Datasheet CF5760JA, CF5760HA, CF5760FC, CF5760EA, CF5760DA Datasheet (NPC)

CF5760 series

NIPPON PRECISION CIRCUITS INC.

CMOS Analog Clock IC

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

■

1.2 to 2.0V operating supply voltage

■

1.2µA (typ) / 1.5V current consumption

■

32.768 kHz oscillator circuit

■

Oscillator capacitance C

■

Alarm output function

■

Reset function (optional seconds control function)

■

Input chattering elimination function (AI/R)

■

Chip form (CF5760 ×× )

and C

G

built-in

D

PAD LAYOUT

VDD

AI/R

O1

O2

(0,0)

Top view

1

XT

9

2

8

XTN

3

7

AON

6

AO

45

HA5760

VSS

Chip size: 0.76

×

1.21 mm
Chip thickness: 300 ± 30 µm
Pad size: 100
Re verse side: V

×

100 µm

level

DD

SERIES CONFIGURATION

CF5760AA CF5760BA CF5760CC CF5760DA CF5760EA CF5760FC CF5760HA CF5760JA

C

(pF) 33333333

Built-in
capacitance

Alarm input/reset input level HIGH/LOW HIGH/LOW LOW/HIGH LOW/HIGH –/LOW LOW /HIGH LOW/HIGH LOW/HIGH

Motor output

Alarm output

1. Built-in capacitance includes the parasitic capacitance.

G

1

C

(pF) 25 25 33 25 25 33 25 25

D

Active level LOW LOW HI GH LOW – – HI GH –
Needle period

t

(s)

CY

Pulsewidth

(ms)

t

PW

Pins AO AO N AO AON AO AO N A O AO N AO AON AO AO N A O AO N AO AON
Active level HI GH LOW HI GH
Frequency

(kHz)

f

PW

Modulation

(Hz)

f

CY

I

min (

µ

A) 900 900 900 10 900 900 900 10 – – 900 900 900 900 900 10

OH

I

min (

µ

A) 900 900 10 10 900 900 10 10 – – 900 900 900 900 10 10

OL

111110.0625 1 0.0625

23.4 23.4 31.25 27.3 1000 62.5 46.875 62.5

F

HIGH LOW HIGH

(32kHz)

44DC–22DC–––2222DC–

88––8 + 18 + 1––––8 + 18 + 18 + 18 + 1––

F

– – HIGH LOW HIGH LOW HIGH

(32kHz)

(32kHz)

F

ORDERING INFORMATION

De vice Pack ag e

CF5760

××

Chip form

NIPPON PRECISION CIRCUITS—1

BLOCK DIAGRAM

CF5760 series

XT

XTN

AI/R

CG

CD

Reset
Input

Alarm
Input

VDD

7 Stage

Divider

VSS

9 Stage
Divider

Alarm Output

Control

AO AON

Motor Output

Control

O1 O2

PAD DESCRIPTION/DIMENSIONS

No. Name Description

1 VD D Supply 155 1065
2 AI/R Alarm input and reset input 15 5 85 4
3 O1 Motor output 1 155 6 20
4 O2 Motor output 2 145 1 45
5 V SS Ground 615 145
6 AO Alarm o utput 1 615 3 25
7 AON Alarm ou tput 2 615 50 5
8 XT N Oscillator output 61 5 74 6
9 X T Oscillator input 6 1 5 1065

Dimensions (µm)

XY

NIPPON PRECISION CIRCUITS—2

SPECIFICATIONS

Absolute Maximum Ratings

Parameter Symbol Condition Rating Unit

Supply voltage range V
Input voltage range V
Ope rating temperature range T
Storage temperature range T

Electrical Characteristics

T

= 25 ° C, V

a

erwise noted

= 1.5V, V

DD

SS

DD

= 0V, C

−

V

IN

opr

stg

= 23pF, C

G

SS

C

CF5760 series

−

0.3 to 5.0 V

V

≤

V

≤

= 25pF, X’tal (f

D

SS

−

−

65 to 150

= 32.768kHz, C

0

V

IN

DD

30 to 80

= 50k Ω max) unless oth-

I

V

°

C

°

Parameter Symbol Condition

Ope r ating voltage V
Current consumption I
Oscillator start-up time t
Motor output current I
AI/R HIGH-level input current I
AI/R LOW -level input current I
Oscillator frequency stability

Alarm L O W-level output current

2

(AO, AON)

Alarm HIGH-level output current

2

(AO, AON)
F output voltage

Internal capacitance

1. R

is the load resistance connected between O1 and O2.

L

2. CF5760AA/ CC/ FC/ HA: If the outputs (AO or AON) are shor t circuit, the output current is I

3

4

3. The F output voltage rating, V F, when a load capacitance, C
ag e, 0.5V

4. C

G

, and the peak voltage.

DD

is the capacitance between VDD and XT. C

DD

DD

STA

MOT

IH

IL

∆

f/f V

I

OL1

I

OL2

I

OH1

I

OH2

V

F

C

G

C

D

D

O1 = O2 = open – 1.2 4.0 µA
V

= 1.2V – – 5.0 s

DD

V

= 1.2V, R

DD

V

= 1.5V 2 4 8 µ A

DD

V

= 1.5V 2 4 8 µ A

DD

= 1.2 to 2.0V – 0.5 1 .0 ppm/0.1V

DD

V

= 1.5V, V

DD

V

= 1.5V, V

DD

V

= 1.5V, V

DD

V

= 1.5V, V

DD

V

= 1.2V, C

DD

, is connected between pin F and VS S, is the differ en c e voltage between the center volt-

L

1

= 200

Ω

L

= 0.75V 900 2000 – µA

OL

= 0.75V 10 30 – µA

OL

= 0.75V 900 2000 – µ A

OH

= 0.75V 1 0 30 – µA

OH

= 50pF 0.4 – – V

L

is the capacitance between VDD and XTN.

AO

Rating

min typ max

1.2 – 2.0 V

4.0 – – mA

Refer to the SERIES LINEUP

≥

900

µ

A.

Unit

pF
pF

NIPPON PRECISION CIRCUITS—3

CF5760 series

FUNCTIONAL DESCRIPTION

Motor Output

Motor output waveform (step motor driver)

tPW

O1

(Active High)

O2

(Active High)

tCY

tPW

tCY

tCY : Needle period
tPW : Pulse width

Motor output waveform (sweep motor driver)

tPW

62.5ms

O1

tCY

62.5ms

O2

tCY

62.5ms

tPW

62.5ms

tCY : Needle period
tPW : Pulse width

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).

t

ON

AI/R

(Active Low)

t

< 62.5ms: input is ignored.

ON

62.5

≤

t

≤

125ms: indeter minate

ON

t

> 125ms: input is accepted.

ON

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)

O1

(Active High)

O2

(Active High)

tPW

tCY tCY

tPW

tON

tCY

+0

−125msec

Alarm Output

Alarm output waveform

tON

AI/R

(Active High)

AO

(Active High)

fPW(Hz)fCY (Hz)

*1

AON

(Active Low)

*1: Opposite phase to AO .
f

= alarm fundamental frequency

PW

f

= alarm modulation frequency

CY

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

VSS

3kΩ

CG

X'tal

Alarm
Switch

Reset

Switch

XT

XTN

AI/R

Reset (HIGH)/Alarm (LOW), DC Output, F Output

VDD

O1

O2

AO

VSS

3kΩ

CG

Reset

Switch

Alarm
Switch

X'tal

XT

XTN

AI/R

O1

M

O2

AO

AON

Piezo

Speaker

M

Motor

Bell

M

F

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 export controls on the distribution or dissemination of the products. Customers shall not export, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.

NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome

Koto-ku, Tokyo 135-8430, Japan

NIPPON PRECISION CIRCUITS INC.

Telephone: [phone]
Facsimile: 03-3642-6698

NC9812BE 2000.09

NIPPON PRECISION CIRCUITS—7