Analog Watch Stepping Motor Driver
Description
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 CG and CD built-in −3.
6 to −1.
2 V operating supply voltage range
s
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.
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 CG pF 4 4 4 4 4 4 CD 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
CF5705 series
PAD DIMENSIONS (Top view)
(1000,1060)
NPC
PAD COORDINATES
Number 1 2 3 4 5 X ( µm ) 155 155 155 155 844 844 844 844 Y ( µm ) 785 597 363 175 175 363 694 882
1 2 3 4 (0,0)
8 7 6 5
Chip size: 1.
000 × 1.
060 m m Chip thickness: 220 µm P ad size: 100 × 100 µm R e verse side: V D D level
BLOCK DIAGRAM
RESET TEST
XT XTN
PAD DESCRIPTION
Name VSS VDD XT XTN OUT1 OUT2 RESET TEST Description Negative supply voltage Positive supply voltage Cr ystal oscillator circuit input Cr ystal oscillator circuit output Stepping motor driver output 1 Stepping motor driver output 2 Reset input Test mode select.
512 Hz clock output
P...
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