CF5705 series
NIPPON PRECISION CIRCUITS INC.
Analog Watch Stepping Motor Driver
OVERVIEW
The CF5705 series is a low-current analog watch stepping motor driver CMOS IC with built-in 32.768 kHz
crystal oscillator circuit.
FEATURES
s
s
32.768 kHz crystal oscillator circuit
C
G
and C
D
built-in
−
3.6 to
−
1.2 V operating supply voltage range
s
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.
s
Reset function
4 Hz and subsequent frequency dividers are reset
SERIES LINEUP
P ad coordinates
Version
1
CF5705AA
CF5705BC
CF5705AD
CF5705AE
CF5705CF
CF5705CG
XT
VSS
XT
XT
VSS
VSS
2
XTN
RESET
XTN
XTN
TEST
TEST
3
RESET
XT
RESET
RESET
XTN
XTN
4
VSS
XTN
VSS
VSS
XT
XT
5
TEST
VDD
TEST
TEST
VDD
VDD
6
OUT2
OUT2
OUT2
OUT2
OUT2
OUT2
7
OUT1
OUT1
OUT1
OUT1
OUT1
OUT1
8
VDD
TEST
VDD
VDD
RESET
RESET
C y c le
(Tcy/2)
sec
1
250m
1
20
1
1
Motor
Pulse
(Tpw)
sec
4.9m
23.4m
23.4m
5.9m
4.9m
3.9m
Test
(Tcy)
sec
125m
125m
125m
125m
62.5m
62.5m
Built-in
capacitor
1
C
G
pF
4
4
4
4
4
4
C
D
pF
16
26
30
16
16
16
1. Parasitic capacitance is included. Parasitic capacitance: C
G
= C
D
= 4pF
PART NUMBER GUIDE
CF5705
Function(Motor, Built-in capacitor)
Pad coordinate
ORDERING INFORMATION
D e vice
C F 5 7 0 5
××
P ackag e
Chip form
NIPPON PRECISION CIRCUITS—1
NPC [ NIPPON PRECISION CIRCUITS INC ]
