CF5741 series
NIPPON PRECISION CIRCUITS INC.
Analog Clock CMOS IC
OVERVIEW
The CF5741 series are analog clock driver ICs
using 32.768kHz reference frequency of crystal
oscillator. Some versions in accordance with the
combinations of each motor drive and alarm output
characteristics can provide a wide range of applica-
tions for various clock specifications.
PINOUT
(Top View)
VSS
AO1
AO2/F
Y
XTN
XT
(0,0)
1
2
3
4
5
SA5741
10
9
8
7
6
OUT2
OUT1
AI
RST/TC
VDD
FEATURES
s
s
s
s
s
s
s
s
s
Operating voltage 1.2 to 2.0V
Low current 1.2
µ
A (typ) / 1.5V
Built-in oscillator circuits (32.768 kHz)
Built-in crystal oscillator capacitors (C
G
, C
D
)
Motor output
Various motor output
Alarm output
Various alarm output
Reset function
Input debounce function (AI, RST/TC)
Chip form (CF5741
××
)
X
Chip size : 1.22
×
1.20 mm
Chip thickness : 400
±
30
µ
m
Pad size : 100
×
100
µ
m
Reverse side : V
DD
level
SERIES LINEUP
CF5741AA
Built-in capacitor
Reset input
XT terminal C
G
(pF)
XTN terminal C
D
(pF)
Active level
Active level
Motor output
Hand drive cycle t
CY
(sec)
Pulse width t
PW
(msec)
Alarm input
Active level
Test function (1/2V
DD
)
Terminal
Alarm output
Active level
Fundamental frequency f
PW
(Hz)
Modulation frequency f
CY
(Hz)
AO1
High
2048
8
+
1
0
25
Low
(Pull-up resistor)
High
1
31.25
Low
(Pull-up resistor)
Yes
AO2/F
High
32
−
AO1
High
2048
8
+
1
CF5741AB
25
25
Low
(Pull-up resistor)
High
1
31.25
Low
(Pull-up resistor)
Yes
AO2/F
High
32
−
AO1
High
2048
8
+
1
CF5741BA
0
25
Low
(Pull-up resistor)
High
1
46.875
Low
(Pull-up resistor)
Yes
AO2/F
1
Low
2048
8
+
1
AO1
High
2048
8
+
1
CF5741BB
27
25
Low
(Pull-up resistor)
High
1
46.875
Low
(Pull-up resistor)
Yes
AO2/F
1
Low
2048
8
+
1
1. AO is complete reverse phase of AO. (even output is inactive.)
ORDERING INFORMATION
Device
CF5741
××
Package
Chip form
NIPPON PRECISION CIRCUITS—1
NPC [ NIPPON PRECISION CIRCUITS INC ]
