E1217X-WG [TEMIC]

Stepping Motor Watch, CMOS, DIE-8;


型号：	E1217X-WG
厂家：	TEMIC SEMICONDUCTORS
描述：	Stepping Motor Watch, CMOS, DIE-8
文件：	总5页 (文件大小：50K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

e1217X

32-kHz Standard Watch CMOS IC

Features

32-kHz oscillator

Integrated capacitors, mask selectable

Mask options for pad designation, motor period and

motor pulse width

1.3 V to 1.8 V operating-voltage range

180 nA typical current consumption

Voltage regulator

Low resistance outputs for bipolar stepping motor

Motor fast-test function

Pad Configuration

General Description

The e1217X is an integrated circuit in CMOS Silicon

Gate Technology for analog watches. It consists of a

32-kHz oscillator, frequency dividers down to 1/64 Hz,

output pulse formers and push-pull motor drivers. For

tuning of the crystal, integrated capacitors are provided

(selectable mask option). Low current consumption and

high oscillator stability are enabled by an on-chip voltage

regulator.

e1217X

1, 4

5, 6, 8

1 to 4

Symbol

Function

Negative supply voltage

Positive supply voltage

OSCIN/ Oscillator input/output

OSCOUT

(7/5) or (7/6)

1 to 5, 8

MOT 1/2 Motor drive outputs

RESET Reset input

95 9979

1 to 5, 8

TEST

Test input/output

Figure 1. Chip size 1.06 mm x 1.02 mm

Pad size: 112 m x 112

Pad window: 100 m x 100

Absolute Maximum Ratings

Parameters

Supply voltage

Symbol

Value

–0.3 to +5

(V –0.3 V ≤ V ≤ (V + 0.3 V)

SS ) IN DD

Unit

Input voltage range, all inputs

Output short circuit duration

Power dissipation (DIL package)

Operating ambient temperature range

Storage temperature range

indefinite

125

–20 to +70

–40 to +125

260

tot

°C

amb

stg

Lead temperature during soldering at 2 mm

distance, 10 s

sld

°C

Absolute maximum ratings define parameter limits However, precautions to minimize the build-up of elec-

which, if exceeded, may permanently change or damage trostatic charges during handling are recommended.

the device.

All inputs and outputs on TEMIC Semiconductors’ The circuit is protected against supply-voltage reversal

circuits are protected against electrostatic discharges. for typically 5 minutes.

Rev. A1, 10-Nov-99

1 (5)

e1217X

Functional Description

Voltage Regulator

RESET

A debounced RESET input is provided. Connecting the

An integrated voltage regulator provides the oscillator

RESET input to V resets the low order 12 stages of the

with a well controlled negative supply voltage V

REG

frequency divider, thus disabling further motor pulses.

Motor pulses in progress when the reset function is ap-

plied are completed. After releasing the RESET pad from

This improves the stability of the oscillator and keeps cur-

rent consumption at a minimum.

Oscillator

, the next motor pulse appears with a delay of one half

motor cycle on the drive output opposed to the former

(figure 4). Due to the debounce circuitry on the RESET

An oscillator inverter with feedback resistor is provided

for generation of the 32768 Hz clock frequency. A total

capacitance of 24 pF is integrated.This can be selected for

input, V must be applied for at least 31.2 ms. During

RESET the input current is limited to 8 nA typically.

in 2 pF increments via a mask option.

OSCOUT

Test

Frequency Divider

A test frequency of 512 Hz is output to this pad which can

be measured with a high resistance probe (R ≥ 10 M

C ≤ 20 pF). This signal can be used for testing and tuning

A 21-bit binary counter is provided, dividing the oscilla-

tor frequency down to 1/64 Hz. The leading six stages are

connected to V

and V

, while the remaining

REG

the oscillator. Connecting TEST to V for at least 4 ms

15 stages are connected to V and V

changes the motor cycle time from the selected value to

the test cycle time (mask options), while the motor pulse

width remains unchanged (figure 3).

Motor Drive Output

The e1217X contains two push-pull output buffers for

driving bipolar stepping motors. During a motor pulse,

the n-channel device of one buffer and the p-channel de-

vice of the other buffer are activated. The p-channel

devices of both buffers are active (figure 3) between two

the pulses.

This feature can be used to reduce the amount of time re-

quired for testing the mechanical parts of the watch.

Cycle time and pulse width can be chosen via a metal-

mask option (table1).

Table 1. Motor options

Cycle time T

= 2, 4, 6, 8, 10, 12, 20, 24, 30, 40, 60, 80, 120 s

= 0.98 to 14.65 ms in increments of 0.98 ms

= 250, 125, 62.5 ms

Motor pulse width t

Motor test cycle time T

2 (5)

Rev. A1, 10-Nov-99

e1217X

Operating Characteristics

= 0 V; V = –1.55 V; T

= +25°C; C = 15 pF, unless otherwise specified.

amb TR

All voltage levels are measured with reference to V . Test crystal as specified below.

Parameters

Operating voltage

Operating current

RESET input current

Motor outputs

Motor output current

Motor period

Motor pulse width

Motor test period

Oscillator

Test Conditions / Pins

Functional test (figure 2)

Symbol

Min.

–1.3

Typ.

Max.

–1.8

–300

Unit

= 16 pF, R =

–180

oscout

RESET = V

R = 2 k , V = –1.55 V

± 0.7

See option list

0.1

Stability

∆V = 100 mV,

∆f/f

ppm

= 5 pF,

Start-up voltage

Startup within 2 s

–1.3

Integrated input capacitor

Integrated output capacitor

See option list

OSC IN

= 24 pF

OSCOUTmax

OSC

OUT

Note 1: Typical parameters represent the statistical mean values

RESET

Range of trimmer capacitance:

= 5 pF to 30 pF

Test Crystal Specification

MOT1

TEST

Frequency

f = 32768 Hz

Series resistance

Static capacitance

Dynamic capacitance

Load capacitance

R = 30 k

e1217X

C = 1.5 pF

C = 3 fF

OSCIN

MOT2

C = 8 pF

Additional Notes

1. It is recommended to connect the quartz case to V

(by conductive epoxy).

OSCOUT

2. Capacitive coupling of TEST to OSCIN must be

minimized by appropriate layout of the PCB to avoid

disturbance of the oscillator.

95 9980

Figure 2. Functional test circuit

Rev. A1, 10-Nov-99

3 (5)

e1217X

T< t

T > t

TIN

TEST

MOT1

MOT2

95 9981

Figure 3. Motor drive outputs in normal mode and motor test

T< t

T > t

RIN

(open)

RESET

MOT1

MOT2

95 9982

Figure 4. Motor drive outputs and RESET

4 (5)

Rev. A1, 10-Nov-99

e1217X

Table 2. Option list e1217X–

Option

Motor

Integrated

Capacitance *)

Cycle

Pulse

Test

OSCOUT

OSCIN

)

Pad 1

Pad 2

TEST

Pad 3

Pad 4

Pad 5

Pad 6

Pad 7

Pad 8

–B

–E

3.9

125

62.5

125

62.5

125

62.5

OSCIN

OSC-

OUT

MOT2 MOT1 RESET

6.8

7.8

5.9

4.9

5.9

3.9

4.9

5.9

6.8

TEST

OSCIN

OSC-

OUT

–I

OSC-

OUT

–S

OSC-

OUT

–VA

–VB

–VC

–VE

–VF

–VH

–WB

–WG

–WH

OSC-

OUT

OSCIN

OSC-

OUT

RESET

TEST

MOT2

MOT2 MOT1

OSC-

OUT

RESET

OSC-

OUT

OSCIN

MOT2 MOT1 RESET

VDD MOT1 TEST

OSCIN

OSC-

OUT

RESET

TEST

OSC-

OUT

OSCIN

MOT2 MOT1 RESET

OSCIN

OSC-

OUT

OSC-

OUT

OSC-

OUT

*) On-chip stray capacitance included

We reserve the right to make changes to improve technical design and may do so without further notice.

Parameters can vary in different applications. All operating parameters must be validated for each customer

application by the customer. Should the buyer use TEMIC Semiconductors products for any unintended or

unauthorized application, the buyer shall indemnify TEMIC Semiconductors against all claims, costs, damages,

and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with

such unintended or unauthorized use.

TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany

Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423

Rev. A1, 10-Nov-99

5 (5)

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