ETC CF5705SERIES

CF5705 series
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
■
■
32.768 kHz crystal oscillator circuit
CG and CD built-in
−3.6 to −1.2 V operating supply voltage range
■
Operating current consumption
• VSS = –1.55V, CD = 16pF: 250 nA (max)
• VSS = –2.8V, CD = 26pF: 1000 nA (max)
Note: Current consumption depends on the built-in capacitor.
■
Reset function
4 Hz and subsequent frequency dividers are reset
SERIES LINEUP
Pad coordinates
Built-in
capacitor1
Motor
Version
1
2
3
4
5
6
7
8
Cycle
(Tcy/2)
[sec]
Pulse
(Tpw)
[sec]
Test
(Tcy)
[sec]
CG
[pF]
CD
[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
1. Parasitic capacitance is included. Parasitic capacitance: CG = CD = 4pF
PART NUMBER GUIDE
CF5705
Function(Motor, Built-in capacitor)
Pad coordinate
ORDERING INFORMATION
Device
Package
CF5705××
Chip form
NIPPON PRECISION CIRCUITS INC.—1
CF5705 series
PAD DIMENSIONS (Top view)
PAD COORDINATES
Number
X (µm)
Y (µm)
1
155
785
2
155
597
3
155
363
4
155
175
(1000,1060)
NPC
2
HA5705
1
8
7
5
844
175
3
6
6
844
363
4
5
7
844
694
8
844
882
(0,0)
Chip size: 1.000 × 1.060 mm
Chip thickness: 220 µm
Pad size: 100 × 100 µm
Reverse side: VDD level
BLOCK DIAGRAM
RESET
XT
TEST
32kHz
Oscillator
XTN
OUT1
Divider and
Output buffer control
Voltage
regulator
OUT2
PAD DESCRIPTION
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
Pin number: Refer to Series lineup.
NIPPON PRECISION CIRCUITS INC.—2
CF5705 series
SPECIFICATIONS
Absolute Maximum Ratings
VDD = 0 V
Parameter
Symbol
Rating
Unit
Supply voltage range
VSS
−5.0 to 0.3
V
Input voltage range
VIN
VSS − 0.3 to 0.3
V
Storage temperature range
Tstg
−40 to 125
°C
Symbol
Rating
Unit
Supply voltage
VSS
−3.6 to −1.2
V
Operating temperature
Topg
−20 to 75
°C
Recommended Operating Conditions
Parameter
Electrical Characteristics
VDD = 0 V, Ta = 25 °C, X’tal CI = 55kΩ max
Rating
Parameter
Operating supply voltage
Operating current consumption1
Reset input current
Reset input resistance
Motor output current
Symbol
IDD
IRST
RRST
IMOT
TCY
Motor output cycle time2 (test mode)
tCY
Motor output pulsewidth2
TPW
Oscillator start voltage2
VSTA
Oscillator start time
TSTA
Frequency voltage deviation
∆f/f
Internal capacitance2
ε’
CG , CD
Unit
min
typ
max
−3.6
−
−1.2
V
No load, VSS = –1.55V,
(CTR + CG) = 15 pF, CD = 16 pF
–
0.15
0.25
µA
No load, VSS = –2.8V,
(CTR + CG) = 24 pF, CD = 26 pF
–
0.40
1.00
µA
RESET: VRST = VDD , VSS = –1.55V
–
6
–
nA
RESET: VRST = VDD , VSS = –2.8V
–
25
100
nA
VRST = −1.35 V, VSS = –1.55V
15
35
60
kΩ
VRST = −2.6 V, VSS = –2.8V
5
15
50
kΩ
RL = 2 kΩ, VSS = −1.55 V
0.7
–
–
mA
RL = 1 kΩ, VSS = −2.4 V
2.18
2.29
–
mA
VSS
Motor output cycle time2 (normal mode)
Frequency deviation3
Condition
s
Refer to the SERIES LINEUP
ms
ms
−1.3
–
–
V
From supply ON to 512 Hz output
on TEST
–
2
5
s
VSS = −1.2 → −3.6 V, CTR = 5 pF
–
0.2
1
ppm/0.1V
Built-in CD
–8
–
8
ppm
Built-in CD and CG
– 16
–
16
ppm
(CG + CD) < 62 pF
Refer to the SERIES LINEUP
pF
1. Current consumption is measured in the measurement circuit (see next page).
2. Refer to Series lineup.
3. ε’ = [f (1.55V) – f’0] / f’0 (CD = 16pF)
ε’ = [f (2.8V) – f’0] / f’0 (CD = 26pF)
f’0: Oscillation frequency center value of Standard Deviation in the same measuring conditions
NIPPON PRECISION CIRCUITS INC.—3
CF5705 series
Measurement Circuit
VDD
CTR
A
RESET
IRST
XT
TEST
CD
XTN
X'tal
VSS
OUT1
OUT2
A
IMOT
RL
Crystal: f = 32.768 kHz, CI = 20 kΩ, C0 = 1.3pF, C1 = 2.6fF
NIPPON PRECISION CIRCUITS INC.—4
CF5705 series
FUNCTIONAL DESCRIPTION
Motor Output Waveform
TPW
VDD
OUT1
VSS
TPW
VDD
OUT2
TCY/2
VSS
TCY/2
The motor output waveform cycle time and output pulsewidth are set by mask option.
Reset Function
T < TON
T > TON
VDD
RESET
(open)
VSS
TPW
VDD
OUT1
VSS
VDD
OUT2
TCY/2
TCY/2
TD
VSS
Reset operation
A reset operation occurs when RESET is held HIGH (VDD) 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 preceding motor drive output pulse occurred; first pulse occurs on OUT1 if previous motor drive pulse occurred
on OUT2, and vice versa. A delay of TCY/2 − 0.125 to TCY/2 takes place from when reset is released until the
first output pulse occurs.
NIPPON PRECISION CIRCUITS INC.—5
CF5705 series
Test Function
T < Tch
T > Tch
VDD
TEST
VSS
TCY/2
TCY/2
tCY/2 tCY/2
VDD
OUT1
VSS
TPW
VDD
OUT2
TPW
TPW
VSS
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 MΩ and less than 20 pF. The motor drive outputs on OUT1 and OUT2 continue to operate normally.
Test mode 1 (TEST = VDD)
Test mode 1 is invoked when TEST is held HIGH for a minimum of 2 cycles of the 512 Hz clock
(TCH > 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 = VSS)
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.
NIPPON PRECISION CIRCUITS INC.—6
CF5705 series
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
NC9815BE
2001.12
NIPPON PRECISION CIRCUITS INC.—7