NPC CF5746BCA, CF5746AGA, CF5746AEA, CF5746ABA, CF5746AAB Datasheet

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CF5746 Series

NIPPON PRECISION CIRCUITS INC.

OVERVIEW

The CF5746 Series devices are analog clock ICs that
derive their timing from a 32 kHz oscillator element.

They feature alarm outputs, snooze function and
alarm auto-stop function. They can be configured to
match a wide variety of clock specifications, alarm
functions and motor outputs.

FEATURES

■

32.768 kHz oscillator circuit

•R

and R

f

built-in

d

• Oscillator capacitance built-in

-C

= 30 pF (typ, excluding CF5746ADC)

D

-C

= 20 pF (typ, CF5746ADC)

D

SERIES CONFIGURATION

CMOS Analog Clock IC

■

Alarm outputs

• Compatible with electronic sound alarms and
motor bells

• 4-step increasing volume alarm output
(CF5746AAB, ADC, AEA, AFA (AO1), AGA
(AO1))

■

Snooze function

• Temporarily stops alarm output and then re­starts after a fixed time

■

Debouce circuit (AI/SNZ pin)

■

Test functions

• Shortening snooze time and auto-stop time

• Increasing motor speed (excluding
CF5746BCA)

Power-ON clear function

■

1.5 V supply voltage

■

Chip form

■

CF5746AAB CF5746ABA CF5746BCA CF5746ADC CF5746AEA CF5746AFA CF5746AGA

XT pin C

Built-in
capacitance

Motor output

AI/SNZ input

Alarm output

Pad layout AABAAAA
Other Power-ON clear, oscillator R

1. A

O has the opposite polarity to AO only when output (same phase when non-active).

2. AS = auto-stop

(pF) None None None None None None None

G

pin C

XT

(pF) 30 30 30 20 30 30 30

G

Active level HIGH HIGH – HIGH HIGH HIGH HIGH
Needle period t
Pulsewidth t
Alarm active level LOW LOW LOW HIGH LOW LOW LOW
Pin type 512 Hz 512 Hz 512 Hz 512 Hz 512 Hz Pull-up Pull-up
SNZ interface Yes Yes Yes No Yes Yes Yes
SNZ time t
Bounce delay (ms) 31.25 31.25 31.25 31.25 31.25 31.25 31.25
SNZ release No No No No No Yes (2 s) Ye s (2 s)
Pins AO A
Active level HIGH LOW
Frequency f
Modulation f

Duty (%)

Step time
(s)

min (mA)

I

OH

I

min (mA) 0.8 0.8 0.8 0.8 0.8 0.8 0.002 0.002 0.8 0.8 0.002 0.8 0.002 0.8

OL

Auto-stop t

CY

(s) 1 1 0.125 1111

PW

(ms) 23.4375 31.25 50% duty 46.875 31.25 46.875 31.25

(s) 256 256 256 256 256 256 256

SNZ

O AO1 AO2 AO1 AO2 AO AO AO AO AO1 AO2 AO1 AO2

1

PW

(Hz) 4096 4096 DC DC D C DC 2048 2048 2048 2048 2048 DC 2048 DC

(Hz) 8+1 8+1 ––––8+18+18+18+18+1–8+1–

CY

Step 1 12.5 12.5 ––––6.26 6.26 6.26 6.26 12.5 – 6.26 –
Step 2 25 25 ––––12.5 12.5 12.5 12.5 25 – 12.5 –
Step 3 50 50 ––––2525505050–50–
Step 4 ––––––5050––––––
Step 1 0 to 7 0 to 7 ––––0 to 30 to 30 to 70 to 70 to 7–0 to 7–
Step 2 7 to 15 7 to 15 ––––3 to 73 to 77 to 157 to 157 to 15–7 to 15–

Step 3

Step 4 ––––––

STOP

15 to

2

AS

0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8 − 0.8

(s) 128 128 128 128 128 128 128

HIGH HIGH HIGH HIGH HIGH LOW

15 to

––––7 to 317 to 31

AS

31 to AS31 to

1

HIGH LOW

15 to AS15 to AS15 to

––––––

AS

and R

d

f

built-in

1

HIGH HIGH HIGH HIGH

–

AS

15 to

AS

–

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PAD DIMENSIONS

CF5746 Series

1

2

3

Y

4

(0, 0)

5

X

BLOCK DIAGRAM

10

9

8

7

6

TEST VSS

VDD

No.

1 VDD VSS 166 1210
2 VS S VDD 166 882
3 OUT1 AI/SNZ 166 474
4 AI/SNZ AO1 166 228
5 TEST AO2 444 169
6 OUT2 OUT1 1444 169
7 AO (AO1) OUT2 1444 513
8A
9XT XT 1444 1516

10 XT XT 1192 1531

Chip size: 1.61 × 1.70 mm
Chip thickness: 400 ± 30 µm
Pad size: 100 × 100 µm
Chip surface is at V

Layout Dimensions (µm)

A (ex. BCA) B (BCA) X Y

O (AO2) TEST 1444 1219

potential.

DD

XT

XT

AO(AO1)
AO(AO2)

CD

4- Stage

Divider

AO Duty

Control

Alarm

Out

11- Stage

Divider

4- Stage

Divider

Snooze

Counter

Output
Control

Input

Control

OUT1
OUT2

AI/SNZ

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PIN DESCRIPTION

Name Description

VDD Positive supply voltage pin
VSS Ground pin

XT Oscillator input pin

XT
OUT1 Motor output pin 1
OUT2 Motor output pin 2

AI/SNZ Alarm/snooze input pin
AO (AO1) Alarm output pin
AO (AO2) Alarm output pin

TEST Test pin

Oscillator output pin

−

−

−

°

−

° C

−

−

−

−

− 1 − 3 −

∆

CF5746 Series

SPECIFICATIONS

Absolute Maximum Ratings

Parameter Symbol Condition Rating Unit

Supply voltage range V
Input voltage range V
Operating temperature range T
Storage temperature range T

Electrical Characteristics

T

= 25 ° C, V

a

Operating voltage V
Current consumption
Motor output current I
Alarm HIGH-level output current I
Alarm LOW-level output current
Alarm LOW-level output current
AI/SNZ HIGH-level input voltage V
AI/SNZ LOW-level input voltage V
AI/SNZ HIGH-level output current I

AI/SNZ LOW-level output current I
Oscillator frequency stability

VDD-to-XT pin built-in
capacitance

VDD-to-XT
capacitance

= 1.5 V, V

DD

Parameter Symbol Condition

1

2

3

pin built-in

= 0 V, f

SS

DD

DD

I

DD

MOT

OH

I

OL

IH

IL

OH

OL

f/f V

C

G

C

D

V

SS

IN

opr

stg

= 32.768 kHz unless otherwise noted

0

0.3 to 5.0 V

V

to V

SS

DD

30 to 70

40 to 125

Rating

min typ max

1.2 – 2.0 V

No load

– 1.0 2.0 µA

V

DD

V

DD

V

DD

= 1.2 V, R
= 1.2 V , V
= 1.2 V , V

= 200 Ω

L

= 0.7 V

OH

= 0.5 V 0.8 1.5 – mA

OL

±3.8 – – mA

0.8

1.5 – mA

21530µA

V

0.2 – V

DD

V

SS

V

= V

1.5 V

+ 1.5 V

Excluding
CF5746AFA,
AGA

1310µA

OH

DD

= V

V

OL

DD

= 1.2 to 2.0 V – 0.5 1 ppm/0.1 V

DD

–V

DD

+ 0.2 V

SS

10 µA

– None – pF

Excluding CF5746ADC – 30 – pF
CF5746ADC – 20 – pF

V

C

Unit

V

1. All pins except the supply and crystal oscillator pins are open.

2. CF5746AAB, ABA, BCA, AEA, AFA (AO2), AGA (AO2)

3. CF5746ADC, AFA (AO1), AGA (AO2)

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