

RTC-58323

—

Refer to the data

holding timing

Specifications

4.5 to 5.5

-10 to +70

-30 to +85

2.2 to 5.5

0 Min.

Unit

V

°C

V

µs

Item

Frequency tolerance

Frequency temperature
characteristics

Aging

Shock resistance

Current consumption

Symbol

∆f/fo

—

fa

S.R.

I

DD 1

IDD 2

Condition

Ta=+25 °C

V

DD=5 V

58321 A
58321 B

58323

-10 °C to +70 °C

(+25 °C reference temperature)

VDD=5 V, Ta=+25 °C, first year

Three drops on a hard board from 750
mm or 29400 m/s2x 0.3 ms x 1/2 sine
wave x 3 directions

VDD=5 V, CS1=0 V

V

DD=3 V, CS1=0 V

Specifications

±10

±50

5±20

+10/-120

±5 Max.

±10 Max.

40 Max.

20 Max.

Unit

x 10

-6

x 10-6/year

x 10

-6

µA

Item

“H” input voltage

“H” input voltage

“L” input voltage

“L” output voltage

“L” output current

“H” input current

“L” input current

Input leak current

Input off leak current

Input capacity

Oscillation star t-up time

Symbol

VIH1

VIH2

VIL

V

OL

IOL

IIH

IIL

ILIH

ILIL

C1

tOSC

Condition

—

I

OL=1.6 mA

V

O=0.4 V

V

1=5 V

V

1=0 V

V

1=5 V

V1=0 V

Input

frequency 1 MHz

VDD=5 V

Ta=+25 °C

Min.

3.6

VDD-0.5

—

1.6

10

—

Typ.

—

—

30

—

5

1.5

Max.

—

0.8

0.4

—

80

-1

1

-1

—

3.0

Unit

V

mA

µA

pF

s

Applicable

terminal

Input other

than CS

1

CS1

—

Input other

than D

0 to D3

D0 to D3

—

Busy output

Unless otherwise stated, characteristics (specifications) shown in the above
table are based on the rated operating temperature and voltage condition.

Actual size

74

Real time clock module

Switching characteristics

Write & read mode

Supplement Register table

CS1

CS2

tCS tAS tAW tAH tDS tWW tDH tRI tRA

tDD

DATA VALID

DATA INVALID

tCH

ADDRESS
WRITE

D

0 - D3

Write and read timing

Date holding timing

4.5 V 4.5 V

2.2 to 4.5 V

Data holding mode

CS

2 or WR not occurred

CS1 ≤ 0.8 V

0 µs Min. 0 µs Min.

t

CDR tR

VIL VIL

VIH2 VIH2

CS1

VDD

Interface
possible with
the external
terminals

Interface
possible with
the external
terminals

WRITE

WRITE READ

READ

DATA

(V

DD=5 V ±0.5 V Ta=+25 °C)

DATAADDRESS

Block diagram

OSC

TRI-STATE
CONTROL

SWITCH

DATA BUS

1024 Hz

1/2

Reg

1/3600 Hz

ADDRESS
LATCH

D

BUSY

Reg

BUSY

STOP

TEST

READ

CS

1

RP

Crystal oscillator circuit

32.768 kHz

RP

RP

RP

RP

RP

RP

CS2

D0
D1
D2
D3

ADDRESS

WRITE

WRITE

1/10

sec.

1/6 1/10

minute

1/6 1/10

day

1/3 1/10

year

1/101/12

month

1/12

hour

or

1/24

1/7
day

of

week

D10

A0

0

S1

S1

S10

S10

1/60 Hz1 Hz

1 Hz

1024 Hz

MI1

MI1 M1

TEST

WRITE

MI10
H

1

H110

H

10

H10

W

W

D1

D1

D10

D10

MO1

MO1

MO10

MOI0

Y1

Y1

Y10

Y10

D
E to F

1
2
3
4
5
6
7
8
9
A
B
C

D

A1
A2
A3

D11
D12
D13

E to F

E to F

=200 kΩ (Typ.)∗

Address

Item
∗ mark
24/12
PM/AM

D

3 and D2 of

10 days digit

Reset register

Standard
signal register

Description

Writable. Recognized as 0 while in read mode

“1” =24 h mode,“0” =12 h mode
“1” =PM, “0” =AM. In 24 h mode, this will be “0”

Used to select leap year. Calculated according to the surplus

Calendar

Gregorian calendar

Spare

D

3

0

1

D

2

0
1
0
1

Surplus after dividing
10 year digit by 4

0
3
2
1

Example of leap year

96, 00

These selections are for resetting 5-stage and the busy circuit after 1/215frequency stage.
Resetting is activated by latching this code on to the address latch and setting WRITE=H

By latching this code to the address latch and setting READ to H, the standard
signals will be output at D

0 to D

3

Note: • Do not enter erroneous data for clock.

• This may result in time keeping error.

• Do not change STOP more than once while in BUSY mode.

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

D

3

A3

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

D

2

A2

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

D

1

A1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

D

0

A0

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

Name of
register

S1

S

10

MI1

MI10

H1

H10

W

D

1

D10

MO1

MO

10

Y1

Y10

—

—

D

3

S

8

∗

mi

8

∗

h

8

24/12

∗

d

8

mo8

y8

y80

1 hour

Leap year selection

D2

S

4

S40

mi4

mi40

h4

PM/AM

W

4

d

4

mo

4

y

4

y40

1 min.

D1

S

2

S20

mi2

mi20

h2

h20

W

2

d2

d20

mo2

y2

y20

1 sec.

D

0

S

1

S10

mi1

mi10

h1

h10

W

1

d1

d10

mo1

mo10

y1

y10

1024 Hz

Count

0 to 9

0 to 5

0 to 9

0 to 5

0 to 9

0 to 2

or

0 to 1

0 to 6

0 to 9

0 to 3

0 to 9

0 to 1

0 to 9

Note

1- sec. digit register

10 - sec. digit register

1 - min. digit register

10 - min. digit register

1 - hour digit register

10 - hour digit register

Week register

1 - day digit register

10 - day digit register

1- month digit register

10-month digit register

1

-

year digit register

10

-

year digit register

Reset register

Standard signal register

0== “L” level 1== “H” level

Item

CS setup time

Address setup time

Address write pulse width

Address hold time

Data setup time

Write pulse width

Data hold time

Read inhibit time

Read access time

Read delay time

CS hold time

Symbol

t

CS

tAS

tAW

tAM

tDS

t

WW

tCH

tRI

tRA

tDD

t

CH

Condition

—

Min.

0

0.5

0.1

0

2

0

—

0

Typ.

—

Max.

—

∗1

1

—

Unit.

µs

(VDD=5 V±0.5 V)

∗

1 tRA=1 µs+C x R x In [VDD/(VDD-VH)]

C: Data line capacity
R: Pull-up resistance
V

H: “

H” input voltage connected to the data line

In: Natural logarithm

after dividing
10 year digit
by 4

∗

∗