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CF5741AB Schematic ( PDF Datasheet ) - Nippon Precision Circuits Inc

Teilenummer CF5741AB
Beschreibung Analog Clock CMOS IC
Hersteller Nippon Precision Circuits Inc
Logo Nippon Precision Circuits Inc Logo 




Gesamt 7 Seiten
CF5741AB Datasheet, Funktion
NIPPON PRECISION CIRCUITS INC.
CF5741 series
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.
FEATURES
s Operating voltage 1.2 to 2.0V
s Low current 1.2µA (typ) / 1.5V
s Built-in oscillator circuits (32.768 kHz)
s Built-in crystal oscillator capacitors (CG, CD)
s Motor output
Various motor output
s Alarm output
Various alarm output
s Reset function
s Input debounce function (AI, RST/TC)
s Chip form (CF5741××)
PINOUT
(Top View)
VSS
AO1
AO2/F
Y
XTN
XT
1 SA5741 10
29
38
47
56
(0,0)
X
Chip size : 1.22 × 1.20 mm
Chip thickness : 400 ± 30 µm
Pad size : 100 × 100 µm
Reverse side : VDD level
OUT2
OUT1
AI
RST/TC
VDD
SERIES LINEUP
CF5741AA
Built-in capacitor
Reset input
XT terminal CG (pF)
XTN terminal CD (pF)
Active level
0
25
Low
(Pull-up resistor)
Active level
High
Motor output
Alarm input
Hand drive cycle tCY (sec)
Pulse width tPW (msec)
Active level
Test function (1/2VDD)
Terminal
1
31.25
Low
(Pull-up resistor)
Yes
AO1 AO2/F
Alarm output
Active level
Fundamental frequency fPW (Hz)
Modulation frequency fCY (Hz)
High
2048
8+1
High
32
1. AO is complete reverse phase of AO. (even output is inactive.)
CF5741AB
25
25
Low
(Pull-up resistor)
High
1
31.25
Low
(Pull-up resistor)
Yes
AO1 AO2/F
High High
2048 32
8+1
CF5741BA
0
25
Low
(Pull-up resistor)
High
1
46.875
Low
(Pull-up resistor)
Yes
AO1 AO2/F1
High Low
2048 2048
8+1 8+1
CF5741BB
27
25
Low
(Pull-up resistor)
High
1
46.875
Low
(Pull-up resistor)
Yes
AO1 AO2/F1
High Low
2048 2048
8+1 8+1
ORDERING INFORMATION
Device
CF5741××
Package
Chip form
NIPPON PRECISION CIRCUITS—1






CF5741AB Datasheet, Funktion
CF5741 series
Test Function
Fundamental frequency alarm output function
AI goes to 1/2VDD when AO1 and AO2 output alarm fundamental frequency. This frequency can used to
adjust frequency.
AI
(Active Low)
fCY (Hz)
1/2VDD
fPW(Hz)
AO1
(Active High)
*1
AO2/F
(Active High)
AO2/F*2
(Active Low)
*1 : AO2 / F is the reverse phase of AO1, when output is active.
*2 : AO2 / F is complete reverse phase of AO1.
fPW : Alarm fundamental frequency
fCY : Alarm modulation frequency
Gain fast function
RST/TC is active level more than 125 msec. And RST/TC input outside clock when motor output gain fast.
tCPW is more less than 0.9765625 msec.
t tRES CPW
RST/TC
(Active Low)
tRES 125msec
tCPW 0.9765625msec
NIPPON PRECISION CIRCUITS—6

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