NPC CF5705CG, CF5705CF, CF5705BC, CF5705AE, CF5705AD Datasheet

pF

−

××

CF5705 series

NIPPON PRECISION CIRCUITS INC.

Analog Watch Stepping Motor Driver

OVERVIEW

The CF5705 series is a low-current analog watch stepping motor driver CMOS IC with built-in 32.768 kHz
crystal oscillator circuit.

FEATURES

■

32.768 kHz crystal oscillator circuit
C

and C

G

■

3.6 to − 1.2 V operating supply voltage range

built-in

D

■

Operating current consumption

•V

= –1.55V, C

SS

•V

= –2.8V, C

SS

Note: Current consumption depends on the built-in capacitor.

■

Reset function

= 16pF: 250 nA (max)

D

= 26pF: 1000 nA (max)

D

4 Hz and subsequent frequency dividers are reset

SERIES LINEUP

Pad coordinates Motor

Version

12345678

CF5705AA XT XTN RESET VSS TEST OUT2 OUT1 VDD 1 4.9m 125m 4 16
CF5705BC VSS RESET XT XTN VDD OUT2 OUT1 TEST 250m 23.4m 125m 4 26
CF5705AD XT X TN RESET VSS TEST OUT2 OUT1 VDD 1 23.4m 125m 4 30
CF5705AE XT XTN RESET VSS TEST OUT2 OUT1 V DD 20 5.9m 125m 4 16
CF5705CF VSS TEST XTN XT V DD OUT2 OUT1 RESET 1 4.9m 62.5m 4 16
CF5705CG VSS TEST XTN XT VD D OUT2 OUT1 RESET 1 3.9m 62.5m 4 16

1. Parasitic capacitance is included. Parasitic capacitance: C

G

= C

= 4pF

D

Cycle

(Tcy/2)

sec

Pulse
(Tpw)

sec

Test

(Tcy)

sec

Built-in

capacitor

C

G

pF

1

C

D

PART NUMBER GUIDE

CF5705

ORDERING INFORMATION

De vice Pack ag e

CF5705

Chip form

Function(Motor, Built-in capacitor)
Pad coordinate

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×

µ

µ m)

CF5705 series

PAD DIMENSIONS

NPC

HA5705

1
2

3
4

(0,0)

Chip size: 1.000
Chip thickness: 220 µ m
Pad size: 100 × 100 µ m
Re verse side: V

BLOCK DIAGRAM

(Top view)

(1000,1060)

8
7

6
5

1.060 mm

level

DD

PAD COORDINATES

Number X (

1 155 785
2 155 597
3 155 363
4 155 175
5 844 175
6 844 363
7 844 694
8 844 882

TESTRESET

m) Y (

XT

XTN

PAD DESCRIPTION

Name Description

VS S Negative supply voltage

V DD Positive supply voltage

X T Crystal oscillator circuit input

X TN Cr ystal oscillator circuit output
OUT1 Stepping motor driver output 1
OUT2 Stepping motor driver output 2

RESET Reset input

TEST Test mode select. 512 Hz clock output

32kHz

Oscillator

Voltage

regulator

OUT1

Divider and

Output buffer control

OUT2

Pin number: Refer to Series lineup.

NIPPON PRECISION CIRCUITS—2

−

−

−

° C

−

−

−

° C

−

CF5705 series

SPECIFICATIONS

Absolute Maximum Ratings

V

= 0 V

DD

Parameter Symbol Rating Unit

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

Recommended Operating Conditions

Parameter Symbol Rating Unit

Supply voltage V
Operating temperature T

−

−

−

−

−

∆

ε

ε

SS

IN

stg

SS

opg

5.0 to 0.3 V

V

0.3 to 0.3 V

SS

40 to 125

3.6 to

1.2 V

20 to 75

Electrical Characteristics

V

= 0 V, T

DD

Operating supply voltage V

Operating current consumption

Reset input current I

Reset input resistance R

Motor output current I

Motor output cycle time
Motor output cycle time
Motor output pulsewidth
Oscillator start voltage

Oscillator start time T

Frequency voltage deviation

Frequency deviation

Internal capacitance

1. Current consumption is measured in the measurement circuit (see next page).

2. Ref er to Series lineup.

3. ε ’ = [f (1.55V) – f’
’ = [f (2.8V) – f’

f’

: Oscillation frequency center value of Standard Deviation in the same measuring conditions

0

= 25 ° C, X’tal C

a

= 55k Ω max

I

Parameter Symbol Condition

SS

2

(normal mode)

2

(test mode) t

2

2

3

2

] / f’

(C

= 16pF)

0

0

D

] / f’

(C

= 26pF)

0

0

D

No load, V
(C

1

I

DD

TR

No load, V
(C

TR

RESET: V

1.55V

RST

RESET: V
V

RST

V

RST

R

L

R

L

From supply ON to 512 Hz output
on TEST

f/f V

SS

MOT

T

T

V

RST

CY

CY

PW

STA

STA

Built-in C

’

Built-in C

C

, C

(C

G

D

G

= –1.55V,

SS

+ C

) = 15 pF, C

G

+ C

G

=

1.35 V, V

=

2.6 V, V
= 2 k Ω , V
= 1 k Ω , V

SS

) = 24 pF, C

RST

RST

D

= –2.8V,

D

= V

, V

DD

= V

, V

DD

= –1.55V 15 35 60 k Ω

SS

= –2.8V 5 15 5 0 k Ω

SS

=

1.55 V 0.7 – – m A

SS

=

2.4 V 2.18 2.29 – m A

SS

= − 1.2 → − 3.6 V, C

D

and C

D

G

+ C

) < 62 pF Refer to the SERIES LINEUP pF

D

= 16 pF

= 26 pF

= –

SS

= –2.8V – 25 10 0 nA

SS

= 5 pF – 0.2 1 ppm/0.1V

TR

Rating

Unit

min typ max

2.0

−−

1.2 V

– 0.15 0.25 µA

– 0.40 1.00 µA

–6–nA

s

Refer to the SERIES LINEUP

ms
ms

1.3 – – V

–25s

– 8 – 8 ppm

– 16 – 16 ppm

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