NPC CF5760BA

CF5760 series
CMOS Analog Clock IC
NIPPON PRECISION CIRCUITS INC.
OVERVIEW
The CF5760 series devices are analog clock ICs that derive their timing from a 32.768 kHz oscillator element.
They feature a reset function (optional seconds control function) which can be used to maintain accurate time.
Various alarm functions and motor outputs are available to match a wide range of clock specifications.
FEATURES
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PAD LAYOUT
1.2 to 2.0V operating supply voltage
1.2µA (typ) / 1.5V current consumption
32.768 kHz oscillator circuit
Oscillator capacitance CG and CD built-in
Alarm output function
Reset function (optional seconds control function)
Input chattering elimination function (AI/R)
Chip form (CF5760××)
Top view
VDD
1
AI/R
2
O1
3
O2
4
9
XT
8
XTN
7
AON
6
AO
5
VSS
HA5760
(0,0)
Chip size: 0.76 × 1.21 mm
Chip thickness: 300 ± 30 µm
P ad size: 100 × 100 µm
R e verse side: V D D level
SERIES CONFIGURATION
CF5760AA
C F 5 7 6 0 BA
CF5760CC
C F 5 7 6 0 DA
CF5760EA
CF5760FC
CF5760HA
3
3
3
3
3
3
3
3
25
25
33
25
25
33
25
25
H I G H / L OW
H I G H / L OW
LOW/HIGH
LOW/HIGH
–/LOW
LOW/HIGH
LOW/HIGH
LOW/HIGH
LOW
LOW
HIGH
LOW
–
–
HIGH
–
1
1
1
1
1
0.0625
1
0.0625
23.4
23.4
31.25
27.3
1000
62.5
46.875
62.5
C G (pF)
Built-in
capacitance 1 C (pF)
D
Alarm input/reset input level
Active level
Motor output
Needle period
tC Y (s)
Pulsewidth
tP W (ms)
Pins
Alarm output
AO
AO N
AO
AO N
F
AO
AO N
AO
AO N
F
C F 5 7 6 0 JA
AO
AO N
AO
AO N
AO
AO N
AO
–
–
HIGH
LOW
HIGH
LOW
HIGH
AO N
F
HIGH
LOW
HIGH
–
2
2
DC
–
–
–
2
2
2
2
DC
–
–
–
8+1
8+1
–
–
–
–
8+1
8+1
8+1
8+1
–
–
900
900
10
900
900
900
10
–
–
900
900
900
900
900
10
900
10
10
900
900
10
10
–
–
900
900
900
900
10
10
Active level
HIGH
LOW
HIGH
Frequency
fP W (kHz)
4
4
DC
Modulation
fC Y (Hz)
8
8
IO H min ( µA)
900
IO L min ( µA)
900
(32kHz)
(32kHz)
(32kHz)
1. Built-in capacitance includes the parasitic capacitance.
ORDERING INFORMATION
D e vice
P ackag e
C F 5 7 6 0 ××
Chip form
NIPPON PRECISION CIRCUITS—1
CF5760 series
BLOCK DIAGRAM
VDD
VSS
7 Stage
Divider
9 Stage
Divider
CG
XT
CD
XTN
Reset
Input
AI/R
Alarm
Input
Motor Output
Control
Alarm Output
Control
AO
O1
AON
O2
PAD DESCRIPTION/DIMENSIONS
Dimensions (µm)
No.
Name
Description
X
Y
1
VDD
Supply
155
1065
2
AI/R
Alarm input and reset input
155
854
3
O1
Motor output 1
155
620
4
O2
Motor output 2
145
145
5
VSS
Ground
615
145
6
AO
Alarm output 1
615
325
7
AO N
Alarm output 2
615
505
8
XTN
Oscillator output
615
746
9
XT
Oscillator input
615
1065
NIPPON PRECISION CIRCUITS—2
CF5760 series
SPECIFICATIONS
Absolute Maximum Ratings
P arameter
Rating
Unit
VDD − VSS
−0.3 to 5.0
V
Input voltage range
V IN
V S S ≤ V IN ≤ V D D
V
Operating temperature range
T opr
−30 to 80
°C
Storage temperature range
T stg
−65 to 150
°C
Supply voltage range
Symbol
Condition
Electrical Characteristics
Ta = 25°C, VDD = 1.5V, VSS = 0V, CG = 23pF, CD = 25pF, X’tal (f0 = 32.768kHz, CI = 50kΩ max) unless otherwise noted
Rating
P arameter
Symbol
Condition
Unit
min
typ
max
1.2
–
2.0
V
Operating voltage
VDD
Current consumption
ID D
O1 = O2 = open
–
1.2
4.0
µA
Oscillator start-up time
tS TA
V D D = 1.2V
–
–
5.0
s
Motor output current
IM O T
V D D = 1.2V, R L = 200 Ω 1
4.0
–
–
mA
AI/R HIGH-level input current
IIH
V D D = 1.5V
2
4
8
µA
AI/R LOW -level input current
IIL
V D D = 1.5V
2
4
8
µA
Oscillator frequency stability
∆f/f
V D D = 1.2 to 2.0V
–
0.5
1.0
ppm/0.1V
Alarm L OW -level output current 2
(AO , AO N )
IO L 1
V D D = 1.5V, V O L = 0.75V
900
2000
–
µA
IO L 2
V D D = 1.5V, V O L = 0.75V
10
30
–
µA
Alarm HIGH-level output current 2
(AO , AO N )
IO H 1
V D D = 1.5V, V O H = 0.75V
900
2000
–
µA
IO H 2
V D D = 1.5V, V O H = 0.75V
10
30
–
µA
V D D = 1.2V, C L = 50pF
0.4
–
–
V
F output voltage 3
Internal capacitance 4
VF
CG
CD
pF
Refer to the SERIES LINEUP
pF
1. R L is the load resistance connected between O1 and O2.
2. CF5760AA/ CC/ FC/ HA: If the outputs (AO or AON) are shor t circuit, the output current is I A O ≥ 900 µA.
3. The F output voltage rating, V F, when a load capacitance, C L , is connected between pin F and V S S , is the difference voltage between the center voltage, 0.5V D D , and the peak voltage.
4. C G is the capacitance between V D D a n d X T. C D is the capacitance between VDD and XTN.
NIPPON PRECISION CIRCUITS—3
CF5760 series
FUNCTIONAL DESCRIPTION
Motor Output
Motor output waveform (step motor driver)
tPW
O1
(Active High)
tPW
O2
(Active High)
tCY
tCY
tCY : Needle period
tPW : Pulse width
Motor output waveform (sweep motor driver)
tPW
62.5ms
O1
tCY
tCY
62.5ms
62.5ms
tCY : Needle period
tPW : Pulse width
O2
tPW
62.5ms
Input Chattering Elimination Function (AI/R)
A bounce delay is provided on the AI/R input to eliminate erroneous operation caused by input bounce (chattering).
tON
AI/R
(Active Low)
tO N < 62.5ms: input is ignored.
62.5 ≤ tO N ≤ 125ms: indeterminate
tO N > 125ms: input is accepted.
Input Control Functions
When AI/R is open circuit, a 256Hz signal is output.
When AI/R is HIGH or LOW, it selects the alarm (HIGH)/reset (LOW) function or reset (HIGH)/alarm (LOW)
function depending on the version.
NIPPON PRECISION CIRCUITS—4
CF5760 series
Reset Function (optional seconds control function)
When AI/R goes active level for a reset, the motor output stops. When the reset is released, the first motor output pulse occurs on the output pin opposite to that which had the last output pulse immediately before the reset.
AI/R
(Active Low)
tPW
tON
O1
(Active High)
tPW
O2
(Active High)
tCY
tCY
+0
tCY −125msec
Alarm Output
Alarm output waveform
tON
AI/R
(Active High)
AO
(Active High)
fCY (Hz)
fPW(Hz)
*1
AON
(Active Low)
*1: Opposite phase to AO .
fP W = alarm fundamental frequency
fC Y = alarm modulation frequency
F Output Function
The AON pin may be replaced by the F pin which is used to output a 32kHz signal (unaffected by the reset
function).
NIPPON PRECISION CIRCUITS—5
CF5760 series
TYPICAL APPLICATION CIRCUITS
Alarm (HIGH)/Reset (LOW), Piezoelectric alarm
VDD
CG
XT
O1
XTN
O2
M
X'tal
3kΩ
Alarm
Switch
AO
Piezo
Speaker
AI/R
AON
Reset
Switch
VSS
Reset (HIGH)/Alarm (LOW), DC Output, F Output
VDD
CG
XT
O1
XTN
O2
M
Motor
Bell
M
X'tal
Reset
Switch
AO
AI/R
F
3kΩ
Alarm
Switch
VSS
NIPPON PRECISION CIRCUITS—6
CF5760 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 expor t controls on the distribution or dissemination of the products. Customers shall not expor t, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.
NIPPON PRECISION CIRCUITS INC.
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome
Koto-ku, Tokyo 135-8430, Japan
Telephone: 03-3642-6661
Facsimile: 03-3642-6698
NC9812BE
2000.09
NIPPON PRECISION CIRCUITS—7