CF5705 series
NIPPON PRECISION CIRCUITS INC.--1
Analog Watch Stepping Motor Driver
OVERVIEW
The CF5705 series are low-current analog watch stepping motor driver CMOS ICs with built-in 32.768 kHz
crystal oscillator circuit.
FEATURES
I
32.768 kHz crystal oscillator circuit
C
G
and C
D
built-in
I
-
3.6 to
-
1.2 V operating supply voltage range
I
Operating current consumption
V
SS
= 1.55V, C
D
= 16pF: 250 nA (max)
V
SS
= 2.8V, C
D
= 26pF: 1000 nA (max)
Note: Current consumption depends on the built-in capacitor.
I
Reset function
4 Hz and subsequent frequency dividers are reset
SERIES LINEUP
PART NUMBER GUIDE
ORDERING INFORMATION
Version
Pad coordinates
Motor
Built-in
capacitor
1
1. Parasitic capacitance is included. Parasitic capacitance: C
G
= C
D
= 4pF
1
2
3
4
5
6
7
8
Cycle
(Tcy/2)
[sec]
Pulse
(Tpw)
[sec]
Test
(Tcy)
[sec]
C
G
[pF]
C
D
[pF]
CF5705AA
XT
XTN
RESET
VSS
TEST
OUT2
OUT1
VDD
1
4.9m
125m
4
16
CF5705AD
XT
XTN
RESET
VSS
TEST
OUT2
OUT1
VDD
1
23.4m
125m
4
30
CF5705AE
XT
XTN
RESET
VSS
TEST
OUT2
OUT1
VDD
20
5.9m
125m
4
16
CF5705AK
XT
XTN
RESET
VSS
TEST
OUT2
OUT1
VDD
62.5m
23.4m
125m
4
30
CF5705BC
VSS
RESET
XT
XTN
VDD
OUT2
OUT1
TEST
250m
23.4m
125m
4
26
CF5705BJ
VSS
RESET
XT
XTN
VDD
OUT2
OUT1
TEST
1
23.4m
125m
4
26
CF5705CF
VSS
TEST
XTN
XT
VDD
OUT2
OUT1
RESET
1
4.9m
62.5m
4
16
CF5705CG
VSS
TEST
XTN
XT
VDD
OUT2
OUT1
RESET
1
3.9m
62.5m
4
16
Device
Package
CF5705
Chip form
Function(Motor, Built-in capacitor)
CF5705
Pad coordinate
CF5705 series
NIPPON PRECISION CIRCUITS INC.--2
PAD DIMENSIONS
(Top view)
PAD COORDINATES
BLOCK DIAGRAM
PAD DESCRIPTION
Pin number: Refer to Series lineup.
Chip size: 1.000
1.060 mm
Chip thickness: 220
m
Pad size: 100
100
m
Reverse side: V
DD
level
(0,0)
(1000,1060)
1
NPC
2
3
4
5
6
7
8
HA5705
Number
X (
m)
Y (
m)
1
155
785
2
155
597
3
155
363
4
155
175
5
844
175
6
844
363
7
844
694
8
844
882
XTN
TEST
RESET
XT
OUT2
OUT1
32kHz
Oscillator
Voltage
regulator
Divider and
Output buffer control
Name
Description
VSS
Negative supply voltage
VDD
Positive supply voltage
XT
Crystal oscillator circuit input
XTN
Crystal oscillator circuit output
OUT1
Stepping motor driver output 1
OUT2
Stepping motor driver output 2
RESET
Reset input
TEST
Test mode select. 512 Hz clock output
CF5705 series
NIPPON PRECISION CIRCUITS INC.--3
SPECIFICATIONS
Absolute Maximum Ratings
V
DD
= 0 V
Recommended Operating Conditions
Electrical Characteristics
V
DD
= 0 V, T
a
= 25
C, X'tal C
I
= 55k
max
Parameter
Symbol
Rating
Unit
Supply voltage range
V
SS
-
5.0 to 0.3
V
Input voltage range
V
IN
V
SS
-
0.3 to 0.3
V
Storage temperature range
T
stg
-
40 to 125
C
Parameter
Symbol
Rating
Unit
Supply voltage
V
SS
-
3.6 to
-
1.2
V
Operating temperature
T
opg
-
20 to 75
C
Parameter
Symbol
Condition
Rating
Unit
min
typ
max
Operating supply voltage
V
SS
-
3.6
-
-
1.2
V
Operating current consumption
1
1. Current consumption is measured in the measurement circuit (see next page).
I
DD
No load, V
SS
= 1.55V,
(C
TR
+ C
G
) = 15 pF, C
D
= 16 pF
0.15
0.25
A
No load, V
SS
= 2.8V,
(C
TR
+ C
G
) = 24 pF, C
D
= 26 pF
0.40
1.00
A
Reset input current
I
RST
RESET: V
RST
= V
DD
, V
SS
= 1.55V
6
nA
RESET: V
RST
= V
DD
, V
SS
= 2.8V
25
100
nA
Reset input resistance
R
RST
V
RST
=
-
1.35 V, V
SS
= 1.55V
15
35
60
k
V
RST
=
-
2.6 V, V
SS
= 2.8V
5
15
50
k
Motor output current
I
MOT
R
L
= 2 k
, V
SS
=
-
1.55 V
0.7
mA
R
L
= 1 k
, V
SS
=
-
2.4 V
2.18
2.29
mA
Motor output cycle time
2
(normal mode)
2. Refer to Series lineup.
T
CY
Refer to the SERIES LINEUP
s
Motor output cycle time
2
(test mode)
t
CY
ms
Motor output pulsewidth
2
T
PW
ms
Oscillator start voltage
2
V
STA
-
1.3
V
Oscillator start time
T
STA
From supply ON to 512 Hz output
on TEST
2
5
s
Frequency voltage deviation
f/f
V
SS
=
-
1.2
-
3.6 V, C
TR
= 5 pF
0.2
1
ppm/0.1V
Frequency deviation
3
3.
' = [f (1.55V) f'
0
] / f'
0
(C
D
= 16pF)
' = [f (2.8V) f'
0
] / f'
0
(C
D
= 26pF)
f'
0
: Oscillation frequency center value of Standard Deviation in the same measuring conditions
'
Built-in C
D
8
8
ppm
Built-in C
D
and C
G
16
16
ppm
Internal capacitance
2
C
G
, C
D
(C
G
+ C
D
) < 62 pF
Refer to the SERIES LINEUP
pF
CF5705 series
NIPPON PRECISION CIRCUITS INC.--4
Measurement Circuit
Crystal: f = 32.768 kHz, CI = 20 k
, C0 = 1.3pF, C1 = 2.6fF
XTN
TEST
X'tal
VSS
VDD
RESET
C
TR
XT
OUT2
OUT1
A
C
D
A
I
MOT
R
L
I
RST
CF5705 series
NIPPON PRECISION CIRCUITS INC.--5
FUNCTIONAL DESCRIPTION
Motor Output Waveform
The motor output waveform cycle time and output pulsewidth are set by mask option.
Reset Function
Reset operation
A reset operation occurs when RESET is held HIGH (V
DD
) for a period of 93.75 ms or greater, otherwise the
reset is ignored. When the reset pulse is valid, the 4 Hz and subsequent frequency dividers are reset.
Reset Release
When the reset is released, the first output pulse occurs on the output pin opposite the output pin where the pre-
ceding motor drive output pulse occurred; first pulse occurs on OUT1 if previous motor drive pulse occurred
on OUT2, and vice versa. A delay of T
CY
/2
-
0.125 to T
CY
/2 takes place from when reset is released until the
first output pulse occurs.
OUT1
OUT2
T
PW
T
CY
/2
V
DD
V
SS
T
PW
T
CY
/2
V
DD
V
SS
T < T
ON
T > T
ON
V
DD
V
SS
RESET
(open)
OUT1
T
PW
V
DD
V
SS
OUT2
T
CY
/2
T
CY
/2
V
DD
V
SS
T
D
CF5705 series
NIPPON PRECISION CIRCUITS INC.--6
Test Function
Normal mode (TEST = open circuit)
In test mode, a 512 Hz rectangular wave is output on TEST. Note that the output load (probe) must be greater
than 10 M
and less than 20 pF. The motor drive outputs on OUT1 and OUT2 continue to operate normally.
Test mode 1 (TEST = V
DD
)
Test mode 1 is invoked when TEST is held HIGH for a minimum of 2 cycles of the 512 Hz clock
(T
CH
> 3.9 ms), otherwise it is ignored. In test mode 1, high-speed motor output operation occurs, with the
cycle time set by mask option to 62.5 or 125 ms.
Test mode 2 (TEST = V
SS
)
Test mode 2 is a dedicated IC test mode. In test mode 2, the device operates at 32-times speed, with the supply
voltage connected directly to the oscillator circuit. Note that if a reset input occurs, the internal operation is
reset and device output stops. Once operation stops, normal operation is not restored until TEST is either open
circuit or goes LOW.
OUT1
OUT2
T
PW
T
CY
/2
V
DD
V
SS
T
PW
T
CY
/2
V
DD
V
SS
t
CY
/2
t
CY
/2
T
PW
T < T
ch
T > T
ch
V
DD
V
SS
TEST
CF5705 series
NIPPON PRECISION CIRCUITS INC.--7
NC9815BE
2001.12
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to
improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for
the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits
are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision
Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or
malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter,
including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome, Koto-ku,
Tokyo 135-8430, Japan
Telephone: +81-3-3642-6661
Facsimile: +81-3-3642-6698
http://www.npc.co.jp/
Email: sales
@
npc.co.jp
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