Contents
Features.............................................................. 1
Applications......................................................... 1
Block Diagram..................................................... 1
Pin Assignment ................................................... 1
Pin Function ........................................................ 2
Command Configuration ..................................... 2
Data Configuration .............................................. 3
Ordering Information ........................................... 3
Absolute Maximum Ratings................................. 3
Recommended Operating Conditions ................. 4
DC Characteristics .............................................. 4
Oscillation Characteristics ................................... 5
AC Characteristics 1 (S-3510ANFJX,
S-3510AEFJX, RL1=30 kW, CL1=50 pF) ............ 6
AC Characteristics 2 (S-3510ACFJX,
S-3510ADFJX, CL1=50 pF) ................................ 6
AC Characteristics 3 (S-3510ACFJX,
S-3510ADFJX, CL1=50 pF) ................................ 6
Timing Charts...................................................... 7
Operation ............................................................ 8
Application Circuit Examples ............................... 13
Dimensions ......................................................... 14
Taping Specifications .......................................... 15
Precautions ......................................................... 16
Characteristics .................................................... 17
REAL-TIME CLOCK
S-3510 Series
The S-3510 is a series of CMOS real-time clock ICs that inputs/ outputs
serial clock or calendar data into/from the CPU.
n
Features
·
Operating power supply:
1.7 V to 5.5 V
·
Low current consumption: 1.2
µ
A typ. at 3.0 V
·
BCD output of second, minute, hour, day, date, month and
year
n
Applications
·
Video cameras
·
FAXes
·
Cellular phones
·
Printers
·
Easy serial interface to CPU with 3 lines (SIO, SCK, and CS)
·
Built-in automatic calendar
·
Built-in voltage detector
·
Built-in constant voltage circuit
·
Built-in oscillation circuit (Cg and Cd are built in)
·
8-pin SOP
n
Block Diagram
X
IN
X
OUT
TP
OU
OSC
&
Divider
Counter
Sec.
Min.
Hr.
Day
Date
Mon.
Year
Sec.
Min.
Hr.
Day
Date
Mon.
Year
SIO
Shift Register
V
DD
Voltage
Detector
Status Register
V
SS
Serial Interface
&
Controller
SCK
CS
Figure 1
n
Pin Assignment
TP
OU
X
OUT
X
IN
V
SS
1
2
3
4
8
7
6
5
V
DD
SIO
SCK
CS
Figure 2
Seiko Instruments Inc.
1
REAL-TIME CLOCK
S-3510 Series
Pin Function
Table 1
No.
1
2
3
4
Name
TP
OUT
X
OUT
X
IN
V
SS
Function
Standard signal output (Nch open-drain output)
Connects to the X’ftal resonator (f=32768 Hz)
[Cg and Cd are built in]
Power supply (GND)
Chip select input (Built-in pull-down resistance)
“H”:The SIO pin is capable of inputting/outputting data.
The SCK pin is capable of accepting the input.
“L”: The SIO pin is at Hi-Z.
The SCK pin is not capable of accepting the input.
Clock input:
Inputs and outputs data from the SIO pin in synchronization with the clock. The
clock cannot be accepted when the CS pin is “L.”
Serial data input/output:
When the CS is “L,” the SIO pin is at “Hi-Z.” When the CS pin changes from “L”
to “H,” it serves as the input pin. The SIO pin is assigned to the input or output pin
according to the next command data. The type of output is either Nch open-drain
or CMOS depending upon the model of the IC you use.
Positive power supply
5
CS
6
SCK
7
SIO
8
V
DD
Command Configuration
Table 2
Command
READ 1(Data Read)
READ 2(Data Read)
WRITE 1(Data Write)
WRITE 2(Data Write)
STATUS WRITE
RESET
TEST START
TEST END
Code
1 1 1 0
1 1 1 1
1 0 0 1
1 0 0 0
1 0 1 1 D3 D2 D1 D0
1 0 1 0 1 0 1 0
1 1 0 1 0 1 0 1
1 1 0 1 1 0 1 0
Note
Output from the year data
Output from the day data
Input from the year data
Input from the day data
Status write
Initialization
Test mode start
Test mode end
2
Seiko Instruments Inc.
REAL-TIME CLOCK
S-3510 Series
n
Data Configuration
The S-3510 series is provided with a timer data BCD (Binary Coded Decimal) display
(
*) device and an
automatic calendar
.
A set of flags are configured as follows:
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
Year data (0 to 99)
Month data (1
to
0
0
0
M4
M3
M2
M1
M0
0
0
D5
D4
D3
D2
D1
D0
Date data (1 to 31)
Status and day data (1 to 7)
Hour data (0 to 23 or 0 to 11) and flags
W2
W1
W0
0
H5
H4
H3
H2
H1
H0
m6
m5
m4
m3
m2
m1
m0
Minute data (0 to 59) and flags
S6
S5
S4
S3
S2
S1
S0
Second data (0 to 59) and flags
( * ) Notes AM /PM Flag:
When writing in 12-hour display mode, always input 0 for AM and 1 for PM. In 24-hour display
mode, it is unnecessary as both 1 and 0 are ignorged. However, when reading the time in either
display mode0 is read as AM 1 as PM.
When a decrease in the voltage is detected, it is set to 1. This is valid during reading; and is
invalid during writing.
1 is set at the power ON, and cleared through the RESET command. This flag is ingored during
writing.
When the test mode is set, it is set to 1. When the bit is 1, ALWAYS USE the TEST END or
RESET command to set to 0. This bit is valid for reading and ignored during writing.
BLD Flag:
POW Flag:
TEST Flag:
n
Ordering Information
Table 3
Model No.
S-3510ANFJX
S-3510ACFJX
S-3510ADFJX
S-3510AEFJX
SIO output
Nch open-drain
CMOS
CMOS
Nch open-drain
TP
OUT
output
Selection of 1H
Z
/32768H
Z
by command
Selection of 1H
Z
/32768H
Z
by command
32768H
Z
32768H
Z
Oscillation circuit capacity
Internal Cg,Cd
Internal Cg,Cd
External Cg, Internal Cd
Internal Cg, Cd
Note
Under mass
production
Under mass
production
Under
development
Under
development
* X differs depending on the package type : A : A type, (blank) : B type
n
Absolute Maximum Ratings
Table 4
Ta=25
°C
V
SS
=0 V
Parameter
Power supply voltage
Input voltage
Output voltage
Operating temperature
Storage temperature
Symbol
V
DD
V
IN1
V
IN2
V
OUT
Topr
Tstg
Conditions
Ratings
-0.3 to +7.0
Unit
V
V
V
V
°
C
°
C
SCK, CS, SIO
SIO (CMOS output)
TP
OUT
, SIO
V
DD
=3.0 V
-0.3 to +7.0
-0.3 to V
DD
+0.3
-0.3 to +7.0
-30 to +80
-55 to +125
Seiko Instruments Inc.
3
REAL-TIME CLOCK
S-3510 Series
n
Recommended Operating Conditions
Table 5
Parameter
Power supply voltage
Operating temperature
Symbol
V
DD
Topr
Min.
1.7
-20
Typ.
3.0
Max.
5.5
+70
Unit
V
°
C
n
DC Characteristics
Table
6
Unless otherwise specified,
Parameter
Ta=25
°C,V
DD
=3.0 V, X tal resonator: Seiko Instruments Inc., DS-VT-200 (R
1
=30 kΩ, C
L
=6 pF, 32768 Hz)
Symb.
V
DD
I
DD1
I
DD2
I
IHL1
I
IHL2
I
ILL
I
IH2
I
IH3
V
IH
V
IL
I
OL1
I
OL2
I
OH2
V
DET
I
BLD
Conditions
Min.
Standard
Typ.
3.0
1.2
10
30
10
100
Unit
Max.
5.5
2.0
30
60
0.5
0.5
0.5
30
300
Note
Operating voltage
range
Power current
consumption
Ta=-20
°
C to +70
°
C
CS=0 V
S-3510ANFJX, S-3510AEFJX
S-3510ACFJX, S-3510ADFJX
V
IN
=5.5 V
V
IN
=V
DD
V
IN
=0 V
V
IN
=5.5 V
V
IN
=0.4 V
1.7
V
µ
A
µ
A
µ
A
µ
A
µ
A
µ
A
µ
A
µ
A
1
2
3,11
3,12
4
5
6
7
7
Input leak current
Input current
Input voltage
-0.5
-0.5
-0.5
30
0.8
×
V
DD
200
500
1.8
1.72
Output current
Voltage detection
voltage
BLD current
consumption
V
IN
=0.4 V
V
IN
=0.4 V
V
IN
=2.6 V
Ta=-20
°
C to +70
°
C
Ta=-20
°
C to +70
°
C
2.0
0.2
×
V
DD
-500
2.2
2.3
1.0
V
V
µ
A
µ
A
µ
A
V
V
µ
A
8
9
10
0.3
13
Note 1
Note 2
Note 3
Communications when
SCK=100 kHz
No output load,
communication inhibit
The current which flows
through the CS is not
included, no output load
Applied to the SIO, SCK of
the S-3510ANFJX, the S-
3510AEFJX
Note 5
Note 6
Note 7
Note 8
Note 9
Applied to the SIO, SCK of the S-
3510ACFJX, the S-3510ADFJX
Applied to the SIO, SCK, CS
Applied to the CS
Applied to the TP
OUT
Applied to the SIO
Note 10 Applied to the SIO of the S-
3510ACFJX, the S-3510ADFJX
Note 11 Communications when SCK=100
kHz
Note 12 Communications when SCK=500
kHz
Note 13 The value of the current which flows
through the voltage detector when it
starts to function
Note 4
4
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