900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




NXP Semiconductors Electronic Components Datasheet

PCF2003 Datasheet

CMOS

No Preview Available !

PCF2003
32 kHz watch circuit with programmable adaptive motor pulse
and pulse period
Rev. 1.1 — 16 October 2019
Product data sheet
1. General description
The PCF2003 is a CMOS integrated circuit for battery operated wrist watches with a
32 kHz quartz crystal as timing element and a bipolar 1 Hz stepping motor. The quartz
crystal oscillator and the frequency divider are optimized for minimum power
consumption. A timing accuracy of 1 ppm is achieved with a programmable, digital
frequency adjustment.
To obtain the minimum overall power consumption for the watch, an automatic motor
pulse adaptation function is provided. The circuit supplies only the minimum drive current,
which is necessary to ensure a correct motor step. Changing the drive current of the
motor is achieved by chopping the motor pulse with a variable duty cycle. The pulse
period and the range of the variable duty cycle can be programmed to suit different types
of motors. The automatic pulse adaptation scheme is based on a safe dynamic detection
of successful motor steps.
A pad RESET is provided (used for stopping the motor) for accurate time setting and for
accelerated testing of the watch.
2. Features and benefits
Amplitude-regulated 32 kHz quartz crystal oscillator, with excellent frequency stability
and high immunity to leakage currents
Electrically programmable time calibration with 1 ppm resolution stored in One Time
Programmable (OTP) memory
The quartz crystal is the only external component connected
Very low supply current, typical 90 nA
One second output pulses for bipolar stepping motor
Five different programmable output periods (1 s to 30 s)
Minimum power consumption for the entire watch, due to self adaptation of the motor
drive according to the required torque
Reliable step detection circuit
Motor pulse width, pulse modulation, and pulse adaptation range programmable in a
wide range, stored in OTP memory
Stop function for accurate time setting and power saving during shelf life
Test mode for accelerated testing of the mechanical parts of the watch and the IC
Test bits for type recognition


NXP Semiconductors Electronic Components Datasheet

PCF2003 Datasheet

CMOS

No Preview Available !

NXP Semiconductors
PCF2003
32 kHz watch circuit with programmable adaptive motor pulse
3. Applications
Driver circuits for bipolar stepping motors
High immunity motor drive circuits
4. Ordering information
Table 1. Ordering information
Type number
Topside
marking
PCF2003DUS/DA
P3
Package
Name
WLCSP8
Description
wafer level chip-size package; 8 bumps;
1.16 mm x 0.86 mm
Version
PCF2003DUS
4.1 Ordering options
Table 2. Ordering options
Type number
Orderable part
number
PCF2003DUS/DA PCF2003DUS/DAAZ
Package
WLCSP8
Packing method
Minimum
Temperature
order quantity
chips with solder bumps 4000
in tape and reel, 7 inch,
dry pack
Tamb = 10 C to +60 C
5. Block diagram
3
OSCIN
4
OSCOUT
VDD
5
VSS
1
OSCILLATOR
÷4
8 kHz
32 Hz
DIVIDER
8
RESET
RESET
TIMING ADJUSTMENT,
INHIBITION
reset
VOLTAGE DETECTOR,
OTP-CONTROLLER
OTP-MEMORY
1 Hz
MOTOR CONTROL WITH
ADAPTIVE PULSE MODULATION
2
i.c.
PCF2003
STEP
DETECTION
Fig 1. Block diagram of PCF2003
6
MOT1
7
MOT2
aaa-016619
PCF2003
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1.1 — 16 October 2019
© NXP Semiconductors N.V. 2019. All rights reserved.
2 of 28


Part Number PCF2003
Description CMOS
Maker NXP
PDF Download

PCF2003 Datasheet PDF






Similar Datasheet

1 PCF200 TRIODE - PENTODE
Philips
2 PCF2003 CMOS
NXP





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy